Chapter 3. Installer-provisioned infrastructure | Red Hat Product Documentation

3.1. Preparing to install a cluster on AWS

You prepare to install an OpenShift Container Platform cluster on AWS by completing the following steps:

Verifying internet connectivity for your cluster.
Configuring an AWS account.
Downloading the installation program.
Note
If you are installing in a disconnected environment, you extract the installation program from the mirrored content. For more information, see Mirroring images for a disconnected installation.
Installing the OpenShift CLI (oc).
Note
If you are installing in a disconnected environment, install oc to the mirror host.
Generating an SSH key pair. You can use this key pair to authenticate into the OpenShift Container Platform cluster’s nodes after it is deployed.
If the cloud identity and access management (IAM) APIs are not accessible in your environment, or if you do not want to store an administrator-level credential secret in the kube-system namespace, manually creating long-term credentials for AWS or configuring an AWS cluster to use short-term credentials with Amazon Web Services Security Token Service (AWS STS).

3.1.1. Internet access for OpenShift Container Platform

In OpenShift Container Platform 4.17, you require access to the internet to install your cluster.

You must have internet access to:

Access OpenShift Cluster Manager to download the installation program and perform subscription management. If the cluster has internet access and you do not disable Telemetry, that service automatically entitles your cluster.
Access Quay.io to obtain the packages that are required to install your cluster.
Obtain the packages that are required to perform cluster updates.

Important

If your cluster cannot have direct internet access, you can perform a restricted network installation on some types of infrastructure that you provision. During that process, you download the required content and use it to populate a mirror registry with the installation packages. With some installation types, the environment that you install your cluster in will not require internet access. Before you update the cluster, you update the content of the mirror registry.

3.1.2. Obtaining the installation program

Before you install OpenShift Container Platform, download the installation file on the host you are using for installation.

Prerequisites

You have a computer that runs Linux or macOS, with at least 1.2 GB of local disk space.

Procedure

Go to the Cluster Type page on the Red Hat Hybrid Cloud Console. If you have a Red Hat account, log in with your credentials. If you do not, create an account.
Select your infrastructure provider from the Run it yourself section of the page.
Select your host operating system and architecture from the dropdown menus under OpenShift Installer and click Download Installer.
Place the downloaded file in the directory where you want to store the installation configuration files.
Important
- The installation program creates several files on the computer that you use to install your cluster. You must keep the installation program and the files that the installation program creates after you finish installing the cluster. Both of the files are required to delete the cluster.
- Deleting the files created by the installation program does not remove your cluster, even if the cluster failed during installation. To remove your cluster, complete the OpenShift Container Platform uninstallation procedures for your specific cloud provider.
Extract the installation program. For example, on a computer that uses a Linux operating system, run the following command:
```
$ tar -xvf openshift-install-linux.tar.gz
```
Download your installation pull secret from Red Hat OpenShift Cluster Manager. This pull secret allows you to authenticate with the services that are provided by the included authorities, including Quay.io, which serves the container images for OpenShift Container Platform components.

Tip

Alternatively, you can retrieve the installation program from the Red Hat Customer Portal, where you can specify a version of the installation program to download. However, you must have an active subscription to access this page.

3.1.3. Installing the OpenShift CLI

You can install the OpenShift CLI (oc) to interact with OpenShift Container Platform from a command-line interface. You can install oc on Linux, Windows, or macOS.

Important

If you installed an earlier version of oc, you cannot use it to complete all of the commands in OpenShift Container Platform 4.17. Download and install the new version of oc.

Installing the OpenShift CLI on Linux

You can install the OpenShift CLI (oc) binary on Linux by using the following procedure.

Procedure

Navigate to the OpenShift Container Platform downloads page on the Red Hat Customer Portal.
Select the architecture from the Product Variant drop-down list.
Select the appropriate version from the Version drop-down list.
Click Download Now next to the OpenShift v4.17 Linux Client entry and save the file.
Unpack the archive:
```
$ tar xvf <file>
```
Place the oc binary in a directory that is on your PATH.
To check your PATH, execute the following command:
```
$ echo $PATH
```

Verification

After you install the OpenShift CLI, it is available using the oc command:
```
$ oc <command>
```

Installing the OpenShift CLI on Windows

You can install the OpenShift CLI (oc) binary on Windows by using the following procedure.

Procedure

Navigate to the OpenShift Container Platform downloads page on the Red Hat Customer Portal.
Select the appropriate version from the Version drop-down list.
Click Download Now next to the OpenShift v4.17 Windows Client entry and save the file.
Unzip the archive with a ZIP program.
Move the oc binary to a directory that is on your PATH.
To check your PATH, open the command prompt and execute the following command:
```
C:\> path
```

Verification

After you install the OpenShift CLI, it is available using the oc command:
```
C:\> oc <command>
```

Installing the OpenShift CLI on macOS

You can install the OpenShift CLI (oc) binary on macOS by using the following procedure.

Procedure

Navigate to the OpenShift Container Platform downloads page on the Red Hat Customer Portal.
Select the appropriate version from the Version drop-down list.
Click Download Now next to the OpenShift v4.17 macOS Client entry and save the file.
Note
For macOS arm64, choose the OpenShift v4.17 macOS arm64 Client entry.
Unpack and unzip the archive.
Move the oc binary to a directory on your PATH.
To check your PATH, open a terminal and execute the following command:
```
$ echo $PATH
```

Verification

Verify your installation by using an oc command:
```
$ oc <command>
```

3.1.4. Generating a key pair for cluster node SSH access

During an OpenShift Container Platform installation, you can provide an SSH public key to the installation program. The key is passed to the Red Hat Enterprise Linux CoreOS (RHCOS) nodes through their Ignition config files and is used to authenticate SSH access to the nodes. The key is added to the ~/.ssh/authorized_keys list for the core user on each node, which enables password-less authentication.

After the key is passed to the nodes, you can use the key pair to SSH in to the RHCOS nodes as the user core. To access the nodes through SSH, the private key identity must be managed by SSH for your local user.

If you want to SSH in to your cluster nodes to perform installation debugging or disaster recovery, you must provide the SSH public key during the installation process. The ./openshift-install gather command also requires the SSH public key to be in place on the cluster nodes.

Important

Do not skip this procedure in production environments, where disaster recovery and debugging is required.

Note

You must use a local key, not one that you configured with platform-specific approaches such as AWS key pairs.

Procedure

If you do not have an existing SSH key pair on your local machine to use for authentication onto your cluster nodes, create one. For example, on a computer that uses a Linux operating system, run the following command:
```
$ ssh-keygen -t ed25519 -N '' -f <path>/<file_name> 1
```
1
Specify the path and file name, such as ~/.ssh/id_ed25519, of the new SSH key. If you have an existing key pair, ensure your public key is in the your ~/.ssh directory.
Note
If you plan to install an OpenShift Container Platform cluster that uses the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures, do not create a key that uses the ed25519 algorithm. Instead, create a key that uses the rsa or ecdsa algorithm.
View the public SSH key:
```
$ cat <path>/<file_name>.pub
```
For example, run the following to view the ~/.ssh/id_ed25519.pub public key:
```
$ cat ~/.ssh/id_ed25519.pub
```
Add the SSH private key identity to the SSH agent for your local user, if it has not already been added. SSH agent management of the key is required for password-less SSH authentication onto your cluster nodes, or if you want to use the ./openshift-install gather command.
Note
On some distributions, default SSH private key identities such as ~/.ssh/id_rsa and ~/.ssh/id_dsa are managed automatically.
1. If the ssh-agent process is not already running for your local user, start it as a background task:
```
$ eval "$(ssh-agent -s)"
```
  Example output
```
Agent pid 31874
```
  Note
  If your cluster is in FIPS mode, only use FIPS-compliant algorithms to generate the SSH key. The key must be either RSA or ECDSA.
Add your SSH private key to the ssh-agent:
```
$ ssh-add <path>/<file_name> 1
```
1
Specify the path and file name for your SSH private key, such as ~/.ssh/id_ed25519
Example output
```
Identity added: /home/<you>/<path>/<file_name> (<computer_name>)
```

Next steps

When you install OpenShift Container Platform, provide the SSH public key to the installation program.

3.1.5. Telemetry access for OpenShift Container Platform

In OpenShift Container Platform 4.17, the Telemetry service, which runs by default to provide metrics about cluster health and the success of updates, requires internet access. If your cluster is connected to the internet, Telemetry runs automatically, and your cluster is registered to OpenShift Cluster Manager.

After you confirm that your OpenShift Cluster Manager inventory is correct, either maintained automatically by Telemetry or manually by using OpenShift Cluster Manager, use subscription watch to track your OpenShift Container Platform subscriptions at the account or multi-cluster level.

Additional resources

See About remote health monitoring for more information about the Telemetry service

3.2. Installing a cluster on AWS

In OpenShift Container Platform version 4.17, you can install a cluster on Amazon Web Services (AWS) that uses the default configuration options.

3.2.1. Prerequisites

You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
Important
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use key-based, long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.

3.2.2. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the directory name to store the files that the installation program creates.
2
To view different installation details, specify warn, debug, or error instead of info.
When specifying the directory:
- Verify that the directory has the execute permission. This permission is required to run Terraform binaries under the installation directory.
- Use an empty directory. Some installation assets, such as bootstrap X.509 certificates, have short expiration intervals, therefore you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
Provide values at the prompts:
1. Optional: Select an SSH key to use to access your cluster machines.
  Note
  For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
2. Select aws as the platform to target.
3. If you do not have an Amazon Web Services (AWS) profile stored on your computer, enter the AWS access key ID and secret access key for the user that you configured to run the installation program.
  Note
  The AWS access key ID and secret access key are stored in ~/.aws/credentials in the home directory of the current user on the installation host. You are prompted for the credentials by the installation program if the credentials for the exported profile are not present in the file. Any credentials that you provide to the installation program are stored in the file.
4. Select the AWS region to deploy the cluster to.
5. Select the base domain for the Route 53 service that you configured for your cluster.
6. Enter a descriptive name for your cluster.
7. Paste the pull secret from Red Hat OpenShift Cluster Manager.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

Additional resources

See Configuration and credential file settings in the AWS documentation for more information about AWS profile and credential configuration.

3.2.3. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.2.4. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

See Accessing the web console for more details about accessing and understanding the OpenShift Container Platform web console.

3.2.5. Next steps

Validating an installation.
Customize your cluster.
If necessary, you can opt out of remote health reporting.
If necessary, you can remove cloud provider credentials.

3.3. Installing a cluster on AWS with customizations

In OpenShift Container Platform version 4.17, you can install a customized cluster on infrastructure that the installation program provisions on Amazon Web Services (AWS). To customize the installation, you modify parameters in the install-config.yaml file before you install the cluster.

Note

The scope of the OpenShift Container Platform installation configurations is intentionally narrow. It is designed for simplicity and ensured success. You can complete many more OpenShift Container Platform configuration tasks after an installation completes.

3.3.1. Prerequisites

You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
Important
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.

3.3.2. Obtaining an AWS Marketplace image

If you are deploying an OpenShift Container Platform cluster using an AWS Marketplace image, you must first subscribe through AWS. Subscribing to the offer provides you with the AMI ID that the installation program uses to deploy compute nodes.

Prerequisites

You have an AWS account to purchase the offer. This account does not have to be the same account that is used to install the cluster.

Procedure

Complete the OpenShift Container Platform subscription from the AWS Marketplace.
Record the AMI ID for your specific AWS Region. As part of the installation process, you must update the install-config.yaml file with this value before deploying the cluster.
Sample install-config.yaml file with AWS Marketplace compute nodes
```
apiVersion: v1
baseDomain: example.com
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      amiID: ami-06c4d345f7c207239 1
      type: m5.4xlarge
  replicas: 3
metadata:
  name: test-cluster
platform:
  aws:
    region: us-east-2 2
sshKey: ssh-ed25519 AAAA...
pullSecret: '{"auths": ...}'
```
1
The AMI ID from your AWS Marketplace subscription.
2
Your AMI ID is associated with a specific AWS Region. When creating the installation configuration file, ensure that you select the same AWS Region that you specified when configuring your subscription.

3.3.3. Creating the installation configuration file

You can customize the OpenShift Container Platform cluster you install on Amazon Web Services (AWS).

Prerequisites

You have the OpenShift Container Platform installation program and the pull secret for your cluster.

Procedure

Create the install-config.yaml file.
1. Change to the directory that contains the installation program and run the following command:
```
$ ./openshift-install create install-config --dir <installation_directory> 1
```
  1
  For <installation_directory>, specify the directory name to store the files that the installation program creates.
  When specifying the directory:
  - Verify that the directory has the execute permission. This permission is required to run Terraform binaries under the installation directory.
  - Use an empty directory. Some installation assets, such as bootstrap X.509 certificates, have short expiration intervals, therefore you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
2. At the prompts, provide the configuration details for your cloud:
  1. Optional: Select an SSH key to use to access your cluster machines.
    Note
    For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
  2. Select AWS as the platform to target.
  3. If you do not have an Amazon Web Services (AWS) profile stored on your computer, enter the AWS access key ID and secret access key for the user that you configured to run the installation program.
  4. Select the AWS region to deploy the cluster to.
  5. Select the base domain for the Route 53 service that you configured for your cluster.
  6. Enter a descriptive name for your cluster.
Modify the install-config.yaml file. You can find more information about the available parameters in the "Installation configuration parameters" section.
Note
If you are installing a three-node cluster, be sure to set the compute.replicas parameter to 0. This ensures that the cluster’s control planes are schedulable. For more information, see "Installing a three-node cluster on AWS".
Back up the install-config.yaml file so that you can use it to install multiple clusters.
Important
The install-config.yaml file is consumed during the installation process. If you want to reuse the file, you must back it up now.

Additional resources

Installation configuration parameters for AWS

3.3.3.1. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.1. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

Additional resources

Optimizing storage

3.3.3.2. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.1. Machine types based on 64-bit x86 architecture

c4.*
c5.*
c5a.*
i3.*
m4.*
m5.*
m5a.*
m6a.*
m6i.*
r4.*
r5.*
r5a.*
r6i.*
t3.*
t3a.*

3.3.3.3. Tested instance types for AWS on 64-bit ARM infrastructures

The following Amazon Web Services (AWS) 64-bit ARM instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS ARM instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in "Minimum resource requirements for cluster installation".

Example 3.2. Machine types based on 64-bit ARM architecture

c6g.*
c7g.*
m6g.*
m7g.*
r8g.*

3.3.3.4. Sample customized install-config.yaml file for AWS

You can customize the installation configuration file (install-config.yaml) to specify more details about your OpenShift Container Platform cluster’s platform or modify the values of the required parameters.

Important

This sample YAML file is provided for reference only. You must obtain your install-config.yaml file by using the installation program and modify it.

apiVersion: v1
baseDomain: example.com 1
credentialsMode: Mint 2
controlPlane: 3 4
  hyperthreading: Enabled 5
  name: master
  platform:
    aws:
      zones:
      - us-west-2a
      - us-west-2b
      rootVolume:
        iops: 4000
        size: 500
        type: io1 6
      metadataService:
        authentication: Optional 7
      type: m6i.xlarge
  replicas: 3
compute: 8
- hyperthreading: Enabled 9
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1 10
      metadataService:
        authentication: Optional 11
      type: c5.4xlarge
      zones:
      - us-west-2c
  replicas: 3
metadata:
  name: test-cluster 12
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 13
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: us-west-2 14
    propagateUserTags: true 15
    userTags:
      adminContact: jdoe
      costCenter: 7536
    amiID: ami-0c5d3e03c0ab9b19a 16
    serviceEndpoints: 17
      - name: ec2
        url: https://vpce-id.ec2.us-west-2.vpce.amazonaws.com
fips: false 18
sshKey: ssh-ed25519 AAAA... 19
pullSecret: '{"auths": ...}' 20

1 12 14 20: Required. The installation program prompts you for this value.
2: Optional: Add this parameter to force the Cloud Credential Operator (CCO) to use the specified mode. By default, the CCO uses the root credentials in the kube-system namespace to dynamically try to determine the capabilities of the credentials. For details about CCO modes, see the "About the Cloud Credential Operator" section in the Authentication and authorization guide.
3 8 15: If you do not provide these parameters and values, the installation program provides the default value.
4: The controlPlane section is a single mapping, but the compute section is a sequence of mappings. To meet the requirements of the different data structures, the first line of the compute section must begin with a hyphen, -, and the first line of the controlPlane section must not. Only one control plane pool is used.
5 9: Whether to enable or disable simultaneous multithreading, or hyperthreading. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to Disabled. If you disable simultaneous multithreading in some cluster machines, you must disable it in all cluster machines.
Important
If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance. Use larger instance types, such as m4.2xlarge or m5.2xlarge, for your machines if you disable simultaneous multithreading.
6 10: To configure faster storage for etcd, especially for larger clusters, set the storage type as io1 and set iops to 2000.
7 11: Whether to require the Amazon EC2 Instance Metadata Service v2 (IMDSv2). To require IMDSv2, set the parameter value to Required. To allow the use of both IMDSv1 and IMDSv2, set the parameter value to Optional. If no value is specified, both IMDSv1 and IMDSv2 are allowed.
Note
The IMDS configuration for control plane machines that is set during cluster installation can only be changed by using the AWS CLI. The IMDS configuration for compute machines can be changed by using compute machine sets.
13: The cluster network plugin to install. The default value OVNKubernetes is the only supported value.
16: The ID of the AMI used to boot machines for the cluster. If set, the AMI must belong to the same region as the cluster.
17: The AWS service endpoints. Custom endpoints are required when installing to an unknown AWS region. The endpoint URL must use the https protocol and the host must trust the certificate.
18: Whether to enable or disable FIPS mode. By default, FIPS mode is not enabled. If FIPS mode is enabled, the Red Hat Enterprise Linux CoreOS (RHCOS) machines that OpenShift Container Platform runs on bypass the default Kubernetes cryptography suite and use the cryptography modules that are provided with RHCOS instead.
Important
To enable FIPS mode for your cluster, you must run the installation program from a Red Hat Enterprise Linux (RHEL) computer configured to operate in FIPS mode. For more information about configuring FIPS mode on RHEL, see Switching RHEL to FIPS mode.
When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.
19: You can optionally provide the sshKey value that you use to access the machines in your cluster.
Note
For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.

3.3.3.5. Configuring the cluster-wide proxy during installation

Production environments can deny direct access to the internet and instead have an HTTP or HTTPS proxy available. You can configure a new OpenShift Container Platform cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

You have an existing install-config.yaml file.
You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.
Note
The Proxy object status.noProxy field is populated with the values of the networking.machineNetwork[].cidr, networking.clusterNetwork[].cidr, and networking.serviceNetwork[] fields from your installation configuration.
For installations on Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, and Red Hat OpenStack Platform (RHOSP), the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

Edit your install-config.yaml file and add the proxy settings. For example:
```
apiVersion: v1
baseDomain: my.domain.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port> 1
  httpsProxy: https://<username>:<pswd>@<ip>:<port> 2
  noProxy: ec2.<aws_region>.amazonaws.com,elasticloadbalancing.<aws_region>.amazonaws.com,s3.<aws_region>.amazonaws.com 3
additionalTrustBundle: | 4
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> 5
```
1
A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
2
A proxy URL to use for creating HTTPS connections outside the cluster.
3
A comma-separated list of destination domain names, IP addresses, or other network CIDRs to exclude from proxying. Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass the proxy for all destinations. If you have added the Amazon EC2,Elastic Load Balancing, and S3 VPC endpoints to your VPC, you must add these endpoints to the noProxy field.
4
If provided, the installation program generates a config map that is named user-ca-bundle in the openshift-config namespace that contains one or more additional CA certificates that are required for proxying HTTPS connections. The Cluster Network Operator then creates a trusted-ca-bundle config map that merges these contents with the Red Hat Enterprise Linux CoreOS (RHCOS) trust bundle, and this config map is referenced in the trustedCA field of the Proxy object. The additionalTrustBundle field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.
5
Optional: The policy to determine the configuration of the Proxy object to reference the user-ca-bundle config map in the trustedCA field. The allowed values are Proxyonly and Always. Use Proxyonly to reference the user-ca-bundle config map only when http/https proxy is configured. Use Always to always reference the user-ca-bundle config map. The default value is Proxyonly.
Note
The installation program does not support the proxy readinessEndpoints field.
Note
If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:
```
$ ./openshift-install wait-for install-complete --log-level debug
```
Save the file and reference it when installing OpenShift Container Platform.

The installation program creates a cluster-wide proxy that is named cluster that uses the proxy settings in the provided install-config.yaml file. If no proxy settings are provided, a cluster Proxy object is still created, but it will have a nil spec.

Note

Only the Proxy object named cluster is supported, and no additional proxies can be created.

3.3.4. Alternatives to storing administrator-level secrets in the kube-system project

By default, administrator secrets are stored in the kube-system project. If you configured the credentialsMode parameter in the install-config.yaml file to Manual, you must use one of the following alternatives:

To manage long-term cloud credentials manually, follow the procedure in Manually creating long-term credentials.
To implement short-term credentials that are managed outside the cluster for individual components, follow the procedures in Configuring an AWS cluster to use short-term credentials.

3.3.4.1. Manually creating long-term credentials

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```

Extract the list of CredentialsRequest custom resources (CRs) from the OpenShift Container Platform release image by running the following command:

$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3

1: The --included parameter includes only the manifests that your specific cluster configuration requires.
2: Specify the location of the install-config.yaml file.
3: Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

This command creates a YAML file for each CredentialsRequest object.

Sample CredentialsRequest object

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - iam:GetUser
      - iam:GetUserPolicy
      - iam:ListAccessKeys
      resource: "*"
  ...

Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object.

Sample CredentialsRequest object with secrets

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - s3:CreateBucket
      - s3:DeleteBucket
      resource: "*"
      ...
  secretRef:
    name: <component_secret>
    namespace: <component_namespace>
  ...

Sample Secret object

apiVersion: v1
kind: Secret
metadata:
  name: <component_secret>
  namespace: <component_namespace>
data:
  aws_access_key_id: <base64_encoded_aws_access_key_id>
  aws_secret_access_key: <base64_encoded_aws_secret_access_key>

Important

Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

3.3.4.2. Configuring an AWS cluster to use short-term credentials

To install a cluster that is configured to use the AWS Security Token Service (STS), you must configure the CCO utility and create the required AWS resources for your cluster.

3.3.4.2.1. Configuring the Cloud Credential Operator utility

To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.

Note

The ccoctl utility is a Linux binary that must run in a Linux environment.

Prerequisites

You have access to an OpenShift Container Platform account with cluster administrator access.
You have installed the OpenShift CLI (oc).

You have created an AWS account for the ccoctl utility to use with the following permissions:
Example 3.3. Required AWS permissions
Required iam permissions
- iam:CreateOpenIDConnectProvider
- iam:CreateRole
- iam:DeleteOpenIDConnectProvider
- iam:DeleteRole
- iam:DeleteRolePolicy
- iam:GetOpenIDConnectProvider
- iam:GetRole
- iam:GetUser
- iam:ListOpenIDConnectProviders
- iam:ListRolePolicies
- iam:ListRoles
- iam:PutRolePolicy
- iam:TagOpenIDConnectProvider
- iam:TagRole
Required s3 permissions
- s3:CreateBucket
- s3:DeleteBucket
- s3:DeleteObject
- s3:GetBucketAcl
- s3:GetBucketTagging
- s3:GetObject
- s3:GetObjectAcl
- s3:GetObjectTagging
- s3:ListBucket
- s3:PutBucketAcl
- s3:PutBucketPolicy
- s3:PutBucketPublicAccessBlock
- s3:PutBucketTagging
- s3:PutObject
- s3:PutObjectAcl
- s3:PutObjectTagging
Required cloudfront permissions
- cloudfront:ListCloudFrontOriginAccessIdentities
- cloudfront:ListDistributions
- cloudfront:ListTagsForResource
If you plan to store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL, the AWS account that runs the ccoctl utility requires the following additional permissions:
Example 3.4. Additional permissions for a private S3 bucket with CloudFront
- cloudfront:CreateCloudFrontOriginAccessIdentity
- cloudfront:CreateDistribution
- cloudfront:DeleteCloudFrontOriginAccessIdentity
- cloudfront:DeleteDistribution
- cloudfront:GetCloudFrontOriginAccessIdentity
- cloudfront:GetCloudFrontOriginAccessIdentityConfig
- cloudfront:GetDistribution
- cloudfront:TagResource
- cloudfront:UpdateDistribution
Note
These additional permissions support the use of the --create-private-s3-bucket option when processing credentials requests with the ccoctl aws create-all command.

Procedure

Set a variable for the OpenShift Container Platform release image by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
```
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
```
Note
Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.
Extract the ccoctl binary from the CCO container image within the OpenShift Container Platform release image by running the following command:
```
$ oc image extract $CCO_IMAGE \
  --file="/usr/bin/ccoctl.<rhel_version>" \1
  -a ~/.pull-secret
```
1
For <rhel_version>, specify the value that corresponds to the version of Red Hat Enterprise Linux (RHEL) that the host uses. If no value is specified, ccoctl.rhel8 is used by default. The following values are valid:
rhel8: Specify this value for hosts that use RHEL 8.
rhel9: Specify this value for hosts that use RHEL 9.
Change the permissions to make ccoctl executable by running the following command:
```
$ chmod 775 ccoctl.<rhel_version>
```

Verification

To verify that ccoctl is ready to use, display the help file. Use a relative file name when you run the command, for example:

$ ./ccoctl.rhel9

Example output

OpenShift credentials provisioning tool

Usage:
  ccoctl [command]

Available Commands:
  aws          Manage credentials objects for AWS cloud
  azure        Manage credentials objects for Azure
  gcp          Manage credentials objects for Google cloud
  help         Help about any command
  ibmcloud     Manage credentials objects for {ibm-cloud-title}
  nutanix      Manage credentials objects for Nutanix

Flags:
  -h, --help   help for ccoctl

Use "ccoctl [command] --help" for more information about a command.

3.3.4.2.2. Creating AWS resources with the Cloud Credential Operator utility

You have the following options when creating AWS resources:

You can use the ccoctl aws create-all command to create the AWS resources automatically. This is the quickest way to create the resources. See Creating AWS resources with a single command.
If you need to review the JSON files that the ccoctl tool creates before modifying AWS resources, or if the process the ccoctl tool uses to create AWS resources automatically does not meet the requirements of your organization, you can create the AWS resources individually. See Creating AWS resources individually.

3.3.4.2.2.1. Creating AWS resources with a single command

If the process the ccoctl tool uses to create AWS resources automatically meets the requirements of your organization, you can use the ccoctl aws create-all command to automate the creation of AWS resources.

Otherwise, you can create the AWS resources individually. For more information, see "Creating AWS resources individually".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Prerequisites

You must have:

Extracted and prepared the ccoctl binary.

Procedure

Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image by running the following command:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
1
The --included parameter includes only the manifests that your specific cluster configuration requires.
2
Specify the location of the install-config.yaml file.
3
Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
Note
This command might take a few moments to run.
Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-all \
  --name=<name> \1
  --region=<aws_region> \2
  --credentials-requests-dir=<path_to_credentials_requests_directory> \3
  --output-dir=<path_to_ccoctl_output_dir> \4
  --create-private-s3-bucket 5
```
1
Specify the name used to tag any cloud resources that are created for tracking.
2
Specify the AWS region in which cloud resources will be created.
3
Specify the directory containing the files for the component CredentialsRequest objects.
4
Optional: Specify the directory in which you want the ccoctl utility to create objects. By default, the utility creates objects in the directory in which the commands are run.
5
Optional: By default, the ccoctl utility stores the OpenID Connect (OIDC) configuration files in a public S3 bucket and uses the S3 URL as the public OIDC endpoint. To store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL instead, use the --create-private-s3-bucket parameter.
Note
If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.3.4.2.2.2. Creating AWS resources individually

You can use the ccoctl tool to create AWS resources individually. This option might be useful for an organization that shares the responsibility for creating these resources among different users or departments.

Otherwise, you can use the ccoctl aws create-all command to create the AWS resources automatically. For more information, see "Creating AWS resources with a single command".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Some ccoctl commands make AWS API calls to create or modify AWS resources. You can use the --dry-run flag to avoid making API calls. Using this flag creates JSON files on the local file system instead. You can review and modify the JSON files and then apply them with the AWS CLI tool using the --cli-input-json parameters.

Prerequisites

Extract and prepare the ccoctl binary.

Procedure

Generate the public and private RSA key files that are used to set up the OpenID Connect provider for the cluster by running the following command:
```
$ ccoctl aws create-key-pair
```
Example output
```
2021/04/13 11:01:02 Generating RSA keypair
2021/04/13 11:01:03 Writing private key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.private
2021/04/13 11:01:03 Writing public key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.public
2021/04/13 11:01:03 Copying signing key for use by installer
```
where serviceaccount-signer.private and serviceaccount-signer.public are the generated key files.
This command also creates a private key that the cluster requires during installation in /<path_to_ccoctl_output_dir>/tls/bound-service-account-signing-key.key.
Create an OpenID Connect identity provider and S3 bucket on AWS by running the following command:
```
$ ccoctl aws create-identity-provider \
  --name=<name> \1
  --region=<aws_region> \2
  --public-key-file=<path_to_ccoctl_output_dir>/serviceaccount-signer.public 3
```
1
<name> is the name used to tag any cloud resources that are created for tracking.
2
<aws-region> is the AWS region in which cloud resources will be created.
3
<path_to_ccoctl_output_dir> is the path to the public key file that the ccoctl aws create-key-pair command generated.
Example output
```
2021/04/13 11:16:09 Bucket <name>-oidc created
2021/04/13 11:16:10 OpenID Connect discovery document in the S3 bucket <name>-oidc at .well-known/openid-configuration updated
2021/04/13 11:16:10 Reading public key
2021/04/13 11:16:10 JSON web key set (JWKS) in the S3 bucket <name>-oidc at keys.json updated
2021/04/13 11:16:18 Identity Provider created with ARN: arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
where openid-configuration is a discovery document and keys.json is a JSON web key set file.
This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/cluster-authentication-02-config.yaml. This file sets the issuer URL field for the service account tokens that the cluster generates, so that the AWS IAM identity provider trusts the tokens.
Create IAM roles for each component in the cluster:
1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
2. Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
  1
  The --included parameter includes only the manifests that your specific cluster configuration requires.
  2
  Specify the location of the install-config.yaml file.
  3
  Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-iam-roles \
  --name=<name> \
  --region=<aws_region> \
  --credentials-requests-dir=<path_to_credentials_requests_directory> \
  --identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
  Note
  For AWS environments that use alternative IAM API endpoints, such as GovCloud, you must also specify your region with the --region parameter.
  If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.
  For each CredentialsRequest object, ccoctl creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy as defined in each CredentialsRequest object from the OpenShift Container Platform release image.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.3.4.2.3. Incorporating the Cloud Credential Operator utility manifests

To implement short-term security credentials managed outside the cluster for individual components, you must move the manifest files that the Cloud Credential Operator utility (ccoctl) created to the correct directories for the installation program.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have configured the Cloud Credential Operator utility (ccoctl).
You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:
```
$ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/
```
Copy the tls directory that contains the private key to the installation directory:
```
$ cp -a /<path_to_ccoctl_output_dir>/tls .
```

3.3.5. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.3.6. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.3.7. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

See Accessing the web console for more details about accessing and understanding the OpenShift Container Platform web console.

3.3.8. Next steps

Validating an installation.
Customize your cluster.
If necessary, you can opt out of remote health reporting.
If necessary, you can remove cloud provider credentials.

3.4. Installing a cluster on AWS with network customizations

In OpenShift Container Platform version 4.17, you can install a cluster on Amazon Web Services (AWS) with customized network configuration options. By customizing your network configuration, your cluster can coexist with existing IP address allocations in your environment and integrate with existing MTU and VXLAN configurations.

You must set most of the network configuration parameters during installation, and you can modify only kubeProxy configuration parameters in a running cluster.

3.4.1. Prerequisites

You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
Important
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use key-based, long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.

3.4.2. Network configuration phases

There are two phases prior to OpenShift Container Platform installation where you can customize the network configuration.

Phase 1

You can customize the following network-related fields in the install-config.yaml file before you create the manifest files:

networking.networkType
networking.clusterNetwork
networking.serviceNetwork
networking.machineNetwork
For more information, see "Installation configuration parameters".
Note
Set the networking.machineNetwork to match the Classless Inter-Domain Routing (CIDR) where the preferred subnet is located.
Important
The CIDR range 172.17.0.0/16 is reserved by libVirt. You cannot use any other CIDR range that overlaps with the 172.17.0.0/16 CIDR range for networks in your cluster.

Phase 2

After creating the manifest files by running openshift-install create manifests, you can define a customized Cluster Network Operator manifest with only the fields you want to modify. You can use the manifest to specify advanced network configuration.

During phase 2, you cannot override the values that you specified in phase 1 in the install-config.yaml file. However, you can customize the network plugin during phase 2.

3.4.3. Creating the installation configuration file

You can customize the OpenShift Container Platform cluster you install on Amazon Web Services (AWS).

Prerequisites

You have the OpenShift Container Platform installation program and the pull secret for your cluster.

Procedure

Create the install-config.yaml file.
1. Change to the directory that contains the installation program and run the following command:
```
$ ./openshift-install create install-config --dir <installation_directory> 1
```
  1
  For <installation_directory>, specify the directory name to store the files that the installation program creates.
  When specifying the directory:
  - Verify that the directory has the execute permission. This permission is required to run Terraform binaries under the installation directory.
  - Use an empty directory. Some installation assets, such as bootstrap X.509 certificates, have short expiration intervals, therefore you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
2. At the prompts, provide the configuration details for your cloud:
  1. Optional: Select an SSH key to use to access your cluster machines.
    Note
    For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
  2. Select AWS as the platform to target.
  3. If you do not have an Amazon Web Services (AWS) profile stored on your computer, enter the AWS access key ID and secret access key for the user that you configured to run the installation program.
  4. Select the AWS region to deploy the cluster to.
  5. Select the base domain for the Route 53 service that you configured for your cluster.
  6. Enter a descriptive name for your cluster.
Modify the install-config.yaml file. You can find more information about the available parameters in the "Installation configuration parameters" section.
Back up the install-config.yaml file so that you can use it to install multiple clusters.
Important
The install-config.yaml file is consumed during the installation process. If you want to reuse the file, you must back it up now.

Additional resources

Installation configuration parameters for AWS

3.4.3.1. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.2. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

Additional resources

Optimizing storage

3.4.3.2. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.5. Machine types based on 64-bit x86 architecture

c4.*
c5.*
c5a.*
i3.*
m4.*
m5.*
m5a.*
m6a.*
m6i.*
r4.*
r5.*
r5a.*
r6i.*
t3.*
t3a.*

3.4.3.3. Tested instance types for AWS on 64-bit ARM infrastructures

The following Amazon Web Services (AWS) 64-bit ARM instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS ARM instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in "Minimum resource requirements for cluster installation".

Example 3.6. Machine types based on 64-bit ARM architecture

c6g.*
c7g.*
m6g.*
m7g.*
r8g.*

3.4.3.4. Sample customized install-config.yaml file for AWS

You can customize the installation configuration file (install-config.yaml) to specify more details about your OpenShift Container Platform cluster’s platform or modify the values of the required parameters.

Important

This sample YAML file is provided for reference only. You must obtain your install-config.yaml file by using the installation program and modify it.

apiVersion: v1
baseDomain: example.com 1
credentialsMode: Mint 2
controlPlane: 3 4
  hyperthreading: Enabled 5
  name: master
  platform:
    aws:
      zones:
      - us-west-2a
      - us-west-2b
      rootVolume:
        iops: 4000
        size: 500
        type: io1 6
      metadataService:
        authentication: Optional 7
      type: m6i.xlarge
  replicas: 3
compute: 8
- hyperthreading: Enabled 9
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1 10
      metadataService:
        authentication: Optional 11
      type: c5.4xlarge
      zones:
      - us-west-2c
  replicas: 3
metadata:
  name: test-cluster 12
networking: 13
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 14
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: us-west-2 15
    propagateUserTags: true 16
    userTags:
      adminContact: jdoe
      costCenter: 7536
    amiID: ami-0c5d3e03c0ab9b19a 17
    serviceEndpoints: 18
      - name: ec2
        url: https://vpce-id.ec2.us-west-2.vpce.amazonaws.com
fips: false 19
sshKey: ssh-ed25519 AAAA... 20
pullSecret: '{"auths": ...}' 21

1 12 15 21: Required. The installation program prompts you for this value.
2: Optional: Add this parameter to force the Cloud Credential Operator (CCO) to use the specified mode. By default, the CCO uses the root credentials in the kube-system namespace to dynamically try to determine the capabilities of the credentials. For details about CCO modes, see the "About the Cloud Credential Operator" section in the Authentication and authorization guide.
3 8 13 16: If you do not provide these parameters and values, the installation program provides the default value.
4: The controlPlane section is a single mapping, but the compute section is a sequence of mappings. To meet the requirements of the different data structures, the first line of the compute section must begin with a hyphen, -, and the first line of the controlPlane section must not. Only one control plane pool is used.
5 9: Whether to enable or disable simultaneous multithreading, or hyperthreading. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to Disabled. If you disable simultaneous multithreading in some cluster machines, you must disable it in all cluster machines.
Important
If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance. Use larger instance types, such as m4.2xlarge or m5.2xlarge, for your machines if you disable simultaneous multithreading.
6 10: To configure faster storage for etcd, especially for larger clusters, set the storage type as io1 and set iops to 2000.
7 11: Whether to require the Amazon EC2 Instance Metadata Service v2 (IMDSv2). To require IMDSv2, set the parameter value to Required. To allow the use of both IMDSv1 and IMDSv2, set the parameter value to Optional. If no value is specified, both IMDSv1 and IMDSv2 are allowed.
Note
The IMDS configuration for control plane machines that is set during cluster installation can only be changed by using the AWS CLI. The IMDS configuration for compute machines can be changed by using compute machine sets.
14: The cluster network plugin to install. The default value OVNKubernetes is the only supported value.
17: The ID of the AMI used to boot machines for the cluster. If set, the AMI must belong to the same region as the cluster.
18: The AWS service endpoints. Custom endpoints are required when installing to an unknown AWS region. The endpoint URL must use the https protocol and the host must trust the certificate.
19: Whether to enable or disable FIPS mode. By default, FIPS mode is not enabled. If FIPS mode is enabled, the Red Hat Enterprise Linux CoreOS (RHCOS) machines that OpenShift Container Platform runs on bypass the default Kubernetes cryptography suite and use the cryptography modules that are provided with RHCOS instead.
Important
To enable FIPS mode for your cluster, you must run the installation program from a Red Hat Enterprise Linux (RHEL) computer configured to operate in FIPS mode. For more information about configuring FIPS mode on RHEL, see Switching RHEL to FIPS mode.
When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.
20: You can optionally provide the sshKey value that you use to access the machines in your cluster.
Note
For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.

3.4.3.5. Configuring the cluster-wide proxy during installation

Production environments can deny direct access to the internet and instead have an HTTP or HTTPS proxy available. You can configure a new OpenShift Container Platform cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

You have an existing install-config.yaml file.
You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.
Note
The Proxy object status.noProxy field is populated with the values of the networking.machineNetwork[].cidr, networking.clusterNetwork[].cidr, and networking.serviceNetwork[] fields from your installation configuration.
For installations on Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, and Red Hat OpenStack Platform (RHOSP), the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

Edit your install-config.yaml file and add the proxy settings. For example:
```
apiVersion: v1
baseDomain: my.domain.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port> 1
  httpsProxy: https://<username>:<pswd>@<ip>:<port> 2
  noProxy: ec2.<aws_region>.amazonaws.com,elasticloadbalancing.<aws_region>.amazonaws.com,s3.<aws_region>.amazonaws.com 3
additionalTrustBundle: | 4
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> 5
```
1
A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
2
A proxy URL to use for creating HTTPS connections outside the cluster.
3
A comma-separated list of destination domain names, IP addresses, or other network CIDRs to exclude from proxying. Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass the proxy for all destinations. If you have added the Amazon EC2,Elastic Load Balancing, and S3 VPC endpoints to your VPC, you must add these endpoints to the noProxy field.
4
If provided, the installation program generates a config map that is named user-ca-bundle in the openshift-config namespace that contains one or more additional CA certificates that are required for proxying HTTPS connections. The Cluster Network Operator then creates a trusted-ca-bundle config map that merges these contents with the Red Hat Enterprise Linux CoreOS (RHCOS) trust bundle, and this config map is referenced in the trustedCA field of the Proxy object. The additionalTrustBundle field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.
5
Optional: The policy to determine the configuration of the Proxy object to reference the user-ca-bundle config map in the trustedCA field. The allowed values are Proxyonly and Always. Use Proxyonly to reference the user-ca-bundle config map only when http/https proxy is configured. Use Always to always reference the user-ca-bundle config map. The default value is Proxyonly.
Note
The installation program does not support the proxy readinessEndpoints field.
Note
If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:
```
$ ./openshift-install wait-for install-complete --log-level debug
```
Save the file and reference it when installing OpenShift Container Platform.

The installation program creates a cluster-wide proxy that is named cluster that uses the proxy settings in the provided install-config.yaml file. If no proxy settings are provided, a cluster Proxy object is still created, but it will have a nil spec.

Note

Only the Proxy object named cluster is supported, and no additional proxies can be created.

3.4.4. Alternatives to storing administrator-level secrets in the kube-system project

By default, administrator secrets are stored in the kube-system project. If you configured the credentialsMode parameter in the install-config.yaml file to Manual, you must use one of the following alternatives:

To manage long-term cloud credentials manually, follow the procedure in Manually creating long-term credentials.
To implement short-term credentials that are managed outside the cluster for individual components, follow the procedures in Configuring an AWS cluster to use short-term credentials.

3.4.4.1. Manually creating long-term credentials

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```

Extract the list of CredentialsRequest custom resources (CRs) from the OpenShift Container Platform release image by running the following command:

$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3

1: The --included parameter includes only the manifests that your specific cluster configuration requires.
2: Specify the location of the install-config.yaml file.
3: Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

This command creates a YAML file for each CredentialsRequest object.

Sample CredentialsRequest object

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - iam:GetUser
      - iam:GetUserPolicy
      - iam:ListAccessKeys
      resource: "*"
  ...

Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object.

Sample CredentialsRequest object with secrets

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - s3:CreateBucket
      - s3:DeleteBucket
      resource: "*"
      ...
  secretRef:
    name: <component_secret>
    namespace: <component_namespace>
  ...

Sample Secret object

apiVersion: v1
kind: Secret
metadata:
  name: <component_secret>
  namespace: <component_namespace>
data:
  aws_access_key_id: <base64_encoded_aws_access_key_id>
  aws_secret_access_key: <base64_encoded_aws_secret_access_key>

Important

Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

3.4.4.2. Configuring an AWS cluster to use short-term credentials

To install a cluster that is configured to use the AWS Security Token Service (STS), you must configure the CCO utility and create the required AWS resources for your cluster.

3.4.4.2.1. Configuring the Cloud Credential Operator utility

To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.

Note

The ccoctl utility is a Linux binary that must run in a Linux environment.

Prerequisites

You have access to an OpenShift Container Platform account with cluster administrator access.
You have installed the OpenShift CLI (oc).

You have created an AWS account for the ccoctl utility to use with the following permissions:
Example 3.7. Required AWS permissions
Required iam permissions
- iam:CreateOpenIDConnectProvider
- iam:CreateRole
- iam:DeleteOpenIDConnectProvider
- iam:DeleteRole
- iam:DeleteRolePolicy
- iam:GetOpenIDConnectProvider
- iam:GetRole
- iam:GetUser
- iam:ListOpenIDConnectProviders
- iam:ListRolePolicies
- iam:ListRoles
- iam:PutRolePolicy
- iam:TagOpenIDConnectProvider
- iam:TagRole
Required s3 permissions
- s3:CreateBucket
- s3:DeleteBucket
- s3:DeleteObject
- s3:GetBucketAcl
- s3:GetBucketTagging
- s3:GetObject
- s3:GetObjectAcl
- s3:GetObjectTagging
- s3:ListBucket
- s3:PutBucketAcl
- s3:PutBucketPolicy
- s3:PutBucketPublicAccessBlock
- s3:PutBucketTagging
- s3:PutObject
- s3:PutObjectAcl
- s3:PutObjectTagging
Required cloudfront permissions
- cloudfront:ListCloudFrontOriginAccessIdentities
- cloudfront:ListDistributions
- cloudfront:ListTagsForResource
If you plan to store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL, the AWS account that runs the ccoctl utility requires the following additional permissions:
Example 3.8. Additional permissions for a private S3 bucket with CloudFront
- cloudfront:CreateCloudFrontOriginAccessIdentity
- cloudfront:CreateDistribution
- cloudfront:DeleteCloudFrontOriginAccessIdentity
- cloudfront:DeleteDistribution
- cloudfront:GetCloudFrontOriginAccessIdentity
- cloudfront:GetCloudFrontOriginAccessIdentityConfig
- cloudfront:GetDistribution
- cloudfront:TagResource
- cloudfront:UpdateDistribution
Note
These additional permissions support the use of the --create-private-s3-bucket option when processing credentials requests with the ccoctl aws create-all command.

Procedure

Set a variable for the OpenShift Container Platform release image by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
```
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
```
Note
Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.
Extract the ccoctl binary from the CCO container image within the OpenShift Container Platform release image by running the following command:
```
$ oc image extract $CCO_IMAGE \
  --file="/usr/bin/ccoctl.<rhel_version>" \1
  -a ~/.pull-secret
```
1
For <rhel_version>, specify the value that corresponds to the version of Red Hat Enterprise Linux (RHEL) that the host uses. If no value is specified, ccoctl.rhel8 is used by default. The following values are valid:
rhel8: Specify this value for hosts that use RHEL 8.
rhel9: Specify this value for hosts that use RHEL 9.
Change the permissions to make ccoctl executable by running the following command:
```
$ chmod 775 ccoctl.<rhel_version>
```

Verification

To verify that ccoctl is ready to use, display the help file. Use a relative file name when you run the command, for example:

$ ./ccoctl.rhel9

Example output

OpenShift credentials provisioning tool

Usage:
  ccoctl [command]

Available Commands:
  aws          Manage credentials objects for AWS cloud
  azure        Manage credentials objects for Azure
  gcp          Manage credentials objects for Google cloud
  help         Help about any command
  ibmcloud     Manage credentials objects for {ibm-cloud-title}
  nutanix      Manage credentials objects for Nutanix

Flags:
  -h, --help   help for ccoctl

Use "ccoctl [command] --help" for more information about a command.

3.4.4.2.2. Creating AWS resources with the Cloud Credential Operator utility

You have the following options when creating AWS resources:

You can use the ccoctl aws create-all command to create the AWS resources automatically. This is the quickest way to create the resources. See Creating AWS resources with a single command.
If you need to review the JSON files that the ccoctl tool creates before modifying AWS resources, or if the process the ccoctl tool uses to create AWS resources automatically does not meet the requirements of your organization, you can create the AWS resources individually. See Creating AWS resources individually.

3.4.4.2.2.1. Creating AWS resources with a single command

If the process the ccoctl tool uses to create AWS resources automatically meets the requirements of your organization, you can use the ccoctl aws create-all command to automate the creation of AWS resources.

Otherwise, you can create the AWS resources individually. For more information, see "Creating AWS resources individually".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Prerequisites

You must have:

Extracted and prepared the ccoctl binary.

Procedure

Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image by running the following command:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
1
The --included parameter includes only the manifests that your specific cluster configuration requires.
2
Specify the location of the install-config.yaml file.
3
Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
Note
This command might take a few moments to run.
Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-all \
  --name=<name> \1
  --region=<aws_region> \2
  --credentials-requests-dir=<path_to_credentials_requests_directory> \3
  --output-dir=<path_to_ccoctl_output_dir> \4
  --create-private-s3-bucket 5
```
1
Specify the name used to tag any cloud resources that are created for tracking.
2
Specify the AWS region in which cloud resources will be created.
3
Specify the directory containing the files for the component CredentialsRequest objects.
4
Optional: Specify the directory in which you want the ccoctl utility to create objects. By default, the utility creates objects in the directory in which the commands are run.
5
Optional: By default, the ccoctl utility stores the OpenID Connect (OIDC) configuration files in a public S3 bucket and uses the S3 URL as the public OIDC endpoint. To store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL instead, use the --create-private-s3-bucket parameter.
Note
If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.4.4.2.2.2. Creating AWS resources individually

You can use the ccoctl tool to create AWS resources individually. This option might be useful for an organization that shares the responsibility for creating these resources among different users or departments.

Otherwise, you can use the ccoctl aws create-all command to create the AWS resources automatically. For more information, see "Creating AWS resources with a single command".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Some ccoctl commands make AWS API calls to create or modify AWS resources. You can use the --dry-run flag to avoid making API calls. Using this flag creates JSON files on the local file system instead. You can review and modify the JSON files and then apply them with the AWS CLI tool using the --cli-input-json parameters.

Prerequisites

Extract and prepare the ccoctl binary.

Procedure

Generate the public and private RSA key files that are used to set up the OpenID Connect provider for the cluster by running the following command:
```
$ ccoctl aws create-key-pair
```
Example output
```
2021/04/13 11:01:02 Generating RSA keypair
2021/04/13 11:01:03 Writing private key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.private
2021/04/13 11:01:03 Writing public key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.public
2021/04/13 11:01:03 Copying signing key for use by installer
```
where serviceaccount-signer.private and serviceaccount-signer.public are the generated key files.
This command also creates a private key that the cluster requires during installation in /<path_to_ccoctl_output_dir>/tls/bound-service-account-signing-key.key.
Create an OpenID Connect identity provider and S3 bucket on AWS by running the following command:
```
$ ccoctl aws create-identity-provider \
  --name=<name> \1
  --region=<aws_region> \2
  --public-key-file=<path_to_ccoctl_output_dir>/serviceaccount-signer.public 3
```
1
<name> is the name used to tag any cloud resources that are created for tracking.
2
<aws-region> is the AWS region in which cloud resources will be created.
3
<path_to_ccoctl_output_dir> is the path to the public key file that the ccoctl aws create-key-pair command generated.
Example output
```
2021/04/13 11:16:09 Bucket <name>-oidc created
2021/04/13 11:16:10 OpenID Connect discovery document in the S3 bucket <name>-oidc at .well-known/openid-configuration updated
2021/04/13 11:16:10 Reading public key
2021/04/13 11:16:10 JSON web key set (JWKS) in the S3 bucket <name>-oidc at keys.json updated
2021/04/13 11:16:18 Identity Provider created with ARN: arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
where openid-configuration is a discovery document and keys.json is a JSON web key set file.
This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/cluster-authentication-02-config.yaml. This file sets the issuer URL field for the service account tokens that the cluster generates, so that the AWS IAM identity provider trusts the tokens.
Create IAM roles for each component in the cluster:
1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
2. Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
  1
  The --included parameter includes only the manifests that your specific cluster configuration requires.
  2
  Specify the location of the install-config.yaml file.
  3
  Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-iam-roles \
  --name=<name> \
  --region=<aws_region> \
  --credentials-requests-dir=<path_to_credentials_requests_directory> \
  --identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
  Note
  For AWS environments that use alternative IAM API endpoints, such as GovCloud, you must also specify your region with the --region parameter.
  If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.
  For each CredentialsRequest object, ccoctl creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy as defined in each CredentialsRequest object from the OpenShift Container Platform release image.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.4.4.2.3. Incorporating the Cloud Credential Operator utility manifests

To implement short-term security credentials managed outside the cluster for individual components, you must move the manifest files that the Cloud Credential Operator utility (ccoctl) created to the correct directories for the installation program.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have configured the Cloud Credential Operator utility (ccoctl).
You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:
```
$ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/
```
Copy the tls directory that contains the private key to the installation directory:
```
$ cp -a /<path_to_ccoctl_output_dir>/tls .
```

3.4.5. Cluster Network Operator configuration

The configuration for the cluster network is specified as part of the Cluster Network Operator (CNO) configuration and stored in a custom resource (CR) object that is named cluster. The CR specifies the fields for the Network API in the operator.openshift.io API group.

The CNO configuration inherits the following fields during cluster installation from the Network API in the Network.config.openshift.io API group:

clusterNetwork: IP address pools from which pod IP addresses are allocated.
serviceNetwork: IP address pool for services.
defaultNetwork.type: Cluster network plugin. OVNKubernetes is the only supported plugin during installation.

You can specify the cluster network plugin configuration for your cluster by setting the fields for the defaultNetwork object in the CNO object named cluster.

3.4.5.1. Cluster Network Operator configuration object

The fields for the Cluster Network Operator (CNO) are described in the following table:

Table 3.3. Cluster Network Operator configuration object
Field	Type	Description
`metadata.name`	`string`	The name of the CNO object. This name is always `cluster`.
`spec.clusterNetwork`	`array`	A list specifying the blocks of IP addresses from which pod IP addresses are allocated and the subnet prefix length assigned to each individual node in the cluster. For example: spec: clusterNetwork: - cidr: 10.128.0.0/19 hostPrefix: 23 - cidr: 10.128.32.0/19 hostPrefix: 23
`spec.serviceNetwork`	`array`	A block of IP addresses for services. The OVN-Kubernetes network plugin supports only a single IP address block for the service network. For example: spec: serviceNetwork: - 172.30.0.0/14 You can customize this field only in the `install-config.yaml` file before you create the manifests. The value is read-only in the manifest file.
`spec.defaultNetwork`	`object`	Configures the network plugin for the cluster network.
`spec.kubeProxyConfig`	`object`	The fields for this object specify the kube-proxy configuration. If you are using the OVN-Kubernetes cluster network plugin, the kube-proxy configuration has no effect.

defaultNetwork object configuration

The values for the defaultNetwork object are defined in the following table:

Table 3.4. defaultNetwork object
Field	Type	Description
`type`	`string`	`OVNKubernetes`. The Red Hat OpenShift Networking network plugin is selected during installation. This value cannot be changed after cluster installation. Note OpenShift Container Platform uses the OVN-Kubernetes network plugin by default. OpenShift SDN is no longer available as an installation choice for new clusters.
`ovnKubernetesConfig`	`object`	This object is only valid for the OVN-Kubernetes network plugin.

Configuration for the OVN-Kubernetes network plugin

The following table describes the configuration fields for the OVN-Kubernetes network plugin:

Table 3.5. ovnKubernetesConfig object
Field	Type	Description
`mtu`	`integer`	The maximum transmission unit (MTU) for the Geneve (Generic Network Virtualization Encapsulation) overlay network. This is detected automatically based on the MTU of the primary network interface. You do not normally need to override the detected MTU. If the auto-detected value is not what you expect it to be, confirm that the MTU on the primary network interface on your nodes is correct. You cannot use this option to change the MTU value of the primary network interface on the nodes. If your cluster requires different MTU values for different nodes, you must set this value to `100` less than the lowest MTU value in your cluster. For example, if some nodes in your cluster have an MTU of `9001`, and some have an MTU of `1500`, you must set this value to `1400`.
`genevePort`	`integer`	The port to use for all Geneve packets. The default value is `6081`. This value cannot be changed after cluster installation.
`ipsecConfig`	`object`	Specify a configuration object for customizing the IPsec configuration.
`ipv4`	`object`	Specifies a configuration object for IPv4 settings.
`ipv6`	`object`	Specifies a configuration object for IPv6 settings.
`policyAuditConfig`	`object`	Specify a configuration object for customizing network policy audit logging. If unset, the defaults audit log settings are used.
`gatewayConfig`	`object`	Optional: Specify a configuration object for customizing how egress traffic is sent to the node gateway. Note While migrating egress traffic, you can expect some disruption to workloads and service traffic until the Cluster Network Operator (CNO) successfully rolls out the changes.

Table 3.6. ovnKubernetesConfig.ipv4 object
Field	Type	Description
`internalTransitSwitchSubnet`	string	If your existing network infrastructure overlaps with the `100.88.0.0/16` IPv4 subnet, you can specify a different IP address range for internal use by OVN-Kubernetes. The subnet for the distributed transit switch that enables east-west traffic. This subnet cannot overlap with any other subnets used by OVN-Kubernetes or on the host itself. It must be large enough to accommodate one IP address per node in your cluster. The default value is `100.88.0.0/16`.
`internalJoinSubnet`	string	If your existing network infrastructure overlaps with the `100.64.0.0/16` IPv4 subnet, you can specify a different IP address range for internal use by OVN-Kubernetes. You must ensure that the IP address range does not overlap with any other subnet used by your OpenShift Container Platform installation. The IP address range must be larger than the maximum number of nodes that can be added to the cluster. For example, if the `clusterNetwork.cidr` value is `10.128.0.0/14` and the `clusterNetwork.hostPrefix` value is `/23`, then the maximum number of nodes is `2^(23-14)=512`. The default value is `100.64.0.0/16`.

Table 3.7. ovnKubernetesConfig.ipv6 object
Field	Type	Description
`internalTransitSwitchSubnet`	string	If your existing network infrastructure overlaps with the `fd97::/64` IPv6 subnet, you can specify a different IP address range for internal use by OVN-Kubernetes. The subnet for the distributed transit switch that enables east-west traffic. This subnet cannot overlap with any other subnets used by OVN-Kubernetes or on the host itself. It must be large enough to accommodate one IP address per node in your cluster. The default value is `fd97::/64`.
`internalJoinSubnet`	string	If your existing network infrastructure overlaps with the `fd98::/64` IPv6 subnet, you can specify a different IP address range for internal use by OVN-Kubernetes. You must ensure that the IP address range does not overlap with any other subnet used by your OpenShift Container Platform installation. The IP address range must be larger than the maximum number of nodes that can be added to the cluster. The default value is `fd98::/64`.

Table 3.8. policyAuditConfig object
Field	Type	Description
`rateLimit`	integer	The maximum number of messages to generate every second per node. The default value is `20` messages per second.
`maxFileSize`	integer	The maximum size for the audit log in bytes. The default value is `50000000` or 50 MB.
`maxLogFiles`	integer	The maximum number of log files that are retained.
`destination`	string	One of the following additional audit log targets: `libc` The libc `syslog()` function of the journald process on the host. `udp:<host>:<port>` A syslog server. Replace `<host>:<port>` with the host and port of the syslog server. `unix:<file>` A Unix Domain Socket file specified by `<file>`. `null` Do not send the audit logs to any additional target.
`syslogFacility`	string	The syslog facility, such as `kern`, as defined by RFC5424. The default value is `local0`.

Table 3.9. gatewayConfig object
Field	Type	Description
`routingViaHost`	`boolean`	Set this field to `true` to send egress traffic from pods to the host networking stack. For highly-specialized installations and applications that rely on manually configured routes in the kernel routing table, you might want to route egress traffic to the host networking stack. By default, egress traffic is processed in OVN to exit the cluster and is not affected by specialized routes in the kernel routing table. The default value is `false`. This field has an interaction with the Open vSwitch hardware offloading feature. If you set this field to `true`, you do not receive the performance benefits of the offloading because egress traffic is processed by the host networking stack.
`ipForwarding`	`object`	You can control IP forwarding for all traffic on OVN-Kubernetes managed interfaces by using the `ipForwarding` specification in the `Network` resource. Specify `Restricted` to only allow IP forwarding for Kubernetes related traffic. Specify `Global` to allow forwarding of all IP traffic. For new installations, the default is `Restricted`. For updates to OpenShift Container Platform 4.14 or later, the default is `Global`.
`ipv4`	`object`	Optional: Specify an object to configure the internal OVN-Kubernetes masquerade address for host to service traffic for IPv4 addresses.
`ipv6`	`object`	Optional: Specify an object to configure the internal OVN-Kubernetes masquerade address for host to service traffic for IPv6 addresses.

Table 3.10. gatewayConfig.ipv4 object
Field	Type	Description
`internalMasqueradeSubnet`	`string`	The masquerade IPv4 addresses that are used internally to enable host to service traffic. The host is configured with these IP addresses as well as the shared gateway bridge interface. The default value is `169.254.169.0/29`. Important For OpenShift Container Platform 4.17 and later versions, clusters use `169.254.0.0/17` as the default masquerade subnet. For upgraded clusters, there is no change to the default masquerade subnet.

Table 3.11. gatewayConfig.ipv6 object
Field	Type	Description
`internalMasqueradeSubnet`	`string`	The masquerade IPv6 addresses that are used internally to enable host to service traffic. The host is configured with these IP addresses as well as the shared gateway bridge interface. The default value is `fd69::/125`. Important For OpenShift Container Platform 4.17 and later versions, clusters use `fd69::/112` as the default masquerade subnet. For upgraded clusters, there is no change to the default masquerade subnet.

Table 3.12. ipsecConfig object
Field	Type	Description
`mode`	`string`	Specifies the behavior of the IPsec implementation. Must be one of the following values: `Disabled`: IPsec is not enabled on cluster nodes. `External`: IPsec is enabled for network traffic with external hosts. `Full`: IPsec is enabled for pod traffic and network traffic with external hosts.

Example OVN-Kubernetes configuration with IPSec enabled

defaultNetwork:
  type: OVNKubernetes
  ovnKubernetesConfig:
    mtu: 1400
    genevePort: 6081
      ipsecConfig:
        mode: Full

3.4.6. Specifying advanced network configuration

You can use advanced network configuration for your network plugin to integrate your cluster into your existing network environment.

You can specify advanced network configuration only before you install the cluster.

Important

Customizing your network configuration by modifying the OpenShift Container Platform manifest files created by the installation program is not supported. Applying a manifest file that you create, as in the following procedure, is supported.

Prerequisites

You have created the install-config.yaml file and completed any modifications to it.

Procedure

Change to the directory that contains the installation program and create the manifests:
```
$ ./openshift-install create manifests --dir <installation_directory> 1
```
1
<installation_directory> specifies the name of the directory that contains the install-config.yaml file for your cluster.
Create a stub manifest file for the advanced network configuration that is named cluster-network-03-config.yml in the <installation_directory>/manifests/ directory:
```
apiVersion: operator.openshift.io/v1
kind: Network
metadata:
  name: cluster
spec:
```
Specify the advanced network configuration for your cluster in the cluster-network-03-config.yml file, such as in the following example:
Enable IPsec for the OVN-Kubernetes network provider
```
apiVersion: operator.openshift.io/v1
kind: Network
metadata:
  name: cluster
spec:
  defaultNetwork:
    ovnKubernetesConfig:
      ipsecConfig:
        mode: Full
```
Optional: Back up the manifests/cluster-network-03-config.yml file. The installation program consumes the manifests/ directory when you create the Ignition config files.

Note

For more information on using a Network Load Balancer (NLB) on AWS, see Configuring Ingress cluster traffic on AWS using a Network Load Balancer.

3.4.7. Configuring an Ingress Controller Network Load Balancer on a new AWS cluster

You can create an Ingress Controller backed by an AWS Network Load Balancer (NLB) on a new cluster.

Prerequisites

Create the install-config.yaml file and complete any modifications to it.

Procedure

Create an Ingress Controller backed by an AWS NLB on a new cluster.

Change to the directory that contains the installation program and create the manifests:
```
$ ./openshift-install create manifests --dir <installation_directory> 1
```
1
For <installation_directory>, specify the name of the directory that contains the install-config.yaml file for your cluster.
Create a file that is named cluster-ingress-default-ingresscontroller.yaml in the <installation_directory>/manifests/ directory:
```
$ touch <installation_directory>/manifests/cluster-ingress-default-ingresscontroller.yaml 1
```
1
For <installation_directory>, specify the directory name that contains the manifests/ directory for your cluster.
After creating the file, several network configuration files are in the manifests/ directory, as shown:
```
$ ls <installation_directory>/manifests/cluster-ingress-default-ingresscontroller.yaml
```
Example output
```
cluster-ingress-default-ingresscontroller.yaml
```

Open the cluster-ingress-default-ingresscontroller.yaml file in an editor and enter a custom resource (CR) that describes the Operator configuration you want:

apiVersion: operator.openshift.io/v1
kind: IngressController
metadata:
  creationTimestamp: null
  name: default
  namespace: openshift-ingress-operator
spec:
  endpointPublishingStrategy:
    loadBalancer:
      scope: External
      providerParameters:
        type: AWS
        aws:
          type: NLB
    type: LoadBalancerService

Save the cluster-ingress-default-ingresscontroller.yaml file and quit the text editor.
Optional: Back up the manifests/cluster-ingress-default-ingresscontroller.yaml file. The installation program deletes the manifests/ directory when creating the cluster.

3.4.8. Configuring hybrid networking with OVN-Kubernetes

You can configure your cluster to use hybrid networking with the OVN-Kubernetes network plugin. This allows a hybrid cluster that supports different node networking configurations.

Note

This configuration is necessary to run both Linux and Windows nodes in the same cluster.

Prerequisites

You defined OVNKubernetes for the networking.networkType parameter in the install-config.yaml file. See the installation documentation for configuring OpenShift Container Platform network customizations on your chosen cloud provider for more information.

Procedure

Change to the directory that contains the installation program and create the manifests:
```
$ ./openshift-install create manifests --dir <installation_directory>
```
where:
<installation_directory>
Specifies the name of the directory that contains the install-config.yaml file for your cluster.
Create a stub manifest file for the advanced network configuration that is named cluster-network-03-config.yml in the <installation_directory>/manifests/ directory:
```
$ cat <<EOF > <installation_directory>/manifests/cluster-network-03-config.yml
apiVersion: operator.openshift.io/v1
kind: Network
metadata:
  name: cluster
spec:
EOF
```
where:
<installation_directory>
Specifies the directory name that contains the manifests/ directory for your cluster.
Open the cluster-network-03-config.yml file in an editor and configure OVN-Kubernetes with hybrid networking, as in the following example:
Specify a hybrid networking configuration
```
apiVersion: operator.openshift.io/v1
kind: Network
metadata:
  name: cluster
spec:
  defaultNetwork:
    ovnKubernetesConfig:
      hybridOverlayConfig:
        hybridClusterNetwork: 1
        - cidr: 10.132.0.0/14
          hostPrefix: 23
        hybridOverlayVXLANPort: 9898 2
```
1
Specify the CIDR configuration used for nodes on the additional overlay network. The hybridClusterNetwork CIDR must not overlap with the clusterNetwork CIDR.
2
Specify a custom VXLAN port for the additional overlay network. This is required for running Windows nodes in a cluster installed on vSphere, and must not be configured for any other cloud provider. The custom port can be any open port excluding the default 4789 port. For more information on this requirement, see the Microsoft documentation on Pod-to-pod connectivity between hosts is broken.
Note
Windows Server Long-Term Servicing Channel (LTSC): Windows Server 2019 is not supported on clusters with a custom hybridOverlayVXLANPort value because this Windows server version does not support selecting a custom VXLAN port.
Save the cluster-network-03-config.yml file and quit the text editor.
Optional: Back up the manifests/cluster-network-03-config.yml file. The installation program deletes the manifests/ directory when creating the cluster.

Note

For more information about using Linux and Windows nodes in the same cluster, see Understanding Windows container workloads.

3.4.9. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.4.10. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.4.11. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

See Accessing the web console for more details about accessing and understanding the OpenShift Container Platform web console.

3.4.12. Next steps

Validating an installation.
Customize your cluster.
If necessary, you can opt out of remote health reporting.
If necessary, you can remove cloud provider credentials.

3.5. Installing a cluster on AWS in a restricted network

In OpenShift Container Platform version 4.17, you can install a cluster on Amazon Web Services (AWS) in a restricted network by creating an internal mirror of the installation release content on an existing Amazon Virtual Private Cloud (VPC).

3.5.1. Prerequisites

You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You mirrored the images for a disconnected installation to your registry and obtained the imageContentSources data for your version of OpenShift Container Platform.
Important
Because the installation media is on the mirror host, you can use that computer to complete all installation steps.
You have an existing VPC in AWS. When installing to a restricted network using installer-provisioned infrastructure, you cannot use the installer-provisioned VPC. You must use a user-provisioned VPC that satisfies one of the following requirements:
- Contains the mirror registry
- Has firewall rules or a peering connection to access the mirror registry hosted elsewhere
You configured an AWS account to host the cluster.
Important
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use key-based, long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
You downloaded the AWS CLI and installed it on your computer. See Install the AWS CLI Using the Bundled Installer (Linux, macOS, or UNIX) in the AWS documentation.
If you use a firewall and plan to use the Telemetry service, you configured the firewall to allow the sites that your cluster requires access to.
Note
If you are configuring a proxy, be sure to also review this site list.

3.5.2. About installations in restricted networks

In OpenShift Container Platform 4.17, you can perform an installation that does not require an active connection to the internet to obtain software components. Restricted network installations can be completed using installer-provisioned infrastructure or user-provisioned infrastructure, depending on the cloud platform to which you are installing the cluster.

If you choose to perform a restricted network installation on a cloud platform, you still require access to its cloud APIs. Some cloud functions, like Amazon Web Service’s Route 53 DNS and IAM services, require internet access. Depending on your network, you might require less internet access for an installation on bare metal hardware, Nutanix, or on VMware vSphere.

To complete a restricted network installation, you must create a registry that mirrors the contents of the OpenShift image registry and contains the installation media. You can create this registry on a mirror host, which can access both the internet and your closed network, or by using other methods that meet your restrictions.

3.5.2.1. Additional limits

Clusters in restricted networks have the following additional limitations and restrictions:

The ClusterVersion status includes an Unable to retrieve available updates error.
By default, you cannot use the contents of the Developer Catalog because you cannot access the required image stream tags.

3.5.3. About using a custom VPC

In OpenShift Container Platform 4.17, you can deploy a cluster into existing subnets in an existing Amazon Virtual Private Cloud (VPC) in Amazon Web Services (AWS). By deploying OpenShift Container Platform into an existing AWS VPC, you might be able to avoid limit constraints in new accounts or more easily abide by the operational constraints that your company’s guidelines set. If you cannot obtain the infrastructure creation permissions that are required to create the VPC yourself, use this installation option.

Because the installation program cannot know what other components are also in your existing subnets, it cannot choose subnet CIDRs and so forth on your behalf. You must configure networking for the subnets that you install your cluster to yourself.

3.5.3.1. Requirements for using your VPC

The installation program no longer creates the following components:

Internet gateways
NAT gateways
Subnets
Route tables
VPCs
VPC DHCP options
VPC endpoints

Note

The installation program requires that you use the cloud-provided DNS server. Using a custom DNS server is not supported and causes the installation to fail.

If you use a custom VPC, you must correctly configure it and its subnets for the installation program and the cluster to use. See Create a VPC in the Amazon Web Services documentation for more information about AWS VPC console wizard configurations and creating and managing an AWS VPC.

The installation program cannot:

Subdivide network ranges for the cluster to use.
Set route tables for the subnets.
Set VPC options like DHCP.

You must complete these tasks before you install the cluster. See VPC networking components and Route tables for your VPC for more information on configuring networking in an AWS VPC.

Your VPC must meet the following characteristics:

The VPC must not use the kubernetes.io/cluster/.*: owned, Name, and openshift.io/cluster tags.
The installation program modifies your subnets to add the kubernetes.io/cluster/.*: shared tag, so your subnets must have at least one free tag slot available for it. See Tag Restrictions in the AWS documentation to confirm that the installation program can add a tag to each subnet that you specify. You cannot use a Name tag, because it overlaps with the EC2 Name field and the installation fails.
If you want to extend your OpenShift Container Platform cluster into an AWS Outpost and have an existing Outpost subnet, the existing subnet must use the kubernetes.io/cluster/unmanaged: true tag. If you do not apply this tag, the installation might fail due to the Cloud Controller Manager creating a service load balancer in the Outpost subnet, which is an unsupported configuration.
You must enable the enableDnsSupport and enableDnsHostnames attributes in your VPC, so that the cluster can use the Route 53 zones that are attached to the VPC to resolve cluster’s internal DNS records. See DNS Support in Your VPC in the AWS documentation.
If you prefer to use your own Route 53 hosted private zone, you must associate the existing hosted zone with your VPC prior to installing a cluster. You can define your hosted zone using the platform.aws.hostedZone and platform.aws.hostedZoneRole fields in the install-config.yaml file. You can use a private hosted zone from another account by sharing it with the account where you install the cluster. If you use a private hosted zone from another account, you must use the Passthrough or Manual credentials mode.

If you are working in a disconnected environment, you are unable to reach the public IP addresses for EC2, ELB, and S3 endpoints. Depending on the level to which you want to restrict internet traffic during the installation, the following configuration options are available:

Option 1: Create VPC endpoints

Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

With this option, network traffic remains private between your VPC and the required AWS services.

Option 2: Create a proxy without VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy. With this option, internet traffic goes through the proxy to reach the required AWS services.

Option 3: Create a proxy with VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy with VPC endpoints. Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

When configuring the proxy in the install-config.yaml file, add these endpoints to the noProxy field. With this option, the proxy prevents the cluster from accessing the internet directly. However, network traffic remains private between your VPC and the required AWS services.

Required VPC components

You must provide a suitable VPC and subnets that allow communication to your machines.

Component	AWS type	Description
VPC	`AWS::EC2::VPC` `AWS::EC2::VPCEndpoint`	You must provide a public VPC for the cluster to use. The VPC uses an endpoint that references the route tables for each subnet to improve communication with the registry that is hosted in S3.
Public subnets	`AWS::EC2::Subnet` `AWS::EC2::SubnetNetworkAclAssociation`	Your VPC must have public subnets for between 1 and 3 availability zones and associate them with appropriate Ingress rules.
Internet gateway	`AWS::EC2::InternetGateway` `AWS::EC2::VPCGatewayAttachment` `AWS::EC2::RouteTable` `AWS::EC2::Route` `AWS::EC2::SubnetRouteTableAssociation` `AWS::EC2::NatGateway` `AWS::EC2::EIP`	You must have a public internet gateway, with public routes, attached to the VPC. In the provided templates, each public subnet has a NAT gateway with an EIP address. These NAT gateways allow cluster resources, like private subnet instances, to reach the internet and are not required for some restricted network or proxy scenarios.
Network access control	`AWS::EC2::NetworkAcl` `AWS::EC2::NetworkAclEntry`	You must allow the VPC to access the following ports:
		Port	Reason
		`80`	Inbound HTTP traffic
		`443`	Inbound HTTPS traffic
		`22`	Inbound SSH traffic
		`1024` - `65535`	Inbound ephemeral traffic
		`0` - `65535`	Outbound ephemeral traffic
Private subnets	`AWS::EC2::Subnet` `AWS::EC2::RouteTable` `AWS::EC2::SubnetRouteTableAssociation`	Your VPC can have private subnets. The provided CloudFormation templates can create private subnets for between 1 and 3 availability zones. If you use private subnets, you must provide appropriate routes and tables for them.

3.5.3.2. VPC validation

To ensure that the subnets that you provide are suitable, the installation program confirms the following data:

All the subnets that you specify exist.
You provide private subnets.
The subnet CIDRs belong to the machine CIDR that you specified.
You provide subnets for each availability zone. Each availability zone contains no more than one public and one private subnet. If you use a private cluster, provide only a private subnet for each availability zone. Otherwise, provide exactly one public and private subnet for each availability zone.
You provide a public subnet for each private subnet availability zone. Machines are not provisioned in availability zones that you do not provide private subnets for.

If you destroy a cluster that uses an existing VPC, the VPC is not deleted. When you remove the OpenShift Container Platform cluster from a VPC, the kubernetes.io/cluster/.*: shared tag is removed from the subnets that it used.

3.5.3.3. Division of permissions

Starting with OpenShift Container Platform 4.3, you do not need all of the permissions that are required for an installation program-provisioned infrastructure cluster to deploy a cluster. This change mimics the division of permissions that you might have at your company: some individuals can create different resource in your clouds than others. For example, you might be able to create application-specific items, like instances, buckets, and load balancers, but not networking-related components such as VPCs, subnets, or ingress rules.

The AWS credentials that you use when you create your cluster do not need the networking permissions that are required to make VPCs and core networking components within the VPC, such as subnets, routing tables, internet gateways, NAT, and VPN. You still need permission to make the application resources that the machines within the cluster require, such as ELBs, security groups, S3 buckets, and nodes.

3.5.3.4. Isolation between clusters

If you deploy OpenShift Container Platform to an existing network, the isolation of cluster services is reduced in the following ways:

You can install multiple OpenShift Container Platform clusters in the same VPC.
ICMP ingress is allowed from the entire network.
TCP 22 ingress (SSH) is allowed to the entire network.
Control plane TCP 6443 ingress (Kubernetes API) is allowed to the entire network.
Control plane TCP 22623 ingress (MCS) is allowed to the entire network.

3.5.4. Creating the installation configuration file

You can customize the OpenShift Container Platform cluster you install on Amazon Web Services (AWS).

Prerequisites

You have the OpenShift Container Platform installation program and the pull secret for your cluster. For a restricted network installation, these files are on your mirror host.
You have the imageContentSources values that were generated during mirror registry creation.
You have obtained the contents of the certificate for your mirror registry.

Procedure

Create the install-config.yaml file.
1. Change to the directory that contains the installation program and run the following command:
```
$ ./openshift-install create install-config --dir <installation_directory> 1
```
  1
  For <installation_directory>, specify the directory name to store the files that the installation program creates.
  When specifying the directory:
  - Verify that the directory has the execute permission. This permission is required to run Terraform binaries under the installation directory.
  - Use an empty directory. Some installation assets, such as bootstrap X.509 certificates, have short expiration intervals, therefore you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
2. At the prompts, provide the configuration details for your cloud:
  1. Optional: Select an SSH key to use to access your cluster machines.
    Note
    For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
  2. Select AWS as the platform to target.
  3. If you do not have an Amazon Web Services (AWS) profile stored on your computer, enter the AWS access key ID and secret access key for the user that you configured to run the installation program.
  4. Select the AWS region to deploy the cluster to.
  5. Select the base domain for the Route 53 service that you configured for your cluster.
  6. Enter a descriptive name for your cluster.
Edit the install-config.yaml file to give the additional information that is required for an installation in a restricted network.
1. Update the pullSecret value to contain the authentication information for your registry:
```
pullSecret: '{"auths":{"<mirror_host_name>:5000": {"auth": "<credentials>","email": "you@example.com"}}}'
```
  For <mirror_host_name>, specify the registry domain name that you specified in the certificate for your mirror registry, and for <credentials>, specify the base64-encoded user name and password for your mirror registry.
2. Add the additionalTrustBundle parameter and value.
```
additionalTrustBundle: |
  -----BEGIN CERTIFICATE-----
  ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
  -----END CERTIFICATE-----
```
  The value must be the contents of the certificate file that you used for your mirror registry. The certificate file can be an existing, trusted certificate authority, or the self-signed certificate that you generated for the mirror registry.
3. Define the subnets for the VPC to install the cluster in:
```
subnets:
- subnet-1
- subnet-2
- subnet-3
```
4. Add the image content resources, which resemble the following YAML excerpt:
```
imageContentSources:
- mirrors:
  - <mirror_host_name>:5000/<repo_name>/release
  source: quay.io/openshift-release-dev/ocp-release
- mirrors:
  - <mirror_host_name>:5000/<repo_name>/release
  source: registry.redhat.io/ocp/release
```
  For these values, use the imageContentSources that you recorded during mirror registry creation.
5. Optional: Set the publishing strategy to Internal:
```
publish: Internal
```
  By setting this option, you create an internal Ingress Controller and a private load balancer.
Make any other modifications to the install-config.yaml file that you require.
For more information about the parameters, see "Installation configuration parameters".
Back up the install-config.yaml file so that you can use it to install multiple clusters.
Important
The install-config.yaml file is consumed during the installation process. If you want to reuse the file, you must back it up now.

Additional resources

Installation configuration parameters for AWS

3.5.4.1. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.13. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

Additional resources

Optimizing storage

3.5.4.2. Sample customized install-config.yaml file for AWS

You can customize the installation configuration file (install-config.yaml) to specify more details about your OpenShift Container Platform cluster’s platform or modify the values of the required parameters.

Important

This sample YAML file is provided for reference only. You must obtain your install-config.yaml file by using the installation program and modify it.

apiVersion: v1
baseDomain: example.com 1
credentialsMode: Mint 2
controlPlane: 3 4
  hyperthreading: Enabled 5
  name: master
  platform:
    aws:
      zones:
      - us-west-2a
      - us-west-2b
      rootVolume:
        iops: 4000
        size: 500
        type: io1 6
      metadataService:
        authentication: Optional 7
      type: m6i.xlarge
  replicas: 3
compute: 8
- hyperthreading: Enabled 9
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1 10
      metadataService:
        authentication: Optional 11
      type: c5.4xlarge
      zones:
      - us-west-2c
  replicas: 3
metadata:
  name: test-cluster 12
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 13
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: us-west-2 14
    propagateUserTags: true 15
    userTags:
      adminContact: jdoe
      costCenter: 7536
    subnets: 16
    - subnet-1
    - subnet-2
    - subnet-3
    amiID: ami-0c5d3e03c0ab9b19a 17
    serviceEndpoints: 18
      - name: ec2
        url: https://vpce-id.ec2.us-west-2.vpce.amazonaws.com
    hostedZone: Z3URY6TWQ91KVV 19
fips: false 20
sshKey: ssh-ed25519 AAAA... 21
pullSecret: '{"auths":{"<local_registry>": {"auth": "<credentials>","email": "you@example.com"}}}' 22
additionalTrustBundle: | 23
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
imageContentSources: 24
- mirrors:
  - <local_registry>/<local_repository_name>/release
  source: quay.io/openshift-release-dev/ocp-release
- mirrors:
  - <local_registry>/<local_repository_name>/release
  source: quay.io/openshift-release-dev/ocp-v4.0-art-dev

1 12 14: Required. The installation program prompts you for this value.
2: Optional: Add this parameter to force the Cloud Credential Operator (CCO) to use the specified mode. By default, the CCO uses the root credentials in the kube-system namespace to dynamically try to determine the capabilities of the credentials. For details about CCO modes, see the "About the Cloud Credential Operator" section in the Authentication and authorization guide.
3 8 15: If you do not provide these parameters and values, the installation program provides the default value.
4: The controlPlane section is a single mapping, but the compute section is a sequence of mappings. To meet the requirements of the different data structures, the first line of the compute section must begin with a hyphen, -, and the first line of the controlPlane section must not. Only one control plane pool is used.
5 9: Whether to enable or disable simultaneous multithreading, or hyperthreading. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to Disabled. If you disable simultaneous multithreading in some cluster machines, you must disable it in all cluster machines.
Important
If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance. Use larger instance types, such as m4.2xlarge or m5.2xlarge, for your machines if you disable simultaneous multithreading.
6 10: To configure faster storage for etcd, especially for larger clusters, set the storage type as io1 and set iops to 2000.
7 11: Whether to require the Amazon EC2 Instance Metadata Service v2 (IMDSv2). To require IMDSv2, set the parameter value to Required. To allow the use of both IMDSv1 and IMDSv2, set the parameter value to Optional. If no value is specified, both IMDSv1 and IMDSv2 are allowed.
Note
The IMDS configuration for control plane machines that is set during cluster installation can only be changed by using the AWS CLI. The IMDS configuration for compute machines can be changed by using compute machine sets.
13: The cluster network plugin to install. The default value OVNKubernetes is the only supported value.
16: If you provide your own VPC, specify subnets for each availability zone that your cluster uses.
17: The ID of the AMI used to boot machines for the cluster. If set, the AMI must belong to the same region as the cluster.
18: The AWS service endpoints. Custom endpoints are required when installing to an unknown AWS region. The endpoint URL must use the https protocol and the host must trust the certificate.
19: The ID of your existing Route 53 private hosted zone. Providing an existing hosted zone requires that you supply your own VPC and the hosted zone is already associated with the VPC prior to installing your cluster. If undefined, the installation program creates a new hosted zone.
20: Whether to enable or disable FIPS mode. By default, FIPS mode is not enabled. If FIPS mode is enabled, the Red Hat Enterprise Linux CoreOS (RHCOS) machines that OpenShift Container Platform runs on bypass the default Kubernetes cryptography suite and use the cryptography modules that are provided with RHCOS instead.
Important
To enable FIPS mode for your cluster, you must run the installation program from a Red Hat Enterprise Linux (RHEL) computer configured to operate in FIPS mode. For more information about configuring FIPS mode on RHEL, see Switching RHEL to FIPS mode.
When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.
21: You can optionally provide the sshKey value that you use to access the machines in your cluster.
Note
For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
22: For <local_registry>, specify the registry domain name, and optionally the port, that your mirror registry uses to serve content. For example registry.example.com or registry.example.com:5000. For <credentials>, specify the base64-encoded user name and password for your mirror registry.
23: Provide the contents of the certificate file that you used for your mirror registry.
24: Provide the imageContentSources section from the output of the command to mirror the repository.

3.5.4.3. Configuring the cluster-wide proxy during installation

Production environments can deny direct access to the internet and instead have an HTTP or HTTPS proxy available. You can configure a new OpenShift Container Platform cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

You have an existing install-config.yaml file.
You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.
Note
The Proxy object status.noProxy field is populated with the values of the networking.machineNetwork[].cidr, networking.clusterNetwork[].cidr, and networking.serviceNetwork[] fields from your installation configuration.
For installations on Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, and Red Hat OpenStack Platform (RHOSP), the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

Edit your install-config.yaml file and add the proxy settings. For example:
```
apiVersion: v1
baseDomain: my.domain.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port> 1
  httpsProxy: https://<username>:<pswd>@<ip>:<port> 2
  noProxy: ec2.<aws_region>.amazonaws.com,elasticloadbalancing.<aws_region>.amazonaws.com,s3.<aws_region>.amazonaws.com 3
additionalTrustBundle: | 4
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> 5
```
1
A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
2
A proxy URL to use for creating HTTPS connections outside the cluster.
3
A comma-separated list of destination domain names, IP addresses, or other network CIDRs to exclude from proxying. Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass the proxy for all destinations. If you have added the Amazon EC2,Elastic Load Balancing, and S3 VPC endpoints to your VPC, you must add these endpoints to the noProxy field.
4
If provided, the installation program generates a config map that is named user-ca-bundle in the openshift-config namespace that contains one or more additional CA certificates that are required for proxying HTTPS connections. The Cluster Network Operator then creates a trusted-ca-bundle config map that merges these contents with the Red Hat Enterprise Linux CoreOS (RHCOS) trust bundle, and this config map is referenced in the trustedCA field of the Proxy object. The additionalTrustBundle field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.
5
Optional: The policy to determine the configuration of the Proxy object to reference the user-ca-bundle config map in the trustedCA field. The allowed values are Proxyonly and Always. Use Proxyonly to reference the user-ca-bundle config map only when http/https proxy is configured. Use Always to always reference the user-ca-bundle config map. The default value is Proxyonly.
Note
The installation program does not support the proxy readinessEndpoints field.
Note
If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:
```
$ ./openshift-install wait-for install-complete --log-level debug
```
Save the file and reference it when installing OpenShift Container Platform.

The installation program creates a cluster-wide proxy that is named cluster that uses the proxy settings in the provided install-config.yaml file. If no proxy settings are provided, a cluster Proxy object is still created, but it will have a nil spec.

Note

Only the Proxy object named cluster is supported, and no additional proxies can be created.

3.5.5. Alternatives to storing administrator-level secrets in the kube-system project

By default, administrator secrets are stored in the kube-system project. If you configured the credentialsMode parameter in the install-config.yaml file to Manual, you must use one of the following alternatives:

To manage long-term cloud credentials manually, follow the procedure in Manually creating long-term credentials.
To implement short-term credentials that are managed outside the cluster for individual components, follow the procedures in Configuring an AWS cluster to use short-term credentials.

3.5.5.1. Manually creating long-term credentials

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```

Extract the list of CredentialsRequest custom resources (CRs) from the OpenShift Container Platform release image by running the following command:

$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3

1: The --included parameter includes only the manifests that your specific cluster configuration requires.
2: Specify the location of the install-config.yaml file.
3: Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

This command creates a YAML file for each CredentialsRequest object.

Sample CredentialsRequest object

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - iam:GetUser
      - iam:GetUserPolicy
      - iam:ListAccessKeys
      resource: "*"
  ...

Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object.

Sample CredentialsRequest object with secrets

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - s3:CreateBucket
      - s3:DeleteBucket
      resource: "*"
      ...
  secretRef:
    name: <component_secret>
    namespace: <component_namespace>
  ...

Sample Secret object

apiVersion: v1
kind: Secret
metadata:
  name: <component_secret>
  namespace: <component_namespace>
data:
  aws_access_key_id: <base64_encoded_aws_access_key_id>
  aws_secret_access_key: <base64_encoded_aws_secret_access_key>

Important

Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

3.5.5.2. Configuring an AWS cluster to use short-term credentials

To install a cluster that is configured to use the AWS Security Token Service (STS), you must configure the CCO utility and create the required AWS resources for your cluster.

3.5.5.2.1. Configuring the Cloud Credential Operator utility

To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.

Note

The ccoctl utility is a Linux binary that must run in a Linux environment.

Prerequisites

You have access to an OpenShift Container Platform account with cluster administrator access.
You have installed the OpenShift CLI (oc).

You have created an AWS account for the ccoctl utility to use with the following permissions:
Example 3.9. Required AWS permissions
Required iam permissions
- iam:CreateOpenIDConnectProvider
- iam:CreateRole
- iam:DeleteOpenIDConnectProvider
- iam:DeleteRole
- iam:DeleteRolePolicy
- iam:GetOpenIDConnectProvider
- iam:GetRole
- iam:GetUser
- iam:ListOpenIDConnectProviders
- iam:ListRolePolicies
- iam:ListRoles
- iam:PutRolePolicy
- iam:TagOpenIDConnectProvider
- iam:TagRole
Required s3 permissions
- s3:CreateBucket
- s3:DeleteBucket
- s3:DeleteObject
- s3:GetBucketAcl
- s3:GetBucketTagging
- s3:GetObject
- s3:GetObjectAcl
- s3:GetObjectTagging
- s3:ListBucket
- s3:PutBucketAcl
- s3:PutBucketPolicy
- s3:PutBucketPublicAccessBlock
- s3:PutBucketTagging
- s3:PutObject
- s3:PutObjectAcl
- s3:PutObjectTagging
Required cloudfront permissions
- cloudfront:ListCloudFrontOriginAccessIdentities
- cloudfront:ListDistributions
- cloudfront:ListTagsForResource
If you plan to store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL, the AWS account that runs the ccoctl utility requires the following additional permissions:
Example 3.10. Additional permissions for a private S3 bucket with CloudFront
- cloudfront:CreateCloudFrontOriginAccessIdentity
- cloudfront:CreateDistribution
- cloudfront:DeleteCloudFrontOriginAccessIdentity
- cloudfront:DeleteDistribution
- cloudfront:GetCloudFrontOriginAccessIdentity
- cloudfront:GetCloudFrontOriginAccessIdentityConfig
- cloudfront:GetDistribution
- cloudfront:TagResource
- cloudfront:UpdateDistribution
Note
These additional permissions support the use of the --create-private-s3-bucket option when processing credentials requests with the ccoctl aws create-all command.

Procedure

Set a variable for the OpenShift Container Platform release image by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
```
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
```
Note
Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.
Extract the ccoctl binary from the CCO container image within the OpenShift Container Platform release image by running the following command:
```
$ oc image extract $CCO_IMAGE \
  --file="/usr/bin/ccoctl.<rhel_version>" \1
  -a ~/.pull-secret
```
1
For <rhel_version>, specify the value that corresponds to the version of Red Hat Enterprise Linux (RHEL) that the host uses. If no value is specified, ccoctl.rhel8 is used by default. The following values are valid:
rhel8: Specify this value for hosts that use RHEL 8.
rhel9: Specify this value for hosts that use RHEL 9.
Change the permissions to make ccoctl executable by running the following command:
```
$ chmod 775 ccoctl.<rhel_version>
```

Verification

To verify that ccoctl is ready to use, display the help file. Use a relative file name when you run the command, for example:

$ ./ccoctl.rhel9

Example output

OpenShift credentials provisioning tool

Usage:
  ccoctl [command]

Available Commands:
  aws          Manage credentials objects for AWS cloud
  azure        Manage credentials objects for Azure
  gcp          Manage credentials objects for Google cloud
  help         Help about any command
  ibmcloud     Manage credentials objects for {ibm-cloud-title}
  nutanix      Manage credentials objects for Nutanix

Flags:
  -h, --help   help for ccoctl

Use "ccoctl [command] --help" for more information about a command.

3.5.5.2.2. Creating AWS resources with the Cloud Credential Operator utility

You have the following options when creating AWS resources:

You can use the ccoctl aws create-all command to create the AWS resources automatically. This is the quickest way to create the resources. See Creating AWS resources with a single command.
If you need to review the JSON files that the ccoctl tool creates before modifying AWS resources, or if the process the ccoctl tool uses to create AWS resources automatically does not meet the requirements of your organization, you can create the AWS resources individually. See Creating AWS resources individually.

3.5.5.2.2.1. Creating AWS resources with a single command

If the process the ccoctl tool uses to create AWS resources automatically meets the requirements of your organization, you can use the ccoctl aws create-all command to automate the creation of AWS resources.

Otherwise, you can create the AWS resources individually. For more information, see "Creating AWS resources individually".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Prerequisites

You must have:

Extracted and prepared the ccoctl binary.

Procedure

Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image by running the following command:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
1
The --included parameter includes only the manifests that your specific cluster configuration requires.
2
Specify the location of the install-config.yaml file.
3
Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
Note
This command might take a few moments to run.
Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-all \
  --name=<name> \1
  --region=<aws_region> \2
  --credentials-requests-dir=<path_to_credentials_requests_directory> \3
  --output-dir=<path_to_ccoctl_output_dir> \4
  --create-private-s3-bucket 5
```
1
Specify the name used to tag any cloud resources that are created for tracking.
2
Specify the AWS region in which cloud resources will be created.
3
Specify the directory containing the files for the component CredentialsRequest objects.
4
Optional: Specify the directory in which you want the ccoctl utility to create objects. By default, the utility creates objects in the directory in which the commands are run.
5
Optional: By default, the ccoctl utility stores the OpenID Connect (OIDC) configuration files in a public S3 bucket and uses the S3 URL as the public OIDC endpoint. To store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL instead, use the --create-private-s3-bucket parameter.
Note
If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.5.5.2.2.2. Creating AWS resources individually

You can use the ccoctl tool to create AWS resources individually. This option might be useful for an organization that shares the responsibility for creating these resources among different users or departments.

Otherwise, you can use the ccoctl aws create-all command to create the AWS resources automatically. For more information, see "Creating AWS resources with a single command".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Some ccoctl commands make AWS API calls to create or modify AWS resources. You can use the --dry-run flag to avoid making API calls. Using this flag creates JSON files on the local file system instead. You can review and modify the JSON files and then apply them with the AWS CLI tool using the --cli-input-json parameters.

Prerequisites

Extract and prepare the ccoctl binary.

Procedure

Generate the public and private RSA key files that are used to set up the OpenID Connect provider for the cluster by running the following command:
```
$ ccoctl aws create-key-pair
```
Example output
```
2021/04/13 11:01:02 Generating RSA keypair
2021/04/13 11:01:03 Writing private key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.private
2021/04/13 11:01:03 Writing public key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.public
2021/04/13 11:01:03 Copying signing key for use by installer
```
where serviceaccount-signer.private and serviceaccount-signer.public are the generated key files.
This command also creates a private key that the cluster requires during installation in /<path_to_ccoctl_output_dir>/tls/bound-service-account-signing-key.key.
Create an OpenID Connect identity provider and S3 bucket on AWS by running the following command:
```
$ ccoctl aws create-identity-provider \
  --name=<name> \1
  --region=<aws_region> \2
  --public-key-file=<path_to_ccoctl_output_dir>/serviceaccount-signer.public 3
```
1
<name> is the name used to tag any cloud resources that are created for tracking.
2
<aws-region> is the AWS region in which cloud resources will be created.
3
<path_to_ccoctl_output_dir> is the path to the public key file that the ccoctl aws create-key-pair command generated.
Example output
```
2021/04/13 11:16:09 Bucket <name>-oidc created
2021/04/13 11:16:10 OpenID Connect discovery document in the S3 bucket <name>-oidc at .well-known/openid-configuration updated
2021/04/13 11:16:10 Reading public key
2021/04/13 11:16:10 JSON web key set (JWKS) in the S3 bucket <name>-oidc at keys.json updated
2021/04/13 11:16:18 Identity Provider created with ARN: arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
where openid-configuration is a discovery document and keys.json is a JSON web key set file.
This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/cluster-authentication-02-config.yaml. This file sets the issuer URL field for the service account tokens that the cluster generates, so that the AWS IAM identity provider trusts the tokens.
Create IAM roles for each component in the cluster:
1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
2. Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
  1
  The --included parameter includes only the manifests that your specific cluster configuration requires.
  2
  Specify the location of the install-config.yaml file.
  3
  Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-iam-roles \
  --name=<name> \
  --region=<aws_region> \
  --credentials-requests-dir=<path_to_credentials_requests_directory> \
  --identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
  Note
  For AWS environments that use alternative IAM API endpoints, such as GovCloud, you must also specify your region with the --region parameter.
  If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.
  For each CredentialsRequest object, ccoctl creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy as defined in each CredentialsRequest object from the OpenShift Container Platform release image.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.5.5.2.3. Incorporating the Cloud Credential Operator utility manifests

To implement short-term security credentials managed outside the cluster for individual components, you must move the manifest files that the Cloud Credential Operator utility (ccoctl) created to the correct directories for the installation program.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have configured the Cloud Credential Operator utility (ccoctl).
You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:
```
$ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/
```
Copy the tls directory that contains the private key to the installation directory:
```
$ cp -a /<path_to_ccoctl_output_dir>/tls .
```

3.5.6. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.5.7. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.5.8. Disabling the default OperatorHub catalog sources

Operator catalogs that source content provided by Red Hat and community projects are configured for OperatorHub by default during an OpenShift Container Platform installation. In a restricted network environment, you must disable the default catalogs as a cluster administrator.

Procedure

Disable the sources for the default catalogs by adding disableAllDefaultSources: true to the OperatorHub object:

$ oc patch OperatorHub cluster --type json \
    -p '[{"op": "add", "path": "/spec/disableAllDefaultSources", "value": true}]'

Tip

Alternatively, you can use the web console to manage catalog sources. From the Administration Cluster Settings Configuration OperatorHub page, click the Sources tab, where you can create, update, delete, disable, and enable individual sources.

3.5.9. Next steps

Validate an installation.
Customize your cluster.
Configure image streams for the Cluster Samples Operator and the must-gather tool.
Learn how to use Operator Lifecycle Manager in disconnected environments.
If the mirror registry that you used to install your cluster has a trusted CA, add it to the cluster by configuring additional trust stores.
If necessary, you can opt out of remote health reporting.

3.6. Installing a cluster on AWS into an existing VPC

In OpenShift Container Platform version 4.17, you can install a cluster into an existing Amazon Virtual Private Cloud (VPC) on Amazon Web Services (AWS). The installation program provisions the rest of the required infrastructure, which you can further customize. To customize the installation, you modify parameters in the install-config.yaml file before you install the cluster.

3.6.1. Prerequisites

You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
If the existing VPC is owned by a different account than the cluster, you shared the VPC between accounts.
Important
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.

3.6.2. About using a custom VPC

In OpenShift Container Platform 4.17, you can deploy a cluster into existing subnets in an existing Amazon Virtual Private Cloud (VPC) in Amazon Web Services (AWS). By deploying OpenShift Container Platform into an existing AWS VPC, you might be able to avoid limit constraints in new accounts or more easily abide by the operational constraints that your company’s guidelines set. If you cannot obtain the infrastructure creation permissions that are required to create the VPC yourself, use this installation option.

Because the installation program cannot know what other components are also in your existing subnets, it cannot choose subnet CIDRs and so forth on your behalf. You must configure networking for the subnets that you install your cluster to yourself.

3.6.2.1. Requirements for using your VPC

The installation program no longer creates the following components:

Internet gateways
NAT gateways
Subnets
Route tables
VPCs
VPC DHCP options
VPC endpoints

Note

The installation program requires that you use the cloud-provided DNS server. Using a custom DNS server is not supported and causes the installation to fail.

If you use a custom VPC, you must correctly configure it and its subnets for the installation program and the cluster to use. See Create a VPC in the Amazon Web Services documentation for more information about AWS VPC console wizard configurations and creating and managing an AWS VPC.

The installation program cannot:

Subdivide network ranges for the cluster to use.
Set route tables for the subnets.
Set VPC options like DHCP.

You must complete these tasks before you install the cluster. See VPC networking components and Route tables for your VPC for more information on configuring networking in an AWS VPC.

Your VPC must meet the following characteristics:

Create a public and private subnet for each availability zone that your cluster uses. Each availability zone can contain no more than one public and one private subnet. For an example of this type of configuration, see VPC with public and private subnets (NAT) in the AWS documentation.
Record each subnet ID. Completing the installation requires that you enter these values in the platform section of the install-config.yaml file. See Finding a subnet ID in the AWS documentation.
The VPC’s CIDR block must contain the Networking.MachineCIDR range, which is the IP address pool for cluster machines. The subnet CIDR blocks must belong to the machine CIDR that you specify.
The VPC must have a public internet gateway attached to it. For each availability zone:
- The public subnet requires a route to the internet gateway.
- The public subnet requires a NAT gateway with an EIP address.
- The private subnet requires a route to the NAT gateway in public subnet.
The VPC must not use the kubernetes.io/cluster/.*: owned, Name, and openshift.io/cluster tags.
The installation program modifies your subnets to add the kubernetes.io/cluster/.*: shared tag, so your subnets must have at least one free tag slot available for it. See Tag Restrictions in the AWS documentation to confirm that the installation program can add a tag to each subnet that you specify. You cannot use a Name tag, because it overlaps with the EC2 Name field and the installation fails.
If you want to extend your OpenShift Container Platform cluster into an AWS Outpost and have an existing Outpost subnet, the existing subnet must use the kubernetes.io/cluster/unmanaged: true tag. If you do not apply this tag, the installation might fail due to the Cloud Controller Manager creating a service load balancer in the Outpost subnet, which is an unsupported configuration.
You must enable the enableDnsSupport and enableDnsHostnames attributes in your VPC, so that the cluster can use the Route 53 zones that are attached to the VPC to resolve cluster’s internal DNS records. See DNS Support in Your VPC in the AWS documentation.
If you prefer to use your own Route 53 hosted private zone, you must associate the existing hosted zone with your VPC prior to installing a cluster. You can define your hosted zone using the platform.aws.hostedZone and platform.aws.hostedZoneRole fields in the install-config.yaml file. You can use a private hosted zone from another account by sharing it with the account where you install the cluster. If you use a private hosted zone from another account, you must use the Passthrough or Manual credentials mode.

If you are working in a disconnected environment, you are unable to reach the public IP addresses for EC2, ELB, and S3 endpoints. Depending on the level to which you want to restrict internet traffic during the installation, the following configuration options are available:

Option 1: Create VPC endpoints

Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

With this option, network traffic remains private between your VPC and the required AWS services.

Option 2: Create a proxy without VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy. With this option, internet traffic goes through the proxy to reach the required AWS services.

Option 3: Create a proxy with VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy with VPC endpoints. Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

When configuring the proxy in the install-config.yaml file, add these endpoints to the noProxy field. With this option, the proxy prevents the cluster from accessing the internet directly. However, network traffic remains private between your VPC and the required AWS services.

Required VPC components

You must provide a suitable VPC and subnets that allow communication to your machines.

Component	AWS type	Description
VPC	`AWS::EC2::VPC` `AWS::EC2::VPCEndpoint`	You must provide a public VPC for the cluster to use. The VPC uses an endpoint that references the route tables for each subnet to improve communication with the registry that is hosted in S3.
Public subnets	`AWS::EC2::Subnet` `AWS::EC2::SubnetNetworkAclAssociation`	Your VPC must have public subnets for between 1 and 3 availability zones and associate them with appropriate Ingress rules.
Internet gateway	`AWS::EC2::InternetGateway` `AWS::EC2::VPCGatewayAttachment` `AWS::EC2::RouteTable` `AWS::EC2::Route` `AWS::EC2::SubnetRouteTableAssociation` `AWS::EC2::NatGateway` `AWS::EC2::EIP`	You must have a public internet gateway, with public routes, attached to the VPC. In the provided templates, each public subnet has a NAT gateway with an EIP address. These NAT gateways allow cluster resources, like private subnet instances, to reach the internet and are not required for some restricted network or proxy scenarios.
Network access control	`AWS::EC2::NetworkAcl` `AWS::EC2::NetworkAclEntry`	You must allow the VPC to access the following ports:
		Port	Reason
		`80`	Inbound HTTP traffic
		`443`	Inbound HTTPS traffic
		`22`	Inbound SSH traffic
		`1024` - `65535`	Inbound ephemeral traffic
		`0` - `65535`	Outbound ephemeral traffic
Private subnets	`AWS::EC2::Subnet` `AWS::EC2::RouteTable` `AWS::EC2::SubnetRouteTableAssociation`	Your VPC can have private subnets. The provided CloudFormation templates can create private subnets for between 1 and 3 availability zones. If you use private subnets, you must provide appropriate routes and tables for them.

3.6.2.2. VPC validation

To ensure that the subnets that you provide are suitable, the installation program confirms the following data:

All the subnets that you specify exist.
You provide private subnets.
The subnet CIDRs belong to the machine CIDR that you specified.
You provide subnets for each availability zone. Each availability zone contains no more than one public and one private subnet. If you use a private cluster, provide only a private subnet for each availability zone. Otherwise, provide exactly one public and private subnet for each availability zone.
You provide a public subnet for each private subnet availability zone. Machines are not provisioned in availability zones that you do not provide private subnets for.

If you destroy a cluster that uses an existing VPC, the VPC is not deleted. When you remove the OpenShift Container Platform cluster from a VPC, the kubernetes.io/cluster/.*: shared tag is removed from the subnets that it used.

3.6.2.3. Division of permissions

Starting with OpenShift Container Platform 4.3, you do not need all of the permissions that are required for an installation program-provisioned infrastructure cluster to deploy a cluster. This change mimics the division of permissions that you might have at your company: some individuals can create different resource in your clouds than others. For example, you might be able to create application-specific items, like instances, buckets, and load balancers, but not networking-related components such as VPCs, subnets, or ingress rules.

The AWS credentials that you use when you create your cluster do not need the networking permissions that are required to make VPCs and core networking components within the VPC, such as subnets, routing tables, internet gateways, NAT, and VPN. You still need permission to make the application resources that the machines within the cluster require, such as ELBs, security groups, S3 buckets, and nodes.

3.6.2.4. Isolation between clusters

If you deploy OpenShift Container Platform to an existing network, the isolation of cluster services is reduced in the following ways:

You can install multiple OpenShift Container Platform clusters in the same VPC.
ICMP ingress is allowed from the entire network.
TCP 22 ingress (SSH) is allowed to the entire network.
Control plane TCP 6443 ingress (Kubernetes API) is allowed to the entire network.
Control plane TCP 22623 ingress (MCS) is allowed to the entire network.

3.6.2.5. Optional: AWS security groups

By default, the installation program creates and attaches security groups to control plane and compute machines. The rules associated with the default security groups cannot be modified.

However, you can apply additional existing AWS security groups, which are associated with your existing VPC, to control plane and compute machines. Applying custom security groups can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

As part of the installation process, you apply custom security groups by modifying the install-config.yaml file before deploying the cluster.

For more information, see "Applying existing AWS security groups to the cluster".

3.6.2.6. Modifying trust policy when installing into a shared VPC

If you install your cluster using a shared VPC, you can use the Passthrough or Manual credentials mode. You must add the IAM role used to install the cluster as a principal in the trust policy of the account that owns the VPC.

If you use Passthrough mode, add the Amazon Resource Name (ARN) of the account that creates the cluster, such as arn:aws:iam::123456789012:user/clustercreator, to the trust policy as a principal.

If you use Manual mode, add the ARN of the account that creates the cluster as well as the ARN of the ingress operator role in the cluster owner account, such as arn:aws:iam::123456789012:role/<cluster-name>-openshift-ingress-operator-cloud-credentials, to the trust policy as principals.

You must add the following actions to the policy:

Example 3.11. Required actions for shared VPC installation

route53:ChangeResourceRecordSets
route53:ListHostedZones
route53:ListHostedZonesByName
route53:ListResourceRecordSets
route53:ChangeTagsForResource
route53:GetAccountLimit
route53:GetChange
route53:GetHostedZone
route53:ListTagsForResource
route53:UpdateHostedZoneComment
tag:GetResources
tag:UntagResources

3.6.3. Creating the installation configuration file

You can customize the OpenShift Container Platform cluster you install on Amazon Web Services (AWS).

Prerequisites

You have the OpenShift Container Platform installation program and the pull secret for your cluster.

Procedure

Create the install-config.yaml file.
1. Change to the directory that contains the installation program and run the following command:
```
$ ./openshift-install create install-config --dir <installation_directory> 1
```
  1
  For <installation_directory>, specify the directory name to store the files that the installation program creates.
  When specifying the directory:
  - Verify that the directory has the execute permission. This permission is required to run Terraform binaries under the installation directory.
  - Use an empty directory. Some installation assets, such as bootstrap X.509 certificates, have short expiration intervals, therefore you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
2. At the prompts, provide the configuration details for your cloud:
  1. Optional: Select an SSH key to use to access your cluster machines.
    Note
    For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
  2. Select AWS as the platform to target.
  3. If you do not have an Amazon Web Services (AWS) profile stored on your computer, enter the AWS access key ID and secret access key for the user that you configured to run the installation program.
  4. Select the AWS region to deploy the cluster to.
  5. Select the base domain for the Route 53 service that you configured for your cluster.
  6. Enter a descriptive name for your cluster.
Modify the install-config.yaml file. You can find more information about the available parameters in the "Installation configuration parameters" section.
Back up the install-config.yaml file so that you can use it to install multiple clusters.
Important
The install-config.yaml file is consumed during the installation process. If you want to reuse the file, you must back it up now.

Additional resources

Installation configuration parameters for AWS

3.6.3.1. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.14. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

Additional resources

Optimizing storage

3.6.3.2. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.12. Machine types based on 64-bit x86 architecture

c4.*
c5.*
c5a.*
i3.*
m4.*
m5.*
m5a.*
m6a.*
m6i.*
r4.*
r5.*
r5a.*
r6i.*
t3.*
t3a.*

3.6.3.3. Tested instance types for AWS on 64-bit ARM infrastructures

The following Amazon Web Services (AWS) 64-bit ARM instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS ARM instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in "Minimum resource requirements for cluster installation".

Example 3.13. Machine types based on 64-bit ARM architecture

c6g.*
c7g.*
m6g.*
m7g.*
r8g.*

3.6.3.4. Sample customized install-config.yaml file for AWS

You can customize the installation configuration file (install-config.yaml) to specify more details about your OpenShift Container Platform cluster’s platform or modify the values of the required parameters.

Important

This sample YAML file is provided for reference only. You must obtain your install-config.yaml file by using the installation program and modify it.

apiVersion: v1
baseDomain: example.com 1
credentialsMode: Mint 2
controlPlane: 3 4
  hyperthreading: Enabled 5
  name: master
  platform:
    aws:
      zones:
      - us-west-2a
      - us-west-2b
      rootVolume:
        iops: 4000
        size: 500
        type: io1 6
      metadataService:
        authentication: Optional 7
      type: m6i.xlarge
  replicas: 3
compute: 8
- hyperthreading: Enabled 9
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1 10
      metadataService:
        authentication: Optional 11
      type: c5.4xlarge
      zones:
      - us-west-2c
  replicas: 3
metadata:
  name: test-cluster 12
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 13
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: us-west-2 14
    propagateUserTags: true 15
    userTags:
      adminContact: jdoe
      costCenter: 7536
    subnets: 16
    - subnet-1
    - subnet-2
    - subnet-3
    amiID: ami-0c5d3e03c0ab9b19a 17
    serviceEndpoints: 18
      - name: ec2
        url: https://vpce-id.ec2.us-west-2.vpce.amazonaws.com
    hostedZone: Z3URY6TWQ91KVV 19
fips: false 20
sshKey: ssh-ed25519 AAAA... 21
pullSecret: '{"auths": ...}' 22

1 12 14 22: Required. The installation program prompts you for this value.
2: Optional: Add this parameter to force the Cloud Credential Operator (CCO) to use the specified mode. By default, the CCO uses the root credentials in the kube-system namespace to dynamically try to determine the capabilities of the credentials. For details about CCO modes, see the "About the Cloud Credential Operator" section in the Authentication and authorization guide.
3 8 15: If you do not provide these parameters and values, the installation program provides the default value.
4: The controlPlane section is a single mapping, but the compute section is a sequence of mappings. To meet the requirements of the different data structures, the first line of the compute section must begin with a hyphen, -, and the first line of the controlPlane section must not. Only one control plane pool is used.
5 9: Whether to enable or disable simultaneous multithreading, or hyperthreading. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to Disabled. If you disable simultaneous multithreading in some cluster machines, you must disable it in all cluster machines.
Important
If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance. Use larger instance types, such as m4.2xlarge or m5.2xlarge, for your machines if you disable simultaneous multithreading.
6 10: To configure faster storage for etcd, especially for larger clusters, set the storage type as io1 and set iops to 2000.
7 11: Whether to require the Amazon EC2 Instance Metadata Service v2 (IMDSv2). To require IMDSv2, set the parameter value to Required. To allow the use of both IMDSv1 and IMDSv2, set the parameter value to Optional. If no value is specified, both IMDSv1 and IMDSv2 are allowed.
Note
The IMDS configuration for control plane machines that is set during cluster installation can only be changed by using the AWS CLI. The IMDS configuration for compute machines can be changed by using compute machine sets.
13: The cluster network plugin to install. The default value OVNKubernetes is the only supported value.
16: If you provide your own VPC, specify subnets for each availability zone that your cluster uses.
17: The ID of the AMI used to boot machines for the cluster. If set, the AMI must belong to the same region as the cluster.
18: The AWS service endpoints. Custom endpoints are required when installing to an unknown AWS region. The endpoint URL must use the https protocol and the host must trust the certificate.
19: The ID of your existing Route 53 private hosted zone. Providing an existing hosted zone requires that you supply your own VPC and the hosted zone is already associated with the VPC prior to installing your cluster. If undefined, the installation program creates a new hosted zone.
20: Whether to enable or disable FIPS mode. By default, FIPS mode is not enabled. If FIPS mode is enabled, the Red Hat Enterprise Linux CoreOS (RHCOS) machines that OpenShift Container Platform runs on bypass the default Kubernetes cryptography suite and use the cryptography modules that are provided with RHCOS instead.
Important
To enable FIPS mode for your cluster, you must run the installation program from a Red Hat Enterprise Linux (RHEL) computer configured to operate in FIPS mode. For more information about configuring FIPS mode on RHEL, see Switching RHEL to FIPS mode.
When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.
21: You can optionally provide the sshKey value that you use to access the machines in your cluster.
Note
For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.

3.6.3.5. Configuring the cluster-wide proxy during installation

Production environments can deny direct access to the internet and instead have an HTTP or HTTPS proxy available. You can configure a new OpenShift Container Platform cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

You have an existing install-config.yaml file.
You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.
Note
The Proxy object status.noProxy field is populated with the values of the networking.machineNetwork[].cidr, networking.clusterNetwork[].cidr, and networking.serviceNetwork[] fields from your installation configuration.
For installations on Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, and Red Hat OpenStack Platform (RHOSP), the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

Edit your install-config.yaml file and add the proxy settings. For example:
```
apiVersion: v1
baseDomain: my.domain.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port> 1
  httpsProxy: https://<username>:<pswd>@<ip>:<port> 2
  noProxy: ec2.<aws_region>.amazonaws.com,elasticloadbalancing.<aws_region>.amazonaws.com,s3.<aws_region>.amazonaws.com 3
additionalTrustBundle: | 4
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> 5
```
1
A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
2
A proxy URL to use for creating HTTPS connections outside the cluster.
3
A comma-separated list of destination domain names, IP addresses, or other network CIDRs to exclude from proxying. Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass the proxy for all destinations. If you have added the Amazon EC2,Elastic Load Balancing, and S3 VPC endpoints to your VPC, you must add these endpoints to the noProxy field.
4
If provided, the installation program generates a config map that is named user-ca-bundle in the openshift-config namespace that contains one or more additional CA certificates that are required for proxying HTTPS connections. The Cluster Network Operator then creates a trusted-ca-bundle config map that merges these contents with the Red Hat Enterprise Linux CoreOS (RHCOS) trust bundle, and this config map is referenced in the trustedCA field of the Proxy object. The additionalTrustBundle field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.
5
Optional: The policy to determine the configuration of the Proxy object to reference the user-ca-bundle config map in the trustedCA field. The allowed values are Proxyonly and Always. Use Proxyonly to reference the user-ca-bundle config map only when http/https proxy is configured. Use Always to always reference the user-ca-bundle config map. The default value is Proxyonly.
Note
The installation program does not support the proxy readinessEndpoints field.
Note
If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:
```
$ ./openshift-install wait-for install-complete --log-level debug
```
Save the file and reference it when installing OpenShift Container Platform.

The installation program creates a cluster-wide proxy that is named cluster that uses the proxy settings in the provided install-config.yaml file. If no proxy settings are provided, a cluster Proxy object is still created, but it will have a nil spec.

Note

Only the Proxy object named cluster is supported, and no additional proxies can be created.

3.6.3.6. Applying existing AWS security groups to the cluster

Applying existing AWS security groups to your control plane and compute machines can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

Prerequisites

You have created the security groups in AWS. For more information, see the AWS documentation about working with security groups.
The security groups must be associated with the existing VPC that you are deploying the cluster to. The security groups cannot be associated with another VPC.
You have an existing install-config.yaml file.

Procedure

In the install-config.yaml file, edit the compute.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your compute machines.
Edit the controlPlane.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your control plane machines.
Save the file and reference it when deploying the cluster.

Sample install-config.yaml file that specifies custom security groups

# ...
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-1 1
        - sg-2
  replicas: 3
controlPlane:
  hyperthreading: Enabled
  name: master
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-3
        - sg-4
  replicas: 3
platform:
  aws:
    region: us-east-1
    subnets: 2
      - subnet-1
      - subnet-2
      - subnet-3

1: Specify the name of the security group as it appears in the Amazon EC2 console, including the sg prefix.
2: Specify subnets for each availability zone that your cluster uses.

3.6.4. Alternatives to storing administrator-level secrets in the kube-system project

By default, administrator secrets are stored in the kube-system project. If you configured the credentialsMode parameter in the install-config.yaml file to Manual, you must use one of the following alternatives:

To manage long-term cloud credentials manually, follow the procedure in Manually creating long-term credentials.
To implement short-term credentials that are managed outside the cluster for individual components, follow the procedures in Configuring an AWS cluster to use short-term credentials.

3.6.4.1. Manually creating long-term credentials

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```

Extract the list of CredentialsRequest custom resources (CRs) from the OpenShift Container Platform release image by running the following command:

$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3

1: The --included parameter includes only the manifests that your specific cluster configuration requires.
2: Specify the location of the install-config.yaml file.
3: Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

This command creates a YAML file for each CredentialsRequest object.

Sample CredentialsRequest object

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - iam:GetUser
      - iam:GetUserPolicy
      - iam:ListAccessKeys
      resource: "*"
  ...

Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object.

Sample CredentialsRequest object with secrets

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - s3:CreateBucket
      - s3:DeleteBucket
      resource: "*"
      ...
  secretRef:
    name: <component_secret>
    namespace: <component_namespace>
  ...

Sample Secret object

apiVersion: v1
kind: Secret
metadata:
  name: <component_secret>
  namespace: <component_namespace>
data:
  aws_access_key_id: <base64_encoded_aws_access_key_id>
  aws_secret_access_key: <base64_encoded_aws_secret_access_key>

Important

Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

3.6.4.2. Configuring an AWS cluster to use short-term credentials

To install a cluster that is configured to use the AWS Security Token Service (STS), you must configure the CCO utility and create the required AWS resources for your cluster.

3.6.4.2.1. Configuring the Cloud Credential Operator utility

To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.

Note

The ccoctl utility is a Linux binary that must run in a Linux environment.

Prerequisites

You have access to an OpenShift Container Platform account with cluster administrator access.
You have installed the OpenShift CLI (oc).

You have created an AWS account for the ccoctl utility to use with the following permissions:
Example 3.14. Required AWS permissions
Required iam permissions
- iam:CreateOpenIDConnectProvider
- iam:CreateRole
- iam:DeleteOpenIDConnectProvider
- iam:DeleteRole
- iam:DeleteRolePolicy
- iam:GetOpenIDConnectProvider
- iam:GetRole
- iam:GetUser
- iam:ListOpenIDConnectProviders
- iam:ListRolePolicies
- iam:ListRoles
- iam:PutRolePolicy
- iam:TagOpenIDConnectProvider
- iam:TagRole
Required s3 permissions
- s3:CreateBucket
- s3:DeleteBucket
- s3:DeleteObject
- s3:GetBucketAcl
- s3:GetBucketTagging
- s3:GetObject
- s3:GetObjectAcl
- s3:GetObjectTagging
- s3:ListBucket
- s3:PutBucketAcl
- s3:PutBucketPolicy
- s3:PutBucketPublicAccessBlock
- s3:PutBucketTagging
- s3:PutObject
- s3:PutObjectAcl
- s3:PutObjectTagging
Required cloudfront permissions
- cloudfront:ListCloudFrontOriginAccessIdentities
- cloudfront:ListDistributions
- cloudfront:ListTagsForResource
If you plan to store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL, the AWS account that runs the ccoctl utility requires the following additional permissions:
Example 3.15. Additional permissions for a private S3 bucket with CloudFront
- cloudfront:CreateCloudFrontOriginAccessIdentity
- cloudfront:CreateDistribution
- cloudfront:DeleteCloudFrontOriginAccessIdentity
- cloudfront:DeleteDistribution
- cloudfront:GetCloudFrontOriginAccessIdentity
- cloudfront:GetCloudFrontOriginAccessIdentityConfig
- cloudfront:GetDistribution
- cloudfront:TagResource
- cloudfront:UpdateDistribution
Note
These additional permissions support the use of the --create-private-s3-bucket option when processing credentials requests with the ccoctl aws create-all command.

Procedure

Set a variable for the OpenShift Container Platform release image by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
```
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
```
Note
Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.
Extract the ccoctl binary from the CCO container image within the OpenShift Container Platform release image by running the following command:
```
$ oc image extract $CCO_IMAGE \
  --file="/usr/bin/ccoctl.<rhel_version>" \1
  -a ~/.pull-secret
```
1
For <rhel_version>, specify the value that corresponds to the version of Red Hat Enterprise Linux (RHEL) that the host uses. If no value is specified, ccoctl.rhel8 is used by default. The following values are valid:
rhel8: Specify this value for hosts that use RHEL 8.
rhel9: Specify this value for hosts that use RHEL 9.
Change the permissions to make ccoctl executable by running the following command:
```
$ chmod 775 ccoctl.<rhel_version>
```

Verification

To verify that ccoctl is ready to use, display the help file. Use a relative file name when you run the command, for example:

$ ./ccoctl.rhel9

Example output

OpenShift credentials provisioning tool

Usage:
  ccoctl [command]

Available Commands:
  aws          Manage credentials objects for AWS cloud
  azure        Manage credentials objects for Azure
  gcp          Manage credentials objects for Google cloud
  help         Help about any command
  ibmcloud     Manage credentials objects for {ibm-cloud-title}
  nutanix      Manage credentials objects for Nutanix

Flags:
  -h, --help   help for ccoctl

Use "ccoctl [command] --help" for more information about a command.

3.6.4.2.2. Creating AWS resources with the Cloud Credential Operator utility

You have the following options when creating AWS resources:

You can use the ccoctl aws create-all command to create the AWS resources automatically. This is the quickest way to create the resources. See Creating AWS resources with a single command.
If you need to review the JSON files that the ccoctl tool creates before modifying AWS resources, or if the process the ccoctl tool uses to create AWS resources automatically does not meet the requirements of your organization, you can create the AWS resources individually. See Creating AWS resources individually.

3.6.4.2.2.1. Creating AWS resources with a single command

If the process the ccoctl tool uses to create AWS resources automatically meets the requirements of your organization, you can use the ccoctl aws create-all command to automate the creation of AWS resources.

Otherwise, you can create the AWS resources individually. For more information, see "Creating AWS resources individually".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Prerequisites

You must have:

Extracted and prepared the ccoctl binary.

Procedure

Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image by running the following command:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
1
The --included parameter includes only the manifests that your specific cluster configuration requires.
2
Specify the location of the install-config.yaml file.
3
Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
Note
This command might take a few moments to run.
Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-all \
  --name=<name> \1
  --region=<aws_region> \2
  --credentials-requests-dir=<path_to_credentials_requests_directory> \3
  --output-dir=<path_to_ccoctl_output_dir> \4
  --create-private-s3-bucket 5
```
1
Specify the name used to tag any cloud resources that are created for tracking.
2
Specify the AWS region in which cloud resources will be created.
3
Specify the directory containing the files for the component CredentialsRequest objects.
4
Optional: Specify the directory in which you want the ccoctl utility to create objects. By default, the utility creates objects in the directory in which the commands are run.
5
Optional: By default, the ccoctl utility stores the OpenID Connect (OIDC) configuration files in a public S3 bucket and uses the S3 URL as the public OIDC endpoint. To store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL instead, use the --create-private-s3-bucket parameter.
Note
If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.6.4.2.2.2. Creating AWS resources individually

You can use the ccoctl tool to create AWS resources individually. This option might be useful for an organization that shares the responsibility for creating these resources among different users or departments.

Otherwise, you can use the ccoctl aws create-all command to create the AWS resources automatically. For more information, see "Creating AWS resources with a single command".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Some ccoctl commands make AWS API calls to create or modify AWS resources. You can use the --dry-run flag to avoid making API calls. Using this flag creates JSON files on the local file system instead. You can review and modify the JSON files and then apply them with the AWS CLI tool using the --cli-input-json parameters.

Prerequisites

Extract and prepare the ccoctl binary.

Procedure

Generate the public and private RSA key files that are used to set up the OpenID Connect provider for the cluster by running the following command:
```
$ ccoctl aws create-key-pair
```
Example output
```
2021/04/13 11:01:02 Generating RSA keypair
2021/04/13 11:01:03 Writing private key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.private
2021/04/13 11:01:03 Writing public key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.public
2021/04/13 11:01:03 Copying signing key for use by installer
```
where serviceaccount-signer.private and serviceaccount-signer.public are the generated key files.
This command also creates a private key that the cluster requires during installation in /<path_to_ccoctl_output_dir>/tls/bound-service-account-signing-key.key.
Create an OpenID Connect identity provider and S3 bucket on AWS by running the following command:
```
$ ccoctl aws create-identity-provider \
  --name=<name> \1
  --region=<aws_region> \2
  --public-key-file=<path_to_ccoctl_output_dir>/serviceaccount-signer.public 3
```
1
<name> is the name used to tag any cloud resources that are created for tracking.
2
<aws-region> is the AWS region in which cloud resources will be created.
3
<path_to_ccoctl_output_dir> is the path to the public key file that the ccoctl aws create-key-pair command generated.
Example output
```
2021/04/13 11:16:09 Bucket <name>-oidc created
2021/04/13 11:16:10 OpenID Connect discovery document in the S3 bucket <name>-oidc at .well-known/openid-configuration updated
2021/04/13 11:16:10 Reading public key
2021/04/13 11:16:10 JSON web key set (JWKS) in the S3 bucket <name>-oidc at keys.json updated
2021/04/13 11:16:18 Identity Provider created with ARN: arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
where openid-configuration is a discovery document and keys.json is a JSON web key set file.
This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/cluster-authentication-02-config.yaml. This file sets the issuer URL field for the service account tokens that the cluster generates, so that the AWS IAM identity provider trusts the tokens.
Create IAM roles for each component in the cluster:
1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
2. Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
  1
  The --included parameter includes only the manifests that your specific cluster configuration requires.
  2
  Specify the location of the install-config.yaml file.
  3
  Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-iam-roles \
  --name=<name> \
  --region=<aws_region> \
  --credentials-requests-dir=<path_to_credentials_requests_directory> \
  --identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
  Note
  For AWS environments that use alternative IAM API endpoints, such as GovCloud, you must also specify your region with the --region parameter.
  If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.
  For each CredentialsRequest object, ccoctl creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy as defined in each CredentialsRequest object from the OpenShift Container Platform release image.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.6.4.2.3. Incorporating the Cloud Credential Operator utility manifests

To implement short-term security credentials managed outside the cluster for individual components, you must move the manifest files that the Cloud Credential Operator utility (ccoctl) created to the correct directories for the installation program.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have configured the Cloud Credential Operator utility (ccoctl).
You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:
```
$ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/
```
Copy the tls directory that contains the private key to the installation directory:
```
$ cp -a /<path_to_ccoctl_output_dir>/tls .
```

3.6.5. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.6.6. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.6.7. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

See Accessing the web console for more details about accessing and understanding the OpenShift Container Platform web console.

3.6.8. Next steps

Validating an installation.
Customize your cluster.
If necessary, you can opt out of remote health reporting.
If necessary, you can remove cloud provider credentials.
After installing a cluster on AWS into an existing VPC, you can extend the AWS VPC cluster into an AWS Outpost.

3.7. Installing a private cluster on AWS

In OpenShift Container Platform version 4.17, you can install a private cluster into an existing VPC on Amazon Web Services (AWS). The installation program provisions the rest of the required infrastructure, which you can further customize. To customize the installation, you modify parameters in the install-config.yaml file before you install the cluster.

3.7.1. Prerequisites

You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
Important
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.

3.7.2. Private clusters

You can deploy a private OpenShift Container Platform cluster that does not expose external endpoints. Private clusters are accessible from only an internal network and are not visible to the internet.

By default, OpenShift Container Platform is provisioned to use publicly-accessible DNS and endpoints. A private cluster sets the DNS, Ingress Controller, and API server to private when you deploy your cluster. This means that the cluster resources are only accessible from your internal network and are not visible to the internet.

Important

If the cluster has any public subnets, load balancer services created by administrators might be publicly accessible. To ensure cluster security, verify that these services are explicitly annotated as private.

To deploy a private cluster, you must:

Use existing networking that meets your requirements. Your cluster resources might be shared between other clusters on the network.
Deploy from a machine that has access to:
- The API services for the cloud to which you provision.
- The hosts on the network that you provision.
- The internet to obtain installation media.

You can use any machine that meets these access requirements and follows your company’s guidelines. For example, this machine can be a bastion host on your cloud network or a machine that has access to the network through a VPN.

3.7.2.1. Private clusters in AWS

To create a private cluster on Amazon Web Services (AWS), you must provide an existing private VPC and subnets to host the cluster. The installation program must also be able to resolve the DNS records that the cluster requires. The installation program configures the Ingress Operator and API server for access from only the private network.

The cluster still requires access to internet to access the AWS APIs.

The following items are not required or created when you install a private cluster:

Public subnets
Public load balancers, which support public ingress
A public Route 53 zone that matches the baseDomain for the cluster

The installation program does use the baseDomain that you specify to create a private Route 53 zone and the required records for the cluster. The cluster is configured so that the Operators do not create public records for the cluster and all cluster machines are placed in the private subnets that you specify.

3.7.2.1.1. Limitations

The ability to add public functionality to a private cluster is limited.

You cannot make the Kubernetes API endpoints public after installation without taking additional actions, including creating public subnets in the VPC for each availability zone in use, creating a public load balancer, and configuring the control plane security groups to allow traffic from the internet on 6443 (Kubernetes API port).
If you use a public Service type load balancer, you must tag a public subnet in each availability zone with kubernetes.io/cluster/<cluster-infra-id>: shared so that AWS can use them to create public load balancers.

3.7.3. About using a custom VPC

In OpenShift Container Platform 4.17, you can deploy a cluster into existing subnets in an existing Amazon Virtual Private Cloud (VPC) in Amazon Web Services (AWS). By deploying OpenShift Container Platform into an existing AWS VPC, you might be able to avoid limit constraints in new accounts or more easily abide by the operational constraints that your company’s guidelines set. If you cannot obtain the infrastructure creation permissions that are required to create the VPC yourself, use this installation option.

Because the installation program cannot know what other components are also in your existing subnets, it cannot choose subnet CIDRs and so forth on your behalf. You must configure networking for the subnets that you install your cluster to yourself.

3.7.3.1. Requirements for using your VPC

The installation program no longer creates the following components:

Internet gateways
NAT gateways
Subnets
Route tables
VPCs
VPC DHCP options
VPC endpoints

Note

The installation program requires that you use the cloud-provided DNS server. Using a custom DNS server is not supported and causes the installation to fail.

If you use a custom VPC, you must correctly configure it and its subnets for the installation program and the cluster to use. See Create a VPC in the Amazon Web Services documentation for more information about AWS VPC console wizard configurations and creating and managing an AWS VPC.

The installation program cannot:

Subdivide network ranges for the cluster to use.
Set route tables for the subnets.
Set VPC options like DHCP.

You must complete these tasks before you install the cluster. See VPC networking components and Route tables for your VPC for more information on configuring networking in an AWS VPC.

Your VPC must meet the following characteristics:

The VPC must not use the kubernetes.io/cluster/.*: owned, Name, and openshift.io/cluster tags.
The installation program modifies your subnets to add the kubernetes.io/cluster/.*: shared tag, so your subnets must have at least one free tag slot available for it. See Tag Restrictions in the AWS documentation to confirm that the installation program can add a tag to each subnet that you specify. You cannot use a Name tag, because it overlaps with the EC2 Name field and the installation fails.
If you want to extend your OpenShift Container Platform cluster into an AWS Outpost and have an existing Outpost subnet, the existing subnet must use the kubernetes.io/cluster/unmanaged: true tag. If you do not apply this tag, the installation might fail due to the Cloud Controller Manager creating a service load balancer in the Outpost subnet, which is an unsupported configuration.
You must enable the enableDnsSupport and enableDnsHostnames attributes in your VPC, so that the cluster can use the Route 53 zones that are attached to the VPC to resolve cluster’s internal DNS records. See DNS Support in Your VPC in the AWS documentation.
If you prefer to use your own Route 53 hosted private zone, you must associate the existing hosted zone with your VPC prior to installing a cluster. You can define your hosted zone using the platform.aws.hostedZone and platform.aws.hostedZoneRole fields in the install-config.yaml file. You can use a private hosted zone from another account by sharing it with the account where you install the cluster. If you use a private hosted zone from another account, you must use the Passthrough or Manual credentials mode.

If you are working in a disconnected environment, you are unable to reach the public IP addresses for EC2, ELB, and S3 endpoints. Depending on the level to which you want to restrict internet traffic during the installation, the following configuration options are available:

Option 1: Create VPC endpoints

Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

With this option, network traffic remains private between your VPC and the required AWS services.

Option 2: Create a proxy without VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy. With this option, internet traffic goes through the proxy to reach the required AWS services.

Option 3: Create a proxy with VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy with VPC endpoints. Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

When configuring the proxy in the install-config.yaml file, add these endpoints to the noProxy field. With this option, the proxy prevents the cluster from accessing the internet directly. However, network traffic remains private between your VPC and the required AWS services.

Required VPC components

You must provide a suitable VPC and subnets that allow communication to your machines.

Component	AWS type	Description
VPC	`AWS::EC2::VPC` `AWS::EC2::VPCEndpoint`	You must provide a public VPC for the cluster to use. The VPC uses an endpoint that references the route tables for each subnet to improve communication with the registry that is hosted in S3.
Public subnets	`AWS::EC2::Subnet` `AWS::EC2::SubnetNetworkAclAssociation`	Your VPC must have public subnets for between 1 and 3 availability zones and associate them with appropriate Ingress rules.
Internet gateway	`AWS::EC2::InternetGateway` `AWS::EC2::VPCGatewayAttachment` `AWS::EC2::RouteTable` `AWS::EC2::Route` `AWS::EC2::SubnetRouteTableAssociation` `AWS::EC2::NatGateway` `AWS::EC2::EIP`	You must have a public internet gateway, with public routes, attached to the VPC. In the provided templates, each public subnet has a NAT gateway with an EIP address. These NAT gateways allow cluster resources, like private subnet instances, to reach the internet and are not required for some restricted network or proxy scenarios.
Network access control	`AWS::EC2::NetworkAcl` `AWS::EC2::NetworkAclEntry`	You must allow the VPC to access the following ports:
		Port	Reason
		`80`	Inbound HTTP traffic
		`443`	Inbound HTTPS traffic
		`22`	Inbound SSH traffic
		`1024` - `65535`	Inbound ephemeral traffic
		`0` - `65535`	Outbound ephemeral traffic
Private subnets	`AWS::EC2::Subnet` `AWS::EC2::RouteTable` `AWS::EC2::SubnetRouteTableAssociation`	Your VPC can have private subnets. The provided CloudFormation templates can create private subnets for between 1 and 3 availability zones. If you use private subnets, you must provide appropriate routes and tables for them.

3.7.3.2. VPC validation

To ensure that the subnets that you provide are suitable, the installation program confirms the following data:

All the subnets that you specify exist.
You provide private subnets.
The subnet CIDRs belong to the machine CIDR that you specified.
You provide subnets for each availability zone. Each availability zone contains no more than one public and one private subnet. If you use a private cluster, provide only a private subnet for each availability zone. Otherwise, provide exactly one public and private subnet for each availability zone.
You provide a public subnet for each private subnet availability zone. Machines are not provisioned in availability zones that you do not provide private subnets for.

If you destroy a cluster that uses an existing VPC, the VPC is not deleted. When you remove the OpenShift Container Platform cluster from a VPC, the kubernetes.io/cluster/.*: shared tag is removed from the subnets that it used.

3.7.3.3. Division of permissions

Starting with OpenShift Container Platform 4.3, you do not need all of the permissions that are required for an installation program-provisioned infrastructure cluster to deploy a cluster. This change mimics the division of permissions that you might have at your company: some individuals can create different resource in your clouds than others. For example, you might be able to create application-specific items, like instances, buckets, and load balancers, but not networking-related components such as VPCs, subnets, or ingress rules.

The AWS credentials that you use when you create your cluster do not need the networking permissions that are required to make VPCs and core networking components within the VPC, such as subnets, routing tables, internet gateways, NAT, and VPN. You still need permission to make the application resources that the machines within the cluster require, such as ELBs, security groups, S3 buckets, and nodes.

3.7.3.4. Isolation between clusters

If you deploy OpenShift Container Platform to an existing network, the isolation of cluster services is reduced in the following ways:

You can install multiple OpenShift Container Platform clusters in the same VPC.
ICMP ingress is allowed from the entire network.
TCP 22 ingress (SSH) is allowed to the entire network.
Control plane TCP 6443 ingress (Kubernetes API) is allowed to the entire network.
Control plane TCP 22623 ingress (MCS) is allowed to the entire network.

3.7.3.5. Optional: AWS security groups

By default, the installation program creates and attaches security groups to control plane and compute machines. The rules associated with the default security groups cannot be modified.

However, you can apply additional existing AWS security groups, which are associated with your existing VPC, to control plane and compute machines. Applying custom security groups can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

As part of the installation process, you apply custom security groups by modifying the install-config.yaml file before deploying the cluster.

For more information, see "Applying existing AWS security groups to the cluster".

3.7.4. Manually creating the installation configuration file

Installing the cluster requires that you manually create the installation configuration file.

Prerequisites

You have an SSH public key on your local machine to provide to the installation program. The key will be used for SSH authentication onto your cluster nodes for debugging and disaster recovery.
You have obtained the OpenShift Container Platform installation program and the pull secret for your cluster.

Procedure

Create an installation directory to store your required installation assets in:
```
$ mkdir <installation_directory>
```
Important
You must create a directory. Some installation assets, like bootstrap X.509 certificates have short expiration intervals, so you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
Customize the sample install-config.yaml file template that is provided and save it in the <installation_directory>.
Note
You must name this configuration file install-config.yaml.
Back up the install-config.yaml file so that you can use it to install multiple clusters.
Important
The install-config.yaml file is consumed during the next step of the installation process. You must back it up now.

Additional resources

Installation configuration parameters for AWS

3.7.4.1. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.15. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

Additional resources

Optimizing storage

3.7.4.2. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.16. Machine types based on 64-bit x86 architecture

c4.*
c5.*
c5a.*
i3.*
m4.*
m5.*
m5a.*
m6a.*
m6i.*
r4.*
r5.*
r5a.*
r6i.*
t3.*
t3a.*

3.7.4.3. Tested instance types for AWS on 64-bit ARM infrastructures

The following Amazon Web Services (AWS) 64-bit ARM instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS ARM instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in "Minimum resource requirements for cluster installation".

Example 3.17. Machine types based on 64-bit ARM architecture

c6g.*
c7g.*
m6g.*
m7g.*
r8g.*

3.7.4.4. Sample customized install-config.yaml file for AWS

You can customize the installation configuration file (install-config.yaml) to specify more details about your OpenShift Container Platform cluster’s platform or modify the values of the required parameters.

Important

This sample YAML file is provided for reference only. You must obtain your install-config.yaml file by using the installation program and modify it.

apiVersion: v1
baseDomain: example.com 1
credentialsMode: Mint 2
controlPlane: 3 4
  hyperthreading: Enabled 5
  name: master
  platform:
    aws:
      zones:
      - us-west-2a
      - us-west-2b
      rootVolume:
        iops: 4000
        size: 500
        type: io1 6
      metadataService:
        authentication: Optional 7
      type: m6i.xlarge
  replicas: 3
compute: 8
- hyperthreading: Enabled 9
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1 10
      metadataService:
        authentication: Optional 11
      type: c5.4xlarge
      zones:
      - us-west-2c
  replicas: 3
metadata:
  name: test-cluster 12
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 13
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: us-west-2 14
    propagateUserTags: true 15
    userTags:
      adminContact: jdoe
      costCenter: 7536
    subnets: 16
    - subnet-1
    - subnet-2
    - subnet-3
    amiID: ami-0c5d3e03c0ab9b19a 17
    serviceEndpoints: 18
      - name: ec2
        url: https://vpce-id.ec2.us-west-2.vpce.amazonaws.com
    hostedZone: Z3URY6TWQ91KVV 19
fips: false 20
sshKey: ssh-ed25519 AAAA... 21
publish: Internal 22
pullSecret: '{"auths": ...}' 23

1 12 14 23: Required. The installation program prompts you for this value.
2: Optional: Add this parameter to force the Cloud Credential Operator (CCO) to use the specified mode. By default, the CCO uses the root credentials in the kube-system namespace to dynamically try to determine the capabilities of the credentials. For details about CCO modes, see the "About the Cloud Credential Operator" section in the Authentication and authorization guide.
3 8 15: If you do not provide these parameters and values, the installation program provides the default value.
4: The controlPlane section is a single mapping, but the compute section is a sequence of mappings. To meet the requirements of the different data structures, the first line of the compute section must begin with a hyphen, -, and the first line of the controlPlane section must not. Only one control plane pool is used.
5 9: Whether to enable or disable simultaneous multithreading, or hyperthreading. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to Disabled. If you disable simultaneous multithreading in some cluster machines, you must disable it in all cluster machines.
Important
If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance. Use larger instance types, such as m4.2xlarge or m5.2xlarge, for your machines if you disable simultaneous multithreading.
6 10: To configure faster storage for etcd, especially for larger clusters, set the storage type as io1 and set iops to 2000.
7 11: Whether to require the Amazon EC2 Instance Metadata Service v2 (IMDSv2). To require IMDSv2, set the parameter value to Required. To allow the use of both IMDSv1 and IMDSv2, set the parameter value to Optional. If no value is specified, both IMDSv1 and IMDSv2 are allowed.
Note
The IMDS configuration for control plane machines that is set during cluster installation can only be changed by using the AWS CLI. The IMDS configuration for compute machines can be changed by using compute machine sets.
13: The cluster network plugin to install. The default value OVNKubernetes is the only supported value.
16: If you provide your own VPC, specify subnets for each availability zone that your cluster uses.
17: The ID of the AMI used to boot machines for the cluster. If set, the AMI must belong to the same region as the cluster.
18: The AWS service endpoints. Custom endpoints are required when installing to an unknown AWS region. The endpoint URL must use the https protocol and the host must trust the certificate.
19: The ID of your existing Route 53 private hosted zone. Providing an existing hosted zone requires that you supply your own VPC and the hosted zone is already associated with the VPC prior to installing your cluster. If undefined, the installation program creates a new hosted zone.
20: Whether to enable or disable FIPS mode. By default, FIPS mode is not enabled. If FIPS mode is enabled, the Red Hat Enterprise Linux CoreOS (RHCOS) machines that OpenShift Container Platform runs on bypass the default Kubernetes cryptography suite and use the cryptography modules that are provided with RHCOS instead.
Important
To enable FIPS mode for your cluster, you must run the installation program from a Red Hat Enterprise Linux (RHEL) computer configured to operate in FIPS mode. For more information about configuring FIPS mode on RHEL, see Switching RHEL to FIPS mode.
When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.
21: You can optionally provide the sshKey value that you use to access the machines in your cluster.
Note
For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
22: How to publish the user-facing endpoints of your cluster. Set publish to Internal to deploy a private cluster, which cannot be accessed from the internet. The default value is External.

3.7.4.5. Configuring the cluster-wide proxy during installation

Production environments can deny direct access to the internet and instead have an HTTP or HTTPS proxy available. You can configure a new OpenShift Container Platform cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

You have an existing install-config.yaml file.
You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.
Note
The Proxy object status.noProxy field is populated with the values of the networking.machineNetwork[].cidr, networking.clusterNetwork[].cidr, and networking.serviceNetwork[] fields from your installation configuration.
For installations on Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, and Red Hat OpenStack Platform (RHOSP), the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

Edit your install-config.yaml file and add the proxy settings. For example:
```
apiVersion: v1
baseDomain: my.domain.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port> 1
  httpsProxy: https://<username>:<pswd>@<ip>:<port> 2
  noProxy: ec2.<aws_region>.amazonaws.com,elasticloadbalancing.<aws_region>.amazonaws.com,s3.<aws_region>.amazonaws.com 3
additionalTrustBundle: | 4
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> 5
```
1
A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
2
A proxy URL to use for creating HTTPS connections outside the cluster.
3
A comma-separated list of destination domain names, IP addresses, or other network CIDRs to exclude from proxying. Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass the proxy for all destinations. If you have added the Amazon EC2,Elastic Load Balancing, and S3 VPC endpoints to your VPC, you must add these endpoints to the noProxy field.
4
If provided, the installation program generates a config map that is named user-ca-bundle in the openshift-config namespace that contains one or more additional CA certificates that are required for proxying HTTPS connections. The Cluster Network Operator then creates a trusted-ca-bundle config map that merges these contents with the Red Hat Enterprise Linux CoreOS (RHCOS) trust bundle, and this config map is referenced in the trustedCA field of the Proxy object. The additionalTrustBundle field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.
5
Optional: The policy to determine the configuration of the Proxy object to reference the user-ca-bundle config map in the trustedCA field. The allowed values are Proxyonly and Always. Use Proxyonly to reference the user-ca-bundle config map only when http/https proxy is configured. Use Always to always reference the user-ca-bundle config map. The default value is Proxyonly.
Note
The installation program does not support the proxy readinessEndpoints field.
Note
If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:
```
$ ./openshift-install wait-for install-complete --log-level debug
```
Save the file and reference it when installing OpenShift Container Platform.

The installation program creates a cluster-wide proxy that is named cluster that uses the proxy settings in the provided install-config.yaml file. If no proxy settings are provided, a cluster Proxy object is still created, but it will have a nil spec.

Note

Only the Proxy object named cluster is supported, and no additional proxies can be created.

3.7.4.6. Applying existing AWS security groups to the cluster

Applying existing AWS security groups to your control plane and compute machines can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

Prerequisites

You have created the security groups in AWS. For more information, see the AWS documentation about working with security groups.
The security groups must be associated with the existing VPC that you are deploying the cluster to. The security groups cannot be associated with another VPC.
You have an existing install-config.yaml file.

Procedure

In the install-config.yaml file, edit the compute.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your compute machines.
Edit the controlPlane.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your control plane machines.
Save the file and reference it when deploying the cluster.

Sample install-config.yaml file that specifies custom security groups

# ...
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-1 1
        - sg-2
  replicas: 3
controlPlane:
  hyperthreading: Enabled
  name: master
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-3
        - sg-4
  replicas: 3
platform:
  aws:
    region: us-east-1
    subnets: 2
      - subnet-1
      - subnet-2
      - subnet-3

1: Specify the name of the security group as it appears in the Amazon EC2 console, including the sg prefix.
2: Specify subnets for each availability zone that your cluster uses.

3.7.5. Alternatives to storing administrator-level secrets in the kube-system project

By default, administrator secrets are stored in the kube-system project. If you configured the credentialsMode parameter in the install-config.yaml file to Manual, you must use one of the following alternatives:

To manage long-term cloud credentials manually, follow the procedure in Manually creating long-term credentials.
To implement short-term credentials that are managed outside the cluster for individual components, follow the procedures in Configuring an AWS cluster to use short-term credentials.

3.7.5.1. Manually creating long-term credentials

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```

Extract the list of CredentialsRequest custom resources (CRs) from the OpenShift Container Platform release image by running the following command:

$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3

1: The --included parameter includes only the manifests that your specific cluster configuration requires.
2: Specify the location of the install-config.yaml file.
3: Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

This command creates a YAML file for each CredentialsRequest object.

Sample CredentialsRequest object

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - iam:GetUser
      - iam:GetUserPolicy
      - iam:ListAccessKeys
      resource: "*"
  ...

Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object.

Sample CredentialsRequest object with secrets

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - s3:CreateBucket
      - s3:DeleteBucket
      resource: "*"
      ...
  secretRef:
    name: <component_secret>
    namespace: <component_namespace>
  ...

Sample Secret object

apiVersion: v1
kind: Secret
metadata:
  name: <component_secret>
  namespace: <component_namespace>
data:
  aws_access_key_id: <base64_encoded_aws_access_key_id>
  aws_secret_access_key: <base64_encoded_aws_secret_access_key>

Important

Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

3.7.5.2. Configuring an AWS cluster to use short-term credentials

To install a cluster that is configured to use the AWS Security Token Service (STS), you must configure the CCO utility and create the required AWS resources for your cluster.

3.7.5.2.1. Configuring the Cloud Credential Operator utility

To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.

Note

The ccoctl utility is a Linux binary that must run in a Linux environment.

Prerequisites

You have access to an OpenShift Container Platform account with cluster administrator access.
You have installed the OpenShift CLI (oc).

You have created an AWS account for the ccoctl utility to use with the following permissions:
Example 3.18. Required AWS permissions
Required iam permissions
- iam:CreateOpenIDConnectProvider
- iam:CreateRole
- iam:DeleteOpenIDConnectProvider
- iam:DeleteRole
- iam:DeleteRolePolicy
- iam:GetOpenIDConnectProvider
- iam:GetRole
- iam:GetUser
- iam:ListOpenIDConnectProviders
- iam:ListRolePolicies
- iam:ListRoles
- iam:PutRolePolicy
- iam:TagOpenIDConnectProvider
- iam:TagRole
Required s3 permissions
- s3:CreateBucket
- s3:DeleteBucket
- s3:DeleteObject
- s3:GetBucketAcl
- s3:GetBucketTagging
- s3:GetObject
- s3:GetObjectAcl
- s3:GetObjectTagging
- s3:ListBucket
- s3:PutBucketAcl
- s3:PutBucketPolicy
- s3:PutBucketPublicAccessBlock
- s3:PutBucketTagging
- s3:PutObject
- s3:PutObjectAcl
- s3:PutObjectTagging
Required cloudfront permissions
- cloudfront:ListCloudFrontOriginAccessIdentities
- cloudfront:ListDistributions
- cloudfront:ListTagsForResource
If you plan to store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL, the AWS account that runs the ccoctl utility requires the following additional permissions:
Example 3.19. Additional permissions for a private S3 bucket with CloudFront
- cloudfront:CreateCloudFrontOriginAccessIdentity
- cloudfront:CreateDistribution
- cloudfront:DeleteCloudFrontOriginAccessIdentity
- cloudfront:DeleteDistribution
- cloudfront:GetCloudFrontOriginAccessIdentity
- cloudfront:GetCloudFrontOriginAccessIdentityConfig
- cloudfront:GetDistribution
- cloudfront:TagResource
- cloudfront:UpdateDistribution
Note
These additional permissions support the use of the --create-private-s3-bucket option when processing credentials requests with the ccoctl aws create-all command.

Procedure

Set a variable for the OpenShift Container Platform release image by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
```
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
```
Note
Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.
Extract the ccoctl binary from the CCO container image within the OpenShift Container Platform release image by running the following command:
```
$ oc image extract $CCO_IMAGE \
  --file="/usr/bin/ccoctl.<rhel_version>" \1
  -a ~/.pull-secret
```
1
For <rhel_version>, specify the value that corresponds to the version of Red Hat Enterprise Linux (RHEL) that the host uses. If no value is specified, ccoctl.rhel8 is used by default. The following values are valid:
rhel8: Specify this value for hosts that use RHEL 8.
rhel9: Specify this value for hosts that use RHEL 9.
Change the permissions to make ccoctl executable by running the following command:
```
$ chmod 775 ccoctl.<rhel_version>
```

Verification

To verify that ccoctl is ready to use, display the help file. Use a relative file name when you run the command, for example:

$ ./ccoctl.rhel9

Example output

OpenShift credentials provisioning tool

Usage:
  ccoctl [command]

Available Commands:
  aws          Manage credentials objects for AWS cloud
  azure        Manage credentials objects for Azure
  gcp          Manage credentials objects for Google cloud
  help         Help about any command
  ibmcloud     Manage credentials objects for {ibm-cloud-title}
  nutanix      Manage credentials objects for Nutanix

Flags:
  -h, --help   help for ccoctl

Use "ccoctl [command] --help" for more information about a command.

3.7.5.2.2. Creating AWS resources with the Cloud Credential Operator utility

You have the following options when creating AWS resources:

You can use the ccoctl aws create-all command to create the AWS resources automatically. This is the quickest way to create the resources. See Creating AWS resources with a single command.
If you need to review the JSON files that the ccoctl tool creates before modifying AWS resources, or if the process the ccoctl tool uses to create AWS resources automatically does not meet the requirements of your organization, you can create the AWS resources individually. See Creating AWS resources individually.

3.7.5.2.2.1. Creating AWS resources with a single command

If the process the ccoctl tool uses to create AWS resources automatically meets the requirements of your organization, you can use the ccoctl aws create-all command to automate the creation of AWS resources.

Otherwise, you can create the AWS resources individually. For more information, see "Creating AWS resources individually".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Prerequisites

You must have:

Extracted and prepared the ccoctl binary.

Procedure

Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image by running the following command:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
1
The --included parameter includes only the manifests that your specific cluster configuration requires.
2
Specify the location of the install-config.yaml file.
3
Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
Note
This command might take a few moments to run.
Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-all \
  --name=<name> \1
  --region=<aws_region> \2
  --credentials-requests-dir=<path_to_credentials_requests_directory> \3
  --output-dir=<path_to_ccoctl_output_dir> \4
  --create-private-s3-bucket 5
```
1
Specify the name used to tag any cloud resources that are created for tracking.
2
Specify the AWS region in which cloud resources will be created.
3
Specify the directory containing the files for the component CredentialsRequest objects.
4
Optional: Specify the directory in which you want the ccoctl utility to create objects. By default, the utility creates objects in the directory in which the commands are run.
5
Optional: By default, the ccoctl utility stores the OpenID Connect (OIDC) configuration files in a public S3 bucket and uses the S3 URL as the public OIDC endpoint. To store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL instead, use the --create-private-s3-bucket parameter.
Note
If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.7.5.2.2.2. Creating AWS resources individually

You can use the ccoctl tool to create AWS resources individually. This option might be useful for an organization that shares the responsibility for creating these resources among different users or departments.

Otherwise, you can use the ccoctl aws create-all command to create the AWS resources automatically. For more information, see "Creating AWS resources with a single command".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Some ccoctl commands make AWS API calls to create or modify AWS resources. You can use the --dry-run flag to avoid making API calls. Using this flag creates JSON files on the local file system instead. You can review and modify the JSON files and then apply them with the AWS CLI tool using the --cli-input-json parameters.

Prerequisites

Extract and prepare the ccoctl binary.

Procedure

Generate the public and private RSA key files that are used to set up the OpenID Connect provider for the cluster by running the following command:
```
$ ccoctl aws create-key-pair
```
Example output
```
2021/04/13 11:01:02 Generating RSA keypair
2021/04/13 11:01:03 Writing private key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.private
2021/04/13 11:01:03 Writing public key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.public
2021/04/13 11:01:03 Copying signing key for use by installer
```
where serviceaccount-signer.private and serviceaccount-signer.public are the generated key files.
This command also creates a private key that the cluster requires during installation in /<path_to_ccoctl_output_dir>/tls/bound-service-account-signing-key.key.
Create an OpenID Connect identity provider and S3 bucket on AWS by running the following command:
```
$ ccoctl aws create-identity-provider \
  --name=<name> \1
  --region=<aws_region> \2
  --public-key-file=<path_to_ccoctl_output_dir>/serviceaccount-signer.public 3
```
1
<name> is the name used to tag any cloud resources that are created for tracking.
2
<aws-region> is the AWS region in which cloud resources will be created.
3
<path_to_ccoctl_output_dir> is the path to the public key file that the ccoctl aws create-key-pair command generated.
Example output
```
2021/04/13 11:16:09 Bucket <name>-oidc created
2021/04/13 11:16:10 OpenID Connect discovery document in the S3 bucket <name>-oidc at .well-known/openid-configuration updated
2021/04/13 11:16:10 Reading public key
2021/04/13 11:16:10 JSON web key set (JWKS) in the S3 bucket <name>-oidc at keys.json updated
2021/04/13 11:16:18 Identity Provider created with ARN: arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
where openid-configuration is a discovery document and keys.json is a JSON web key set file.
This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/cluster-authentication-02-config.yaml. This file sets the issuer URL field for the service account tokens that the cluster generates, so that the AWS IAM identity provider trusts the tokens.
Create IAM roles for each component in the cluster:
1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
2. Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
  1
  The --included parameter includes only the manifests that your specific cluster configuration requires.
  2
  Specify the location of the install-config.yaml file.
  3
  Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-iam-roles \
  --name=<name> \
  --region=<aws_region> \
  --credentials-requests-dir=<path_to_credentials_requests_directory> \
  --identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
  Note
  For AWS environments that use alternative IAM API endpoints, such as GovCloud, you must also specify your region with the --region parameter.
  If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.
  For each CredentialsRequest object, ccoctl creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy as defined in each CredentialsRequest object from the OpenShift Container Platform release image.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.7.5.2.3. Incorporating the Cloud Credential Operator utility manifests

To implement short-term security credentials managed outside the cluster for individual components, you must move the manifest files that the Cloud Credential Operator utility (ccoctl) created to the correct directories for the installation program.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have configured the Cloud Credential Operator utility (ccoctl).
You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:
```
$ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/
```
Copy the tls directory that contains the private key to the installation directory:
```
$ cp -a /<path_to_ccoctl_output_dir>/tls .
```

3.7.6. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.7.7. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.7.8. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

See Accessing the web console for more details about accessing and understanding the OpenShift Container Platform web console.

3.7.9. Next steps

Validating an installation.
Customize your cluster.
If necessary, you can opt out of remote health reporting.
If necessary, you can remove cloud provider credentials.

3.8. Installing a cluster on AWS into a government region

In OpenShift Container Platform version 4.17, you can install a cluster on Amazon Web Services (AWS) into a government region. To configure the region, modify parameters in the install-config.yaml file before you install the cluster.

3.8.1. Prerequisites

You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
Important
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.

3.8.2. AWS government regions

OpenShift Container Platform supports deploying a cluster to an AWS GovCloud (US) region.

The following AWS GovCloud partitions are supported:

us-gov-east-1
us-gov-west-1

3.8.3. Installation requirements

Before you can install the cluster, you must:

Provide an existing private AWS VPC and subnets to host the cluster.
Public zones are not supported in Route 53 in AWS GovCloud. As a result, clusters must be private when you deploy to an AWS government region.
Manually create the installation configuration file (install-config.yaml).

3.8.4. Private clusters

You can deploy a private OpenShift Container Platform cluster that does not expose external endpoints. Private clusters are accessible from only an internal network and are not visible to the internet.

Note

Public zones are not supported in Route 53 in an AWS GovCloud Region. Therefore, clusters must be private if they are deployed to an AWS GovCloud Region.

By default, OpenShift Container Platform is provisioned to use publicly-accessible DNS and endpoints. A private cluster sets the DNS, Ingress Controller, and API server to private when you deploy your cluster. This means that the cluster resources are only accessible from your internal network and are not visible to the internet.

Important

If the cluster has any public subnets, load balancer services created by administrators might be publicly accessible. To ensure cluster security, verify that these services are explicitly annotated as private.

To deploy a private cluster, you must:

Use existing networking that meets your requirements. Your cluster resources might be shared between other clusters on the network.
Deploy from a machine that has access to:
- The API services for the cloud to which you provision.
- The hosts on the network that you provision.
- The internet to obtain installation media.

You can use any machine that meets these access requirements and follows your company’s guidelines. For example, this machine can be a bastion host on your cloud network or a machine that has access to the network through a VPN.

3.8.4.1. Private clusters in AWS

To create a private cluster on Amazon Web Services (AWS), you must provide an existing private VPC and subnets to host the cluster. The installation program must also be able to resolve the DNS records that the cluster requires. The installation program configures the Ingress Operator and API server for access from only the private network.

The cluster still requires access to internet to access the AWS APIs.

The following items are not required or created when you install a private cluster:

Public subnets
Public load balancers, which support public ingress
A public Route 53 zone that matches the baseDomain for the cluster

The installation program does use the baseDomain that you specify to create a private Route 53 zone and the required records for the cluster. The cluster is configured so that the Operators do not create public records for the cluster and all cluster machines are placed in the private subnets that you specify.

3.8.4.1.1. Limitations

The ability to add public functionality to a private cluster is limited.

You cannot make the Kubernetes API endpoints public after installation without taking additional actions, including creating public subnets in the VPC for each availability zone in use, creating a public load balancer, and configuring the control plane security groups to allow traffic from the internet on 6443 (Kubernetes API port).
If you use a public Service type load balancer, you must tag a public subnet in each availability zone with kubernetes.io/cluster/<cluster-infra-id>: shared so that AWS can use them to create public load balancers.

3.8.5. About using a custom VPC

In OpenShift Container Platform 4.17, you can deploy a cluster into existing subnets in an existing Amazon Virtual Private Cloud (VPC) in Amazon Web Services (AWS). By deploying OpenShift Container Platform into an existing AWS VPC, you might be able to avoid limit constraints in new accounts or more easily abide by the operational constraints that your company’s guidelines set. If you cannot obtain the infrastructure creation permissions that are required to create the VPC yourself, use this installation option.

Because the installation program cannot know what other components are also in your existing subnets, it cannot choose subnet CIDRs and so forth on your behalf. You must configure networking for the subnets that you install your cluster to yourself.

3.8.5.1. Requirements for using your VPC

The installation program no longer creates the following components:

Internet gateways
NAT gateways
Subnets
Route tables
VPCs
VPC DHCP options
VPC endpoints

Note

The installation program requires that you use the cloud-provided DNS server. Using a custom DNS server is not supported and causes the installation to fail.

If you use a custom VPC, you must correctly configure it and its subnets for the installation program and the cluster to use. See Create a VPC in the Amazon Web Services documentation for more information about AWS VPC console wizard configurations and creating and managing an AWS VPC.

The installation program cannot:

Subdivide network ranges for the cluster to use.
Set route tables for the subnets.
Set VPC options like DHCP.

You must complete these tasks before you install the cluster. See VPC networking components and Route tables for your VPC for more information on configuring networking in an AWS VPC.

Your VPC must meet the following characteristics:

The VPC must not use the kubernetes.io/cluster/.*: owned, Name, and openshift.io/cluster tags.
The installation program modifies your subnets to add the kubernetes.io/cluster/.*: shared tag, so your subnets must have at least one free tag slot available for it. See Tag Restrictions in the AWS documentation to confirm that the installation program can add a tag to each subnet that you specify. You cannot use a Name tag, because it overlaps with the EC2 Name field and the installation fails.
If you want to extend your OpenShift Container Platform cluster into an AWS Outpost and have an existing Outpost subnet, the existing subnet must use the kubernetes.io/cluster/unmanaged: true tag. If you do not apply this tag, the installation might fail due to the Cloud Controller Manager creating a service load balancer in the Outpost subnet, which is an unsupported configuration.
You must enable the enableDnsSupport and enableDnsHostnames attributes in your VPC, so that the cluster can use the Route 53 zones that are attached to the VPC to resolve cluster’s internal DNS records. See DNS Support in Your VPC in the AWS documentation.
If you prefer to use your own Route 53 hosted private zone, you must associate the existing hosted zone with your VPC prior to installing a cluster. You can define your hosted zone using the platform.aws.hostedZone and platform.aws.hostedZoneRole fields in the install-config.yaml file. You can use a private hosted zone from another account by sharing it with the account where you install the cluster. If you use a private hosted zone from another account, you must use the Passthrough or Manual credentials mode.

If you are working in a disconnected environment, you are unable to reach the public IP addresses for EC2, ELB, and S3 endpoints. Depending on the level to which you want to restrict internet traffic during the installation, the following configuration options are available:

Option 1: Create VPC endpoints

Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

With this option, network traffic remains private between your VPC and the required AWS services.

Option 2: Create a proxy without VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy. With this option, internet traffic goes through the proxy to reach the required AWS services.

Option 3: Create a proxy with VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy with VPC endpoints. Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

When configuring the proxy in the install-config.yaml file, add these endpoints to the noProxy field. With this option, the proxy prevents the cluster from accessing the internet directly. However, network traffic remains private between your VPC and the required AWS services.

Required VPC components

You must provide a suitable VPC and subnets that allow communication to your machines.

Component	AWS type	Description
VPC	`AWS::EC2::VPC` `AWS::EC2::VPCEndpoint`	You must provide a public VPC for the cluster to use. The VPC uses an endpoint that references the route tables for each subnet to improve communication with the registry that is hosted in S3.
Public subnets	`AWS::EC2::Subnet` `AWS::EC2::SubnetNetworkAclAssociation`	Your VPC must have public subnets for between 1 and 3 availability zones and associate them with appropriate Ingress rules.
Internet gateway	`AWS::EC2::InternetGateway` `AWS::EC2::VPCGatewayAttachment` `AWS::EC2::RouteTable` `AWS::EC2::Route` `AWS::EC2::SubnetRouteTableAssociation` `AWS::EC2::NatGateway` `AWS::EC2::EIP`	You must have a public internet gateway, with public routes, attached to the VPC. In the provided templates, each public subnet has a NAT gateway with an EIP address. These NAT gateways allow cluster resources, like private subnet instances, to reach the internet and are not required for some restricted network or proxy scenarios.
Network access control	`AWS::EC2::NetworkAcl` `AWS::EC2::NetworkAclEntry`	You must allow the VPC to access the following ports:
		Port	Reason
		`80`	Inbound HTTP traffic
		`443`	Inbound HTTPS traffic
		`22`	Inbound SSH traffic
		`1024` - `65535`	Inbound ephemeral traffic
		`0` - `65535`	Outbound ephemeral traffic
Private subnets	`AWS::EC2::Subnet` `AWS::EC2::RouteTable` `AWS::EC2::SubnetRouteTableAssociation`	Your VPC can have private subnets. The provided CloudFormation templates can create private subnets for between 1 and 3 availability zones. If you use private subnets, you must provide appropriate routes and tables for them.

3.8.5.2. VPC validation

To ensure that the subnets that you provide are suitable, the installation program confirms the following data:

All the subnets that you specify exist.
You provide private subnets.
The subnet CIDRs belong to the machine CIDR that you specified.
You provide subnets for each availability zone. Each availability zone contains no more than one public and one private subnet. If you use a private cluster, provide only a private subnet for each availability zone. Otherwise, provide exactly one public and private subnet for each availability zone.
You provide a public subnet for each private subnet availability zone. Machines are not provisioned in availability zones that you do not provide private subnets for.

If you destroy a cluster that uses an existing VPC, the VPC is not deleted. When you remove the OpenShift Container Platform cluster from a VPC, the kubernetes.io/cluster/.*: shared tag is removed from the subnets that it used.

3.8.5.3. Division of permissions

Starting with OpenShift Container Platform 4.3, you do not need all of the permissions that are required for an installation program-provisioned infrastructure cluster to deploy a cluster. This change mimics the division of permissions that you might have at your company: some individuals can create different resource in your clouds than others. For example, you might be able to create application-specific items, like instances, buckets, and load balancers, but not networking-related components such as VPCs, subnets, or ingress rules.

The AWS credentials that you use when you create your cluster do not need the networking permissions that are required to make VPCs and core networking components within the VPC, such as subnets, routing tables, internet gateways, NAT, and VPN. You still need permission to make the application resources that the machines within the cluster require, such as ELBs, security groups, S3 buckets, and nodes.

3.8.5.4. Isolation between clusters

If you deploy OpenShift Container Platform to an existing network, the isolation of cluster services is reduced in the following ways:

You can install multiple OpenShift Container Platform clusters in the same VPC.
ICMP ingress is allowed from the entire network.
TCP 22 ingress (SSH) is allowed to the entire network.
Control plane TCP 6443 ingress (Kubernetes API) is allowed to the entire network.
Control plane TCP 22623 ingress (MCS) is allowed to the entire network.

3.8.5.5. Optional: AWS security groups

By default, the installation program creates and attaches security groups to control plane and compute machines. The rules associated with the default security groups cannot be modified.

However, you can apply additional existing AWS security groups, which are associated with your existing VPC, to control plane and compute machines. Applying custom security groups can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

As part of the installation process, you apply custom security groups by modifying the install-config.yaml file before deploying the cluster.

For more information, see "Applying existing AWS security groups to the cluster".

3.8.6. Obtaining an AWS Marketplace image

If you are deploying an OpenShift Container Platform cluster using an AWS Marketplace image, you must first subscribe through AWS. Subscribing to the offer provides you with the AMI ID that the installation program uses to deploy compute nodes.

Prerequisites

You have an AWS account to purchase the offer. This account does not have to be the same account that is used to install the cluster.

Procedure

Complete the OpenShift Container Platform subscription from the AWS Marketplace.
Record the AMI ID for your specific AWS Region. As part of the installation process, you must update the install-config.yaml file with this value before deploying the cluster.
Sample install-config.yaml file with AWS Marketplace compute nodes
```
apiVersion: v1
baseDomain: example.com
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      amiID: ami-06c4d345f7c207239 1
      type: m5.4xlarge
  replicas: 3
metadata:
  name: test-cluster
platform:
  aws:
    region: us-east-2 2
sshKey: ssh-ed25519 AAAA...
pullSecret: '{"auths": ...}'
```
1
The AMI ID from your AWS Marketplace subscription.
2
Your AMI ID is associated with a specific AWS Region. When creating the installation configuration file, ensure that you select the same AWS Region that you specified when configuring your subscription.

3.8.7. Manually creating the installation configuration file

Installing the cluster requires that you manually create the installation configuration file.

Prerequisites

You have an SSH public key on your local machine to provide to the installation program. The key will be used for SSH authentication onto your cluster nodes for debugging and disaster recovery.
You have obtained the OpenShift Container Platform installation program and the pull secret for your cluster.

Procedure

Create an installation directory to store your required installation assets in:
```
$ mkdir <installation_directory>
```
Important
You must create a directory. Some installation assets, like bootstrap X.509 certificates have short expiration intervals, so you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
Customize the sample install-config.yaml file template that is provided and save it in the <installation_directory>.
Note
You must name this configuration file install-config.yaml.
Back up the install-config.yaml file so that you can use it to install multiple clusters.
Important
The install-config.yaml file is consumed during the next step of the installation process. You must back it up now.

Additional resources

Installation configuration parameters for AWS

3.8.7.1. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.16. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

Additional resources

Optimizing storage

3.8.7.2. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.20. Machine types based on 64-bit x86 architecture

c4.*
c5.*
c5a.*
i3.*
m4.*
m5.*
m5a.*
m6a.*
m6i.*
r4.*
r5.*
r5a.*
r6i.*
t3.*
t3a.*

3.8.7.3. Tested instance types for AWS on 64-bit ARM infrastructures

The following Amazon Web Services (AWS) 64-bit ARM instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS ARM instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in "Minimum resource requirements for cluster installation".

Example 3.21. Machine types based on 64-bit ARM architecture

c6g.*
c7g.*
m6g.*
m7g.*
r8g.*

3.8.7.4. Sample customized install-config.yaml file for AWS

You can customize the installation configuration file (install-config.yaml) to specify more details about your OpenShift Container Platform cluster’s platform or modify the values of the required parameters.

Important

This sample YAML file is provided for reference only. Use it as a resource to enter parameter values into the installation configuration file that you created manually.

apiVersion: v1
baseDomain: example.com 1
credentialsMode: Mint 2
controlPlane: 3 4
  hyperthreading: Enabled 5
  name: master
  platform:
    aws:
      zones:
      - us-gov-west-1a
      - us-gov-west-1b
      rootVolume:
        iops: 4000
        size: 500
        type: io1 6
      metadataService:
        authentication: Optional 7
      type: m6i.xlarge
  replicas: 3
compute: 8
- hyperthreading: Enabled 9
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1 10
      metadataService:
        authentication: Optional 11
      type: c5.4xlarge
      zones:
      - us-gov-west-1c
  replicas: 3
metadata:
  name: test-cluster 12
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 13
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: us-gov-west-1 14
    propagateUserTags: true 15
    userTags:
      adminContact: jdoe
      costCenter: 7536
    subnets: 16
    - subnet-1
    - subnet-2
    - subnet-3
    amiID: ami-0c5d3e03c0ab9b19a 17
    serviceEndpoints: 18
      - name: ec2
        url: https://vpce-id.ec2.us-west-2.vpce.amazonaws.com
    hostedZone: Z3URY6TWQ91KVV 19
fips: false 20
sshKey: ssh-ed25519 AAAA... 21
publish: Internal 22
pullSecret: '{"auths": ...}' 23

1 12 14 23: Required.
2: Optional: Add this parameter to force the Cloud Credential Operator (CCO) to use the specified mode. By default, the CCO uses the root credentials in the kube-system namespace to dynamically try to determine the capabilities of the credentials. For details about CCO modes, see the "About the Cloud Credential Operator" section in the Authentication and authorization guide.
3 8 15: If you do not provide these parameters and values, the installation program provides the default value.
4: The controlPlane section is a single mapping, but the compute section is a sequence of mappings. To meet the requirements of the different data structures, the first line of the compute section must begin with a hyphen, -, and the first line of the controlPlane section must not. Only one control plane pool is used.
5 9: Whether to enable or disable simultaneous multithreading, or hyperthreading. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to Disabled. If you disable simultaneous multithreading in some cluster machines, you must disable it in all cluster machines.
Important
If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance. Use larger instance types, such as m4.2xlarge or m5.2xlarge, for your machines if you disable simultaneous multithreading.
6 10: To configure faster storage for etcd, especially for larger clusters, set the storage type as io1 and set iops to 2000.
7 11: Whether to require the Amazon EC2 Instance Metadata Service v2 (IMDSv2). To require IMDSv2, set the parameter value to Required. To allow the use of both IMDSv1 and IMDSv2, set the parameter value to Optional. If no value is specified, both IMDSv1 and IMDSv2 are allowed.
Note
The IMDS configuration for control plane machines that is set during cluster installation can only be changed by using the AWS CLI. The IMDS configuration for compute machines can be changed by using compute machine sets.
13: The cluster network plugin to install. The default value OVNKubernetes is the only supported value.
16: If you provide your own VPC, specify subnets for each availability zone that your cluster uses.
17: The ID of the AMI used to boot machines for the cluster. If set, the AMI must belong to the same region as the cluster.
18: The AWS service endpoints. Custom endpoints are required when installing to an unknown AWS region. The endpoint URL must use the https protocol and the host must trust the certificate.
19: The ID of your existing Route 53 private hosted zone. Providing an existing hosted zone requires that you supply your own VPC and the hosted zone is already associated with the VPC prior to installing your cluster. If undefined, the installation program creates a new hosted zone.
20: Whether to enable or disable FIPS mode. By default, FIPS mode is not enabled. If FIPS mode is enabled, the Red Hat Enterprise Linux CoreOS (RHCOS) machines that OpenShift Container Platform runs on bypass the default Kubernetes cryptography suite and use the cryptography modules that are provided with RHCOS instead.
Important
To enable FIPS mode for your cluster, you must run the installation program from a Red Hat Enterprise Linux (RHEL) computer configured to operate in FIPS mode. For more information about configuring FIPS mode on RHEL, see Switching RHEL to FIPS mode.
When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.
21: You can optionally provide the sshKey value that you use to access the machines in your cluster.
Note
For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
22: How to publish the user-facing endpoints of your cluster. Set publish to Internal to deploy a private cluster, which cannot be accessed from the internet. The default value is External.

3.8.7.5. Configuring the cluster-wide proxy during installation

Production environments can deny direct access to the internet and instead have an HTTP or HTTPS proxy available. You can configure a new OpenShift Container Platform cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

You have an existing install-config.yaml file.
You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.
Note
The Proxy object status.noProxy field is populated with the values of the networking.machineNetwork[].cidr, networking.clusterNetwork[].cidr, and networking.serviceNetwork[] fields from your installation configuration.
For installations on Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, and Red Hat OpenStack Platform (RHOSP), the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

Edit your install-config.yaml file and add the proxy settings. For example:
```
apiVersion: v1
baseDomain: my.domain.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port> 1
  httpsProxy: https://<username>:<pswd>@<ip>:<port> 2
  noProxy: ec2.<aws_region>.amazonaws.com,elasticloadbalancing.<aws_region>.amazonaws.com,s3.<aws_region>.amazonaws.com 3
additionalTrustBundle: | 4
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> 5
```
1
A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
2
A proxy URL to use for creating HTTPS connections outside the cluster.
3
A comma-separated list of destination domain names, IP addresses, or other network CIDRs to exclude from proxying. Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass the proxy for all destinations. If you have added the Amazon EC2,Elastic Load Balancing, and S3 VPC endpoints to your VPC, you must add these endpoints to the noProxy field.
4
If provided, the installation program generates a config map that is named user-ca-bundle in the openshift-config namespace that contains one or more additional CA certificates that are required for proxying HTTPS connections. The Cluster Network Operator then creates a trusted-ca-bundle config map that merges these contents with the Red Hat Enterprise Linux CoreOS (RHCOS) trust bundle, and this config map is referenced in the trustedCA field of the Proxy object. The additionalTrustBundle field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.
5
Optional: The policy to determine the configuration of the Proxy object to reference the user-ca-bundle config map in the trustedCA field. The allowed values are Proxyonly and Always. Use Proxyonly to reference the user-ca-bundle config map only when http/https proxy is configured. Use Always to always reference the user-ca-bundle config map. The default value is Proxyonly.
Note
The installation program does not support the proxy readinessEndpoints field.
Note
If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:
```
$ ./openshift-install wait-for install-complete --log-level debug
```
Save the file and reference it when installing OpenShift Container Platform.

The installation program creates a cluster-wide proxy that is named cluster that uses the proxy settings in the provided install-config.yaml file. If no proxy settings are provided, a cluster Proxy object is still created, but it will have a nil spec.

Note

Only the Proxy object named cluster is supported, and no additional proxies can be created.

3.8.7.6. Applying existing AWS security groups to the cluster

Applying existing AWS security groups to your control plane and compute machines can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

Prerequisites

You have created the security groups in AWS. For more information, see the AWS documentation about working with security groups.
The security groups must be associated with the existing VPC that you are deploying the cluster to. The security groups cannot be associated with another VPC.
You have an existing install-config.yaml file.

Procedure

In the install-config.yaml file, edit the compute.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your compute machines.
Edit the controlPlane.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your control plane machines.
Save the file and reference it when deploying the cluster.

Sample install-config.yaml file that specifies custom security groups

# ...
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-1 1
        - sg-2
  replicas: 3
controlPlane:
  hyperthreading: Enabled
  name: master
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-3
        - sg-4
  replicas: 3
platform:
  aws:
    region: us-east-1
    subnets: 2
      - subnet-1
      - subnet-2
      - subnet-3

1: Specify the name of the security group as it appears in the Amazon EC2 console, including the sg prefix.
2: Specify subnets for each availability zone that your cluster uses.

3.8.8. Alternatives to storing administrator-level secrets in the kube-system project

By default, administrator secrets are stored in the kube-system project. If you configured the credentialsMode parameter in the install-config.yaml file to Manual, you must use one of the following alternatives:

To manage long-term cloud credentials manually, follow the procedure in Manually creating long-term credentials.
To implement short-term credentials that are managed outside the cluster for individual components, follow the procedures in Incorporating the Cloud Credential Operator utility manifests.

3.8.8.1. Manually creating long-term credentials

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```

Extract the list of CredentialsRequest custom resources (CRs) from the OpenShift Container Platform release image by running the following command:

$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3

1: The --included parameter includes only the manifests that your specific cluster configuration requires.
2: Specify the location of the install-config.yaml file.
3: Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

This command creates a YAML file for each CredentialsRequest object.

Sample CredentialsRequest object

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - iam:GetUser
      - iam:GetUserPolicy
      - iam:ListAccessKeys
      resource: "*"
  ...

Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object.

Sample CredentialsRequest object with secrets

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - s3:CreateBucket
      - s3:DeleteBucket
      resource: "*"
      ...
  secretRef:
    name: <component_secret>
    namespace: <component_namespace>
  ...

Sample Secret object

apiVersion: v1
kind: Secret
metadata:
  name: <component_secret>
  namespace: <component_namespace>
data:
  aws_access_key_id: <base64_encoded_aws_access_key_id>
  aws_secret_access_key: <base64_encoded_aws_secret_access_key>

Important

Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

3.8.8.2. Configuring an AWS cluster to use short-term credentials

To install a cluster that is configured to use the AWS Security Token Service (STS), you must configure the CCO utility and create the required AWS resources for your cluster.

3.8.8.2.1. Configuring the Cloud Credential Operator utility

To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.

Note

The ccoctl utility is a Linux binary that must run in a Linux environment.

Prerequisites

You have access to an OpenShift Container Platform account with cluster administrator access.
You have installed the OpenShift CLI (oc).

You have created an AWS account for the ccoctl utility to use with the following permissions:
Example 3.22. Required AWS permissions
Required iam permissions
- iam:CreateOpenIDConnectProvider
- iam:CreateRole
- iam:DeleteOpenIDConnectProvider
- iam:DeleteRole
- iam:DeleteRolePolicy
- iam:GetOpenIDConnectProvider
- iam:GetRole
- iam:GetUser
- iam:ListOpenIDConnectProviders
- iam:ListRolePolicies
- iam:ListRoles
- iam:PutRolePolicy
- iam:TagOpenIDConnectProvider
- iam:TagRole
Required s3 permissions
- s3:CreateBucket
- s3:DeleteBucket
- s3:DeleteObject
- s3:GetBucketAcl
- s3:GetBucketTagging
- s3:GetObject
- s3:GetObjectAcl
- s3:GetObjectTagging
- s3:ListBucket
- s3:PutBucketAcl
- s3:PutBucketPolicy
- s3:PutBucketPublicAccessBlock
- s3:PutBucketTagging
- s3:PutObject
- s3:PutObjectAcl
- s3:PutObjectTagging
Required cloudfront permissions
- cloudfront:ListCloudFrontOriginAccessIdentities
- cloudfront:ListDistributions
- cloudfront:ListTagsForResource
If you plan to store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL, the AWS account that runs the ccoctl utility requires the following additional permissions:
Example 3.23. Additional permissions for a private S3 bucket with CloudFront
- cloudfront:CreateCloudFrontOriginAccessIdentity
- cloudfront:CreateDistribution
- cloudfront:DeleteCloudFrontOriginAccessIdentity
- cloudfront:DeleteDistribution
- cloudfront:GetCloudFrontOriginAccessIdentity
- cloudfront:GetCloudFrontOriginAccessIdentityConfig
- cloudfront:GetDistribution
- cloudfront:TagResource
- cloudfront:UpdateDistribution
Note
These additional permissions support the use of the --create-private-s3-bucket option when processing credentials requests with the ccoctl aws create-all command.

Procedure

Set a variable for the OpenShift Container Platform release image by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
```
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
```
Note
Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.
Extract the ccoctl binary from the CCO container image within the OpenShift Container Platform release image by running the following command:
```
$ oc image extract $CCO_IMAGE \
  --file="/usr/bin/ccoctl.<rhel_version>" \1
  -a ~/.pull-secret
```
1
For <rhel_version>, specify the value that corresponds to the version of Red Hat Enterprise Linux (RHEL) that the host uses. If no value is specified, ccoctl.rhel8 is used by default. The following values are valid:
rhel8: Specify this value for hosts that use RHEL 8.
rhel9: Specify this value for hosts that use RHEL 9.
Change the permissions to make ccoctl executable by running the following command:
```
$ chmod 775 ccoctl.<rhel_version>
```

Verification

To verify that ccoctl is ready to use, display the help file. Use a relative file name when you run the command, for example:

$ ./ccoctl.rhel9

Example output

OpenShift credentials provisioning tool

Usage:
  ccoctl [command]

Available Commands:
  aws          Manage credentials objects for AWS cloud
  azure        Manage credentials objects for Azure
  gcp          Manage credentials objects for Google cloud
  help         Help about any command
  ibmcloud     Manage credentials objects for {ibm-cloud-title}
  nutanix      Manage credentials objects for Nutanix

Flags:
  -h, --help   help for ccoctl

Use "ccoctl [command] --help" for more information about a command.

3.8.8.2.2. Creating AWS resources with the Cloud Credential Operator utility

You have the following options when creating AWS resources:

You can use the ccoctl aws create-all command to create the AWS resources automatically. This is the quickest way to create the resources. See Creating AWS resources with a single command.
If you need to review the JSON files that the ccoctl tool creates before modifying AWS resources, or if the process the ccoctl tool uses to create AWS resources automatically does not meet the requirements of your organization, you can create the AWS resources individually. See Creating AWS resources individually.

3.8.8.2.2.1. Creating AWS resources with a single command

If the process the ccoctl tool uses to create AWS resources automatically meets the requirements of your organization, you can use the ccoctl aws create-all command to automate the creation of AWS resources.

Otherwise, you can create the AWS resources individually. For more information, see "Creating AWS resources individually".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Prerequisites

You must have:

Extracted and prepared the ccoctl binary.

Procedure

Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image by running the following command:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
1
The --included parameter includes only the manifests that your specific cluster configuration requires.
2
Specify the location of the install-config.yaml file.
3
Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
Note
This command might take a few moments to run.
Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-all \
  --name=<name> \1
  --region=<aws_region> \2
  --credentials-requests-dir=<path_to_credentials_requests_directory> \3
  --output-dir=<path_to_ccoctl_output_dir> \4
  --create-private-s3-bucket 5
```
1
Specify the name used to tag any cloud resources that are created for tracking.
2
Specify the AWS region in which cloud resources will be created.
3
Specify the directory containing the files for the component CredentialsRequest objects.
4
Optional: Specify the directory in which you want the ccoctl utility to create objects. By default, the utility creates objects in the directory in which the commands are run.
5
Optional: By default, the ccoctl utility stores the OpenID Connect (OIDC) configuration files in a public S3 bucket and uses the S3 URL as the public OIDC endpoint. To store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL instead, use the --create-private-s3-bucket parameter.
Note
If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.8.8.2.2.2. Creating AWS resources individually

You can use the ccoctl tool to create AWS resources individually. This option might be useful for an organization that shares the responsibility for creating these resources among different users or departments.

Otherwise, you can use the ccoctl aws create-all command to create the AWS resources automatically. For more information, see "Creating AWS resources with a single command".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Some ccoctl commands make AWS API calls to create or modify AWS resources. You can use the --dry-run flag to avoid making API calls. Using this flag creates JSON files on the local file system instead. You can review and modify the JSON files and then apply them with the AWS CLI tool using the --cli-input-json parameters.

Prerequisites

Extract and prepare the ccoctl binary.

Procedure

Generate the public and private RSA key files that are used to set up the OpenID Connect provider for the cluster by running the following command:
```
$ ccoctl aws create-key-pair
```
Example output
```
2021/04/13 11:01:02 Generating RSA keypair
2021/04/13 11:01:03 Writing private key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.private
2021/04/13 11:01:03 Writing public key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.public
2021/04/13 11:01:03 Copying signing key for use by installer
```
where serviceaccount-signer.private and serviceaccount-signer.public are the generated key files.
This command also creates a private key that the cluster requires during installation in /<path_to_ccoctl_output_dir>/tls/bound-service-account-signing-key.key.
Create an OpenID Connect identity provider and S3 bucket on AWS by running the following command:
```
$ ccoctl aws create-identity-provider \
  --name=<name> \1
  --region=<aws_region> \2
  --public-key-file=<path_to_ccoctl_output_dir>/serviceaccount-signer.public 3
```
1
<name> is the name used to tag any cloud resources that are created for tracking.
2
<aws-region> is the AWS region in which cloud resources will be created.
3
<path_to_ccoctl_output_dir> is the path to the public key file that the ccoctl aws create-key-pair command generated.
Example output
```
2021/04/13 11:16:09 Bucket <name>-oidc created
2021/04/13 11:16:10 OpenID Connect discovery document in the S3 bucket <name>-oidc at .well-known/openid-configuration updated
2021/04/13 11:16:10 Reading public key
2021/04/13 11:16:10 JSON web key set (JWKS) in the S3 bucket <name>-oidc at keys.json updated
2021/04/13 11:16:18 Identity Provider created with ARN: arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
where openid-configuration is a discovery document and keys.json is a JSON web key set file.
This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/cluster-authentication-02-config.yaml. This file sets the issuer URL field for the service account tokens that the cluster generates, so that the AWS IAM identity provider trusts the tokens.
Create IAM roles for each component in the cluster:
1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
2. Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
  1
  The --included parameter includes only the manifests that your specific cluster configuration requires.
  2
  Specify the location of the install-config.yaml file.
  3
  Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-iam-roles \
  --name=<name> \
  --region=<aws_region> \
  --credentials-requests-dir=<path_to_credentials_requests_directory> \
  --identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
  Note
  For AWS environments that use alternative IAM API endpoints, such as GovCloud, you must also specify your region with the --region parameter.
  If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.
  For each CredentialsRequest object, ccoctl creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy as defined in each CredentialsRequest object from the OpenShift Container Platform release image.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.8.8.2.3. Incorporating the Cloud Credential Operator utility manifests

To implement short-term security credentials managed outside the cluster for individual components, you must move the manifest files that the Cloud Credential Operator utility (ccoctl) created to the correct directories for the installation program.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have configured the Cloud Credential Operator utility (ccoctl).
You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:
```
$ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/
```
Copy the tls directory that contains the private key to the installation directory:
```
$ cp -a /<path_to_ccoctl_output_dir>/tls .
```

3.8.9. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.8.10. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.8.11. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

See Accessing the web console for more details about accessing and understanding the OpenShift Container Platform web console.

3.8.12. Next steps

Validating an installation.
Customize your cluster.
If necessary, you can opt out of remote health reporting.
If necessary, you can remove cloud provider credentials.

3.9. Installing a cluster on AWS into a Secret or Top Secret Region

In OpenShift Container Platform version 4.17, you can install a cluster on Amazon Web Services (AWS) into the following secret regions:

Secret Commercial Cloud Services (SC2S)
Commercial Cloud Services (C2S)

To configure a cluster in either region, you change parameters in the install config.yaml file before you install the cluster.

Warning

In OpenShift Container Platform 4.17, the installation program uses Cluster API instead of Terraform to provision cluster infrastructure during installations on AWS. Installing a cluster on AWS into a secret or top-secret region by using the Cluster API implementation has not been tested as of the release of OpenShift Container Platform 4.17. This document will be updated when installation into a secret region has been tested.

There is a known issue with Network Load Balancers' support for security groups in secret or top secret regions that causes installations in these regions to fail. For more information, see OCPBUGS-33311.

3.9.1. Prerequisites

You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
Important
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multifactor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.

3.9.2. AWS secret regions

The following AWS secret partitions are supported:

us-isob-east-1 (SC2S)
us-iso-east-1 (C2S)

Note

The maximum supported MTU in an AWS SC2S and C2S Regions is not the same as AWS commercial. For more information about configuring MTU during installation, see the Cluster Network Operator configuration object section in Installing a cluster on AWS with network customizations

3.9.3. Installation requirements

Red Hat does not publish a Red Hat Enterprise Linux CoreOS (RHCOS) Amzaon Machine Image for the AWS Secret and Top Secret Regions.

Before you can install the cluster, you must:

Upload a custom RHCOS AMI.
Manually create the installation configuration file (install-config.yaml).
Specify the AWS region, and the accompanying custom AMI, in the installation configuration file.

You cannot use the OpenShift Container Platform installation program to create the installation configuration file. The installer does not list an AWS region without native support for an RHCOS AMI.

Important

You must also define a custom CA certificate in the additionalTrustBundle field of the install-config.yaml file because the AWS API requires a custom CA trust bundle. To allow the installation program to access the AWS API, the CA certificates must also be defined on the machine that runs the installation program. You must add the CA bundle to the trust store on the machine, use the AWS_CA_BUNDLE environment variable, or define the CA bundle in the ca_bundle field of the AWS config file.

3.9.4. Private clusters

You can deploy a private OpenShift Container Platform cluster that does not expose external endpoints. Private clusters are accessible from only an internal network and are not visible to the internet.

Note

Public zones are not supported in Route 53 in an AWS Top Secret Region. Therefore, clusters must be private if they are deployed to an AWS Top Secret Region.

By default, OpenShift Container Platform is provisioned to use publicly-accessible DNS and endpoints. A private cluster sets the DNS, Ingress Controller, and API server to private when you deploy your cluster. This means that the cluster resources are only accessible from your internal network and are not visible to the internet.

Important

If the cluster has any public subnets, load balancer services created by administrators might be publicly accessible. To ensure cluster security, verify that these services are explicitly annotated as private.

To deploy a private cluster, you must:

Use existing networking that meets your requirements. Your cluster resources might be shared between other clusters on the network.
Deploy from a machine that has access to:
- The API services for the cloud to which you provision.
- The hosts on the network that you provision.
- The internet to obtain installation media.

You can use any machine that meets these access requirements and follows your company’s guidelines. For example, this machine can be a bastion host on your cloud network or a machine that has access to the network through a VPN.

3.9.4.1. Private clusters in AWS

To create a private cluster on Amazon Web Services (AWS), you must provide an existing private VPC and subnets to host the cluster. The installation program must also be able to resolve the DNS records that the cluster requires. The installation program configures the Ingress Operator and API server for access from only the private network.

The cluster still requires access to internet to access the AWS APIs.

The following items are not required or created when you install a private cluster:

Public subnets
Public load balancers, which support public ingress
A public Route 53 zone that matches the baseDomain for the cluster

The installation program does use the baseDomain that you specify to create a private Route 53 zone and the required records for the cluster. The cluster is configured so that the Operators do not create public records for the cluster and all cluster machines are placed in the private subnets that you specify.

3.9.4.1.1. Limitations

The ability to add public functionality to a private cluster is limited.

You cannot make the Kubernetes API endpoints public after installation without taking additional actions, including creating public subnets in the VPC for each availability zone in use, creating a public load balancer, and configuring the control plane security groups to allow traffic from the internet on 6443 (Kubernetes API port).
If you use a public Service type load balancer, you must tag a public subnet in each availability zone with kubernetes.io/cluster/<cluster-infra-id>: shared so that AWS can use them to create public load balancers.

3.9.5. About using a custom VPC

In OpenShift Container Platform 4.17, you can deploy a cluster into existing subnets in an existing Amazon Virtual Private Cloud (VPC) in Amazon Web Services (AWS). By deploying OpenShift Container Platform into an existing AWS VPC, you might be able to avoid limit constraints in new accounts or more easily abide by the operational constraints that your company’s guidelines set. If you cannot obtain the infrastructure creation permissions that are required to create the VPC yourself, use this installation option.

Because the installation program cannot know what other components are also in your existing subnets, it cannot choose subnet CIDRs and so forth on your behalf. You must configure networking for the subnets that you install your cluster to yourself.

3.9.5.1. Requirements for using your VPC

The installation program no longer creates the following components:

Internet gateways
NAT gateways
Subnets
Route tables
VPCs
VPC DHCP options
VPC endpoints

Note

The installation program requires that you use the cloud-provided DNS server. Using a custom DNS server is not supported and causes the installation to fail.

If you use a custom VPC, you must correctly configure it and its subnets for the installation program and the cluster to use. See Create a VPC in the Amazon Web Services documentation for more information about AWS VPC console wizard configurations and creating and managing an AWS VPC.

The installation program cannot:

Subdivide network ranges for the cluster to use.
Set route tables for the subnets.
Set VPC options like DHCP.

You must complete these tasks before you install the cluster. See VPC networking components and Route tables for your VPC for more information on configuring networking in an AWS VPC.

Your VPC must meet the following characteristics:

The VPC must not use the kubernetes.io/cluster/.*: owned, Name, and openshift.io/cluster tags.
The installation program modifies your subnets to add the kubernetes.io/cluster/.*: shared tag, so your subnets must have at least one free tag slot available for it. See Tag Restrictions in the AWS documentation to confirm that the installation program can add a tag to each subnet that you specify. You cannot use a Name tag, because it overlaps with the EC2 Name field and the installation fails.
If you want to extend your OpenShift Container Platform cluster into an AWS Outpost and have an existing Outpost subnet, the existing subnet must use the kubernetes.io/cluster/unmanaged: true tag. If you do not apply this tag, the installation might fail due to the Cloud Controller Manager creating a service load balancer in the Outpost subnet, which is an unsupported configuration.
You must enable the enableDnsSupport and enableDnsHostnames attributes in your VPC, so that the cluster can use the Route 53 zones that are attached to the VPC to resolve cluster’s internal DNS records. See DNS Support in Your VPC in the AWS documentation.
If you prefer to use your own Route 53 hosted private zone, you must associate the existing hosted zone with your VPC prior to installing a cluster. You can define your hosted zone using the platform.aws.hostedZone and platform.aws.hostedZoneRole fields in the install-config.yaml file. You can use a private hosted zone from another account by sharing it with the account where you install the cluster. If you use a private hosted zone from another account, you must use the Passthrough or Manual credentials mode.

A cluster in an SC2S or C2S Region is unable to reach the public IP addresses for the EC2, ELB, and S3 endpoints. Depending on the level to which you want to restrict internet traffic during the installation, the following configuration options are available:

Option 1: Create VPC endpoints

Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

SC2S

elasticloadbalancing.<aws_region>.sc2s.sgov.gov
ec2.<aws_region>.sc2s.sgov.gov
s3.<aws_region>.sc2s.sgov.gov

C2S

elasticloadbalancing.<aws_region>.c2s.ic.gov
ec2.<aws_region>.c2s.ic.gov
s3.<aws_region>.c2s.ic.gov

With this option, network traffic remains private between your VPC and the required AWS services.

Option 2: Create a proxy without VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy. With this option, internet traffic goes through the proxy to reach the required AWS services.

Option 3: Create a proxy with VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy with VPC endpoints. Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

SC2S

elasticloadbalancing.<aws_region>.sc2s.sgov.gov
ec2.<aws_region>.sc2s.sgov.gov
s3.<aws_region>.sc2s.sgov.gov

C2S

elasticloadbalancing.<aws_region>.c2s.ic.gov
ec2.<aws_region>.c2s.ic.gov
s3.<aws_region>.c2s.ic.gov

When configuring the proxy in the install-config.yaml file, add these endpoints to the noProxy field. With this option, the proxy prevents the cluster from accessing the internet directly. However, network traffic remains private between your VPC and the required AWS services.

Required VPC components

You must provide a suitable VPC and subnets that allow communication to your machines.

Component	AWS type	Description
VPC	`AWS::EC2::VPC` `AWS::EC2::VPCEndpoint`	You must provide a public VPC for the cluster to use. The VPC uses an endpoint that references the route tables for each subnet to improve communication with the registry that is hosted in S3.
Public subnets	`AWS::EC2::Subnet` `AWS::EC2::SubnetNetworkAclAssociation`	Your VPC must have public subnets for between 1 and 3 availability zones and associate them with appropriate Ingress rules.
Internet gateway	`AWS::EC2::InternetGateway` `AWS::EC2::VPCGatewayAttachment` `AWS::EC2::RouteTable` `AWS::EC2::Route` `AWS::EC2::SubnetRouteTableAssociation` `AWS::EC2::NatGateway` `AWS::EC2::EIP`	You must have a public internet gateway, with public routes, attached to the VPC. In the provided templates, each public subnet has a NAT gateway with an EIP address. These NAT gateways allow cluster resources, like private subnet instances, to reach the internet and are not required for some restricted network or proxy scenarios.
Network access control	`AWS::EC2::NetworkAcl` `AWS::EC2::NetworkAclEntry`	You must allow the VPC to access the following ports:
		Port	Reason
		`80`	Inbound HTTP traffic
		`443`	Inbound HTTPS traffic
		`22`	Inbound SSH traffic
		`1024` - `65535`	Inbound ephemeral traffic
		`0` - `65535`	Outbound ephemeral traffic
Private subnets	`AWS::EC2::Subnet` `AWS::EC2::RouteTable` `AWS::EC2::SubnetRouteTableAssociation`	Your VPC can have private subnets. The provided CloudFormation templates can create private subnets for between 1 and 3 availability zones. If you use private subnets, you must provide appropriate routes and tables for them.

3.9.5.2. VPC validation

To ensure that the subnets that you provide are suitable, the installation program confirms the following data:

All the subnets that you specify exist.
You provide private subnets.
The subnet CIDRs belong to the machine CIDR that you specified.
You provide subnets for each availability zone. Each availability zone contains no more than one public and one private subnet. If you use a private cluster, provide only a private subnet for each availability zone. Otherwise, provide exactly one public and private subnet for each availability zone.
You provide a public subnet for each private subnet availability zone. Machines are not provisioned in availability zones that you do not provide private subnets for.

If you destroy a cluster that uses an existing VPC, the VPC is not deleted. When you remove the OpenShift Container Platform cluster from a VPC, the kubernetes.io/cluster/.*: shared tag is removed from the subnets that it used.

3.9.5.3. Division of permissions

Starting with OpenShift Container Platform 4.3, you do not need all of the permissions that are required for an installation program-provisioned infrastructure cluster to deploy a cluster. This change mimics the division of permissions that you might have at your company: some individuals can create different resource in your clouds than others. For example, you might be able to create application-specific items, like instances, buckets, and load balancers, but not networking-related components such as VPCs, subnets, or ingress rules.

The AWS credentials that you use when you create your cluster do not need the networking permissions that are required to make VPCs and core networking components within the VPC, such as subnets, routing tables, internet gateways, NAT, and VPN. You still need permission to make the application resources that the machines within the cluster require, such as ELBs, security groups, S3 buckets, and nodes.

3.9.5.4. Isolation between clusters

If you deploy OpenShift Container Platform to an existing network, the isolation of cluster services is reduced in the following ways:

You can install multiple OpenShift Container Platform clusters in the same VPC.
ICMP ingress is allowed from the entire network.
TCP 22 ingress (SSH) is allowed to the entire network.
Control plane TCP 6443 ingress (Kubernetes API) is allowed to the entire network.
Control plane TCP 22623 ingress (MCS) is allowed to the entire network.

3.9.5.5. Optional: AWS security groups

By default, the installation program creates and attaches security groups to control plane and compute machines. The rules associated with the default security groups cannot be modified.

However, you can apply additional existing AWS security groups, which are associated with your existing VPC, to control plane and compute machines. Applying custom security groups can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

As part of the installation process, you apply custom security groups by modifying the install-config.yaml file before deploying the cluster.

For more information, see "Applying existing AWS security groups to the cluster".

3.9.6. Uploading a custom RHCOS AMI in AWS

If you are deploying to a custom Amazon Web Services (AWS) region, you must upload a custom Red Hat Enterprise Linux CoreOS (RHCOS) Amazon Machine Image (AMI) that belongs to that region.

Prerequisites

You configured an AWS account.
You created an Amazon S3 bucket with the required IAM service role.
You uploaded your RHCOS VMDK file to Amazon S3. The RHCOS VMDK file must be the highest version that is less than or equal to the OpenShift Container Platform version you are installing.
You downloaded the AWS CLI and installed it on your computer. See Install the AWS CLI Using the Bundled Installer.

Procedure

Export your AWS profile as an environment variable:
```
$ export AWS_PROFILE=<aws_profile> 1
```
Export the region to associate with your custom AMI as an environment variable:
```
$ export AWS_DEFAULT_REGION=<aws_region> 1
```
Export the version of RHCOS you uploaded to Amazon S3 as an environment variable:
```
$ export RHCOS_VERSION=<version> 1
```
1 1 1
The RHCOS VMDK version, like 4.17.0.
Export the Amazon S3 bucket name as an environment variable:
```
$ export VMIMPORT_BUCKET_NAME=<s3_bucket_name>
```

Create the containers.json file and define your RHCOS VMDK file:

$ cat <<EOF > containers.json
{
   "Description": "rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64",
   "Format": "vmdk",
   "UserBucket": {
      "S3Bucket": "${VMIMPORT_BUCKET_NAME}",
      "S3Key": "rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64.vmdk"
   }
}
EOF

Import the RHCOS disk as an Amazon EBS snapshot:
```
$ aws ec2 import-snapshot --region ${AWS_DEFAULT_REGION} \
     --description "<description>" \ 1
     --disk-container "file://<file_path>/containers.json" 2
```
1
The description of your RHCOS disk being imported, like rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64.
2
The file path to the JSON file describing your RHCOS disk. The JSON file should contain your Amazon S3 bucket name and key.

Check the status of the image import:

$ watch -n 5 aws ec2 describe-import-snapshot-tasks --region ${AWS_DEFAULT_REGION}

Example output

{
    "ImportSnapshotTasks": [
        {
            "Description": "rhcos-4.7.0-x86_64-aws.x86_64",
            "ImportTaskId": "import-snap-fh6i8uil",
            "SnapshotTaskDetail": {
                "Description": "rhcos-4.7.0-x86_64-aws.x86_64",
                "DiskImageSize": 819056640.0,
                "Format": "VMDK",
                "SnapshotId": "snap-06331325870076318",
                "Status": "completed",
                "UserBucket": {
                    "S3Bucket": "external-images",
                    "S3Key": "rhcos-4.7.0-x86_64-aws.x86_64.vmdk"
                }
            }
        }
    ]
}

Copy the SnapshotId to register the image.

Create a custom RHCOS AMI from the RHCOS snapshot:

$ aws ec2 register-image \
   --region ${AWS_DEFAULT_REGION} \
   --architecture x86_64 \ 1
   --description "rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64" \ 2
   --ena-support \
   --name "rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64" \ 3
   --virtualization-type hvm \
   --root-device-name '/dev/xvda' \
   --block-device-mappings 'DeviceName=/dev/xvda,Ebs={DeleteOnTermination=true,SnapshotId=<snapshot_ID>}' 4

1: The RHCOS VMDK architecture type, like x86_64, aarch64, s390x, or ppc64le.
2: The Description from the imported snapshot.
3: The name of the RHCOS AMI.
4: The SnapshotID from the imported snapshot.

To learn more about these APIs, see the AWS documentation for importing snapshots and creating EBS-backed AMIs.

3.9.7. Manually creating the installation configuration file

Installing the cluster requires that you manually create the installation configuration file.

Prerequisites

You have uploaded a custom RHCOS AMI.
You have an SSH public key on your local machine to provide to the installation program. The key will be used for SSH authentication onto your cluster nodes for debugging and disaster recovery.
You have obtained the OpenShift Container Platform installation program and the pull secret for your cluster.

Procedure

Create an installation directory to store your required installation assets in:
```
$ mkdir <installation_directory>
```
Important
You must create a directory. Some installation assets, like bootstrap X.509 certificates have short expiration intervals, so you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
Customize the sample install-config.yaml file template that is provided and save it in the <installation_directory>.
Note
You must name this configuration file install-config.yaml.
Back up the install-config.yaml file so that you can use it to install multiple clusters.
Important
The install-config.yaml file is consumed during the next step of the installation process. You must back it up now.

Additional resources

Installation configuration parameters for AWS

3.9.7.1. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.24. Machine types based on 64-bit x86 architecture for secret regions

c4.*
c5.*
i3.*
m4.*
m5.*
r4.*
r5.*
t3.*

3.9.7.2. Sample customized install-config.yaml file for AWS

You can customize the installation configuration file (install-config.yaml) to specify more details about your OpenShift Container Platform cluster’s platform or modify the values of the required parameters.

Important

This sample YAML file is provided for reference only. Use it as a resource to enter parameter values into the installation configuration file that you created manually.

apiVersion: v1
baseDomain: example.com 1
credentialsMode: Mint 2
controlPlane: 3 4
  hyperthreading: Enabled 5
  name: master
  platform:
    aws:
      zones:
      - us-iso-east-1a
      - us-iso-east-1b
      rootVolume:
        iops: 4000
        size: 500
        type: io1 6
      metadataService:
        authentication: Optional 7
      type: m6i.xlarge
  replicas: 3
compute: 8
- hyperthreading: Enabled 9
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1 10
      metadataService:
        authentication: Optional 11
      type: c5.4xlarge
      zones:
      - us-iso-east-1a
      - us-iso-east-1b
  replicas: 3
metadata:
  name: test-cluster 12
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 13
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: us-iso-east-1 14
    propagateUserTags: true 15
    userTags:
      adminContact: jdoe
      costCenter: 7536
    subnets: 16
    - subnet-1
    - subnet-2
    - subnet-3
    amiID: ami-96c6f8f7 17 18
    serviceEndpoints: 19
      - name: ec2
        url: https://vpce-id.ec2.us-west-2.vpce.amazonaws.com
    hostedZone: Z3URY6TWQ91KVV 20
fips: false 21
sshKey: ssh-ed25519 AAAA... 22
publish: Internal 23
pullSecret: '{"auths": ...}' 24
additionalTrustBundle: | 25
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----

1 12 14 17 24: Required.
2: Optional: Add this parameter to force the Cloud Credential Operator (CCO) to use the specified mode. By default, the CCO uses the root credentials in the kube-system namespace to dynamically try to determine the capabilities of the credentials. For details about CCO modes, see the "About the Cloud Credential Operator" section in the Authentication and authorization guide.
3 8 15: If you do not provide these parameters and values, the installation program provides the default value.
4: The controlPlane section is a single mapping, but the compute section is a sequence of mappings. To meet the requirements of the different data structures, the first line of the compute section must begin with a hyphen, -, and the first line of the controlPlane section must not. Only one control plane pool is used.
5 9: Whether to enable or disable simultaneous multithreading, or hyperthreading. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to Disabled. If you disable simultaneous multithreading in some cluster machines, you must disable it in all cluster machines.
Important
If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance. Use larger instance types, such as m4.2xlarge or m5.2xlarge, for your machines if you disable simultaneous multithreading.
6 10: To configure faster storage for etcd, especially for larger clusters, set the storage type as io1 and set iops to 2000.
7 11: Whether to require the Amazon EC2 Instance Metadata Service v2 (IMDSv2). To require IMDSv2, set the parameter value to Required. To allow the use of both IMDSv1 and IMDSv2, set the parameter value to Optional. If no value is specified, both IMDSv1 and IMDSv2 are allowed.
Note
The IMDS configuration for control plane machines that is set during cluster installation can only be changed by using the AWS CLI. The IMDS configuration for compute machines can be changed by using compute machine sets.
13: The cluster network plugin to install. The default value OVNKubernetes is the only supported value.
16: If you provide your own VPC, specify subnets for each availability zone that your cluster uses.
18: The ID of the AMI used to boot machines for the cluster. If set, the AMI must belong to the same region as the cluster.
19: The AWS service endpoints. Custom endpoints are required when installing to an unknown AWS region. The endpoint URL must use the https protocol and the host must trust the certificate.
20: The ID of your existing Route 53 private hosted zone. Providing an existing hosted zone requires that you supply your own VPC and the hosted zone is already associated with the VPC prior to installing your cluster. If undefined, the installation program creates a new hosted zone.
21: Whether to enable or disable FIPS mode. By default, FIPS mode is not enabled. If FIPS mode is enabled, the Red Hat Enterprise Linux CoreOS (RHCOS) machines that OpenShift Container Platform runs on bypass the default Kubernetes cryptography suite and use the cryptography modules that are provided with RHCOS instead.
Important
To enable FIPS mode for your cluster, you must run the installation program from a Red Hat Enterprise Linux (RHEL) computer configured to operate in FIPS mode. For more information about configuring FIPS mode on RHEL, see Switching RHEL to FIPS mode.
When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.
22: You can optionally provide the sshKey value that you use to access the machines in your cluster.
Note
For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
23: How to publish the user-facing endpoints of your cluster. Set publish to Internal to deploy a private cluster, which cannot be accessed from the internet. The default value is External.
25: The custom CA certificate. This is required when deploying to the SC2S or C2S Regions because the AWS API requires a custom CA trust bundle.

3.9.7.3. Configuring the cluster-wide proxy during installation

Production environments can deny direct access to the internet and instead have an HTTP or HTTPS proxy available. You can configure a new OpenShift Container Platform cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

You have an existing install-config.yaml file.
You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.
Note
The Proxy object status.noProxy field is populated with the values of the networking.machineNetwork[].cidr, networking.clusterNetwork[].cidr, and networking.serviceNetwork[] fields from your installation configuration.
For installations on Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, and Red Hat OpenStack Platform (RHOSP), the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

Edit your install-config.yaml file and add the proxy settings. For example:
```
apiVersion: v1
baseDomain: my.domain.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port> 1
  httpsProxy: https://<username>:<pswd>@<ip>:<port> 2
  noProxy: ec2.<aws_region>.amazonaws.com,elasticloadbalancing.<aws_region>.amazonaws.com,s3.<aws_region>.amazonaws.com 3
additionalTrustBundle: | 4
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> 5
```
1
A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
2
A proxy URL to use for creating HTTPS connections outside the cluster.
3
A comma-separated list of destination domain names, IP addresses, or other network CIDRs to exclude from proxying. Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass the proxy for all destinations. If you have added the Amazon EC2,Elastic Load Balancing, and S3 VPC endpoints to your VPC, you must add these endpoints to the noProxy field.
4
If provided, the installation program generates a config map that is named user-ca-bundle in the openshift-config namespace that contains one or more additional CA certificates that are required for proxying HTTPS connections. The Cluster Network Operator then creates a trusted-ca-bundle config map that merges these contents with the Red Hat Enterprise Linux CoreOS (RHCOS) trust bundle, and this config map is referenced in the trustedCA field of the Proxy object. The additionalTrustBundle field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.
5
Optional: The policy to determine the configuration of the Proxy object to reference the user-ca-bundle config map in the trustedCA field. The allowed values are Proxyonly and Always. Use Proxyonly to reference the user-ca-bundle config map only when http/https proxy is configured. Use Always to always reference the user-ca-bundle config map. The default value is Proxyonly.
Note
The installation program does not support the proxy readinessEndpoints field.
Note
If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:
```
$ ./openshift-install wait-for install-complete --log-level debug
```
Save the file and reference it when installing OpenShift Container Platform.

The installation program creates a cluster-wide proxy that is named cluster that uses the proxy settings in the provided install-config.yaml file. If no proxy settings are provided, a cluster Proxy object is still created, but it will have a nil spec.

Note

Only the Proxy object named cluster is supported, and no additional proxies can be created.

3.9.7.4. Applying existing AWS security groups to the cluster

Applying existing AWS security groups to your control plane and compute machines can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

Prerequisites

You have created the security groups in AWS. For more information, see the AWS documentation about working with security groups.
The security groups must be associated with the existing VPC that you are deploying the cluster to. The security groups cannot be associated with another VPC.
You have an existing install-config.yaml file.

Procedure

In the install-config.yaml file, edit the compute.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your compute machines.
Edit the controlPlane.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your control plane machines.
Save the file and reference it when deploying the cluster.

Sample install-config.yaml file that specifies custom security groups

# ...
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-1 1
        - sg-2
  replicas: 3
controlPlane:
  hyperthreading: Enabled
  name: master
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-3
        - sg-4
  replicas: 3
platform:
  aws:
    region: us-east-1
    subnets: 2
      - subnet-1
      - subnet-2
      - subnet-3

1: Specify the name of the security group as it appears in the Amazon EC2 console, including the sg prefix.
2: Specify subnets for each availability zone that your cluster uses.

3.9.8. Alternatives to storing administrator-level secrets in the kube-system project

By default, administrator secrets are stored in the kube-system project. If you configured the credentialsMode parameter in the install-config.yaml file to Manual, you must use one of the following alternatives:

To manage long-term cloud credentials manually, follow the procedure in Manually creating long-term credentials.
To implement short-term credentials that are managed outside the cluster for individual components, follow the procedures in Configuring an AWS cluster to use short-term credentials.

3.9.8.1. Manually creating long-term credentials

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```

Extract the list of CredentialsRequest custom resources (CRs) from the OpenShift Container Platform release image by running the following command:

$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3

1: The --included parameter includes only the manifests that your specific cluster configuration requires.
2: Specify the location of the install-config.yaml file.
3: Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

This command creates a YAML file for each CredentialsRequest object.

Sample CredentialsRequest object

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - iam:GetUser
      - iam:GetUserPolicy
      - iam:ListAccessKeys
      resource: "*"
  ...

Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object.

Sample CredentialsRequest object with secrets

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - s3:CreateBucket
      - s3:DeleteBucket
      resource: "*"
      ...
  secretRef:
    name: <component_secret>
    namespace: <component_namespace>
  ...

Sample Secret object

apiVersion: v1
kind: Secret
metadata:
  name: <component_secret>
  namespace: <component_namespace>
data:
  aws_access_key_id: <base64_encoded_aws_access_key_id>
  aws_secret_access_key: <base64_encoded_aws_secret_access_key>

Important

Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

3.9.8.2. Configuring an AWS cluster to use short-term credentials

To install a cluster that is configured to use the AWS Security Token Service (STS), you must configure the CCO utility and create the required AWS resources for your cluster.

3.9.8.2.1. Configuring the Cloud Credential Operator utility

To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.

Note

The ccoctl utility is a Linux binary that must run in a Linux environment.

Prerequisites

You have access to an OpenShift Container Platform account with cluster administrator access.
You have installed the OpenShift CLI (oc).

You have created an AWS account for the ccoctl utility to use with the following permissions:
Example 3.25. Required AWS permissions
Required iam permissions
- iam:CreateOpenIDConnectProvider
- iam:CreateRole
- iam:DeleteOpenIDConnectProvider
- iam:DeleteRole
- iam:DeleteRolePolicy
- iam:GetOpenIDConnectProvider
- iam:GetRole
- iam:GetUser
- iam:ListOpenIDConnectProviders
- iam:ListRolePolicies
- iam:ListRoles
- iam:PutRolePolicy
- iam:TagOpenIDConnectProvider
- iam:TagRole
Required s3 permissions
- s3:CreateBucket
- s3:DeleteBucket
- s3:DeleteObject
- s3:GetBucketAcl
- s3:GetBucketTagging
- s3:GetObject
- s3:GetObjectAcl
- s3:GetObjectTagging
- s3:ListBucket
- s3:PutBucketAcl
- s3:PutBucketPolicy
- s3:PutBucketPublicAccessBlock
- s3:PutBucketTagging
- s3:PutObject
- s3:PutObjectAcl
- s3:PutObjectTagging
Required cloudfront permissions
- cloudfront:ListCloudFrontOriginAccessIdentities
- cloudfront:ListDistributions
- cloudfront:ListTagsForResource
If you plan to store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL, the AWS account that runs the ccoctl utility requires the following additional permissions:
Example 3.26. Additional permissions for a private S3 bucket with CloudFront
- cloudfront:CreateCloudFrontOriginAccessIdentity
- cloudfront:CreateDistribution
- cloudfront:DeleteCloudFrontOriginAccessIdentity
- cloudfront:DeleteDistribution
- cloudfront:GetCloudFrontOriginAccessIdentity
- cloudfront:GetCloudFrontOriginAccessIdentityConfig
- cloudfront:GetDistribution
- cloudfront:TagResource
- cloudfront:UpdateDistribution
Note
These additional permissions support the use of the --create-private-s3-bucket option when processing credentials requests with the ccoctl aws create-all command.

Procedure

Set a variable for the OpenShift Container Platform release image by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
```
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
```
Note
Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.
Extract the ccoctl binary from the CCO container image within the OpenShift Container Platform release image by running the following command:
```
$ oc image extract $CCO_IMAGE \
  --file="/usr/bin/ccoctl.<rhel_version>" \1
  -a ~/.pull-secret
```
1
For <rhel_version>, specify the value that corresponds to the version of Red Hat Enterprise Linux (RHEL) that the host uses. If no value is specified, ccoctl.rhel8 is used by default. The following values are valid:
rhel8: Specify this value for hosts that use RHEL 8.
rhel9: Specify this value for hosts that use RHEL 9.
Change the permissions to make ccoctl executable by running the following command:
```
$ chmod 775 ccoctl.<rhel_version>
```

Verification

To verify that ccoctl is ready to use, display the help file. Use a relative file name when you run the command, for example:

$ ./ccoctl.rhel9

Example output

OpenShift credentials provisioning tool

Usage:
  ccoctl [command]

Available Commands:
  aws          Manage credentials objects for AWS cloud
  azure        Manage credentials objects for Azure
  gcp          Manage credentials objects for Google cloud
  help         Help about any command
  ibmcloud     Manage credentials objects for {ibm-cloud-title}
  nutanix      Manage credentials objects for Nutanix

Flags:
  -h, --help   help for ccoctl

Use "ccoctl [command] --help" for more information about a command.

3.9.8.2.2. Creating AWS resources with the Cloud Credential Operator utility

You have the following options when creating AWS resources:

You can use the ccoctl aws create-all command to create the AWS resources automatically. This is the quickest way to create the resources. See Creating AWS resources with a single command.
If you need to review the JSON files that the ccoctl tool creates before modifying AWS resources, or if the process the ccoctl tool uses to create AWS resources automatically does not meet the requirements of your organization, you can create the AWS resources individually. See Creating AWS resources individually.

3.9.8.2.2.1. Creating AWS resources with a single command

If the process the ccoctl tool uses to create AWS resources automatically meets the requirements of your organization, you can use the ccoctl aws create-all command to automate the creation of AWS resources.

Otherwise, you can create the AWS resources individually. For more information, see "Creating AWS resources individually".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Prerequisites

You must have:

Extracted and prepared the ccoctl binary.

Procedure

Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image by running the following command:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
1
The --included parameter includes only the manifests that your specific cluster configuration requires.
2
Specify the location of the install-config.yaml file.
3
Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
Note
This command might take a few moments to run.
Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-all \
  --name=<name> \1
  --region=<aws_region> \2
  --credentials-requests-dir=<path_to_credentials_requests_directory> \3
  --output-dir=<path_to_ccoctl_output_dir> \4
  --create-private-s3-bucket 5
```
1
Specify the name used to tag any cloud resources that are created for tracking.
2
Specify the AWS region in which cloud resources will be created.
3
Specify the directory containing the files for the component CredentialsRequest objects.
4
Optional: Specify the directory in which you want the ccoctl utility to create objects. By default, the utility creates objects in the directory in which the commands are run.
5
Optional: By default, the ccoctl utility stores the OpenID Connect (OIDC) configuration files in a public S3 bucket and uses the S3 URL as the public OIDC endpoint. To store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL instead, use the --create-private-s3-bucket parameter.
Note
If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.9.8.2.2.2. Creating AWS resources individually

You can use the ccoctl tool to create AWS resources individually. This option might be useful for an organization that shares the responsibility for creating these resources among different users or departments.

Otherwise, you can use the ccoctl aws create-all command to create the AWS resources automatically. For more information, see "Creating AWS resources with a single command".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Some ccoctl commands make AWS API calls to create or modify AWS resources. You can use the --dry-run flag to avoid making API calls. Using this flag creates JSON files on the local file system instead. You can review and modify the JSON files and then apply them with the AWS CLI tool using the --cli-input-json parameters.

Prerequisites

Extract and prepare the ccoctl binary.

Procedure

Generate the public and private RSA key files that are used to set up the OpenID Connect provider for the cluster by running the following command:
```
$ ccoctl aws create-key-pair
```
Example output
```
2021/04/13 11:01:02 Generating RSA keypair
2021/04/13 11:01:03 Writing private key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.private
2021/04/13 11:01:03 Writing public key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.public
2021/04/13 11:01:03 Copying signing key for use by installer
```
where serviceaccount-signer.private and serviceaccount-signer.public are the generated key files.
This command also creates a private key that the cluster requires during installation in /<path_to_ccoctl_output_dir>/tls/bound-service-account-signing-key.key.
Create an OpenID Connect identity provider and S3 bucket on AWS by running the following command:
```
$ ccoctl aws create-identity-provider \
  --name=<name> \1
  --region=<aws_region> \2
  --public-key-file=<path_to_ccoctl_output_dir>/serviceaccount-signer.public 3
```
1
<name> is the name used to tag any cloud resources that are created for tracking.
2
<aws-region> is the AWS region in which cloud resources will be created.
3
<path_to_ccoctl_output_dir> is the path to the public key file that the ccoctl aws create-key-pair command generated.
Example output
```
2021/04/13 11:16:09 Bucket <name>-oidc created
2021/04/13 11:16:10 OpenID Connect discovery document in the S3 bucket <name>-oidc at .well-known/openid-configuration updated
2021/04/13 11:16:10 Reading public key
2021/04/13 11:16:10 JSON web key set (JWKS) in the S3 bucket <name>-oidc at keys.json updated
2021/04/13 11:16:18 Identity Provider created with ARN: arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
where openid-configuration is a discovery document and keys.json is a JSON web key set file.
This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/cluster-authentication-02-config.yaml. This file sets the issuer URL field for the service account tokens that the cluster generates, so that the AWS IAM identity provider trusts the tokens.
Create IAM roles for each component in the cluster:
1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
2. Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
  1
  The --included parameter includes only the manifests that your specific cluster configuration requires.
  2
  Specify the location of the install-config.yaml file.
  3
  Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-iam-roles \
  --name=<name> \
  --region=<aws_region> \
  --credentials-requests-dir=<path_to_credentials_requests_directory> \
  --identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
  Note
  For AWS environments that use alternative IAM API endpoints, such as GovCloud, you must also specify your region with the --region parameter.
  If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.
  For each CredentialsRequest object, ccoctl creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy as defined in each CredentialsRequest object from the OpenShift Container Platform release image.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.9.8.2.3. Incorporating the Cloud Credential Operator utility manifests

To implement short-term security credentials managed outside the cluster for individual components, you must move the manifest files that the Cloud Credential Operator utility (ccoctl) created to the correct directories for the installation program.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have configured the Cloud Credential Operator utility (ccoctl).
You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:
```
$ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/
```
Copy the tls directory that contains the private key to the installation directory:
```
$ cp -a /<path_to_ccoctl_output_dir>/tls .
```

3.9.9. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.9.10. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.9.11. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

Accessing the web console

3.9.12. Next steps

Validating an installation.
Customize your cluster.
If necessary, you can opt out of remote health reporting.
If necessary, you can remove cloud provider credentials.

3.10. Installing a cluster on AWS China

In OpenShift Container Platform version 4.17, you can install a cluster to the following Amazon Web Services (AWS) China regions:

cn-north-1 (Beijing)
cn-northwest-1 (Ningxia)

3.10.1. Prerequisites

You have an Internet Content Provider (ICP) license.
You reviewed details about the OpenShift Container Platform installation and update processes.
You read the documentation on selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.

Important

If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.

3.10.2. Installation requirements

Red Hat does not publish a Red Hat Enterprise Linux CoreOS (RHCOS) Amazon Machine Image (AMI) for the AWS China regions.

Before you can install the cluster, you must:

Upload a custom RHCOS AMI.
Manually create the installation configuration file (install-config.yaml).
Specify the AWS region, and the accompanying custom AMI, in the installation configuration file.

You cannot use the OpenShift Container Platform installation program to create the installation configuration file. The installer does not list an AWS region without native support for an RHCOS AMI.

3.10.3. Private clusters

You can deploy a private OpenShift Container Platform cluster that does not expose external endpoints. Private clusters are accessible from only an internal network and are not visible to the internet.

By default, OpenShift Container Platform is provisioned to use publicly-accessible DNS and endpoints. A private cluster sets the DNS, Ingress Controller, and API server to private when you deploy your cluster. This means that the cluster resources are only accessible from your internal network and are not visible to the internet.

Important

If the cluster has any public subnets, load balancer services created by administrators might be publicly accessible. To ensure cluster security, verify that these services are explicitly annotated as private.

To deploy a private cluster, you must:

Use existing networking that meets your requirements. Your cluster resources might be shared between other clusters on the network.
Deploy from a machine that has access to:
- The API services for the cloud to which you provision.
- The hosts on the network that you provision.
- The internet to obtain installation media.

You can use any machine that meets these access requirements and follows your company’s guidelines. For example, this machine can be a bastion host on your cloud network.

Note

AWS China does not support a VPN connection between the VPC and your network. For more information about the Amazon VPC service in the Beijing and Ningxia regions, see Amazon Virtual Private Cloud in the AWS China documentation.

3.10.3.1. Private clusters in AWS

To create a private cluster on Amazon Web Services (AWS), you must provide an existing private VPC and subnets to host the cluster. The installation program must also be able to resolve the DNS records that the cluster requires. The installation program configures the Ingress Operator and API server for access from only the private network.

The cluster still requires access to internet to access the AWS APIs.

The following items are not required or created when you install a private cluster:

Public subnets
Public load balancers, which support public ingress
A public Route 53 zone that matches the baseDomain for the cluster

The installation program does use the baseDomain that you specify to create a private Route 53 zone and the required records for the cluster. The cluster is configured so that the Operators do not create public records for the cluster and all cluster machines are placed in the private subnets that you specify.

3.10.3.1.1. Limitations

The ability to add public functionality to a private cluster is limited.

You cannot make the Kubernetes API endpoints public after installation without taking additional actions, including creating public subnets in the VPC for each availability zone in use, creating a public load balancer, and configuring the control plane security groups to allow traffic from the internet on 6443 (Kubernetes API port).
If you use a public Service type load balancer, you must tag a public subnet in each availability zone with kubernetes.io/cluster/<cluster-infra-id>: shared so that AWS can use them to create public load balancers.

3.10.4. About using a custom VPC

In OpenShift Container Platform 4.17, you can deploy a cluster into existing subnets in an existing Amazon Virtual Private Cloud (VPC) in Amazon Web Services (AWS). By deploying OpenShift Container Platform into an existing AWS VPC, you might be able to avoid limit constraints in new accounts or more easily abide by the operational constraints that your company’s guidelines set. If you cannot obtain the infrastructure creation permissions that are required to create the VPC yourself, use this installation option.

Because the installation program cannot know what other components are also in your existing subnets, it cannot choose subnet CIDRs and so forth on your behalf. You must configure networking for the subnets that you install your cluster to yourself.

3.10.4.1. Requirements for using your VPC

The installation program no longer creates the following components:

Internet gateways
NAT gateways
Subnets
Route tables
VPCs
VPC DHCP options
VPC endpoints

Note

The installation program requires that you use the cloud-provided DNS server. Using a custom DNS server is not supported and causes the installation to fail.

If you use a custom VPC, you must correctly configure it and its subnets for the installation program and the cluster to use. See Create a VPC in the Amazon Web Services documentation for more information about AWS VPC console wizard configurations and creating and managing an AWS VPC.

The installation program cannot:

Subdivide network ranges for the cluster to use.
Set route tables for the subnets.
Set VPC options like DHCP.

You must complete these tasks before you install the cluster. See VPC networking components and Route tables for your VPC for more information on configuring networking in an AWS VPC.

Your VPC must meet the following characteristics:

The VPC must not use the kubernetes.io/cluster/.*: owned, Name, and openshift.io/cluster tags.
The installation program modifies your subnets to add the kubernetes.io/cluster/.*: shared tag, so your subnets must have at least one free tag slot available for it. See Tag Restrictions in the AWS documentation to confirm that the installation program can add a tag to each subnet that you specify. You cannot use a Name tag, because it overlaps with the EC2 Name field and the installation fails.
If you want to extend your OpenShift Container Platform cluster into an AWS Outpost and have an existing Outpost subnet, the existing subnet must use the kubernetes.io/cluster/unmanaged: true tag. If you do not apply this tag, the installation might fail due to the Cloud Controller Manager creating a service load balancer in the Outpost subnet, which is an unsupported configuration.
You must enable the enableDnsSupport and enableDnsHostnames attributes in your VPC, so that the cluster can use the Route 53 zones that are attached to the VPC to resolve cluster’s internal DNS records. See DNS Support in Your VPC in the AWS documentation.
If you prefer to use your own Route 53 hosted private zone, you must associate the existing hosted zone with your VPC prior to installing a cluster. You can define your hosted zone using the platform.aws.hostedZone and platform.aws.hostedZoneRole fields in the install-config.yaml file. You can use a private hosted zone from another account by sharing it with the account where you install the cluster. If you use a private hosted zone from another account, you must use the Passthrough or Manual credentials mode.

If you are working in a disconnected environment, you are unable to reach the public IP addresses for EC2, ELB, and S3 endpoints. Depending on the level to which you want to restrict internet traffic during the installation, the following configuration options are available:

Option 1: Create VPC endpoints

Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com.cn
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

With this option, network traffic remains private between your VPC and the required AWS services.

Option 2: Create a proxy without VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy. With this option, internet traffic goes through the proxy to reach the required AWS services.

Option 3: Create a proxy with VPC endpoints

As part of the installation process, you can configure an HTTP or HTTPS proxy with VPC endpoints. Create a VPC endpoint and attach it to the subnets that the clusters are using. Name the endpoints as follows:

ec2.<aws_region>.amazonaws.com.cn
elasticloadbalancing.<aws_region>.amazonaws.com
s3.<aws_region>.amazonaws.com

When configuring the proxy in the install-config.yaml file, add these endpoints to the noProxy field. With this option, the proxy prevents the cluster from accessing the internet directly. However, network traffic remains private between your VPC and the required AWS services.

Required VPC components

You must provide a suitable VPC and subnets that allow communication to your machines.

Component	AWS type	Description
VPC	`AWS::EC2::VPC` `AWS::EC2::VPCEndpoint`	You must provide a public VPC for the cluster to use. The VPC uses an endpoint that references the route tables for each subnet to improve communication with the registry that is hosted in S3.
Public subnets	`AWS::EC2::Subnet` `AWS::EC2::SubnetNetworkAclAssociation`	Your VPC must have public subnets for between 1 and 3 availability zones and associate them with appropriate Ingress rules.
Internet gateway	`AWS::EC2::InternetGateway` `AWS::EC2::VPCGatewayAttachment` `AWS::EC2::RouteTable` `AWS::EC2::Route` `AWS::EC2::SubnetRouteTableAssociation` `AWS::EC2::NatGateway` `AWS::EC2::EIP`	You must have a public internet gateway, with public routes, attached to the VPC. In the provided templates, each public subnet has a NAT gateway with an EIP address. These NAT gateways allow cluster resources, like private subnet instances, to reach the internet and are not required for some restricted network or proxy scenarios.
Network access control	`AWS::EC2::NetworkAcl` `AWS::EC2::NetworkAclEntry`	You must allow the VPC to access the following ports:
		Port	Reason
		`80`	Inbound HTTP traffic
		`443`	Inbound HTTPS traffic
		`22`	Inbound SSH traffic
		`1024` - `65535`	Inbound ephemeral traffic
		`0` - `65535`	Outbound ephemeral traffic
Private subnets	`AWS::EC2::Subnet` `AWS::EC2::RouteTable` `AWS::EC2::SubnetRouteTableAssociation`	Your VPC can have private subnets. The provided CloudFormation templates can create private subnets for between 1 and 3 availability zones. If you use private subnets, you must provide appropriate routes and tables for them.

3.10.4.2. VPC validation

To ensure that the subnets that you provide are suitable, the installation program confirms the following data:

All the subnets that you specify exist.
You provide private subnets.
The subnet CIDRs belong to the machine CIDR that you specified.
You provide subnets for each availability zone. Each availability zone contains no more than one public and one private subnet. If you use a private cluster, provide only a private subnet for each availability zone. Otherwise, provide exactly one public and private subnet for each availability zone.
You provide a public subnet for each private subnet availability zone. Machines are not provisioned in availability zones that you do not provide private subnets for.

If you destroy a cluster that uses an existing VPC, the VPC is not deleted. When you remove the OpenShift Container Platform cluster from a VPC, the kubernetes.io/cluster/.*: shared tag is removed from the subnets that it used.

3.10.4.3. Division of permissions

Starting with OpenShift Container Platform 4.3, you do not need all of the permissions that are required for an installation program-provisioned infrastructure cluster to deploy a cluster. This change mimics the division of permissions that you might have at your company: some individuals can create different resource in your clouds than others. For example, you might be able to create application-specific items, like instances, buckets, and load balancers, but not networking-related components such as VPCs, subnets, or ingress rules.

The AWS credentials that you use when you create your cluster do not need the networking permissions that are required to make VPCs and core networking components within the VPC, such as subnets, routing tables, internet gateways, NAT, and VPN. You still need permission to make the application resources that the machines within the cluster require, such as ELBs, security groups, S3 buckets, and nodes.

3.10.4.4. Isolation between clusters

If you deploy OpenShift Container Platform to an existing network, the isolation of cluster services is reduced in the following ways:

You can install multiple OpenShift Container Platform clusters in the same VPC.
ICMP ingress is allowed from the entire network.
TCP 22 ingress (SSH) is allowed to the entire network.
Control plane TCP 6443 ingress (Kubernetes API) is allowed to the entire network.
Control plane TCP 22623 ingress (MCS) is allowed to the entire network.

3.10.4.5. Optional: AWS security groups

By default, the installation program creates and attaches security groups to control plane and compute machines. The rules associated with the default security groups cannot be modified.

However, you can apply additional existing AWS security groups, which are associated with your existing VPC, to control plane and compute machines. Applying custom security groups can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

As part of the installation process, you apply custom security groups by modifying the install-config.yaml file before deploying the cluster.

For more information, see "Applying existing AWS security groups to the cluster".

3.10.5. Uploading a custom RHCOS AMI in AWS

If you are deploying to a custom Amazon Web Services (AWS) region, you must upload a custom Red Hat Enterprise Linux CoreOS (RHCOS) Amazon Machine Image (AMI) that belongs to that region.

Prerequisites

You configured an AWS account.
You created an Amazon S3 bucket with the required IAM service role.
You uploaded your RHCOS VMDK file to Amazon S3. The RHCOS VMDK file must be the highest version that is less than or equal to the OpenShift Container Platform version you are installing.
You downloaded the AWS CLI and installed it on your computer. See Install the AWS CLI Using the Bundled Installer.

Procedure

Export your AWS profile as an environment variable:
```
$ export AWS_PROFILE=<aws_profile> 1
```
1
The AWS profile name that holds your AWS credentials, like beijingadmin.
Export the region to associate with your custom AMI as an environment variable:
```
$ export AWS_DEFAULT_REGION=<aws_region> 1
```
1
The AWS region, like cn-north-1.
Export the version of RHCOS you uploaded to Amazon S3 as an environment variable:
```
$ export RHCOS_VERSION=<version> 1
```
1
The RHCOS VMDK version, like 4.17.0.
Export the Amazon S3 bucket name as an environment variable:
```
$ export VMIMPORT_BUCKET_NAME=<s3_bucket_name>
```

Create the containers.json file and define your RHCOS VMDK file:

$ cat <<EOF > containers.json
{
   "Description": "rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64",
   "Format": "vmdk",
   "UserBucket": {
      "S3Bucket": "${VMIMPORT_BUCKET_NAME}",
      "S3Key": "rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64.vmdk"
   }
}
EOF

Import the RHCOS disk as an Amazon EBS snapshot:
```
$ aws ec2 import-snapshot --region ${AWS_DEFAULT_REGION} \
     --description "<description>" \ 1
     --disk-container "file://<file_path>/containers.json" 2
```
1
The description of your RHCOS disk being imported, like rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64.
2
The file path to the JSON file describing your RHCOS disk. The JSON file should contain your Amazon S3 bucket name and key.

Check the status of the image import:

$ watch -n 5 aws ec2 describe-import-snapshot-tasks --region ${AWS_DEFAULT_REGION}

Example output

{
    "ImportSnapshotTasks": [
        {
            "Description": "rhcos-4.7.0-x86_64-aws.x86_64",
            "ImportTaskId": "import-snap-fh6i8uil",
            "SnapshotTaskDetail": {
                "Description": "rhcos-4.7.0-x86_64-aws.x86_64",
                "DiskImageSize": 819056640.0,
                "Format": "VMDK",
                "SnapshotId": "snap-06331325870076318",
                "Status": "completed",
                "UserBucket": {
                    "S3Bucket": "external-images",
                    "S3Key": "rhcos-4.7.0-x86_64-aws.x86_64.vmdk"
                }
            }
        }
    ]
}

Copy the SnapshotId to register the image.

Create a custom RHCOS AMI from the RHCOS snapshot:

$ aws ec2 register-image \
   --region ${AWS_DEFAULT_REGION} \
   --architecture x86_64 \ 1
   --description "rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64" \ 2
   --ena-support \
   --name "rhcos-${RHCOS_VERSION}-x86_64-aws.x86_64" \ 3
   --virtualization-type hvm \
   --root-device-name '/dev/xvda' \
   --block-device-mappings 'DeviceName=/dev/xvda,Ebs={DeleteOnTermination=true,SnapshotId=<snapshot_ID>}' 4

1: The RHCOS VMDK architecture type, like x86_64, aarch64, s390x, or ppc64le.
2: The Description from the imported snapshot.
3: The name of the RHCOS AMI.
4: The SnapshotID from the imported snapshot.

To learn more about these APIs, see the AWS documentation for importing snapshots and creating EBS-backed AMIs.

3.10.6. Manually creating the installation configuration file

Installing the cluster requires that you manually create the installation configuration file.

Prerequisites

You have uploaded a custom RHCOS AMI.
You have an SSH public key on your local machine to provide to the installation program. The key will be used for SSH authentication onto your cluster nodes for debugging and disaster recovery.
You have obtained the OpenShift Container Platform installation program and the pull secret for your cluster.

Procedure

Create an installation directory to store your required installation assets in:
```
$ mkdir <installation_directory>
```
Important
You must create a directory. Some installation assets, like bootstrap X.509 certificates have short expiration intervals, so you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
Customize the sample install-config.yaml file template that is provided and save it in the <installation_directory>.
Note
You must name this configuration file install-config.yaml.
Back up the install-config.yaml file so that you can use it to install multiple clusters.
Important
The install-config.yaml file is consumed during the next step of the installation process. You must back it up now.

Additional resources

Installation configuration parameters for AWS

3.10.6.1. Sample customized install-config.yaml file for AWS

You can customize the installation configuration file (install-config.yaml) to specify more details about your OpenShift Container Platform cluster’s platform or modify the values of the required parameters.

Important

This sample YAML file is provided for reference only. Use it as a resource to enter parameter values into the installation configuration file that you created manually.

apiVersion: v1
baseDomain: example.com 1
credentialsMode: Mint 2
controlPlane: 3 4
  hyperthreading: Enabled 5
  name: master
  platform:
    aws:
      zones:
      - cn-north-1a
      - cn-north-1b
      rootVolume:
        iops: 4000
        size: 500
        type: io1 6
      metadataService:
        authentication: Optional 7
      type: m6i.xlarge
  replicas: 3
compute: 8
- hyperthreading: Enabled 9
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1 10
      metadataService:
        authentication: Optional 11
      type: c5.4xlarge
      zones:
      - cn-north-1a
  replicas: 3
metadata:
  name: test-cluster 12
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 13
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: cn-north-1 14
    propagateUserTags: true 15
    userTags:
      adminContact: jdoe
      costCenter: 7536
    subnets: 16
    - subnet-1
    - subnet-2
    - subnet-3
    amiID: ami-96c6f8f7 17 18
    serviceEndpoints: 19
      - name: ec2
        url: https://vpce-id.ec2.cn-north-1.vpce.amazonaws.com.cn
    hostedZone: Z3URY6TWQ91KVV 20
fips: false 21
sshKey: ssh-ed25519 AAAA... 22
publish: Internal 23
pullSecret: '{"auths": ...}' 24

1 12 14 17 24: Required.
2: Optional: Add this parameter to force the Cloud Credential Operator (CCO) to use the specified mode. By default, the CCO uses the root credentials in the kube-system namespace to dynamically try to determine the capabilities of the credentials. For details about CCO modes, see the "About the Cloud Credential Operator" section in the Authentication and authorization guide.
3 8 15: If you do not provide these parameters and values, the installation program provides the default value.
4: The controlPlane section is a single mapping, but the compute section is a sequence of mappings. To meet the requirements of the different data structures, the first line of the compute section must begin with a hyphen, -, and the first line of the controlPlane section must not. Only one control plane pool is used.
5 9: Whether to enable or disable simultaneous multithreading, or hyperthreading. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. You can disable it by setting the parameter value to Disabled. If you disable simultaneous multithreading in some cluster machines, you must disable it in all cluster machines.
Important
If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance. Use larger instance types, such as m4.2xlarge or m5.2xlarge, for your machines if you disable simultaneous multithreading.
6 10: To configure faster storage for etcd, especially for larger clusters, set the storage type as io1 and set iops to 2000.
7 11: Whether to require the Amazon EC2 Instance Metadata Service v2 (IMDSv2). To require IMDSv2, set the parameter value to Required. To allow the use of both IMDSv1 and IMDSv2, set the parameter value to Optional. If no value is specified, both IMDSv1 and IMDSv2 are allowed.
Note
The IMDS configuration for control plane machines that is set during cluster installation can only be changed by using the AWS CLI. The IMDS configuration for compute machines can be changed by using compute machine sets.
13: The cluster network plugin to install. The default value OVNKubernetes is the only supported value.
16: If you provide your own VPC, specify subnets for each availability zone that your cluster uses.
18: The ID of the AMI used to boot machines for the cluster. If set, the AMI must belong to the same region as the cluster.
19: The AWS service endpoints. Custom endpoints are required when installing to an unknown AWS region. The endpoint URL must use the https protocol and the host must trust the certificate.
20: The ID of your existing Route 53 private hosted zone. Providing an existing hosted zone requires that you supply your own VPC and the hosted zone is already associated with the VPC prior to installing your cluster. If undefined, the installation program creates a new hosted zone.
21: Whether to enable or disable FIPS mode. By default, FIPS mode is not enabled. If FIPS mode is enabled, the Red Hat Enterprise Linux CoreOS (RHCOS) machines that OpenShift Container Platform runs on bypass the default Kubernetes cryptography suite and use the cryptography modules that are provided with RHCOS instead.
Important
To enable FIPS mode for your cluster, you must run the installation program from a Red Hat Enterprise Linux (RHEL) computer configured to operate in FIPS mode. For more information about configuring FIPS mode on RHEL, see Switching RHEL to FIPS mode.
When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.
22: You can optionally provide the sshKey value that you use to access the machines in your cluster.
Note
For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
23: How to publish the user-facing endpoints of your cluster. Set publish to Internal to deploy a private cluster, which cannot be accessed from the internet. The default value is External.

3.10.6.2. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.17. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

Additional resources

Optimizing storage

3.10.6.3. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.27. Machine types based on 64-bit x86 architecture

c4.*
c5.*
c5a.*
i3.*
m4.*
m5.*
m5a.*
m6a.*
m6i.*
r4.*
r5.*
r5a.*
r6i.*
t3.*
t3a.*

3.10.6.4. Tested instance types for AWS on 64-bit ARM infrastructures

The following Amazon Web Services (AWS) 64-bit ARM instance types have been tested with OpenShift Container Platform.

Note

Use the machine types included in the following charts for your AWS ARM instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in "Minimum resource requirements for cluster installation".

Example 3.28. Machine types based on 64-bit ARM architecture

c6g.*
c7g.*
m6g.*
m7g.*
r8g.*

3.10.6.5. Configuring the cluster-wide proxy during installation

Production environments can deny direct access to the internet and instead have an HTTP or HTTPS proxy available. You can configure a new OpenShift Container Platform cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

You have an existing install-config.yaml file.
You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.
Note
The Proxy object status.noProxy field is populated with the values of the networking.machineNetwork[].cidr, networking.clusterNetwork[].cidr, and networking.serviceNetwork[] fields from your installation configuration.
For installations on Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, and Red Hat OpenStack Platform (RHOSP), the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

Edit your install-config.yaml file and add the proxy settings. For example:
```
apiVersion: v1
baseDomain: my.domain.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port> 1
  httpsProxy: https://<username>:<pswd>@<ip>:<port> 2
  noProxy: ec2.<aws_region>.amazonaws.com,elasticloadbalancing.<aws_region>.amazonaws.com,s3.<aws_region>.amazonaws.com 3
additionalTrustBundle: | 4
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> 5
```
1
A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
2
A proxy URL to use for creating HTTPS connections outside the cluster.
3
A comma-separated list of destination domain names, IP addresses, or other network CIDRs to exclude from proxying. Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass the proxy for all destinations. If you have added the Amazon EC2,Elastic Load Balancing, and S3 VPC endpoints to your VPC, you must add these endpoints to the noProxy field.
4
If provided, the installation program generates a config map that is named user-ca-bundle in the openshift-config namespace that contains one or more additional CA certificates that are required for proxying HTTPS connections. The Cluster Network Operator then creates a trusted-ca-bundle config map that merges these contents with the Red Hat Enterprise Linux CoreOS (RHCOS) trust bundle, and this config map is referenced in the trustedCA field of the Proxy object. The additionalTrustBundle field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.
5
Optional: The policy to determine the configuration of the Proxy object to reference the user-ca-bundle config map in the trustedCA field. The allowed values are Proxyonly and Always. Use Proxyonly to reference the user-ca-bundle config map only when http/https proxy is configured. Use Always to always reference the user-ca-bundle config map. The default value is Proxyonly.
Note
The installation program does not support the proxy readinessEndpoints field.
Note
If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:
```
$ ./openshift-install wait-for install-complete --log-level debug
```
Save the file and reference it when installing OpenShift Container Platform.

The installation program creates a cluster-wide proxy that is named cluster that uses the proxy settings in the provided install-config.yaml file. If no proxy settings are provided, a cluster Proxy object is still created, but it will have a nil spec.

Note

Only the Proxy object named cluster is supported, and no additional proxies can be created.

3.10.6.6. Applying existing AWS security groups to the cluster

Applying existing AWS security groups to your control plane and compute machines can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

Prerequisites

You have created the security groups in AWS. For more information, see the AWS documentation about working with security groups.
The security groups must be associated with the existing VPC that you are deploying the cluster to. The security groups cannot be associated with another VPC.
You have an existing install-config.yaml file.

Procedure

In the install-config.yaml file, edit the compute.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your compute machines.
Edit the controlPlane.platform.aws.additionalSecurityGroupIDs parameter to specify one or more custom security groups for your control plane machines.
Save the file and reference it when deploying the cluster.

Sample install-config.yaml file that specifies custom security groups

# ...
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-1 1
        - sg-2
  replicas: 3
controlPlane:
  hyperthreading: Enabled
  name: master
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-3
        - sg-4
  replicas: 3
platform:
  aws:
    region: us-east-1
    subnets: 2
      - subnet-1
      - subnet-2
      - subnet-3

1: Specify the name of the security group as it appears in the Amazon EC2 console, including the sg prefix.
2: Specify subnets for each availability zone that your cluster uses.

3.10.7. Alternatives to storing administrator-level secrets in the kube-system project

By default, administrator secrets are stored in the kube-system project. If you configured the credentialsMode parameter in the install-config.yaml file to Manual, you must use one of the following alternatives:

To manage long-term cloud credentials manually, follow the procedure in Manually creating long-term credentials.
To implement short-term credentials that are managed outside the cluster for individual components, follow the procedures in Configuring an AWS cluster to use short-term credentials.

3.10.7.1. Manually creating long-term credentials

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```

Extract the list of CredentialsRequest custom resources (CRs) from the OpenShift Container Platform release image by running the following command:

$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3

1: The --included parameter includes only the manifests that your specific cluster configuration requires.
2: Specify the location of the install-config.yaml file.
3: Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

This command creates a YAML file for each CredentialsRequest object.

Sample CredentialsRequest object

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - iam:GetUser
      - iam:GetUserPolicy
      - iam:ListAccessKeys
      resource: "*"
  ...

Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object.

Sample CredentialsRequest object with secrets

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <component_credentials_request>
  namespace: openshift-cloud-credential-operator
  ...
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
    - effect: Allow
      action:
      - s3:CreateBucket
      - s3:DeleteBucket
      resource: "*"
      ...
  secretRef:
    name: <component_secret>
    namespace: <component_namespace>
  ...

Sample Secret object

apiVersion: v1
kind: Secret
metadata:
  name: <component_secret>
  namespace: <component_namespace>
data:
  aws_access_key_id: <base64_encoded_aws_access_key_id>
  aws_secret_access_key: <base64_encoded_aws_secret_access_key>

Important

Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

3.10.7.2. Configuring an AWS cluster to use short-term credentials

To install a cluster that is configured to use the AWS Security Token Service (STS), you must configure the CCO utility and create the required AWS resources for your cluster.

3.10.7.2.1. Configuring the Cloud Credential Operator utility

To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.

Note

The ccoctl utility is a Linux binary that must run in a Linux environment.

Prerequisites

You have access to an OpenShift Container Platform account with cluster administrator access.
You have installed the OpenShift CLI (oc).

You have created an AWS account for the ccoctl utility to use with the following permissions:
Example 3.29. Required AWS permissions
Required iam permissions
- iam:CreateOpenIDConnectProvider
- iam:CreateRole
- iam:DeleteOpenIDConnectProvider
- iam:DeleteRole
- iam:DeleteRolePolicy
- iam:GetOpenIDConnectProvider
- iam:GetRole
- iam:GetUser
- iam:ListOpenIDConnectProviders
- iam:ListRolePolicies
- iam:ListRoles
- iam:PutRolePolicy
- iam:TagOpenIDConnectProvider
- iam:TagRole
Required s3 permissions
- s3:CreateBucket
- s3:DeleteBucket
- s3:DeleteObject
- s3:GetBucketAcl
- s3:GetBucketTagging
- s3:GetObject
- s3:GetObjectAcl
- s3:GetObjectTagging
- s3:ListBucket
- s3:PutBucketAcl
- s3:PutBucketPolicy
- s3:PutBucketPublicAccessBlock
- s3:PutBucketTagging
- s3:PutObject
- s3:PutObjectAcl
- s3:PutObjectTagging
Required cloudfront permissions
- cloudfront:ListCloudFrontOriginAccessIdentities
- cloudfront:ListDistributions
- cloudfront:ListTagsForResource
If you plan to store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL, the AWS account that runs the ccoctl utility requires the following additional permissions:
Example 3.30. Additional permissions for a private S3 bucket with CloudFront
- cloudfront:CreateCloudFrontOriginAccessIdentity
- cloudfront:CreateDistribution
- cloudfront:DeleteCloudFrontOriginAccessIdentity
- cloudfront:DeleteDistribution
- cloudfront:GetCloudFrontOriginAccessIdentity
- cloudfront:GetCloudFrontOriginAccessIdentityConfig
- cloudfront:GetDistribution
- cloudfront:TagResource
- cloudfront:UpdateDistribution
Note
These additional permissions support the use of the --create-private-s3-bucket option when processing credentials requests with the ccoctl aws create-all command.

Procedure

Set a variable for the OpenShift Container Platform release image by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
```
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
```
Note
Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.
Extract the ccoctl binary from the CCO container image within the OpenShift Container Platform release image by running the following command:
```
$ oc image extract $CCO_IMAGE \
  --file="/usr/bin/ccoctl.<rhel_version>" \1
  -a ~/.pull-secret
```
1
For <rhel_version>, specify the value that corresponds to the version of Red Hat Enterprise Linux (RHEL) that the host uses. If no value is specified, ccoctl.rhel8 is used by default. The following values are valid:
rhel8: Specify this value for hosts that use RHEL 8.
rhel9: Specify this value for hosts that use RHEL 9.
Change the permissions to make ccoctl executable by running the following command:
```
$ chmod 775 ccoctl.<rhel_version>
```

Verification

To verify that ccoctl is ready to use, display the help file. Use a relative file name when you run the command, for example:

$ ./ccoctl.rhel9

Example output

OpenShift credentials provisioning tool

Usage:
  ccoctl [command]

Available Commands:
  aws          Manage credentials objects for AWS cloud
  azure        Manage credentials objects for Azure
  gcp          Manage credentials objects for Google cloud
  help         Help about any command
  ibmcloud     Manage credentials objects for {ibm-cloud-title}
  nutanix      Manage credentials objects for Nutanix

Flags:
  -h, --help   help for ccoctl

Use "ccoctl [command] --help" for more information about a command.

3.10.7.2.2. Creating AWS resources with the Cloud Credential Operator utility

You have the following options when creating AWS resources:

You can use the ccoctl aws create-all command to create the AWS resources automatically. This is the quickest way to create the resources. See Creating AWS resources with a single command.
If you need to review the JSON files that the ccoctl tool creates before modifying AWS resources, or if the process the ccoctl tool uses to create AWS resources automatically does not meet the requirements of your organization, you can create the AWS resources individually. See Creating AWS resources individually.

3.10.7.2.2.1. Creating AWS resources with a single command

If the process the ccoctl tool uses to create AWS resources automatically meets the requirements of your organization, you can use the ccoctl aws create-all command to automate the creation of AWS resources.

Otherwise, you can create the AWS resources individually. For more information, see "Creating AWS resources individually".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Prerequisites

You must have:

Extracted and prepared the ccoctl binary.

Procedure

Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image by running the following command:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
1
The --included parameter includes only the manifests that your specific cluster configuration requires.
2
Specify the location of the install-config.yaml file.
3
Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
Note
This command might take a few moments to run.
Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-all \
  --name=<name> \1
  --region=<aws_region> \2
  --credentials-requests-dir=<path_to_credentials_requests_directory> \3
  --output-dir=<path_to_ccoctl_output_dir> \4
  --create-private-s3-bucket 5
```
1
Specify the name used to tag any cloud resources that are created for tracking.
2
Specify the AWS region in which cloud resources will be created.
3
Specify the directory containing the files for the component CredentialsRequest objects.
4
Optional: Specify the directory in which you want the ccoctl utility to create objects. By default, the utility creates objects in the directory in which the commands are run.
5
Optional: By default, the ccoctl utility stores the OpenID Connect (OIDC) configuration files in a public S3 bucket and uses the S3 URL as the public OIDC endpoint. To store the OIDC configuration in a private S3 bucket that is accessed by the IAM identity provider through a public CloudFront distribution URL instead, use the --create-private-s3-bucket parameter.
Note
If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.10.7.2.2.2. Creating AWS resources individually

You can use the ccoctl tool to create AWS resources individually. This option might be useful for an organization that shares the responsibility for creating these resources among different users or departments.

Otherwise, you can use the ccoctl aws create-all command to create the AWS resources automatically. For more information, see "Creating AWS resources with a single command".

Note

By default, ccoctl creates objects in the directory in which the commands are run. To create the objects in a different directory, use the --output-dir flag. This procedure uses <path_to_ccoctl_output_dir> to refer to this directory.

Some ccoctl commands make AWS API calls to create or modify AWS resources. You can use the --dry-run flag to avoid making API calls. Using this flag creates JSON files on the local file system instead. You can review and modify the JSON files and then apply them with the AWS CLI tool using the --cli-input-json parameters.

Prerequisites

Extract and prepare the ccoctl binary.

Procedure

Generate the public and private RSA key files that are used to set up the OpenID Connect provider for the cluster by running the following command:
```
$ ccoctl aws create-key-pair
```
Example output
```
2021/04/13 11:01:02 Generating RSA keypair
2021/04/13 11:01:03 Writing private key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.private
2021/04/13 11:01:03 Writing public key to /<path_to_ccoctl_output_dir>/serviceaccount-signer.public
2021/04/13 11:01:03 Copying signing key for use by installer
```
where serviceaccount-signer.private and serviceaccount-signer.public are the generated key files.
This command also creates a private key that the cluster requires during installation in /<path_to_ccoctl_output_dir>/tls/bound-service-account-signing-key.key.
Create an OpenID Connect identity provider and S3 bucket on AWS by running the following command:
```
$ ccoctl aws create-identity-provider \
  --name=<name> \1
  --region=<aws_region> \2
  --public-key-file=<path_to_ccoctl_output_dir>/serviceaccount-signer.public 3
```
1
<name> is the name used to tag any cloud resources that are created for tracking.
2
<aws-region> is the AWS region in which cloud resources will be created.
3
<path_to_ccoctl_output_dir> is the path to the public key file that the ccoctl aws create-key-pair command generated.
Example output
```
2021/04/13 11:16:09 Bucket <name>-oidc created
2021/04/13 11:16:10 OpenID Connect discovery document in the S3 bucket <name>-oidc at .well-known/openid-configuration updated
2021/04/13 11:16:10 Reading public key
2021/04/13 11:16:10 JSON web key set (JWKS) in the S3 bucket <name>-oidc at keys.json updated
2021/04/13 11:16:18 Identity Provider created with ARN: arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
where openid-configuration is a discovery document and keys.json is a JSON web key set file.
This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/cluster-authentication-02-config.yaml. This file sets the issuer URL field for the service account tokens that the cluster generates, so that the AWS IAM identity provider trusts the tokens.
Create IAM roles for each component in the cluster:
1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:
```
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')
```
2. Extract the list of CredentialsRequest objects from the OpenShift Container Platform release image:
```
$ oc adm release extract \
  --from=$RELEASE_IMAGE \
  --credentials-requests \
  --included \1
  --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \2
  --to=<path_to_directory_for_credentials_requests> 3
```
  1
  The --included parameter includes only the manifests that your specific cluster configuration requires.
  2
  Specify the location of the install-config.yaml file.
  3
  Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.
3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:
```
$ ccoctl aws create-iam-roles \
  --name=<name> \
  --region=<aws_region> \
  --credentials-requests-dir=<path_to_credentials_requests_directory> \
  --identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com
```
  Note
  For AWS environments that use alternative IAM API endpoints, such as GovCloud, you must also specify your region with the --region parameter.
  If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the --enable-tech-preview parameter.
  For each CredentialsRequest object, ccoctl creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy as defined in each CredentialsRequest object from the OpenShift Container Platform release image.

Verification

To verify that the OpenShift Container Platform secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

$ ls <path_to_ccoctl_output_dir>/manifests

Example output

cluster-authentication-02-config.yaml
openshift-cloud-credential-operator-cloud-credential-operator-iam-ro-creds-credentials.yaml
openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
openshift-cluster-api-capa-manager-bootstrap-credentials-credentials.yaml
openshift-cluster-csi-drivers-ebs-cloud-credentials-credentials.yaml
openshift-image-registry-installer-cloud-credentials-credentials.yaml
openshift-ingress-operator-cloud-credentials-credentials.yaml
openshift-machine-api-aws-cloud-credentials-credentials.yaml

You can verify that the IAM roles are created by querying AWS. For more information, refer to AWS documentation on listing IAM roles.

3.10.7.2.3. Incorporating the Cloud Credential Operator utility manifests

To implement short-term security credentials managed outside the cluster for individual components, you must move the manifest files that the Cloud Credential Operator utility (ccoctl) created to the correct directories for the installation program.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have configured the Cloud Credential Operator utility (ccoctl).
You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:
Sample configuration file snippet
```
apiVersion: v1
baseDomain: example.com
credentialsMode: Manual
# ...
```
If you have not previously created installation manifest files, do so by running the following command:
```
$ openshift-install create manifests --dir <installation_directory>
```
where <installation_directory> is the directory in which the installation program creates files.
Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:
```
$ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/
```
Copy the tls directory that contains the private key to the installation directory:
```
$ cp -a /<path_to_ccoctl_output_dir>/tls .
```

3.10.8. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.10.9. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.10.10. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

See Accessing the web console for more details about accessing and understanding the OpenShift Container Platform web console.

3.10.11. Next steps

Validating an installation.
Customize your cluster.
If necessary, you can opt out of remote health reporting.
If necessary, you can remove cloud provider credentials.

3.11. Installing a cluster with compute nodes on AWS Local Zones

You can quickly install an OpenShift Container Platform cluster on Amazon Web Services (AWS) Local Zones by setting the zone names in the edge compute pool of the install-config.yaml file, or install a cluster in an existing Amazon Virtual Private Cloud (VPC) with Local Zone subnets.

AWS Local Zones is an infrastructure that place Cloud Resources close to metropolitan regions. For more information, see the AWS Local Zones Documentation.

3.11.1. Infrastructure prerequisites

You reviewed details about OpenShift Container Platform installation and update processes.
You are familiar with Selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
Warning
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use key-based, long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
You downloaded the AWS CLI and installed it on your computer. See Install the AWS CLI Using the Bundled Installer (Linux, macOS, or UNIX) in the AWS documentation.
If you use a firewall, you configured it to allow the sites that your cluster must access.
You noted the region and supported AWS Local Zones locations to create the network resources in.
You read the AWS Local Zones features in the AWS documentation.
You added permissions for creating network resources that support AWS Local Zones to the Identity and Access Management (IAM) user or role. The following example enables a zone group that can provide a user or role access for creating network network resources that support AWS Local Zones.
Example of an additional IAM policy with the ec2:ModifyAvailabilityZoneGroup permission attached to an IAM user or role.
```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "ec2:ModifyAvailabilityZoneGroup"
      ],
      "Effect": "Allow",
      "Resource": "*"
    }
  ]
}
```

3.11.2. About AWS Local Zones and edge compute pool

Read the following sections to understand infrastructure behaviors and cluster limitations in an AWS Local Zones environment.

3.11.2.1. Cluster limitations in AWS Local Zones

Some limitations exist when you try to deploy a cluster with a default installation configuration in an Amazon Web Services (AWS) Local Zone.

Important

The following list details limitations when deploying a cluster in a pre-configured AWS zone:

The maximum transmission unit (MTU) between an Amazon EC2 instance in a zone and an Amazon EC2 instance in the Region is 1300. This causes the cluster-wide network MTU to change according to the network plugin that is used with the deployment.
Network resources such as Network Load Balancer (NLB), Classic Load Balancer, and Network Address Translation (NAT) Gateways are not globally supported.
For an OpenShift Container Platform cluster on AWS, the AWS Elastic Block Storage (EBS) gp3 type volume is the default for node volumes and the default for the storage class. This volume type is not globally available on zone locations. By default, the nodes running in zones are deployed with the gp2 EBS volume. The gp2-csi StorageClass parameter must be set when creating workloads on zone nodes.

If you want the installation program to automatically create Local Zone subnets for your OpenShift Container Platform cluster, specific configuration limitations apply with this method.

Important

The following configuration limitation applies when you set the installation program to automatically create subnets for your OpenShift Container Platform cluster:

When the installation program creates private subnets in AWS Local Zones, the program associates each subnet with the route table of its parent zone. This operation ensures that each private subnet can route egress traffic to the internet by way of NAT Gateways in an AWS Region.
If the parent-zone route table does not exist during cluster installation, the installation program associates any private subnet with the first available private route table in the Amazon Virtual Private Cloud (VPC). This approach is valid only for AWS Local Zones subnets in an OpenShift Container Platform cluster.

3.11.2.2. About edge compute pools

Edge compute nodes are tainted compute nodes that run in AWS Local Zones locations.

When deploying a cluster that uses Local Zones, consider the following points:

Amazon EC2 instances in the Local Zones are more expensive than Amazon EC2 instances in the Availability Zones.
The latency is lower between the applications running in AWS Local Zones and the end user. A latency impact exists for some workloads if, for example, ingress traffic is mixed between Local Zones and Availability Zones.

Important

Generally, the maximum transmission unit (MTU) between an Amazon EC2 instance in a Local Zones and an Amazon EC2 instance in the Region is 1300. The cluster network MTU must be always less than the EC2 MTU to account for the overhead. The specific overhead is determined by the network plugin. For example: OVN-Kubernetes has an overhead of 100 bytes.

The network plugin can provide additional features, such as IPsec, that also affect the MTU sizing.

For more information, see How Local Zones work in the AWS documentation.

OpenShift Container Platform 4.12 introduced a new compute pool, edge, that is designed for use in remote zones. The edge compute pool configuration is common between AWS Local Zones locations. Because of the type and size limitations of resources like EC2 and EBS on Local Zones resources, the default instance type can vary from the traditional compute pool.

The default Elastic Block Store (EBS) for Local Zones locations is gp2, which differs from the non-edge compute pool. The instance type used for each Local Zones on an edge compute pool also might differ from other compute pools, depending on the instance offerings on the zone.

The edge compute pool creates new labels that developers can use to deploy applications onto AWS Local Zones nodes. The new labels are:

node-role.kubernetes.io/edge=''
machine.openshift.io/zone-type=local-zone
machine.openshift.io/zone-group=$ZONE_GROUP_NAME

By default, the machine sets for the edge compute pool define the taint of NoSchedule to prevent other workloads from spreading on Local Zones instances. Users can only run user workloads if they define tolerations in the pod specification.

Additional resources

3.11.3. Installation prerequisites

Before you install a cluster in an AWS Local Zones environment, you must configure your infrastructure so that it can adopt Local Zone capabilities.

3.11.3.1. Opting in to an AWS Local Zones

If you plan to create subnets in AWS Local Zones, you must opt in to each zone group separately.

Prerequisites

You have installed the AWS CLI.
You have determined an AWS Region for where you want to deploy your OpenShift Container Platform cluster.
You have attached a permissive IAM policy to a user or role account that opts in to the zone group.

Procedure

List the zones that are available in your AWS Region by running the following command:
Example command for listing available AWS Local Zones in an AWS Region
```
$ aws --region "<value_of_AWS_Region>" ec2 describe-availability-zones \
    --query 'AvailabilityZones[].[{ZoneName: ZoneName, GroupName: GroupName, Status: OptInStatus}]' \
    --filters Name=zone-type,Values=local-zone \
    --all-availability-zones
```
Depending on the AWS Region, the list of available zones might be long. The command returns the following fields:
ZoneName
The name of the Local Zones.
GroupName
The group that comprises the zone. To opt in to the Region, save the name.
Status
The status of the Local Zones group. If the status is not-opted-in, you must opt in the GroupName as described in the next step.
Opt in to the zone group on your AWS account by running the following command:
```
$ aws ec2 modify-availability-zone-group \
    --group-name "<value_of_GroupName>" \1
    --opt-in-status opted-in
```
1
Replace <value_of_GroupName> with the name of the group of the Local Zones where you want to create subnets. For example, specify us-east-1-nyc-1 to use the zone us-east-1-nyc-1a (US East New York).

3.11.3.2. Obtaining an AWS Marketplace image

If you are deploying an OpenShift Container Platform cluster using an AWS Marketplace image, you must first subscribe through AWS. Subscribing to the offer provides you with the AMI ID that the installation program uses to deploy compute nodes.

Prerequisites

You have an AWS account to purchase the offer. This account does not have to be the same account that is used to install the cluster.

Procedure

Complete the OpenShift Container Platform subscription from the AWS Marketplace.
Record the AMI ID for your specific AWS Region. As part of the installation process, you must update the install-config.yaml file with this value before deploying the cluster.
Sample install-config.yaml file with AWS Marketplace compute nodes
```
apiVersion: v1
baseDomain: example.com
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      amiID: ami-06c4d345f7c207239 1
      type: m5.4xlarge
  replicas: 3
metadata:
  name: test-cluster
platform:
  aws:
    region: us-east-2 2
sshKey: ssh-ed25519 AAAA...
pullSecret: '{"auths": ...}'
```
1
The AMI ID from your AWS Marketplace subscription.
2
Your AMI ID is associated with a specific AWS Region. When creating the installation configuration file, ensure that you select the same AWS Region that you specified when configuring your subscription.

3.11.4. Preparing for the installation

Before you extend nodes to Local Zones, you must prepare certain resources for the cluster installation environment.

3.11.4.1. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.18. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

3.11.4.2. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform for use with AWS Local Zones.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.31. Machine types based on 64-bit x86 architecture for AWS Local Zones

c5.*
c5d.*
m6i.*
m5.*
r5.*
t3.*

Additional resources

See AWS Local Zones features in the AWS documentation.

3.11.4.3. Creating the installation configuration file

Generate and customize the installation configuration file that the installation program needs to deploy your cluster.

Prerequisites

You obtained the OpenShift Container Platform installation program for user-provisioned infrastructure and the pull secret for your cluster.
You checked that you are deploying your cluster to an AWS Region with an accompanying Red Hat Enterprise Linux CoreOS (RHCOS) AMI published by Red Hat. If you are deploying to an AWS Region that requires a custom AMI, such as an AWS GovCloud Region, you must create the install-config.yaml file manually.

Procedure

Create the install-config.yaml file.
1. Change to the directory that contains the installation program and run the following command:
```
$ ./openshift-install create install-config --dir <installation_directory> 1
```
  1
  For <installation_directory>, specify the directory name to store the files that the installation program creates.
  Important
  Specify an empty directory. Some installation assets, like bootstrap X.509 certificates have short expiration intervals, so you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
2. At the prompts, provide the configuration details for your cloud:
  1. Optional: Select an SSH key to use to access your cluster machines.
    Note
    For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
  2. Select aws as the platform to target.
  3. If you do not have an AWS profile stored on your computer, enter the AWS access key ID and secret access key for the user that you configured to run the installation program.
    Note
    The AWS access key ID and secret access key are stored in ~/.aws/credentials in the home directory of the current user on the installation host. You are prompted for the credentials by the installation program if the credentials for the exported profile are not present in the file. Any credentials that you provide to the installation program are stored in the file.
  4. Select the AWS Region to deploy the cluster to.
  5. Select the base domain for the Route 53 service that you configured for your cluster.
  6. Enter a descriptive name for your cluster.
  7. Paste the pull secret from Red Hat OpenShift Cluster Manager.
Optional: Back up the install-config.yaml file.
Important
The install-config.yaml file is consumed during the installation process. If you want to reuse the file, you must back it up now.

3.11.4.4. Examples of installation configuration files with edge compute pools

The following examples show install-config.yaml files that contain an edge machine pool configuration.

Configuration that uses an edge pool with a custom instance type

apiVersion: v1
baseDomain: devcluster.openshift.com
metadata:
  name: ipi-edgezone
compute:
- name: edge
  platform:
    aws:
      type: r5.2xlarge
platform:
  aws:
    region: us-west-2
pullSecret: '{"auths": ...}'
sshKey: ssh-ed25519 AAAA...

Instance types differ between locations. To verify availability in the Local Zones in which the cluster runs, see the AWS documentation.

Configuration that uses an edge pool with a custom Amazon Elastic Block Store (EBS) type

apiVersion: v1
baseDomain: devcluster.openshift.com
metadata:
  name: ipi-edgezone
compute:
- name: edge
  platform:
    aws:
      zones:
      - us-west-2-lax-1a
      - us-west-2-lax-1b
      - us-west-2-phx-2a
      rootVolume:
        type: gp3
        size: 120
platform:
  aws:
    region: us-west-2
pullSecret: '{"auths": ...}'
sshKey: ssh-ed25519 AAAA...

Elastic Block Storage (EBS) types differ between locations. Check the AWS documentation to verify availability in the Local Zones in which the cluster runs.

Configuration that uses an edge pool with custom security groups

apiVersion: v1
baseDomain: devcluster.openshift.com
metadata:
  name: ipi-edgezone
compute:
- name: edge
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-1 1
        - sg-2
platform:
  aws:
    region: us-west-2
pullSecret: '{"auths": ...}'
sshKey: ssh-ed25519 AAAA...

1: Specify the name of the security group as it is displayed on the Amazon EC2 console. Ensure that you include the sg prefix.

3.11.4.5. Customizing the cluster network MTU

Before you deploy a cluster on AWS, you can customize the cluster network maximum transmission unit (MTU) for your cluster network to meet the needs of your infrastructure.

By default, when you install a cluster with supported Local Zones capabilities, the MTU value for the cluster network is automatically adjusted to the lowest value that the network plugin accepts.

Important

Setting an unsupported MTU value for EC2 instances that operate in the Local Zones infrastructure can cause issues for your OpenShift Container Platform cluster.

If the Local Zone supports higher MTU values in between EC2 instances in the Local Zone and the AWS Region, you can manually configure the higher value to increase the network performance of the cluster network.

You can customize the MTU for a cluster by specifying the networking.clusterNetworkMTU parameter in the install-config.yaml configuration file.

Important

All subnets in Local Zones must support the higher MTU value, so that each node in that zone can successfully communicate with services in the AWS Region and deploy your workloads.

Example of overwriting the default MTU value

apiVersion: v1
baseDomain: devcluster.openshift.com
metadata:
  name: edge-zone
networking:
  clusterNetworkMTU: 8901
compute:
- name: edge
  platform:
    aws:
      zones:
      - us-west-2-lax-1a
      - us-west-2-lax-1b
platform:
  aws:
    region: us-west-2
pullSecret: '{"auths": ...}'
sshKey: ssh-ed25519 AAAA...

Additional resources

For more information about the maximum supported maximum transmission unit (MTU) value, see AWS resources supported in Local Zones in the AWS documentation.

3.11.5. Cluster installation options for an AWS Local Zones environment

Choose one of the following installation options to install an OpenShift Container Platform cluster on AWS with edge compute nodes defined in Local Zones:

Fully automated option: Installing a cluster to quickly extend compute nodes to edge compute pools, where the installation program automatically creates infrastructure resources for the OpenShift Container Platform cluster.
Existing VPC option: Installing a cluster on AWS into an existing VPC, where you supply Local Zones subnets to the install-config.yaml file.

Next steps

Choose one of the following options to install an OpenShift Container Platform cluster in an AWS Local Zones environment:

3.11.6. Install a cluster quickly in AWS Local Zones

For OpenShift Container Platform 4.17, you can quickly install a cluster on Amazon Web Services (AWS) to extend compute nodes to Local Zones locations. By using this installation route, the installation program automatically creates network resources and Local Zones subnets for each zone that you defined in your configuration file. To customize the installation, you must modify parameters in the install-config.yaml file before you deploy the cluster.

3.11.6.1. Modifying an installation configuration file to use AWS Local Zones

Modify an install-config.yaml file to include AWS Local Zones.

Prerequisites

You have configured an AWS account.
You added your AWS keys and AWS Region to your local AWS profile by running aws configure.
You are familiar with the configuration limitations that apply when you specify the installation program to automatically create subnets for your OpenShift Container Platform cluster.
You opted in to the Local Zones group for each zone.
You created an install-config.yaml file by using the procedure "Creating the installation configuration file".

Procedure

Modify the install-config.yaml file by specifying Local Zones names in the platform.aws.zones property of the edge compute pool.

# ...
platform:
  aws:
    region: <region_name> 1
compute:
- name: edge
  platform:
    aws:
      zones: 2
      - <local_zone_name>
#...

1: The AWS Region name.
2: The list of Local Zones names that you use must exist in the same AWS Region specified in the platform.aws.region field.

Example of a configuration to install a cluster in the us-west-2 AWS Region that extends edge nodes to Local Zones in Los Angeles and Las Vegas locations

apiVersion: v1
baseDomain: example.com
metadata:
  name: cluster-name
platform:
  aws:
    region: us-west-2
compute:
- name: edge
  platform:
    aws:
      zones:
      - us-west-2-lax-1a
      - us-west-2-lax-1b
      - us-west-2-las-1a
pullSecret: '{"auths": ...}'
sshKey: 'ssh-ed25519 AAAA...'
#...

Deploy your cluster.

Additional resources

Next steps

Deploying the cluster

3.11.7. Installing a cluster in an existing VPC that has Local Zone subnets

You can install a cluster into an existing Amazon Virtual Private Cloud (VPC) on Amazon Web Services (AWS). The installation program provisions the rest of the required infrastructure, which you can further customize. To customize the installation, modify parameters in the install-config.yaml file before you install the cluster.

Installing a cluster on AWS into an existing VPC requires extending compute nodes to the edge of the Cloud Infrastructure by using AWS Local Zones.

Local Zone subnets extend regular compute nodes to edge networks. Each edge compute nodes runs a user workload. After you create an Amazon Web Service (AWS) Local Zone environment, and you deploy your cluster, you can use edge compute nodes to create user workloads in Local Zone subnets.

Note

If you want to create private subnets, you must either modify the provided CloudFormation template or create your own template.

You can use a provided CloudFormation template to create network resources. Additionally, you can modify a template to customize your infrastructure or use the information that they contain to create AWS resources according to your company’s policies.

Important

The steps for performing an installer-provisioned infrastructure installation are provided for example purposes only. Installing a cluster in an existing VPC requires that you have knowledge of the cloud provider and the installation process of OpenShift Container Platform. You can use a CloudFormation template to assist you with completing these steps or to help model your own cluster installation. Instead of using the CloudFormation template to create resources, you can decide to use other methods for generating these resources.

3.11.7.1. Creating a VPC in AWS

You can create a Virtual Private Cloud (VPC), and subnets for all Local Zones locations, in Amazon Web Services (AWS) for your OpenShift Container Platform cluster to extend compute nodes to edge locations. You can further customize your VPC to meet your requirements, including a VPN and route tables. You can also add new Local Zones subnets not included at initial deployment.

You can use the provided CloudFormation template and a custom parameter file to create a stack of AWS resources that represent the VPC.

Note

If you do not use the provided CloudFormation template to create your AWS infrastructure, you must review the provided information and manually create the infrastructure. If your cluster does not initialize correctly, you might have to contact Red Hat support with your installation logs.

Prerequisites

You configured an AWS account.
You added your AWS keys and AWS Region to your local AWS profile by running aws configure.
You opted in to the AWS Local Zones on your AWS account.

Procedure

Create a JSON file that contains the parameter values that the CloudFormation template requires:
```
[
  {
    "ParameterKey": "VpcCidr", 1
    "ParameterValue": "10.0.0.0/16" 2
  },
  {
    "ParameterKey": "AvailabilityZoneCount", 3
    "ParameterValue": "3" 4
  },
  {
    "ParameterKey": "SubnetBits", 5
    "ParameterValue": "12" 6
  }
]
```
1
The CIDR block for the VPC.
2
Specify a CIDR block in the format x.x.x.x/16-24.
3
The number of availability zones to deploy the VPC in.
4
Specify an integer between 1 and 3.
5
The size of each subnet in each availability zone.
6
Specify an integer between 5 and 13, where 5 is /27 and 13 is /19.
Go to the section of the documentation named "CloudFormation template for the VPC", and then copy the syntax from the provided template. Save the copied template syntax as a YAML file on your local system. This template describes the VPC that your cluster requires.
Launch the CloudFormation template to create a stack of AWS resources that represent the VPC by running the following command:
Important
You must enter the command on a single line.
```
$ aws cloudformation create-stack --stack-name <name> \1
     --template-body file://<template>.yaml \2
     --parameters file://<parameters>.json  3
```
1
<name> is the name for the CloudFormation stack, such as cluster-vpc. You need the name of this stack if you remove the cluster.
2
<template> is the relative path to and name of the CloudFormation template YAML file that you saved.
3
<parameters> is the relative path and the name of the CloudFormation parameters JSON file.
Example output
```
arn:aws:cloudformation:us-east-1:123456789012:stack/cluster-vpc/dbedae40-2fd3-11eb-820e-12a48460849f
```

Confirm that the template components exist by running the following command:

$ aws cloudformation describe-stacks --stack-name <name>

After the StackStatus displays CREATE_COMPLETE, the output displays values for the following parameters. You must provide these parameter values to the other CloudFormation templates that you run to create your cluster.

`VpcId`	The ID of your VPC.
`PublicSubnetIds`	The IDs of the new public subnets.
`PrivateSubnetIds`	The IDs of the new private subnets.
`PublicRouteTableId`	The ID of the new public route table ID.

3.11.7.2. CloudFormation template for the VPC

You can use the following CloudFormation template to deploy the VPC that you need for your OpenShift Container Platform cluster.

Example 3.32. CloudFormation template for the VPC

AWSTemplateFormatVersion: 2010-09-09
Description: Template for Best Practice VPC with 1-3 AZs

Parameters:
  VpcCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.0.0/16
    Description: CIDR block for VPC.
    Type: String
  AvailabilityZoneCount:
    ConstraintDescription: "The number of availability zones. (Min: 1, Max: 3)"
    MinValue: 1
    MaxValue: 3
    Default: 1
    Description: "How many AZs to create VPC subnets for. (Min: 1, Max: 3)"
    Type: Number
  SubnetBits:
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/19-27.
    MinValue: 5
    MaxValue: 13
    Default: 12
    Description: "Size of each subnet to create within the availability zones. (Min: 5 = /27, Max: 13 = /19)"
    Type: Number

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
    - Label:
        default: "Network Configuration"
      Parameters:
      - VpcCidr
      - SubnetBits
    - Label:
        default: "Availability Zones"
      Parameters:
      - AvailabilityZoneCount
    ParameterLabels:
      AvailabilityZoneCount:
        default: "Availability Zone Count"
      VpcCidr:
        default: "VPC CIDR"
      SubnetBits:
        default: "Bits Per Subnet"

Conditions:
  DoAz3: !Equals [3, !Ref AvailabilityZoneCount]
  DoAz2: !Or [!Equals [2, !Ref AvailabilityZoneCount], Condition: DoAz3]

Resources:
  VPC:
    Type: "AWS::EC2::VPC"
    Properties:
      EnableDnsSupport: "true"
      EnableDnsHostnames: "true"
      CidrBlock: !Ref VpcCidr
  PublicSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [0, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 0
      - Fn::GetAZs: !Ref "AWS::Region"
  PublicSubnet2:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [1, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 1
      - Fn::GetAZs: !Ref "AWS::Region"
  PublicSubnet3:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [2, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 2
      - Fn::GetAZs: !Ref "AWS::Region"
  InternetGateway:
    Type: "AWS::EC2::InternetGateway"
  GatewayToInternet:
    Type: "AWS::EC2::VPCGatewayAttachment"
    Properties:
      VpcId: !Ref VPC
      InternetGatewayId: !Ref InternetGateway
  PublicRouteTable:
    Type: "AWS::EC2::RouteTable"
    Properties:
      VpcId: !Ref VPC
  PublicRoute:
    Type: "AWS::EC2::Route"
    DependsOn: GatewayToInternet
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref InternetGateway
  PublicSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet
      RouteTableId: !Ref PublicRouteTable
  PublicSubnetRouteTableAssociation2:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Condition: DoAz2
    Properties:
      SubnetId: !Ref PublicSubnet2
      RouteTableId: !Ref PublicRouteTable
  PublicSubnetRouteTableAssociation3:
    Condition: DoAz3
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet3
      RouteTableId: !Ref PublicRouteTable
  PrivateSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [3, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 0
      - Fn::GetAZs: !Ref "AWS::Region"
  PrivateRouteTable:
    Type: "AWS::EC2::RouteTable"
    Properties:
      VpcId: !Ref VPC
  PrivateSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PrivateSubnet
      RouteTableId: !Ref PrivateRouteTable
  NAT:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP
        - AllocationId
      SubnetId: !Ref PublicSubnet
  EIP:
    Type: "AWS::EC2::EIP"
    Properties:
      Domain: vpc
  Route:
    Type: "AWS::EC2::Route"
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT
  PrivateSubnet2:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [4, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 1
      - Fn::GetAZs: !Ref "AWS::Region"
  PrivateRouteTable2:
    Type: "AWS::EC2::RouteTable"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
  PrivateSubnetRouteTableAssociation2:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Condition: DoAz2
    Properties:
      SubnetId: !Ref PrivateSubnet2
      RouteTableId: !Ref PrivateRouteTable2
  NAT2:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Condition: DoAz2
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP2
        - AllocationId
      SubnetId: !Ref PublicSubnet2
  EIP2:
    Type: "AWS::EC2::EIP"
    Condition: DoAz2
    Properties:
      Domain: vpc
  Route2:
    Type: "AWS::EC2::Route"
    Condition: DoAz2
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable2
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT2
  PrivateSubnet3:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [5, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 2
      - Fn::GetAZs: !Ref "AWS::Region"
  PrivateRouteTable3:
    Type: "AWS::EC2::RouteTable"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
  PrivateSubnetRouteTableAssociation3:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Condition: DoAz3
    Properties:
      SubnetId: !Ref PrivateSubnet3
      RouteTableId: !Ref PrivateRouteTable3
  NAT3:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Condition: DoAz3
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP3
        - AllocationId
      SubnetId: !Ref PublicSubnet3
  EIP3:
    Type: "AWS::EC2::EIP"
    Condition: DoAz3
    Properties:
      Domain: vpc
  Route3:
    Type: "AWS::EC2::Route"
    Condition: DoAz3
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable3
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT3
  S3Endpoint:
    Type: AWS::EC2::VPCEndpoint
    Properties:
      PolicyDocument:
        Version: 2012-10-17
        Statement:
        - Effect: Allow
          Principal: '*'
          Action:
          - '*'
          Resource:
          - '*'
      RouteTableIds:
      - !Ref PublicRouteTable
      - !Ref PrivateRouteTable
      - !If [DoAz2, !Ref PrivateRouteTable2, !Ref "AWS::NoValue"]
      - !If [DoAz3, !Ref PrivateRouteTable3, !Ref "AWS::NoValue"]
      ServiceName: !Join
      - ''
      - - com.amazonaws.
        - !Ref 'AWS::Region'
        - .s3
      VpcId: !Ref VPC

Outputs:
  VpcId:
    Description: ID of the new VPC.
    Value: !Ref VPC
  PublicSubnetIds:
    Description: Subnet IDs of the public subnets.
    Value:
      !Join [
        ",",
        [!Ref PublicSubnet, !If [DoAz2, !Ref PublicSubnet2, !Ref "AWS::NoValue"], !If [DoAz3, !Ref PublicSubnet3, !Ref "AWS::NoValue"]]
      ]
  PrivateSubnetIds:
    Description: Subnet IDs of the private subnets.
    Value:
      !Join [
        ",",
        [!Ref PrivateSubnet, !If [DoAz2, !Ref PrivateSubnet2, !Ref "AWS::NoValue"], !If [DoAz3, !Ref PrivateSubnet3, !Ref "AWS::NoValue"]]
      ]
  PublicRouteTableId:
    Description: Public Route table ID
    Value: !Ref PublicRouteTable
  PrivateRouteTableIds:
    Description: Private Route table IDs
    Value:
      !Join [
        ",",
        [
          !Join ["=", [
            !Select [0, "Fn::GetAZs": !Ref "AWS::Region"],
            !Ref PrivateRouteTable
          ]],
          !If [DoAz2,
               !Join ["=", [!Select [1, "Fn::GetAZs": !Ref "AWS::Region"], !Ref PrivateRouteTable2]],
               !Ref "AWS::NoValue"
          ],
          !If [DoAz3,
               !Join ["=", [!Select [2, "Fn::GetAZs": !Ref "AWS::Region"], !Ref PrivateRouteTable3]],
               !Ref "AWS::NoValue"
          ]
        ]
      ]

3.11.7.3. Creating subnets in Local Zones

Before you configure a machine set for edge compute nodes in your OpenShift Container Platform cluster, you must create the subnets in Local Zones. Complete the following procedure for each Local Zone that you want to deploy compute nodes to.

You can use the provided CloudFormation template and create a CloudFormation stack. You can then use this stack to custom provision a subnet.

Note

If you do not use the provided CloudFormation template to create your AWS infrastructure, you must review the provided information and manually create the infrastructure. If your cluster does not initialize correctly, you might have to contact Red Hat support with your installation logs.

Prerequisites

You configured an AWS account.
You added your AWS keys and region to your local AWS profile by running aws configure.
You opted in to the Local Zones group.

Procedure

Go to the section of the documentation named "CloudFormation template for the VPC subnet", and copy the syntax from the template. Save the copied template syntax as a YAML file on your local system. This template describes the VPC that your cluster requires.
Run the following command to deploy the CloudFormation template, which creates a stack of AWS resources that represent the VPC:
```
$ aws cloudformation create-stack --stack-name <stack_name> \1
  --region ${CLUSTER_REGION} \
  --template-body file://<template>.yaml \2
  --parameters \
    ParameterKey=VpcId,ParameterValue="${VPC_ID}" \3
    ParameterKey=ClusterName,ParameterValue="${CLUSTER_NAME}" \4
    ParameterKey=ZoneName,ParameterValue="${ZONE_NAME}" \5
    ParameterKey=PublicRouteTableId,ParameterValue="${ROUTE_TABLE_PUB}" \6
    ParameterKey=PublicSubnetCidr,ParameterValue="${SUBNET_CIDR_PUB}" \7
    ParameterKey=PrivateRouteTableId,ParameterValue="${ROUTE_TABLE_PVT}" \8
    ParameterKey=PrivateSubnetCidr,ParameterValue="${SUBNET_CIDR_PVT}" 9
```
1
<stack_name> is the name for the CloudFormation stack, such as cluster-wl-<local_zone_shortname>. You need the name of this stack if you remove the cluster.
2
<template> is the relative path and the name of the CloudFormation template YAML file that you saved.
3
${VPC_ID} is the VPC ID, which is the value VpcID in the output of the CloudFormation template for the VPC.
4
${ZONE_NAME} is the value of Local Zones name to create the subnets.
5
${CLUSTER_NAME} is the value of ClusterName to be used as a prefix of the new AWS resource names.
6
${SUBNET_CIDR_PUB} is a valid CIDR block that is used to create the public subnet. This block must be part of the VPC CIDR block VpcCidr.
7
${ROUTE_TABLE_PVT} is the PrivateRouteTableId extracted from the output of the VPC’s CloudFormation stack.
8
${SUBNET_CIDR_PVT} is a valid CIDR block that is used to create the private subnet. This block must be part of the VPC CIDR block VpcCidr.

Example output

arn:aws:cloudformation:us-east-1:123456789012:stack/<stack_name>/dbedae40-820e-11eb-2fd3-12a48460849f

Verification

Confirm that the template components exist by running the following command:

$ aws cloudformation describe-stacks --stack-name <stack_name>

After the StackStatus displays CREATE_COMPLETE, the output displays values for the following parameters. Ensure that you provide these parameter values to the other CloudFormation templates that you run to create for your cluster.

`PublicSubnetId`	The IDs of the public subnet created by the CloudFormation stack.
`PrivateSubnetId`	The IDs of the private subnet created by the CloudFormation stack.

3.11.7.4. CloudFormation template for the VPC subnet

You can use the following CloudFormation template to deploy the private and public subnets in a zone on Local Zones infrastructure.

Example 3.33. CloudFormation template for VPC subnets

AWSTemplateFormatVersion: 2010-09-09
Description: Template for Best Practice Subnets (Public and Private)

Parameters:
  VpcId:
    Description: VPC ID that comprises all the target subnets.
    Type: String
    AllowedPattern: ^(?:(?:vpc)(?:-[a-zA-Z0-9]+)?\b|(?:[0-9]{1,3}\.){3}[0-9]{1,3})$
    ConstraintDescription: VPC ID must be with valid name, starting with vpc-.*.
  ClusterName:
    Description: Cluster name or prefix name to prepend the Name tag for each subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: ClusterName parameter must be specified.
  ZoneName:
    Description: Zone Name to create the subnets, such as us-west-2-lax-1a.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: ZoneName parameter must be specified.
  PublicRouteTableId:
    Description: Public Route Table ID to associate the public subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: PublicRouteTableId parameter must be specified.
  PublicSubnetCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.128.0/20
    Description: CIDR block for public subnet.
    Type: String
  PrivateRouteTableId:
    Description: Private Route Table ID to associate the private subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: PrivateRouteTableId parameter must be specified.
  PrivateSubnetCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.128.0/20
    Description: CIDR block for private subnet.
    Type: String


Resources:
  PublicSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VpcId
      CidrBlock: !Ref PublicSubnetCidr
      AvailabilityZone: !Ref ZoneName
      Tags:
      - Key: Name
        Value: !Join ['-', [!Ref ClusterName, "public", !Ref ZoneName]]

  PublicSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet
      RouteTableId: !Ref PublicRouteTableId

  PrivateSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VpcId
      CidrBlock: !Ref PrivateSubnetCidr
      AvailabilityZone: !Ref ZoneName
      Tags:
      - Key: Name
        Value: !Join ['-', [!Ref ClusterName, "private", !Ref ZoneName]]

  PrivateSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PrivateSubnet
      RouteTableId: !Ref PrivateRouteTableId

Outputs:
  PublicSubnetId:
    Description: Subnet ID of the public subnets.
    Value:
      !Join ["", [!Ref PublicSubnet]]

  PrivateSubnetId:
    Description: Subnet ID of the private subnets.
    Value:
      !Join ["", [!Ref PrivateSubnet]]

Additional resources

You can view details about the CloudFormation stacks that you create by navigating to the AWS CloudFormation console.

3.11.7.5. Modifying an installation configuration file to use AWS Local Zones subnets

Modify your install-config.yaml file to include Local Zones subnets.

Prerequisites

You created subnets by using the procedure "Creating subnets in Local Zones".
You created an install-config.yaml file by using the procedure "Creating the installation configuration file".

Procedure

Modify the install-config.yaml configuration file by specifying Local Zones subnets in the platform.aws.subnets parameter.
Example installation configuration file with Local Zones subnets
```
# ...
platform:
  aws:
    region: us-west-2
    subnets: 1
    - publicSubnetId-1
    - publicSubnetId-2
    - publicSubnetId-3
    - privateSubnetId-1
    - privateSubnetId-2
    - privateSubnetId-3
    - publicSubnetId-LocalZone-1
# ...
```
1
List of subnet IDs created in the zones: Availability and Local Zones.

Additional resources

For more information about viewing the CloudFormation stacks that you created, see AWS CloudFormation console.
For more information about AWS profile and credential configuration, see Configuration and credential file settings in the AWS documentation.

Next steps

Deploying the cluster

3.11.8. Optional: AWS security groups

By default, the installation program creates and attaches security groups to control plane and compute machines. The rules associated with the default security groups cannot be modified.

However, you can apply additional existing AWS security groups, which are associated with your existing VPC, to control plane and compute machines. Applying custom security groups can help you meet the security needs of your organization, in such cases where you need to control the incoming or outgoing traffic of these machines.

As part of the installation process, you apply custom security groups by modifying the install-config.yaml file before deploying the cluster.

For more information, see "Edge compute pools and AWS Local Zones".

3.11.9. Optional: Assign public IP addresses to edge compute nodes

If your workload requires deploying the edge compute nodes in public subnets on Local Zones infrastructure, you can configure the machine set manifests when installing a cluster.

AWS Local Zones infrastructure accesses the network traffic in a specified zone, so applications can take advantage of lower latency when serving end users that are closer to that zone.

The default setting that deploys compute nodes in private subnets might not meet your needs, so consider creating edge compute nodes in public subnets when you want to apply more customization to your infrastructure.

Important

By default, OpenShift Container Platform deploy the compute nodes in private subnets. For best performance, consider placing compute nodes in subnets that have their Public IP addresses attached to the subnets.

You must create additional security groups, but ensure that you only open the groups' rules over the internet when you really need to.

Procedure

Change to the directory that contains the installation program and generate the manifest files. Ensure that the installation manifests get created at the openshift and manifests directory level.
```
$ ./openshift-install create manifests --dir <installation_directory>
```

Edit the machine set manifest that the installation program generates for the Local Zones, so that the manifest gets deployed in public subnets. Specify true for the spec.template.spec.providerSpec.value.publicIP parameter.

Example machine set manifest configuration for installing a cluster quickly in Local Zones

spec:
  template:
    spec:
      providerSpec:
        value:
          publicIp: true
          subnet:
            filters:
              - name: tag:Name
                values:
                  - ${INFRA_ID}-public-${ZONE_NAME}

Example machine set manifest configuration for installing a cluster in an existing VPC that has Local Zones subnets

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  name: <infrastructure_id>-edge-<zone>
  namespace: openshift-machine-api
spec:
  template:
    spec:
      providerSpec:
        value:
          publicIp: true

3.11.10. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.11.11. Verifying the status of the deployed cluster

Verify that your OpenShift Container Platform successfully deployed on AWS Local Zones.

3.11.11.1. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.11.11.2. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

Accessing the web console

3.11.11.3. Verifying nodes that were created with edge compute pool

After you install a cluster that uses AWS Local Zones infrastructure, check the status of the machine that was created by the machine set manifests created during installation.

To check the machine sets created from the subnet you added to the install-config.yaml file, run the following command:

$ oc get machineset -n openshift-machine-api

Example output

NAME                                  DESIRED   CURRENT   READY   AVAILABLE   AGE
cluster-7xw5g-edge-us-east-1-nyc-1a   1         1         1       1           3h4m
cluster-7xw5g-worker-us-east-1a       1         1         1       1           3h4m
cluster-7xw5g-worker-us-east-1b       1         1         1       1           3h4m
cluster-7xw5g-worker-us-east-1c       1         1         1       1           3h4m

To check the machines that were created from the machine sets, run the following command:

$ oc get machines -n openshift-machine-api

Example output

NAME                                        PHASE     TYPE          REGION      ZONE               AGE
cluster-7xw5g-edge-us-east-1-nyc-1a-wbclh   Running   c5d.2xlarge   us-east-1   us-east-1-nyc-1a   3h
cluster-7xw5g-master-0                      Running   m6i.xlarge    us-east-1   us-east-1a         3h4m
cluster-7xw5g-master-1                      Running   m6i.xlarge    us-east-1   us-east-1b         3h4m
cluster-7xw5g-master-2                      Running   m6i.xlarge    us-east-1   us-east-1c         3h4m
cluster-7xw5g-worker-us-east-1a-rtp45       Running   m6i.xlarge    us-east-1   us-east-1a         3h
cluster-7xw5g-worker-us-east-1b-glm7c       Running   m6i.xlarge    us-east-1   us-east-1b         3h
cluster-7xw5g-worker-us-east-1c-qfvz4       Running   m6i.xlarge    us-east-1   us-east-1c         3h

To check nodes with edge roles, run the following command:

$ oc get nodes -l node-role.kubernetes.io/edge

Example output

NAME                           STATUS   ROLES         AGE    VERSION
ip-10-0-207-188.ec2.internal   Ready    edge,worker   172m   v1.25.2+d2e245f

Next steps

Validating an installation.
If necessary, you can opt out of remote health.

3.12. Installing a cluster with compute nodes on AWS Wavelength Zones

You can quickly install an OpenShift Container Platform cluster on Amazon Web Services (AWS) Wavelength Zones by setting the zone names in the edge compute pool of the install-config.yaml file, or install a cluster in an existing Amazon Virtual Private Cloud (VPC) with Wavelength Zone subnets.

AWS Wavelength Zones is an infrastructure that AWS configured for mobile edge computing (MEC) applications.

A Wavelength Zone embeds AWS compute and storage services within the 5G network of a communication service provider (CSP). By placing application servers in a Wavelength Zone, the application traffic from your 5G devices can stay in the 5G network. The application traffic of the device reaches the target server directly, making latency a non-issue.

Additional resources

See Wavelength Zones in the AWS documentation.

3.12.1. Infrastructure prerequisites

You reviewed details about OpenShift Container Platform installation and update processes.
You are familiar with Selecting a cluster installation method and preparing it for users.
You configured an AWS account to host the cluster.
Warning
If you have an AWS profile stored on your computer, it must not use a temporary session token that you generated while using a multi-factor authentication device. The cluster continues to use your current AWS credentials to create AWS resources for the entire life of the cluster, so you must use key-based, long-term credentials. To generate appropriate keys, see Managing Access Keys for IAM Users in the AWS documentation. You can supply the keys when you run the installation program.
You downloaded the AWS CLI and installed it on your computer. See Install the AWS CLI Using the Bundled Installer (Linux, macOS, or UNIX) in the AWS documentation.
If you use a firewall, you configured it to allow the sites that your cluster must access.
You noted the region and supported AWS Wavelength Zone locations to create the network resources in.
You read AWS Wavelength features in the AWS documentation.
You read the Quotas and considerations for Wavelength Zones in the AWS documentation.

You added permissions for creating network resources that support AWS Wavelength Zones to the Identity and Access Management (IAM) user or role. For example:

Example of an additional IAM policy that attached ec2:ModifyAvailabilityZoneGroup, ec2:CreateCarrierGateway, and ec2:DeleteCarrierGateway permissions to a user or role

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "ec2:DeleteCarrierGateway",
        "ec2:CreateCarrierGateway"
      ],
      "Resource": "*"
    },
    {
      "Action": [
        "ec2:ModifyAvailabilityZoneGroup"
      ],
      "Effect": "Allow",
      "Resource": "*"
    }
  ]
}

3.12.2. About AWS Wavelength Zones and edge compute pool

Read the following sections to understand infrastructure behaviors and cluster limitations in an AWS Wavelength Zones environment.

3.12.2.1. Cluster limitations in AWS Wavelength Zones

Some limitations exist when you try to deploy a cluster with a default installation configuration in an Amazon Web Services (AWS) Wavelength Zone.

Important

The following list details limitations when deploying a cluster in a pre-configured AWS zone:

The maximum transmission unit (MTU) between an Amazon EC2 instance in a zone and an Amazon EC2 instance in the Region is 1300. This causes the cluster-wide network MTU to change according to the network plugin that is used with the deployment.
Network resources such as Network Load Balancer (NLB), Classic Load Balancer, and Network Address Translation (NAT) Gateways are not globally supported.
For an OpenShift Container Platform cluster on AWS, the AWS Elastic Block Storage (EBS) gp3 type volume is the default for node volumes and the default for the storage class. This volume type is not globally available on zone locations. By default, the nodes running in zones are deployed with the gp2 EBS volume. The gp2-csi StorageClass parameter must be set when creating workloads on zone nodes.

If you want the installation program to automatically create Wavelength Zone subnets for your OpenShift Container Platform cluster, specific configuration limitations apply with this method. The following note details some of these limitations. For other limitations, ensure that you read the "Quotas and considerations for Wavelength Zones" document that Red Hat provides in the "Infrastructure prerequisites" section.

Important

The following configuration limitation applies when you set the installation program to automatically create subnets for your OpenShift Container Platform cluster:

When the installation program creates private subnets in AWS Wavelength Zones, the program associates each subnet with the route table of its parent zone. This operation ensures that each private subnet can route egress traffic to the internet by way of NAT Gateways in an AWS Region.
If the parent-zone route table does not exist during cluster installation, the installation program associates any private subnet with the first available private route table in the Amazon Virtual Private Cloud (VPC). This approach is valid only for AWS Wavelength Zones subnets in an OpenShift Container Platform cluster.

3.12.2.2. About edge compute pools

Edge compute nodes are tainted compute nodes that run in AWS Wavelength Zones locations.

When deploying a cluster that uses Wavelength Zones, consider the following points:

Amazon EC2 instances in the Wavelength Zones are more expensive than Amazon EC2 instances in the Availability Zones.
The latency is lower between the applications running in AWS Wavelength Zones and the end user. A latency impact exists for some workloads if, for example, ingress traffic is mixed between Wavelength Zones and Availability Zones.

Important

Generally, the maximum transmission unit (MTU) between an Amazon EC2 instance in a Wavelength Zones and an Amazon EC2 instance in the Region is 1300. The cluster network MTU must be always less than the EC2 MTU to account for the overhead. The specific overhead is determined by the network plugin. For example: OVN-Kubernetes has an overhead of 100 bytes.

The network plugin can provide additional features, such as IPsec, that also affect the MTU sizing.

For more information, see How AWS Wavelength work in the AWS documentation.

OpenShift Container Platform 4.12 introduced a new compute pool, edge, that is designed for use in remote zones. The edge compute pool configuration is common between AWS Wavelength Zones locations. Because of the type and size limitations of resources like EC2 and EBS on Wavelength Zones resources, the default instance type can vary from the traditional compute pool.

The default Elastic Block Store (EBS) for Wavelength Zones locations is gp2, which differs from the non-edge compute pool. The instance type used for each Wavelength Zones on an edge compute pool also might differ from other compute pools, depending on the instance offerings on the zone.

The edge compute pool creates new labels that developers can use to deploy applications onto AWS Wavelength Zones nodes. The new labels are:

node-role.kubernetes.io/edge=''
machine.openshift.io/zone-type=wavelength-zone
machine.openshift.io/zone-group=$ZONE_GROUP_NAME

By default, the machine sets for the edge compute pool define the taint of NoSchedule to prevent other workloads from spreading on Wavelength Zones instances. Users can only run user workloads if they define tolerations in the pod specification.

Additional resources

3.12.3. Installation prerequisites

Before you install a cluster in an AWS Wavelength Zones environment, you must configure your infrastructure so that it can adopt Wavelength Zone capabilities.

3.12.3.1. Opting in to an AWS Wavelength Zones

If you plan to create subnets in AWS Wavelength Zones, you must opt in to each zone group separately.

Prerequisites

You have installed the AWS CLI.
You have determined an AWS Region for where you want to deploy your OpenShift Container Platform cluster.
You have attached a permissive IAM policy to a user or role account that opts in to the zone group.

Procedure

List the zones that are available in your AWS Region by running the following command:
Example command for listing available AWS Wavelength Zones in an AWS Region
```
$ aws --region "<value_of_AWS_Region>" ec2 describe-availability-zones \
    --query 'AvailabilityZones[].[{ZoneName: ZoneName, GroupName: GroupName, Status: OptInStatus}]' \
    --filters Name=zone-type,Values=wavelength-zone \
    --all-availability-zones
```
Depending on the AWS Region, the list of available zones might be long. The command returns the following fields:
ZoneName
The name of the Wavelength Zones.
GroupName
The group that comprises the zone. To opt in to the Region, save the name.
Status
The status of the Wavelength Zones group. If the status is not-opted-in, you must opt in the GroupName as described in the next step.
Opt in to the zone group on your AWS account by running the following command:
```
$ aws ec2 modify-availability-zone-group \
    --group-name "<value_of_GroupName>" \1
    --opt-in-status opted-in
```
1
Replace <value_of_GroupName> with the name of the group of the Wavelength Zones where you want to create subnets. As an example for Wavelength Zones, specify us-east-1-wl1 to use the zone us-east-1-wl1-nyc-wlz-1 (US East New York).

3.12.3.2. Obtaining an AWS Marketplace image

If you are deploying an OpenShift Container Platform cluster using an AWS Marketplace image, you must first subscribe through AWS. Subscribing to the offer provides you with the AMI ID that the installation program uses to deploy compute nodes.

Prerequisites

You have an AWS account to purchase the offer. This account does not have to be the same account that is used to install the cluster.

Procedure

Complete the OpenShift Container Platform subscription from the AWS Marketplace.
Record the AMI ID for your specific AWS Region. As part of the installation process, you must update the install-config.yaml file with this value before deploying the cluster.
Sample install-config.yaml file with AWS Marketplace compute nodes
```
apiVersion: v1
baseDomain: example.com
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      amiID: ami-06c4d345f7c207239 1
      type: m5.4xlarge
  replicas: 3
metadata:
  name: test-cluster
platform:
  aws:
    region: us-east-2 2
sshKey: ssh-ed25519 AAAA...
pullSecret: '{"auths": ...}'
```
1
The AMI ID from your AWS Marketplace subscription.
2
Your AMI ID is associated with a specific AWS Region. When creating the installation configuration file, ensure that you select the same AWS Region that you specified when configuring your subscription.

3.12.4. Preparing for the installation

Before you extend nodes to Wavelength Zones, you must prepare certain resources for the cluster installation environment.

3.12.4.1. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Table 3.19. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Storage	Input/Output Per Second (IOPS)^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.6 and later ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or Hyper-Threading, is not enabled. When enabled, use the following formula to calculate the corresponding ratio: (threads per core × cores) × sockets = vCPUs.
OpenShift Container Platform and Kubernetes are sensitive to disk performance, and faster storage is recommended, particularly for etcd on the control plane nodes which require a 10 ms p99 fsync duration. Note that on many cloud platforms, storage size and IOPS scale together, so you might need to over-allocate storage volume to obtain sufficient performance.
As with all user-provisioned installations, if you choose to use RHEL compute machines in your cluster, you take responsibility for all operating system life cycle management and maintenance, including performing system updates, applying patches, and completing all other required tasks. Use of RHEL 7 compute machines is deprecated and has been removed in OpenShift Container Platform 4.10 and later.

Note

As of OpenShift Container Platform version 4.13, RHCOS is based on RHEL version 9.2, which updates the micro-architecture requirements. The following list contains the minimum instruction set architectures (ISA) that each architecture requires:

x86-64 architecture requires x86-64-v2 ISA
ARM64 architecture requires ARMv8.0-A ISA
IBM Power architecture requires Power 9 ISA
s390x architecture requires z14 ISA

For more information, see RHEL Architectures.

If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in OpenShift Container Platform.

3.12.4.2. Tested instance types for AWS

The following Amazon Web Services (AWS) instance types have been tested with OpenShift Container Platform for use with AWS Wavelength Zones.

Note

Use the machine types included in the following charts for your AWS instances. If you use an instance type that is not listed in the chart, ensure that the instance size you use matches the minimum resource requirements that are listed in the section named "Minimum resource requirements for cluster installation".

Example 3.34. Machine types based on 64-bit x86 architecture for AWS Wavelength Zones

r5.*
t3.*

Additional resources

See AWS Wavelength features in the AWS documentation.

3.12.4.3. Creating the installation configuration file

Generate and customize the installation configuration file that the installation program needs to deploy your cluster.

Prerequisites

You obtained the OpenShift Container Platform installation program and the pull secret for your cluster.
You checked that you are deploying your cluster to an AWS Region with an accompanying Red Hat Enterprise Linux CoreOS (RHCOS) AMI published by Red Hat. If you are deploying to an AWS Region that requires a custom AMI, such as an AWS GovCloud Region, you must create the install-config.yaml file manually.

Procedure

Create the install-config.yaml file.
1. Change to the directory that contains the installation program and run the following command:
```
$ ./openshift-install create install-config --dir <installation_directory> 1
```
  1
  For <installation_directory>, specify the directory name to store the files that the installation program creates.
  Important
  Specify an empty directory. Some installation assets, like bootstrap X.509 certificates have short expiration intervals, so you must not reuse an installation directory. If you want to reuse individual files from another cluster installation, you can copy them into your directory. However, the file names for the installation assets might change between releases. Use caution when copying installation files from an earlier OpenShift Container Platform version.
2. At the prompts, provide the configuration details for your cloud:
  1. Optional: Select an SSH key to use to access your cluster machines.
    Note
    For production OpenShift Container Platform clusters on which you want to perform installation debugging or disaster recovery, specify an SSH key that your ssh-agent process uses.
  2. Select aws as the platform to target.
  3. If you do not have an AWS profile stored on your computer, enter the AWS access key ID and secret access key for the user that you configured to run the installation program.
    Note
    The AWS access key ID and secret access key are stored in ~/.aws/credentials in the home directory of the current user on the installation host. You are prompted for the credentials by the installation program if the credentials for the exported profile are not present in the file. Any credentials that you provide to the installation program are stored in the file.
  4. Select the AWS Region to deploy the cluster to.
  5. Select the base domain for the Route 53 service that you configured for your cluster.
  6. Enter a descriptive name for your cluster.
  7. Paste the pull secret from Red Hat OpenShift Cluster Manager.
Optional: Back up the install-config.yaml file.
Important
The install-config.yaml file is consumed during the installation process. If you want to reuse the file, you must back it up now.

3.12.4.4. Examples of installation configuration files with edge compute pools

The following examples show install-config.yaml files that contain an edge machine pool configuration.

Configuration that uses an edge pool with a custom instance type

apiVersion: v1
baseDomain: devcluster.openshift.com
metadata:
  name: ipi-edgezone
compute:
- name: edge
  platform:
    aws:
      type: r5.2xlarge
platform:
  aws:
    region: us-west-2
pullSecret: '{"auths": ...}'
sshKey: ssh-ed25519 AAAA...

Instance types differ between locations. To verify availability in the Wavelength Zones in which the cluster runs, see the AWS documentation.

Configuration that uses an edge pool with custom security groups

apiVersion: v1
baseDomain: devcluster.openshift.com
metadata:
  name: ipi-edgezone
compute:
- name: edge
  platform:
    aws:
      additionalSecurityGroupIDs:
        - sg-1 1
        - sg-2
platform:
  aws:
    region: us-west-2
pullSecret: '{"auths": ...}'
sshKey: ssh-ed25519 AAAA...

1: Specify the name of the security group as it is displayed on the Amazon EC2 console. Ensure that you include the sg prefix.

3.12.5. Cluster installation options for an AWS Wavelength Zones environment

Choose one of the following installation options to install an OpenShift Container Platform cluster on AWS with edge compute nodes defined in Wavelength Zones:

Fully automated option: Installing a cluster to quickly extend compute nodes to edge compute pools, where the installation program automatically creates infrastructure resources for the OpenShift Container Platform cluster.
Existing VPC option: Installing a cluster on AWS into an existing VPC, where you supply Wavelength Zones subnets to the install-config.yaml file.

Next steps

Choose one of the following options to install an OpenShift Container Platform cluster in an AWS Wavelength Zones environment:

3.12.6. Install a cluster quickly in AWS Wavelength Zones

For OpenShift Container Platform 4.17, you can quickly install a cluster on Amazon Web Services (AWS) to extend compute nodes to Wavelength Zones locations. By using this installation route, the installation program automatically creates network resources and Wavelength Zones subnets for each zone that you defined in your configuration file. To customize the installation, you must modify parameters in the install-config.yaml file before you deploy the cluster.

3.12.6.1. Modifying an installation configuration file to use AWS Wavelength Zones

Modify an install-config.yaml file to include AWS Wavelength Zones.

Prerequisites

You have configured an AWS account.
You added your AWS keys and AWS Region to your local AWS profile by running aws configure.
You are familiar with the configuration limitations that apply when you specify the installation program to automatically create subnets for your OpenShift Container Platform cluster.
You opted in to the Wavelength Zones group for each zone.
You created an install-config.yaml file by using the procedure "Creating the installation configuration file".

Procedure

Modify the install-config.yaml file by specifying Wavelength Zones names in the platform.aws.zones property of the edge compute pool.

# ...
platform:
  aws:
    region: <region_name> 1
compute:
- name: edge
  platform:
    aws:
      zones: 2
      - <wavelength_zone_name>
#...

1: The AWS Region name.
2: The list of Wavelength Zones names that you use must exist in the same AWS Region specified in the platform.aws.region field.

Example of a configuration to install a cluster in the us-west-2 AWS Region that extends edge nodes to Wavelength Zones in Los Angeles and Las Vegas locations

apiVersion: v1
baseDomain: example.com
metadata:
  name: cluster-name
platform:
  aws:
    region: us-west-2
compute:
- name: edge
  platform:
    aws:
      zones:
      - us-west-2-wl1-lax-wlz-1
      - us-west-2-wl1-las-wlz-1
pullSecret: '{"auths": ...}'
sshKey: 'ssh-ed25519 AAAA...'
#...

Deploy your cluster.

Additional resources

Next steps

Deploying the cluster

3.12.7. Installing a cluster in an existing VPC that has Wavelength Zone subnets

You can install a cluster into an existing Amazon Virtual Private Cloud (VPC) on Amazon Web Services (AWS). The installation program provisions the rest of the required infrastructure, which you can further customize. To customize the installation, modify parameters in the install-config.yaml file before you install the cluster.

Installing a cluster on AWS into an existing VPC requires extending compute nodes to the edge of the Cloud Infrastructure by using AWS Wavelength Zones.

You can use a provided CloudFormation template to create network resources. Additionally, you can modify a template to customize your infrastructure or use the information that they contain to create AWS resources according to your company’s policies.

Important

The steps for performing an installer-provisioned infrastructure installation are provided for example purposes only. Installing a cluster in an existing VPC requires that you have knowledge of the cloud provider and the installation process of OpenShift Container Platform. You can use a CloudFormation template to assist you with completing these steps or to help model your own cluster installation. Instead of using the CloudFormation template to create resources, you can decide to use other methods for generating these resources.

3.12.7.1. Creating a VPC in AWS

You can create a Virtual Private Cloud (VPC), and subnets for all Wavelength Zones locations, in Amazon Web Services (AWS) for your OpenShift Container Platform cluster to extend compute nodes to edge locations. You can further customize your VPC to meet your requirements, including a VPN and route tables. You can also add new Wavelength Zones subnets not included at initial deployment.

You can use the provided CloudFormation template and a custom parameter file to create a stack of AWS resources that represent the VPC.

Note

If you do not use the provided CloudFormation template to create your AWS infrastructure, you must review the provided information and manually create the infrastructure. If your cluster does not initialize correctly, you might have to contact Red Hat support with your installation logs.

Prerequisites

You configured an AWS account.
You added your AWS keys and AWS Region to your local AWS profile by running aws configure.
You opted in to the AWS Wavelength Zones on your AWS account.

Procedure

Create a JSON file that contains the parameter values that the CloudFormation template requires:
```
[
  {
    "ParameterKey": "VpcCidr", 1
    "ParameterValue": "10.0.0.0/16" 2
  },
  {
    "ParameterKey": "AvailabilityZoneCount", 3
    "ParameterValue": "3" 4
  },
  {
    "ParameterKey": "SubnetBits", 5
    "ParameterValue": "12" 6
  }
]
```
1
The CIDR block for the VPC.
2
Specify a CIDR block in the format x.x.x.x/16-24.
3
The number of availability zones to deploy the VPC in.
4
Specify an integer between 1 and 3.
5
The size of each subnet in each availability zone.
6
Specify an integer between 5 and 13, where 5 is /27 and 13 is /19.
Go to the section of the documentation named "CloudFormation template for the VPC", and then copy the syntax from the provided template. Save the copied template syntax as a YAML file on your local system. This template describes the VPC that your cluster requires.
Launch the CloudFormation template to create a stack of AWS resources that represent the VPC by running the following command:
Important
You must enter the command on a single line.
```
$ aws cloudformation create-stack --stack-name <name> \1
     --template-body file://<template>.yaml \2
     --parameters file://<parameters>.json  3
```
1
<name> is the name for the CloudFormation stack, such as cluster-vpc. You need the name of this stack if you remove the cluster.
2
<template> is the relative path to and name of the CloudFormation template YAML file that you saved.
3
<parameters> is the relative path and the name of the CloudFormation parameters JSON file.
Example output
```
arn:aws:cloudformation:us-east-1:123456789012:stack/cluster-vpc/dbedae40-2fd3-11eb-820e-12a48460849f
```

Confirm that the template components exist by running the following command:

$ aws cloudformation describe-stacks --stack-name <name>

After the StackStatus displays CREATE_COMPLETE, the output displays values for the following parameters. You must provide these parameter values to the other CloudFormation templates that you run to create your cluster.

`VpcId`	The ID of your VPC.
`PublicSubnetIds`	The IDs of the new public subnets.
`PrivateSubnetIds`	The IDs of the new private subnets.
`PublicRouteTableId`	The ID of the new public route table ID.

3.12.7.2. CloudFormation template for the VPC

You can use the following CloudFormation template to deploy the VPC that you need for your OpenShift Container Platform cluster.

Example 3.35. CloudFormation template for the VPC

AWSTemplateFormatVersion: 2010-09-09
Description: Template for Best Practice VPC with 1-3 AZs

Parameters:
  VpcCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.0.0/16
    Description: CIDR block for VPC.
    Type: String
  AvailabilityZoneCount:
    ConstraintDescription: "The number of availability zones. (Min: 1, Max: 3)"
    MinValue: 1
    MaxValue: 3
    Default: 1
    Description: "How many AZs to create VPC subnets for. (Min: 1, Max: 3)"
    Type: Number
  SubnetBits:
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/19-27.
    MinValue: 5
    MaxValue: 13
    Default: 12
    Description: "Size of each subnet to create within the availability zones. (Min: 5 = /27, Max: 13 = /19)"
    Type: Number

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
    - Label:
        default: "Network Configuration"
      Parameters:
      - VpcCidr
      - SubnetBits
    - Label:
        default: "Availability Zones"
      Parameters:
      - AvailabilityZoneCount
    ParameterLabels:
      AvailabilityZoneCount:
        default: "Availability Zone Count"
      VpcCidr:
        default: "VPC CIDR"
      SubnetBits:
        default: "Bits Per Subnet"

Conditions:
  DoAz3: !Equals [3, !Ref AvailabilityZoneCount]
  DoAz2: !Or [!Equals [2, !Ref AvailabilityZoneCount], Condition: DoAz3]

Resources:
  VPC:
    Type: "AWS::EC2::VPC"
    Properties:
      EnableDnsSupport: "true"
      EnableDnsHostnames: "true"
      CidrBlock: !Ref VpcCidr
  PublicSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [0, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 0
      - Fn::GetAZs: !Ref "AWS::Region"
  PublicSubnet2:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [1, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 1
      - Fn::GetAZs: !Ref "AWS::Region"
  PublicSubnet3:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [2, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 2
      - Fn::GetAZs: !Ref "AWS::Region"
  InternetGateway:
    Type: "AWS::EC2::InternetGateway"
  GatewayToInternet:
    Type: "AWS::EC2::VPCGatewayAttachment"
    Properties:
      VpcId: !Ref VPC
      InternetGatewayId: !Ref InternetGateway
  PublicRouteTable:
    Type: "AWS::EC2::RouteTable"
    Properties:
      VpcId: !Ref VPC
  PublicRoute:
    Type: "AWS::EC2::Route"
    DependsOn: GatewayToInternet
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref InternetGateway
  PublicSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet
      RouteTableId: !Ref PublicRouteTable
  PublicSubnetRouteTableAssociation2:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Condition: DoAz2
    Properties:
      SubnetId: !Ref PublicSubnet2
      RouteTableId: !Ref PublicRouteTable
  PublicSubnetRouteTableAssociation3:
    Condition: DoAz3
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet3
      RouteTableId: !Ref PublicRouteTable
  PrivateSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [3, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 0
      - Fn::GetAZs: !Ref "AWS::Region"
  PrivateRouteTable:
    Type: "AWS::EC2::RouteTable"
    Properties:
      VpcId: !Ref VPC
  PrivateSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PrivateSubnet
      RouteTableId: !Ref PrivateRouteTable
  NAT:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP
        - AllocationId
      SubnetId: !Ref PublicSubnet
  EIP:
    Type: "AWS::EC2::EIP"
    Properties:
      Domain: vpc
  Route:
    Type: "AWS::EC2::Route"
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT
  PrivateSubnet2:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [4, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 1
      - Fn::GetAZs: !Ref "AWS::Region"
  PrivateRouteTable2:
    Type: "AWS::EC2::RouteTable"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
  PrivateSubnetRouteTableAssociation2:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Condition: DoAz2
    Properties:
      SubnetId: !Ref PrivateSubnet2
      RouteTableId: !Ref PrivateRouteTable2
  NAT2:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Condition: DoAz2
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP2
        - AllocationId
      SubnetId: !Ref PublicSubnet2
  EIP2:
    Type: "AWS::EC2::EIP"
    Condition: DoAz2
    Properties:
      Domain: vpc
  Route2:
    Type: "AWS::EC2::Route"
    Condition: DoAz2
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable2
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT2
  PrivateSubnet3:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [5, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 2
      - Fn::GetAZs: !Ref "AWS::Region"
  PrivateRouteTable3:
    Type: "AWS::EC2::RouteTable"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
  PrivateSubnetRouteTableAssociation3:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Condition: DoAz3
    Properties:
      SubnetId: !Ref PrivateSubnet3
      RouteTableId: !Ref PrivateRouteTable3
  NAT3:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Condition: DoAz3
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP3
        - AllocationId
      SubnetId: !Ref PublicSubnet3
  EIP3:
    Type: "AWS::EC2::EIP"
    Condition: DoAz3
    Properties:
      Domain: vpc
  Route3:
    Type: "AWS::EC2::Route"
    Condition: DoAz3
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable3
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT3
  S3Endpoint:
    Type: AWS::EC2::VPCEndpoint
    Properties:
      PolicyDocument:
        Version: 2012-10-17
        Statement:
        - Effect: Allow
          Principal: '*'
          Action:
          - '*'
          Resource:
          - '*'
      RouteTableIds:
      - !Ref PublicRouteTable
      - !Ref PrivateRouteTable
      - !If [DoAz2, !Ref PrivateRouteTable2, !Ref "AWS::NoValue"]
      - !If [DoAz3, !Ref PrivateRouteTable3, !Ref "AWS::NoValue"]
      ServiceName: !Join
      - ''
      - - com.amazonaws.
        - !Ref 'AWS::Region'
        - .s3
      VpcId: !Ref VPC

Outputs:
  VpcId:
    Description: ID of the new VPC.
    Value: !Ref VPC
  PublicSubnetIds:
    Description: Subnet IDs of the public subnets.
    Value:
      !Join [
        ",",
        [!Ref PublicSubnet, !If [DoAz2, !Ref PublicSubnet2, !Ref "AWS::NoValue"], !If [DoAz3, !Ref PublicSubnet3, !Ref "AWS::NoValue"]]
      ]
  PrivateSubnetIds:
    Description: Subnet IDs of the private subnets.
    Value:
      !Join [
        ",",
        [!Ref PrivateSubnet, !If [DoAz2, !Ref PrivateSubnet2, !Ref "AWS::NoValue"], !If [DoAz3, !Ref PrivateSubnet3, !Ref "AWS::NoValue"]]
      ]
  PublicRouteTableId:
    Description: Public Route table ID
    Value: !Ref PublicRouteTable
  PrivateRouteTableIds:
    Description: Private Route table IDs
    Value:
      !Join [
        ",",
        [
          !Join ["=", [
            !Select [0, "Fn::GetAZs": !Ref "AWS::Region"],
            !Ref PrivateRouteTable
          ]],
          !If [DoAz2,
               !Join ["=", [!Select [1, "Fn::GetAZs": !Ref "AWS::Region"], !Ref PrivateRouteTable2]],
               !Ref "AWS::NoValue"
          ],
          !If [DoAz3,
               !Join ["=", [!Select [2, "Fn::GetAZs": !Ref "AWS::Region"], !Ref PrivateRouteTable3]],
               !Ref "AWS::NoValue"
          ]
        ]
      ]

3.12.7.3. Creating a VPC carrier gateway

To use public subnets in your OpenShift Container Platform cluster that runs on Wavelength Zones, you must create the carrier gateway and associate the carrier gateway to the VPC. Subnets are useful for deploying load balancers or edge compute nodes.

To create edge nodes or internet-facing load balancers in Wavelength Zones locations for your OpenShift Container Platform cluster, you must create the following required network components:

A carrier gateway that associates to the existing VPC.
A carrier route table that lists route entries.
A subnet that associates to the carrier route table.

Carrier gateways exist for VPCs that only contain subnets in a Wavelength Zone.

The following list explains the functions of a carrier gateway in the context of an AWS Wavelength Zones location:

Provides connectivity between your Wavelength Zone and the carrier network, which includes any available devices from the carrier network.
Performs Network Address Translation (NAT) functions, such as translating IP addresses that are public IP addresses stored in a network border group, from Wavelength Zones to carrier IP addresses. These translation functions apply to inbound and outbound traffic.
Authorizes inbound traffic from a carrier network that is located in a specific location.
Authorizes outbound traffic to a carrier network and the internet.

Note

No inbound connection configuration exists from the internet to a Wavelength Zone through the carrier gateway.

You can use the provided CloudFormation template to create a stack of the following AWS resources:

One carrier gateway that associates to the VPC ID in the template.
One public route table for the Wavelength Zone named as <ClusterName>-public-carrier.
Default IPv4 route entry in the new route table that targets the carrier gateway.
VPC gateway endpoint for an AWS Simple Storage Service (S3).

Note

If you do not use the provided CloudFormation template to create your AWS infrastructure, you must review the provided information and manually create the infrastructure. If your cluster does not initialize correctly, you might have to contact Red Hat support with your installation logs.

Prerequisites

You configured an AWS account.
You added your AWS keys and region to your local AWS profile by running aws configure.

Procedure

Go to the next section of the documentation named "CloudFormation template for the VPC Carrier Gateway", and then copy the syntax from the CloudFormation template for VPC Carrier Gateway template. Save the copied template syntax as a YAML file on your local system. This template describes the VPC that your cluster requires.
Run the following command to deploy the CloudFormation template, which creates a stack of AWS resources that represent the VPC:
```
$ aws cloudformation create-stack --stack-name <stack_name> \1
  --region ${CLUSTER_REGION} \
  --template-body file://<template>.yaml \2
  --parameters \//
    ParameterKey=VpcId,ParameterValue="${VpcId}" \3
    ParameterKey=ClusterName,ParameterValue="${ClusterName}" 4
```
1
<stack_name> is the name for the CloudFormation stack, such as clusterName-vpc-carrier-gw. You need the name of this stack if you remove the cluster.
2
<template> is the relative path and the name of the CloudFormation template YAML file that you saved.
3
<VpcId> is the VPC ID extracted from the CloudFormation stack output created in the section named "Creating a VPC in AWS".
4
<ClusterName> is a custom value that prefixes to resources that the CloudFormation stack creates. You can use the same name that is defined in the metadata.name section of the install-config.yaml configuration file.
Example output
```
arn:aws:cloudformation:us-east-1:123456789012:stack/<stack_name>/dbedae40-2fd3-11eb-820e-12a48460849f
```

Verification

Confirm that the CloudFormation template components exist by running the following command:
```
$ aws cloudformation describe-stacks --stack-name <stack_name>
```
After the StackStatus displays CREATE_COMPLETE, the output displays values for the following parameter. Ensure that you provide the parameter value to the other CloudFormation templates that you run to create for your cluster.

PublicRouteTableId

The ID of the Route Table in the Carrier infrastructure.

Additional resources

See Amazon S3 in the AWS documentation.

3.12.7.4. CloudFormation template for the VPC Carrier Gateway

You can use the following CloudFormation template to deploy the Carrier Gateway on AWS Wavelength infrastructure.

Example 3.36. CloudFormation template for VPC Carrier Gateway

AWSTemplateFormatVersion: 2010-09-09
Description: Template for Creating Wavelength Zone Gateway (Carrier Gateway).

Parameters:
  VpcId:
    Description: VPC ID to associate the Carrier Gateway.
    Type: String
    AllowedPattern: ^(?:(?:vpc)(?:-[a-zA-Z0-9]+)?\b|(?:[0-9]{1,3}\.){3}[0-9]{1,3})$
    ConstraintDescription: VPC ID must be with valid name, starting with vpc-.*.
  ClusterName:
    Description: Cluster Name or Prefix name to prepend the tag Name for each subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: ClusterName parameter must be specified.

Resources:
  CarrierGateway:
    Type: "AWS::EC2::CarrierGateway"
    Properties:
      VpcId: !Ref VpcId
      Tags:
      - Key: Name
        Value: !Join ['-', [!Ref ClusterName, "cagw"]]

  PublicRouteTable:
    Type: "AWS::EC2::RouteTable"
    Properties:
      VpcId: !Ref VpcId
      Tags:
      - Key: Name
        Value: !Join ['-', [!Ref ClusterName, "public-carrier"]]

  PublicRoute:
    Type: "AWS::EC2::Route"
    DependsOn: CarrierGateway
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      CarrierGatewayId: !Ref CarrierGateway

  S3Endpoint:
    Type: AWS::EC2::VPCEndpoint
    Properties:
      PolicyDocument:
        Version: 2012-10-17
        Statement:
        - Effect: Allow
          Principal: '*'
          Action:
          - '*'
          Resource:
          - '*'
      RouteTableIds:
      - !Ref PublicRouteTable
      ServiceName: !Join
      - ''
      - - com.amazonaws.
        - !Ref 'AWS::Region'
        - .s3
      VpcId: !Ref VpcId

Outputs:
  PublicRouteTableId:
    Description: Public Route table ID
    Value: !Ref PublicRouteTable

3.12.7.5. Creating subnets in Wavelength Zones

Before you configure a machine set for edge compute nodes in your OpenShift Container Platform cluster, you must create the subnets in Wavelength Zones. Complete the following procedure for each Wavelength Zone that you want to deploy compute nodes to.

You can use the provided CloudFormation template and create a CloudFormation stack. You can then use this stack to custom provision a subnet.

Note

If you do not use the provided CloudFormation template to create your AWS infrastructure, you must review the provided information and manually create the infrastructure. If your cluster does not initialize correctly, you might have to contact Red Hat support with your installation logs.

Prerequisites

You configured an AWS account.
You added your AWS keys and region to your local AWS profile by running aws configure.
You opted in to the Wavelength Zones group.

Procedure

Go to the section of the documentation named "CloudFormation template for the VPC subnet", and copy the syntax from the template. Save the copied template syntax as a YAML file on your local system. This template describes the VPC that your cluster requires.
Run the following command to deploy the CloudFormation template, which creates a stack of AWS resources that represent the VPC:
```
$ aws cloudformation create-stack --stack-name <stack_name> \ 1
  --region ${CLUSTER_REGION} \
  --template-body file://<template>.yaml \ 2
  --parameters \
    ParameterKey=VpcId,ParameterValue="${VPC_ID}" \ 3
    ParameterKey=ClusterName,ParameterValue="${CLUSTER_NAME}" \ 4
    ParameterKey=ZoneName,ParameterValue="${ZONE_NAME}" \ 5
    ParameterKey=PublicRouteTableId,ParameterValue="${ROUTE_TABLE_PUB}" \ 6
    ParameterKey=PublicSubnetCidr,ParameterValue="${SUBNET_CIDR_PUB}" \ 7
    ParameterKey=PrivateRouteTableId,ParameterValue="${ROUTE_TABLE_PVT}" \ 8
    ParameterKey=PrivateSubnetCidr,ParameterValue="${SUBNET_CIDR_PVT}" 9
```
1
<stack_name> is the name for the CloudFormation stack, such as cluster-wl-<wavelength_zone_shortname>. You need the name of this stack if you remove the cluster.
2
<template> is the relative path and the name of the CloudFormation template YAML file that you saved.
3
${VPC_ID} is the VPC ID, which is the value VpcID in the output of the CloudFormation template for the VPC.
4
${ZONE_NAME} is the value of Wavelength Zones name to create the subnets.
5
${CLUSTER_NAME} is the value of ClusterName to be used as a prefix of the new AWS resource names.
6
${ROUTE_TABLE_PUB} is the PublicRouteTableId extracted from the output of the VPC’s carrier gateway CloudFormation stack.
7
${SUBNET_CIDR_PUB} is a valid CIDR block that is used to create the public subnet. This block must be part of the VPC CIDR block VpcCidr.
8
${ROUTE_TABLE_PVT} is the PrivateRouteTableId extracted from the output of the VPC’s CloudFormation stack.
9
${SUBNET_CIDR_PVT} is a valid CIDR block that is used to create the private subnet. This block must be part of the VPC CIDR block VpcCidr.

Example output

arn:aws:cloudformation:us-east-1:123456789012:stack/<stack_name>/dbedae40-820e-11eb-2fd3-12a48460849f

Verification

Confirm that the template components exist by running the following command:

$ aws cloudformation describe-stacks --stack-name <stack_name>

After the StackStatus displays CREATE_COMPLETE, the output displays values for the following parameters. Ensure that you provide these parameter values to the other CloudFormation templates that you run to create for your cluster.

`PublicSubnetId`	The IDs of the public subnet created by the CloudFormation stack.
`PrivateSubnetId`	The IDs of the private subnet created by the CloudFormation stack.

3.12.7.6. CloudFormation template for the VPC subnet

You can use the following CloudFormation template to deploy the private and public subnets in a zone on Wavelength Zones infrastructure.

Example 3.37. CloudFormation template for VPC subnets

AWSTemplateFormatVersion: 2010-09-09
Description: Template for Best Practice Subnets (Public and Private)

Parameters:
  VpcId:
    Description: VPC ID that comprises all the target subnets.
    Type: String
    AllowedPattern: ^(?:(?:vpc)(?:-[a-zA-Z0-9]+)?\b|(?:[0-9]{1,3}\.){3}[0-9]{1,3})$
    ConstraintDescription: VPC ID must be with valid name, starting with vpc-.*.
  ClusterName:
    Description: Cluster name or prefix name to prepend the Name tag for each subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: ClusterName parameter must be specified.
  ZoneName:
    Description: Zone Name to create the subnets, such as us-west-2-lax-1a.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: ZoneName parameter must be specified.
  PublicRouteTableId:
    Description: Public Route Table ID to associate the public subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: PublicRouteTableId parameter must be specified.
  PublicSubnetCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.128.0/20
    Description: CIDR block for public subnet.
    Type: String
  PrivateRouteTableId:
    Description: Private Route Table ID to associate the private subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: PrivateRouteTableId parameter must be specified.
  PrivateSubnetCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.128.0/20
    Description: CIDR block for private subnet.
    Type: String


Resources:
  PublicSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VpcId
      CidrBlock: !Ref PublicSubnetCidr
      AvailabilityZone: !Ref ZoneName
      Tags:
      - Key: Name
        Value: !Join ['-', [!Ref ClusterName, "public", !Ref ZoneName]]

  PublicSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet
      RouteTableId: !Ref PublicRouteTableId

  PrivateSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VpcId
      CidrBlock: !Ref PrivateSubnetCidr
      AvailabilityZone: !Ref ZoneName
      Tags:
      - Key: Name
        Value: !Join ['-', [!Ref ClusterName, "private", !Ref ZoneName]]

  PrivateSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PrivateSubnet
      RouteTableId: !Ref PrivateRouteTableId

Outputs:
  PublicSubnetId:
    Description: Subnet ID of the public subnets.
    Value:
      !Join ["", [!Ref PublicSubnet]]

  PrivateSubnetId:
    Description: Subnet ID of the private subnets.
    Value:
      !Join ["", [!Ref PrivateSubnet]]

3.12.7.7. Modifying an installation configuration file to use AWS Wavelength Zones subnets

Modify your install-config.yaml file to include Wavelength Zones subnets.

Prerequisites

You created subnets by using the procedure "Creating subnets in Wavelength Zones".
You created an install-config.yaml file by using the procedure "Creating the installation configuration file".

Procedure

Modify the install-config.yaml configuration file by specifying Wavelength Zones subnets in the platform.aws.subnets parameter.
Example installation configuration file with Wavelength Zones subnets
```
# ...
platform:
  aws:
    region: us-west-2
    subnets: 1
    - publicSubnetId-1
    - publicSubnetId-2
    - publicSubnetId-3
    - privateSubnetId-1
    - privateSubnetId-2
    - privateSubnetId-3
    - publicOrPrivateSubnetID-Wavelength-1
# ...
```
1
List of subnet IDs created in the zones: Availability and Wavelength Zones.

Additional resources

For more information about viewing the CloudFormation stacks that you created, see AWS CloudFormation console.
For more information about AWS profile and credential configuration, see Configuration and credential file settings in the AWS documentation.

Next steps

Deploying the cluster

3.12.8. Optional: Assign public IP addresses to edge compute nodes

If your workload requires deploying the edge compute nodes in public subnets on Wavelength Zones infrastructure, you can configure the machine set manifests when installing a cluster.

AWS Wavelength Zones infrastructure accesses the network traffic in a specified zone, so applications can take advantage of lower latency when serving end users that are closer to that zone.

The default setting that deploys compute nodes in private subnets might not meet your needs, so consider creating edge compute nodes in public subnets when you want to apply more customization to your infrastructure.

Important

By default, OpenShift Container Platform deploy the compute nodes in private subnets. For best performance, consider placing compute nodes in subnets that have their Public IP addresses attached to the subnets.

You must create additional security groups, but ensure that you only open the groups' rules over the internet when you really need to.

Procedure

Change to the directory that contains the installation program and generate the manifest files. Ensure that the installation manifests get created at the openshift and manifests directory level.
```
$ ./openshift-install create manifests --dir <installation_directory>
```

Edit the machine set manifest that the installation program generates for the Wavelength Zones, so that the manifest gets deployed in public subnets. Specify true for the spec.template.spec.providerSpec.value.publicIP parameter.

Example machine set manifest configuration for installing a cluster quickly in Wavelength Zones

spec:
  template:
    spec:
      providerSpec:
        value:
          publicIp: true
          subnet:
            filters:
              - name: tag:Name
                values:
                  - ${INFRA_ID}-public-${ZONE_NAME}

Example machine set manifest configuration for installing a cluster in an existing VPC that has Wavelength Zones subnets

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  name: <infrastructure_id>-edge-<zone>
  namespace: openshift-machine-api
spec:
  template:
    spec:
      providerSpec:
        value:
          publicIp: true

3.12.9. Deploying the cluster

You can install OpenShift Container Platform on a compatible cloud platform.

Important

You can run the create cluster command of the installation program only once, during initial installation.

Prerequisites

You have configured an account with the cloud platform that hosts your cluster.
You have the OpenShift Container Platform installation program and the pull secret for your cluster.
You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

Change to the directory that contains the installation program and initialize the cluster deployment:
```
$ ./openshift-install create cluster --dir <installation_directory> \ 1
    --log-level=info 2
```
1
For <installation_directory>, specify the location of your customized ./install-config.yaml file.
2
To view different installation details, specify warn, debug, or error instead of info.
Optional: Remove or disable the AdministratorAccess policy from the IAM account that you used to install the cluster.
Note
The elevated permissions provided by the AdministratorAccess policy are required only during installation.

Verification

When the cluster deployment completes successfully:

The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.
Credential information also outputs to <installation_directory>/.openshift_install.log.

Important

Do not delete the installation program or the files that the installation program creates. Both are required to delete the cluster.

Example output

...
INFO Install complete!
INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
INFO Login to the console with user: "kubeadmin", and password: "password"
INFO Time elapsed: 36m22s

Important

The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.
It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

3.12.10. Verifying the status of the deployed cluster

Verify that your OpenShift Container Platform successfully deployed on AWS Wavelength Zones.

3.12.10.1. Logging in to the cluster by using the CLI

You can log in to your cluster as a default system user by exporting the cluster kubeconfig file. The kubeconfig file contains information about the cluster that is used by the CLI to connect a client to the correct cluster and API server. The file is specific to a cluster and is created during OpenShift Container Platform installation.

Prerequisites

You deployed an OpenShift Container Platform cluster.
You installed the oc CLI.

Procedure

Export the kubeadmin credentials:
```
$ export KUBECONFIG=<installation_directory>/auth/kubeconfig 1
```
1
For <installation_directory>, specify the path to the directory that you stored the installation files in.
Verify you can run oc commands successfully using the exported configuration:
```
$ oc whoami
```
Example output
```
system:admin
```

3.12.10.2. Logging in to the cluster by using the web console

The kubeadmin user exists by default after an OpenShift Container Platform installation. You can log in to your cluster as the kubeadmin user by using the OpenShift Container Platform web console.

Prerequisites

You have access to the installation host.
You completed a cluster installation and all cluster Operators are available.

Procedure

Obtain the password for the kubeadmin user from the kubeadmin-password file on the installation host:
```
$ cat <installation_directory>/auth/kubeadmin-password
```
Note
Alternatively, you can obtain the kubeadmin password from the <installation_directory>/.openshift_install.log log file on the installation host.
List the OpenShift Container Platform web console route:
```
$ oc get routes -n openshift-console | grep 'console-openshift'
```
Note
Alternatively, you can obtain the OpenShift Container Platform route from the <installation_directory>/.openshift_install.log log file on the installation host.
Example output
```
console     console-openshift-console.apps.<cluster_name>.<base_domain>            console     https   reencrypt/Redirect   None
```
Navigate to the route detailed in the output of the preceding command in a web browser and log in as the kubeadmin user.

Additional resources

Accessing the web console

3.12.10.3. Verifying nodes that were created with edge compute pool

After you install a cluster that uses AWS Wavelength Zones infrastructure, check the status of the machine that was created by the machine set manifests created during installation.

To check the machine sets created from the subnet you added to the install-config.yaml file, run the following command:

$ oc get machineset -n openshift-machine-api

Example output

NAME                                         DESIRED   CURRENT   READY   AVAILABLE   AGE
cluster-7xw5g-edge-us-east-1-wl1-nyc-wlz-1   1         1         1       1           3h4m
cluster-7xw5g-worker-us-east-1a              1         1         1       1           3h4m
cluster-7xw5g-worker-us-east-1b              1         1         1       1           3h4m
cluster-7xw5g-worker-us-east-1c              1         1         1       1           3h4m

To check the machines that were created from the machine sets, run the following command:

$ oc get machines -n openshift-machine-api

Example output

NAME                                        PHASE     TYPE          REGION      ZONE               AGE
cluster-7xw5g-edge-us-east-1-wl1-nyc-wlz-1-wbclh  Running   c5d.2xlarge   us-east-1   us-east-1-wl1-nyc-wlz-1  3h
cluster-7xw5g-master-0                            Running   m6i.xlarge    us-east-1   us-east-1a               3h4m
cluster-7xw5g-master-1                            Running   m6i.xlarge    us-east-1   us-east-1b               3h4m
cluster-7xw5g-master-2                            Running   m6i.xlarge    us-east-1   us-east-1c               3h4m
cluster-7xw5g-worker-us-east-1a-rtp45             Running   m6i.xlarge    us-east-1   us-east-1a               3h
cluster-7xw5g-worker-us-east-1b-glm7c             Running   m6i.xlarge    us-east-1   us-east-1b               3h
cluster-7xw5g-worker-us-east-1c-qfvz4             Running   m6i.xlarge    us-east-1   us-east-1c               3h

To check nodes with edge roles, run the following command:

$ oc get nodes -l node-role.kubernetes.io/edge

Example output

NAME                           STATUS   ROLES         AGE    VERSION
ip-10-0-207-188.ec2.internal   Ready    edge,worker   172m   v1.25.2+d2e245f

Next steps

Validating an installation.
If necessary, you can opt out of remote health.

3.13. Extending an AWS VPC cluster into an AWS Outpost

In OpenShift Container Platform version 4.14, you could install a cluster on Amazon Web Services (AWS) with compute nodes running in AWS Outposts as a Technology Preview. As of OpenShift Container Platform version 4.15, this installation method is no longer supported. Instead, you can install a cluster on AWS into an existing VPC, and provision compute nodes on AWS Outposts as a postinstallation configuration task.

After installing a cluster on Amazon Web Services (AWS) into an existing Amazon Virtual Private Cloud (VPC), you can create a compute machine set that deploys compute machines in AWS Outposts. AWS Outposts is an AWS edge compute service that enables using many features of a cloud-based AWS deployment with the reduced latency of an on-premise environment. For more information, see the AWS Outposts documentation.

3.13.1. AWS Outposts on OpenShift Container Platform requirements and limitations

You can manage the resources on your AWS Outpost similarly to those on a cloud-based AWS cluster if you configure your OpenShift Container Platform cluster to accommodate the following requirements and limitations:

To extend an OpenShift Container Platform cluster on AWS into an Outpost, you must have installed the cluster into an existing Amazon Virtual Private Cloud (VPC).
The infrastructure of an Outpost is tied to an availability zone in an AWS region and uses a dedicated subnet. Edge compute machines deployed into an Outpost must use the Outpost subnet and the availability zone that the Outpost is tied to.
When the AWS Kubernetes cloud controller manager discovers an Outpost subnet, it attempts to create service load balancers in the Outpost subnet. AWS Outposts do not support running service load balancers. To prevent the cloud controller manager from creating unsupported services in the Outpost subnet, you must include the kubernetes.io/cluster/unmanaged tag in the Outpost subnet configuration. This requirement is a workaround in OpenShift Container Platform version 4.17. For more information, see OCPBUGS-30041.
OpenShift Container Platform clusters on AWS include the gp3-csi and gp2-csi storage classes. These classes correspond to Amazon Elastic Block Store (EBS) gp3 and gp2 volumes. OpenShift Container Platform clusters use the gp3-csi storage class by default, but AWS Outposts does not support EBS gp3 volumes.
This implementation uses the node-role.kubernetes.io/outposts taint to prevent spreading regular cluster workloads to the Outpost nodes. To schedule user workloads in the Outpost, you must specify a corresponding toleration in the Deployment resource for your application. Reserving the AWS Outpost infrastructure for user workloads avoids additional configuration requirements, such as updating the default CSI to gp2-csi so that it is compatible.
To create a volume in the Outpost, the CSI driver requires the Outpost Amazon Resource Name (ARN). The driver uses the topology keys stored on the CSINode objects to determine the Outpost ARN. To ensure that the driver uses the correct topology values, you must set the volume binding mode to WaitForConsumer and avoid setting allowed topologies on any new storage classes that you create.
When you extend an AWS VPC cluster into an Outpost, you have two types of compute resources. The Outpost has edge compute nodes, while the VPC has cloud-based compute nodes. The cloud-based AWS Elastic Block volume cannot attach to Outpost edge compute nodes, and the Outpost volumes cannot attach to cloud-based compute nodes.
As a result, you cannot use CSI snapshots to migrate applications that use persistent storage from cloud-based compute nodes to edge compute nodes or directly use the original persistent volume. To migrate persistent storage data for applications, you must perform a manual backup and restore operation.
AWS Outposts does not support AWS Network Load Balancers or AWS Classic Load Balancers. You must use AWS Application Load Balancers to enable load balancing for edge compute resources in the AWS Outposts environment.
To provision an Application Load Balancer, you must use an Ingress resource and install the AWS Load Balancer Operator. If your cluster contains both edge and cloud-based compute instances that share workloads, additional configuration is required.
For more information, see "Using the AWS Load Balancer Operator in an AWS VPC cluster extended into an Outpost".

Additional resources

Using the AWS Load Balancer Operator in an AWS VPC cluster extended into an Outpost

3.13.2. Obtaining information about your environment

To extend an AWS VPC cluster to your Outpost, you must provide information about your OpenShift Container Platform cluster and your Outpost environment. You use this information to complete network configuration tasks and configure a compute machine set that creates compute machines in your Outpost. You can use command-line tools to gather the required details.

3.13.2.1. Obtaining information from your OpenShift Container Platform cluster

You can use the OpenShift CLI (oc) to obtain information from your OpenShift Container Platform cluster.

Tip

You might find it convenient to store some or all of these values as environment variables by using the export command.

Prerequisites

You have installed an OpenShift Container Platform cluster into a custom VPC on AWS.
You have access to the cluster using an account with cluster-admin permissions.
You have installed the OpenShift CLI (oc).

Procedure

List the infrastructure ID for the cluster by running the following command. Retain this value.

$ oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructures.config.openshift.io cluster

Obtain details about the compute machine sets that the installation program created by running the following commands:

List the compute machine sets on your cluster:

$ oc get machinesets.machine.openshift.io -n openshift-machine-api

Example output

NAME                           DESIRED   CURRENT   READY   AVAILABLE   AGE
<compute_machine_set_name_1>   1         1         1       1           55m
<compute_machine_set_name_2>   1         1         1       1           55m

Display the Amazon Machine Image (AMI) ID for one of the listed compute machine sets. Retain this value.

$ oc get machinesets.machine.openshift.io <compute_machine_set_name_1> \
  -n openshift-machine-api \
  -o jsonpath='{.spec.template.spec.providerSpec.value.ami.id}'

Display the subnet ID for the AWS VPC cluster. Retain this value.

$ oc get machinesets.machine.openshift.io <compute_machine_set_name_1> \
  -n openshift-machine-api \
  -o jsonpath='{.spec.template.spec.providerSpec.value.subnet.id}'

3.13.2.2. Obtaining information from your AWS account

You can use the AWS CLI (aws) to obtain information from your AWS account.

Tip

You might find it convenient to store some or all of these values as environment variables by using the export command.

Prerequisites

You have an AWS Outposts site with the required hardware setup complete.
Your Outpost is connected to your AWS account.
You have access to your AWS account by using the AWS CLI (aws) as a user with permissions to perform the required tasks.

Procedure

List the Outposts that are connected to your AWS account by running the following command:
```
$ aws outposts list-outposts
```
Retain the following values from the output of the aws outposts list-outposts command:
- The Outpost ID.
- The Amazon Resource Name (ARN) for the Outpost.
- The Outpost availability zone.
  Note
  The output of the aws outposts list-outposts command includes two values related to the availability zone: AvailabilityZone and AvailabilityZoneId. You use the AvailablilityZone value to configure a compute machine set that creates compute machines in your Outpost.
Using the value of the Outpost ID, show the instance types that are available in your Outpost by running the following command. Retain the values of the available instance types.
```
$ aws outposts get-outpost-instance-types \
  --outpost-id <outpost_id_value>
```
Using the value of the Outpost ARN, show the subnet ID for the Outpost by running the following command. Retain this value.
```
$ aws ec2 describe-subnets \
  --filters Name=outpost-arn,Values=<outpost_arn_value>
```

3.13.3. Configuring your network for your Outpost

To extend your VPC cluster into an Outpost, you must complete the following network configuration tasks:

Change the Cluster Network MTU.
Create a subnet in your Outpost.

3.13.3.1. Changing the cluster network MTU to support AWS Outposts

During installation, the maximum transmission unit (MTU) for the cluster network is detected automatically based on the MTU of the primary network interface of nodes in the cluster. You might need to decrease the MTU value for the cluster network to support an AWS Outposts subnet.

Important

The migration is disruptive and nodes in your cluster might be temporarily unavailable as the MTU update takes effect.

For more details about the migration process, including important service interruption considerations, see "Changing the MTU for the cluster network" in the additional resources for this procedure.

Prerequisites

You have installed the OpenShift CLI (oc).
You have access to the cluster using an account with cluster-admin permissions.
You have identified the target MTU for your cluster. The MTU for the OVN-Kubernetes network plugin must be set to 100 less than the lowest hardware MTU value in your cluster.

Procedure

To obtain the current MTU for the cluster network, enter the following command:

$ oc describe network.config cluster

Example output

...
Status:
  Cluster Network:
    Cidr:               10.217.0.0/22
    Host Prefix:        23
  Cluster Network MTU:  1400
  Network Type:         OVNKubernetes
  Service Network:
    10.217.4.0/23
...

To begin the MTU migration, specify the migration configuration by entering the following command. The Machine Config Operator performs a rolling reboot of the nodes in the cluster in preparation for the MTU change.
```
$ oc patch Network.operator.openshift.io cluster --type=merge --patch \
  '{"spec": { "migration": { "mtu": { "network": { "from": <overlay_from>, "to": <overlay_to> } , "machine": { "to" : <machine_to> } } } } }'
```
where:
<overlay_from>
Specifies the current cluster network MTU value.
<overlay_to>
Specifies the target MTU for the cluster network. This value is set relative to the value of <machine_to>. For OVN-Kubernetes, this value must be 100 less than the value of <machine_to>.
<machine_to>
Specifies the MTU for the primary network interface on the underlying host network.
Example that decreases the cluster MTU
```
$ oc patch Network.operator.openshift.io cluster --type=merge --patch \
  '{"spec": { "migration": { "mtu": { "network": { "from": 1400, "to": 1000 } , "machine": { "to" : 1100} } } } }'
```
As the Machine Config Operator updates machines in each machine config pool, it reboots each node one by one. You must wait until all the nodes are updated. Check the machine config pool status by entering the following command:
```
$ oc get machineconfigpools
```
A successfully updated node has the following status: UPDATED=true, UPDATING=false, DEGRADED=false.
Note
By default, the Machine Config Operator updates one machine per pool at a time, causing the total time the migration takes to increase with the size of the cluster.
Confirm the status of the new machine configuration on the hosts:
1. To list the machine configuration state and the name of the applied machine configuration, enter the following command:
```
$ oc describe node | egrep "hostname|machineconfig"
```
  Example output
```
kubernetes.io/hostname=master-0
machineconfiguration.openshift.io/currentConfig: rendered-master-c53e221d9d24e1c8bb6ee89dd3d8ad7b
machineconfiguration.openshift.io/desiredConfig: rendered-master-c53e221d9d24e1c8bb6ee89dd3d8ad7b
machineconfiguration.openshift.io/reason:
machineconfiguration.openshift.io/state: Done
```
2. Verify that the following statements are true:
  - The value of machineconfiguration.openshift.io/state field is Done.
  - The value of the machineconfiguration.openshift.io/currentConfig field is equal to the value of the machineconfiguration.openshift.io/desiredConfig field.
3. To confirm that the machine config is correct, enter the following command:
```
$ oc get machineconfig <config_name> -o yaml | grep ExecStart
```
  where <config_name> is the name of the machine config from the machineconfiguration.openshift.io/currentConfig field.
  The machine config must include the following update to the systemd configuration:
```
ExecStart=/usr/local/bin/mtu-migration.sh
```
To finalize the MTU migration, enter the following command for the OVN-Kubernetes network plugin:
```
$ oc patch Network.operator.openshift.io cluster --type=merge --patch \
  '{"spec": { "migration": null, "defaultNetwork":{ "ovnKubernetesConfig": { "mtu": <mtu> }}}}'
```
where:
<mtu>
Specifies the new cluster network MTU that you specified with <overlay_to>.
After finalizing the MTU migration, each machine config pool node is rebooted one by one. You must wait until all the nodes are updated. Check the machine config pool status by entering the following command:
```
$ oc get machineconfigpools
```
A successfully updated node has the following status: UPDATED=true, UPDATING=false, DEGRADED=false.

Verification

Verify that the node in your cluster uses the MTU that you specified by entering the following command:
```
$ oc describe network.config cluster
```

Additional resources

Changing the MTU for the cluster network

3.13.3.2. Creating subnets for AWS edge compute services

Before you configure a machine set for edge compute nodes in your OpenShift Container Platform cluster, you must create a subnet in AWS Outposts.

You can use the provided CloudFormation template and create a CloudFormation stack. You can then use this stack to custom provision a subnet.

Note

If you do not use the provided CloudFormation template to create your AWS infrastructure, you must review the provided information and manually create the infrastructure. If your cluster does not initialize correctly, you might have to contact Red Hat support with your installation logs.

Prerequisites

You configured an AWS account.
You added your AWS keys and region to your local AWS profile by running aws configure.
You have obtained the required information about your environment from your OpenShift Container Platform cluster, Outpost, and AWS account.

Procedure

Go to the section of the documentation named "CloudFormation template for the VPC subnet", and copy the syntax from the template. Save the copied template syntax as a YAML file on your local system. This template describes the VPC that your cluster requires.
Run the following command to deploy the CloudFormation template, which creates a stack of AWS resources that represent the VPC:
```
$ aws cloudformation create-stack --stack-name <stack_name> \1
  --region ${CLUSTER_REGION} \
  --template-body file://<template>.yaml \2
  --parameters \
    ParameterKey=VpcId,ParameterValue="${VPC_ID}" \3
    ParameterKey=ClusterName,ParameterValue="${CLUSTER_NAME}" \4
    ParameterKey=ZoneName,ParameterValue="${ZONE_NAME}" \5
    ParameterKey=PublicRouteTableId,ParameterValue="${ROUTE_TABLE_PUB}" \6
    ParameterKey=PublicSubnetCidr,ParameterValue="${SUBNET_CIDR_PUB}" \7
    ParameterKey=PrivateRouteTableId,ParameterValue="${ROUTE_TABLE_PVT}" \8
    ParameterKey=PrivateSubnetCidr,ParameterValue="${SUBNET_CIDR_PVT}" \9
    ParameterKey=PrivateSubnetLabel,ParameterValue="private-outpost" \
    ParameterKey=PublicSubnetLabel,ParameterValue="public-outpost" \
    ParameterKey=OutpostArn,ParameterValue="${OUTPOST_ARN}" 10
```
1
<stack_name> is the name for the CloudFormation stack, such as cluster-<outpost_name>.
2
<template> is the relative path and the name of the CloudFormation template YAML file that you saved.
3
${VPC_ID} is the VPC ID, which is the value VpcID in the output of the CloudFormation template for the VPC.
4
${CLUSTER_NAME} is the value of ClusterName to be used as a prefix of the new AWS resource names.
5
${ZONE_NAME} is the value of AWS Outposts name to create the subnets.
6
${ROUTE_TABLE_PUB} is the Public Route Table ID created in the ${VPC_ID} used to associate the public subnets on Outposts. Specify the public route table to associate the Outpost subnet created by this stack.
7
${SUBNET_CIDR_PUB} is a valid CIDR block that is used to create the public subnet. This block must be part of the VPC CIDR block VpcCidr.
8
${ROUTE_TABLE_PVT} is the Private Route Table ID created in the ${VPC_ID} used to associate the private subnets on Outposts. Specify the private route table to associate the Outpost subnet created by this stack.
9
${SUBNET_CIDR_PVT} is a valid CIDR block that is used to create the private subnet. This block must be part of the VPC CIDR block VpcCidr.
10
${OUTPOST_ARN} is the Amazon Resource Name (ARN) for the Outpost.
Example output
```
arn:aws:cloudformation:us-east-1:123456789012:stack/<stack_name>/dbedae40-820e-11eb-2fd3-12a48460849f
```

Verification

Confirm that the template components exist by running the following command:

$ aws cloudformation describe-stacks --stack-name <stack_name>

After the StackStatus displays CREATE_COMPLETE, the output displays values for the following parameters:

`PublicSubnetId`	The IDs of the public subnet created by the CloudFormation stack.
`PrivateSubnetId`	The IDs of the private subnet created by the CloudFormation stack.

Ensure that you provide these parameter values to the other CloudFormation templates that you run to create for your cluster.

3.13.3.3. CloudFormation template for the VPC subnet

You can use the following CloudFormation template to deploy the Outpost subnet.

Example 3.38. CloudFormation template for VPC subnets

AWSTemplateFormatVersion: 2010-09-09
Description: Template for Best Practice Subnets (Public and Private)

Parameters:
  VpcId:
    Description: VPC ID that comprises all the target subnets.
    Type: String
    AllowedPattern: ^(?:(?:vpc)(?:-[a-zA-Z0-9]+)?\b|(?:[0-9]{1,3}\.){3}[0-9]{1,3})$
    ConstraintDescription: VPC ID must be with valid name, starting with vpc-.*.
  ClusterName:
    Description: Cluster name or prefix name to prepend the Name tag for each subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: ClusterName parameter must be specified.
  ZoneName:
    Description: Zone Name to create the subnets, such as us-west-2-lax-1a.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: ZoneName parameter must be specified.
  PublicRouteTableId:
    Description: Public Route Table ID to associate the public subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: PublicRouteTableId parameter must be specified.
  PublicSubnetCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.128.0/20
    Description: CIDR block for public subnet.
    Type: String
  PrivateRouteTableId:
    Description: Private Route Table ID to associate the private subnet.
    Type: String
    AllowedPattern: ".+"
    ConstraintDescription: PrivateRouteTableId parameter must be specified.
  PrivateSubnetCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.128.0/20
    Description: CIDR block for private subnet.
    Type: String
  PrivateSubnetLabel:
    Default: "private"
    Description: Subnet label to be added when building the subnet name.
    Type: String
  PublicSubnetLabel:
    Default: "public"
    Description: Subnet label to be added when building the subnet name.
    Type: String
  OutpostArn:
    Default: ""
    Description: OutpostArn when creating subnets on AWS Outpost.
    Type: String

Conditions:
  OutpostEnabled: !Not [!Equals [!Ref "OutpostArn", ""]]

Resources:
  PublicSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VpcId
      CidrBlock: !Ref PublicSubnetCidr
      AvailabilityZone: !Ref ZoneName
      OutpostArn: !If [ OutpostEnabled, !Ref OutpostArn, !Ref "AWS::NoValue"]
      Tags:
      - Key: Name
        Value: !Join ['-', [ !Ref ClusterName, !Ref PublicSubnetLabel, !Ref ZoneName]]
      - Key: kubernetes.io/cluster/unmanaged 1
        Value: true

  PublicSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet
      RouteTableId: !Ref PublicRouteTableId

  PrivateSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VpcId
      CidrBlock: !Ref PrivateSubnetCidr
      AvailabilityZone: !Ref ZoneName
      OutpostArn: !If [ OutpostEnabled, !Ref OutpostArn, !Ref "AWS::NoValue"]
      Tags:
      - Key: Name
        Value: !Join ['-', [!Ref ClusterName, !Ref PrivateSubnetLabel, !Ref ZoneName]]
      - Key: kubernetes.io/cluster/unmanaged 2
        Value: true

  PrivateSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PrivateSubnet
      RouteTableId: !Ref PrivateRouteTableId

Outputs:
  PublicSubnetId:
    Description: Subnet ID of the public subnets.
    Value:
      !Join ["", [!Ref PublicSubnet]]

  PrivateSubnetId:
    Description: Subnet ID of the private subnets.
    Value:
      !Join ["", [!Ref PrivateSubnet]]

1: You must include the kubernetes.io/cluster/unmanaged tag in the public subnet configuration for AWS Outposts.
2: You must include the kubernetes.io/cluster/unmanaged tag in the private subnet configuration for AWS Outposts.

3.13.4. Creating a compute machine set that deploys edge compute machines on an Outpost

To create edge compute machines on AWS Outposts, you must create a new compute machine set with a compatible configuration.

Prerequisites

You have an AWS Outposts site.
You have installed an OpenShift Container Platform cluster into a custom VPC on AWS.
You have access to the cluster using an account with cluster-admin permissions.
You have installed the OpenShift CLI (oc).

Procedure

List the compute machine sets in your cluster by running the following command:

$ oc get machinesets.machine.openshift.io -n openshift-machine-api

Example output

NAME                            DESIRED   CURRENT   READY   AVAILABLE   AGE
<original_machine_set_name_1>   1         1         1       1           55m
<original_machine_set_name_2>   1         1         1       1           55m

Record the names of the existing compute machine sets.

Create a YAML file that contains the values for a new compute machine set custom resource (CR) by using one of the following methods:

Copy an existing compute machine set configuration into a new file by running the following command:
```
$ oc get machinesets.machine.openshift.io <original_machine_set_name_1> \
  -n openshift-machine-api -o yaml > <new_machine_set_name_1>.yaml
```
You can edit this YAML file with your preferred text editor.

Create an empty YAML file named <new_machine_set_name_1>.yaml with your preferred text editor and include the required values for your new compute machine set.

If you are not sure which value to set for a specific field, you can view values of an existing compute machine set CR by running the following command:

$ oc get machinesets.machine.openshift.io <original_machine_set_name_1> \
  -n openshift-machine-api -o yaml

Example output

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructure_id> 1
  name: <infrastructure_id>-<role>-<availability_zone> 2
  namespace: openshift-machine-api
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructure_id>
      machine.openshift.io/cluster-api-machineset: <infrastructure_id>-<role>-<availability_zone>
  template:
    metadata:
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructure_id>
        machine.openshift.io/cluster-api-machine-role: <role>
        machine.openshift.io/cluster-api-machine-type: <role>
        machine.openshift.io/cluster-api-machineset: <infrastructure_id>-<role>-<availability_zone>
    spec:
      providerSpec: 3
# ...

1: The cluster infrastructure ID.
2: A default node label. For AWS Outposts, you use the outposts role.
3: The omitted providerSpec section includes values that must be configured for your Outpost.

Configure the new compute machine set to create edge compute machines in the Outpost by editing the <new_machine_set_name_1>.yaml file:

Example compute machine set for AWS Outposts

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructure_id> 1
  name: <infrastructure_id>-outposts-<availability_zone> 2
  namespace: openshift-machine-api
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructure_id>
      machine.openshift.io/cluster-api-machineset: <infrastructure_id>-outposts-<availability_zone>
  template:
    metadata:
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructure_id>
        machine.openshift.io/cluster-api-machine-role: outposts
        machine.openshift.io/cluster-api-machine-type: outposts
        machine.openshift.io/cluster-api-machineset: <infrastructure_id>-outposts-<availability_zone>
    spec:
      metadata:
        labels:
          node-role.kubernetes.io/outposts: ""
          location: outposts
      providerSpec:
        value:
          ami:
            id: <ami_id> 3
          apiVersion: machine.openshift.io/v1beta1
          blockDevices:
            - ebs:
                volumeSize: 120
                volumeType: gp2 4
          credentialsSecret:
            name: aws-cloud-credentials
          deviceIndex: 0
          iamInstanceProfile:
            id: <infrastructure_id>-worker-profile
          instanceType: m5.xlarge 5
          kind: AWSMachineProviderConfig
          placement:
            availabilityZone: <availability_zone>
            region: <region> 6
          securityGroups:
            - filters:
              - name: tag:Name
                values:
                  - <infrastructure_id>-worker-sg
          subnet:
            id: <subnet_id> 7
          tags:
            - name: kubernetes.io/cluster/<infrastructure_id>
              value: owned
          userDataSecret:
            name: worker-user-data
      taints: 8
        - key: node-role.kubernetes.io/outposts
          effect: NoSchedule

1: Specifies the cluster infrastructure ID.
2: Specifies the name of the compute machine set. The name is composed of the cluster infrastructure ID, the outposts role name, and the Outpost availability zone.
3: Specifies the Amazon Machine Image (AMI) ID.
4: Specifies the EBS volume type. AWS Outposts requires gp2 volumes.
5: Specifies the AWS instance type. You must use an instance type that is configured in your Outpost.
6: Specifies the AWS region in which the Outpost availability zone exists.
7: Specifies the dedicated subnet for your Outpost.
8: Specifies a taint to prevent workloads from being scheduled on nodes that have the node-role.kubernetes.io/outposts label. To schedule user workloads in the Outpost, you must specify a corresponding toleration in the Deployment resource for your application.

Save your changes.
Create a compute machine set CR by running the following command:
```
$ oc create -f <new_machine_set_name_1>.yaml
```

Verification

To verify that the compute machine set is created, list the compute machine sets in your cluster by running the following command:

$ oc get machinesets.machine.openshift.io -n openshift-machine-api

Example output

NAME                            DESIRED   CURRENT   READY   AVAILABLE   AGE
<new_machine_set_name_1>        1         1         1       1           4m12s
<original_machine_set_name_1>   1         1         1       1           55m
<original_machine_set_name_2>   1         1         1       1           55m

To list the machines that are managed by the new compute machine set, run the following command:

$ oc get -n openshift-machine-api machines.machine.openshift.io \
  -l machine.openshift.io/cluster-api-machineset=<new_machine_set_name_1>

Example output

NAME                             PHASE          TYPE        REGION      ZONE         AGE
<machine_from_new_1>             Provisioned    m5.xlarge   us-east-1   us-east-1a   25s
<machine_from_new_2>             Provisioning   m5.xlarge   us-east-1   us-east-1a   25s

To verify that a machine created by the new compute machine set has the correct configuration, examine the relevant fields in the CR for one of the new machines by running the following command:
```
$ oc describe machine <machine_from_new_1> -n openshift-machine-api
```

3.13.5. Creating user workloads in an Outpost

After you extend an OpenShift Container Platform in an AWS VPC cluster into an Outpost, you can use edge compute nodes with the label node-role.kubernetes.io/outposts to create user workloads in the Outpost.

Prerequisites

You have extended an AWS VPC cluster into an Outpost.
You have access to the cluster using an account with cluster-admin permissions.
You have installed the OpenShift CLI (oc).
You have created a compute machine set that deploys edge compute machines compatible with the Outpost environment.

Procedure

Configure a Deployment resource file for an application that you want to deploy to the edge compute node in the edge subnet.

Example Deployment manifest

kind: Namespace
apiVersion: v1
metadata:
  name: <application_name> 1
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: <application_name>
  namespace: <application_namespace> 2
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: gp2-csi 3
  volumeMode: Filesystem
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: <application_name>
  namespace: <application_namespace>
spec:
  selector:
    matchLabels:
      app: <application_name>
  replicas: 1
  template:
    metadata:
      labels:
        app: <application_name>
        location: outposts 4
    spec:
      securityContext:
        seccompProfile:
          type: RuntimeDefault
      nodeSelector: 5
        node-role.kubernetes.io/outpost: ''
      tolerations: 6
      - key: "node-role.kubernetes.io/outposts"
        operator: "Equal"
        value: ""
        effect: "NoSchedule"
      containers:
        - image: openshift/origin-node
          command:
           - "/bin/socat"
          args:
            - TCP4-LISTEN:8080,reuseaddr,fork
            - EXEC:'/bin/bash -c \"printf \\\"HTTP/1.0 200 OK\r\n\r\n\\\"; sed -e \\\"/^\r/q\\\"\"'
          imagePullPolicy: Always
          name: <application_name>
          ports:
            - containerPort: 8080
          volumeMounts:
            - mountPath: "/mnt/storage"
              name: data
      volumes:
      - name: data
        persistentVolumeClaim:
          claimName: <application_name>

1: Specify a name for your application.
2: Specify a namespace for your application. The application namespace can be the same as the application name.
3: Specify the storage class name. For an edge compute configuration, you must use the gp2-csi storage class.
4: Specify a label to identify workloads deployed in the Outpost.
5: Specify the node selector label that targets edge compute nodes.
6: Specify tolerations that match the key and effects taints in the compute machine set for your edge compute machines. Set the value and operator tolerations as shown.

Create the Deployment resource by running the following command:
```
$ oc create -f <application_deployment>.yaml
```

Configure a Service object that exposes a pod from a targeted edge compute node to services that run inside your edge network.

Example Service manifest

apiVersion: v1
kind: Service 1
metadata:
  name:  <application_name>
  namespace: <application_namespace>
spec:
  ports:
    - port: 80
      targetPort: 8080
      protocol: TCP
  type: NodePort
  selector: 2
    app: <application_name>

1: Defines the service resource.
2: Specify the label type to apply to managed pods.

Create the Service CR by running the following command:
```
$ oc create -f <application_service>.yaml
```

3.13.6. Scheduling workloads on edge and cloud-based AWS compute resources

When you extend an AWS VPC cluster into an Outpost, the Outpost uses edge compute nodes and the VPC uses cloud-based compute nodes. The following load balancer considerations apply to an AWS VPC cluster extended into an Outpost:

Outposts cannot run AWS Network Load Balancers or AWS Classic Load Balancers, but a Classic Load Balancer for a VPC cluster extended into an Outpost can attach to the Outpost edge compute nodes. For more information, see Using AWS Classic Load Balancers in an AWS VPC cluster extended into an Outpost.
To run a load balancer on an Outpost instance, you must use an AWS Application Load Balancer. You can use the AWS Load Balancer Operator to deploy an instance of the AWS Load Balancer Controller. The controller provisions AWS Application Load Balancers for Kubernetes Ingress resources. For more information, see Using the AWS Load Balancer Operator in an AWS VPC cluster extended into an Outpost.

3.13.6.1. Using AWS Classic Load Balancers in an AWS VPC cluster extended into an Outpost

AWS Outposts infrastructure cannot run AWS Classic Load Balancers, but Classic Load Balancers in the AWS VPC cluster can target edge compute nodes in the Outpost if edge and cloud-based subnets are in the same availability zone. As a result, Classic Load Balancers on the VPC cluster might schedule pods on either of these node types.

Scheduling the workloads on edge compute nodes and cloud-based compute nodes can introduce latency. If you want to prevent a Classic Load Balancer in the VPC cluster from targeting Outpost edge compute nodes, you can apply labels to the cloud-based compute nodes and configure the Classic Load Balancer to only schedule on nodes with the applied labels.

Note

If you do not need to prevent a Classic Load Balancer in the VPC cluster from targeting Outpost edge compute nodes, you do not need to complete these steps.

Prerequisites

You have extended an AWS VPC cluster into an Outpost.
You have access to the cluster using an account with cluster-admin permissions.
You have installed the OpenShift CLI (oc).
You have created a user workload in the Outpost with tolerations that match the taints for your edge compute machines.

Procedure

Optional: Verify that the edge compute nodes have the location=outposts label by running the following command and verifying that the output includes only the edge compute nodes in your Outpost:
```
$ oc get nodes -l location=outposts
```

Label the cloud-based compute nodes in the VPC cluster with a key-value pair by running the following command:

$ for NODE in $(oc get node -l node-role.kubernetes.io/worker --no-headers | grep -v outposts | awk '{print$1}'); do oc label node $NODE <key_name>=<value>; done

where <key_name>=<value> is the label you want to use to distinguish cloud-based compute nodes.

Example output

node1.example.com labeled
node2.example.com labeled
node3.example.com labeled

Optional: Verify that the cloud-based compute nodes have the specified label by running the following command and confirming that the output includes all cloud-based compute nodes in your VPC cluster:

$ oc get nodes -l <key_name>=<value>

Example output

NAME                   STATUS    ROLES     AGE       VERSION
node1.example.com      Ready     worker    7h        v1.30.3
node2.example.com      Ready     worker    7h        v1.30.3
node3.example.com      Ready     worker    7h        v1.30.3

Configure the Classic Load Balancer service by adding the cloud-based subnet information to the annotations field of the Service manifest:

Example service configuration

apiVersion: v1
kind: Service
metadata:
  labels:
    app: <application_name>
  name: <application_name>
  namespace: <application_namespace>
  annotations:
    service.beta.kubernetes.io/aws-load-balancer-subnets: <aws_subnet> 1
    service.beta.kubernetes.io/aws-load-balancer-target-node-labels: <key_name>=<value> 2
spec:
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    app: <application_name>
  type: LoadBalancer

1: Specify the subnet ID for the AWS VPC cluster.
2: Specify the key-value pair that matches the pair in the node label.

Create the Service CR by running the following command:
```
$ oc create -f <file_name>.yaml
```

Verification

Verify the status of the service resource to show the host of the provisioned Classic Load Balancer by running the following command:

$ HOST=$(oc get service <application_name> -n <application_namespace> --template='{{(index .status.loadBalancer.ingress 0).hostname}}')

Verify the status of the provisioned Classic Load Balancer host by running the following command:
```
$ curl $HOST
```
In the AWS console, verify that only the labeled instances appear as the targeted instances for the load balancer.

3.13.6.2. Using the AWS Load Balancer Operator in an AWS VPC cluster extended into an Outpost

You can configure the AWS Load Balancer Operator to provision an AWS Application Load Balancer in an AWS VPC cluster extended into an Outpost. AWS Outposts does not support AWS Network Load Balancers. As a result, the AWS Load Balancer Operator cannot provision Network Load Balancers in an Outpost.

You can create an AWS Application Load Balancer either in the cloud subnet or in the Outpost subnet. An Application Load Balancer in the cloud can attach to cloud-based compute nodes and an Application Load Balancer in the Outpost can attach to edge compute nodes. You must annotate Ingress resources with the Outpost subnet or the VPC subnet, but not both.

Prerequisites

You have extended an AWS VPC cluster into an Outpost.
You have installed the OpenShift CLI (oc).
You have installed the AWS Load Balancer Operator and created the AWS Load Balancer Controller.

Procedure

Configure the Ingress resource to use a specified subnet:

Example Ingress resource configuration

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: <application_name>
  annotations:
    alb.ingress.kubernetes.io/subnets: <subnet_id> 1
spec:
  ingressClassName: alb
  rules:
    - http:
        paths:
          - path: /
            pathType: Exact
            backend:
              service:
                name: <application_name>
                port:
                  number: 80

1

Specifies the subnet to use.

To use the Application Load Balancer in an Outpost, specify the Outpost subnet ID.
To use the Application Load Balancer in the cloud, you must specify at least two subnets in different availability zones.

Additional resources

Creating an instance of the AWS Load Balancer Controller

3.13.7. Additional resources

Installing a cluster on AWS into an existing VPC

3.14. Installing a cluster with the support for configuring multi-architecture compute machines

An OpenShift Container Platform cluster with multi-architecture compute machines supports compute machines with different architectures.

Note

When you have nodes with multiple architectures in your cluster, the architecture of your image must be consistent with the architecture of the node. You must ensure that the pod is assigned to the node with the appropriate architecture and that it matches the image architecture. For more information on assigning pods to nodes, Scheduling workloads on clusters with multi-architecture compute machines.

You can install an Amazon Web Services (AWS) cluster with the support for configuring multi-architecture compute machines. After installing the cluster, you can add multi-architecture compute machines to the cluster in the following ways:

Adding 64-bit x86 compute machines to a cluster that uses 64-bit ARM control plane machines and already includes 64-bit ARM compute machines. In this case, 64-bit x86 is considered the secondary architecture.
Adding 64-bit ARM compute machines to a cluster that uses 64-bit x86 control plane machines and already includes 64-bit x86 compute machines. In this case, 64-bit ARM is considered the secondary architecture.

Note

Before adding a secondary architecture node to your cluster, it is recommended to install the Multiarch Tuning Operator, and deploy a ClusterPodPlacementConfig custom resource. For more information, see "Managing workloads on multi-architecture clusters by using the Multiarch Tuning Operator".

3.14.1. Installing a cluster with multi-architecture support

You can install a cluster with the support for configuring multi-architecture compute machines.

Prerequisites

You installed the OpenShift CLI (oc).
You have the OpenShift Container Platform installation program.
You downloaded the pull secret for your cluster.

Procedure

Check that the openshift-install binary is using the multi payload by running the following command:
```
$ ./openshift-install version
```
Example output
```
./openshift-install 4.17.0
built from commit abc123etc
release image quay.io/openshift-release-dev/ocp-release@sha256:abc123wxyzetc
release architecture multi
default architecture amd64
```
The output must contain release architecture multi to indicate that the openshift-install binary is using the multi payload.
Update the install-config.yaml file to configure the architecture for the nodes.
Sample install-config.yaml file with multi-architecture configuration
```
apiVersion: v1
baseDomain: example.openshift.com
compute:
- architecture: amd64 1
  hyperthreading: Enabled
  name: worker
  platform: {}
  replicas: 3
controlPlane:
  architecture: arm64 2
  name: master
  platform: {}
  replicas: 3
# ...
```
1
Specify the architecture of the worker node. You can set this field to either arm64 or amd64.
2
Specify the control plane node architecture. You can set this field to either arm64 or amd64.

Next steps

Deploying the cluster

Additional resources

Managing workloads on multi-architecture clusters by using the Multiarch Tuning Operator