7.9. Installing a private cluster on Azure

7.9.1. Conditions préalables

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 Azure account to host the cluster and determined the tested and validated region to deploy the cluster to.
If you use a firewall, you configured it to allow the sites that your cluster requires access to.
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, you can manually create and maintain IAM credentials.
If you use customer-managed encryption keys, you prepared your Azure environment for encryption.

7.9.2. 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.

7.9.2.1. Private clusters in Azure

To create a private cluster on Microsoft Azure, you must provide an existing private VNet 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 only internal traffic.

Depending how your network connects to the private VNET, you might need to use a DNS forwarder to resolve the cluster’s private DNS records. The cluster’s machines use 168.63.129.16 internally for DNS resolution. For more information, see What is Azure Private DNS? and What is IP address 168.63.129.16? in the Azure documentation.

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

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

A BaseDomainResourceGroup, since the cluster does not create public records
Public IP addresses
Public DNS records

Public endpoints

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.

7.9.2.1.1. Limitations

Private clusters on Azure are subject to only the limitations that are associated with the use of an existing VNet.

7.9.2.2. User-defined outbound routing

In OpenShift Container Platform, you can choose your own outbound routing for a cluster to connect to the internet. This allows you to skip the creation of public IP addresses and the public load balancer.

You can configure user-defined routing by modifying parameters in the install-config.yaml file before installing your cluster. A pre-existing VNet is required to use outbound routing when installing a cluster; the installation program is not responsible for configuring this.

When configuring a cluster to use user-defined routing, the installation program does not create the following resources:

Outbound rules for access to the internet.
Public IPs for the public load balancer.
Kubernetes Service object to add the cluster machines to the public load balancer for outbound requests.

You must ensure the following items are available before setting user-defined routing:

Egress to the internet is possible to pull container images, unless using an OpenShift image registry mirror.
The cluster can access Azure APIs.
Various allowlist endpoints are configured. You can reference these endpoints in the Configuring your firewall section.

There are several pre-existing networking setups that are supported for internet access using user-defined routing.

Private cluster with network address translation

You can use Azure VNET network address translation (NAT) to provide outbound internet access for the subnets in your cluster. You can reference Create a NAT gateway using Azure CLI in the Azure documentation for configuration instructions.

When using a VNet setup with Azure NAT and user-defined routing configured, you can create a private cluster with no public endpoints.

Private cluster with Azure Firewall

You can use Azure Firewall to provide outbound routing for the VNet used to install the cluster. You can learn more about providing user-defined routing with Azure Firewall in the Azure documentation.

When using a VNet setup with Azure Firewall and user-defined routing configured, you can create a private cluster with no public endpoints.

Private cluster with a proxy configuration

You can use a proxy with user-defined routing to allow egress to the internet. You must ensure that cluster Operators do not access Azure APIs using a proxy; Operators must have access to Azure APIs outside of the proxy.

When using the default route table for subnets, with 0.0.0.0/0 populated automatically by Azure, all Azure API requests are routed over Azure’s internal network even though the IP addresses are public. As long as the Network Security Group rules allow egress to Azure API endpoints, proxies with user-defined routing configured allow you to create private clusters with no public endpoints.

Private cluster with no internet access

You can install a private network that restricts all access to the internet, except the Azure API. This is accomplished by mirroring the release image registry locally. Your cluster must have access to the following:

An OpenShift image registry mirror that allows for pulling container images
Access to Azure APIs

With these requirements available, you can use user-defined routing to create private clusters with no public endpoints.

7.9.3. About reusing a VNet for your OpenShift Container Platform cluster

In OpenShift Container Platform 4.12, you can deploy a cluster into an existing Azure Virtual Network (VNet) in Microsoft Azure. If you do, you must also use existing subnets within the VNet and routing rules.

By deploying OpenShift Container Platform into an existing Azure VNet, you might be able to avoid service limit constraints in new accounts or more easily abide by the operational constraints that your company’s guidelines set. This is a good option to use if you cannot obtain the infrastructure creation permissions that are required to create the VNet.

7.9.3.1. Requirements for using your VNet

When you deploy a cluster by using an existing VNet, you must perform additional network configuration before you install the cluster. In installer-provisioned infrastructure clusters, the installer usually creates the following components, but it does not create them when you install into an existing VNet:

Subnets
Route tables
VNets
Network Security Groups

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 VNet, you must correctly configure it and its subnets for the installation program and the cluster to use. The installation program cannot subdivide network ranges for the cluster to use, set route tables for the subnets, or set VNet options like DHCP, so you must do so before you install the cluster.

The cluster must be able to access the resource group that contains the existing VNet and subnets. While all of the resources that the cluster creates are placed in a separate resource group that it creates, some network resources are used from a separate group. Some cluster Operators must be able to access resources in both resource groups. For example, the Machine API controller attaches NICS for the virtual machines that it creates to subnets from the networking resource group.

Your VNet must meet the following characteristics:

The VNet’s CIDR block must contain the Networking.MachineCIDR range, which is the IP address pool for cluster machines.
The VNet and its subnets must belong to the same resource group, and the subnets must be configured to use Azure-assigned DHCP IP addresses instead of static IP addresses.

You must provide two subnets within your VNet, one for the control plane machines and one for the compute machines. Because Azure distributes machines in different availability zones within the region that you specify, your cluster will have high availability by default.

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

All the specified subnets exist.
There are two private subnets, one for the control plane machines and one for the compute machines.
The subnet CIDRs belong to the machine CIDR that you specified. Machines are not provisioned in availability zones that you do not provide private subnets for.

Note

If you destroy a cluster that uses an existing VNet, the VNet is not deleted.

7.9.3.1.1. Network security group requirements

The network security groups for the subnets that host the compute and control plane machines require specific access to ensure that the cluster communication is correct. You must create rules to allow access to the required cluster communication ports.

Important

The network security group rules must be in place before you install the cluster. If you attempt to install a cluster without the required access, the installation program cannot reach the Azure APIs, and installation fails.

Tableau 7.24. Required ports
Port	Description	Control plane	Compute
`80`	Allows HTTP traffic		x
`443`	Allows HTTPS traffic		x
`6443`	Allows communication to the control plane machines	x
`22623`	Allows internal communication to the machine config server for provisioning machines	x

Important

Currently, there is no supported way to block or restrict the machine config server endpoint. The machine config server must be exposed to the network so that newly-provisioned machines, which have no existing configuration or state, are able to fetch their configuration. In this model, the root of trust is the certificate signing requests (CSR) endpoint, which is where the kubelet sends its certificate signing request for approval to join the cluster. Because of this, machine configs should not be used to distribute sensitive information, such as secrets and certificates.

To ensure that the machine config server endpoints, ports 22623 and 22624, are secured in bare metal scenarios, customers must configure proper network policies.

Because cluster components do not modify the user-provided network security groups, which the Kubernetes controllers update, a pseudo-network security group is created for the Kubernetes controller to modify without impacting the rest of the environment.

Ressources complémentaires

About the OpenShift SDN network plugin

7.9.3.2. 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 resources in your clouds than others. For example, you might be able to create application-specific items, like instances, storage, and load balancers, but not networking-related components such as VNets, subnet, or ingress rules.

The Azure credentials that you use when you create your cluster do not need the networking permissions that are required to make VNets and core networking components within the VNet, 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 load balancers, security groups, storage accounts, and nodes.

7.9.3.3. Isolation between clusters

Because the cluster is unable to modify network security groups in an existing subnet, there is no way to isolate clusters from each other on the VNet.

7.9.4. Accès à l'internet pour OpenShift Container Platform

Dans OpenShift Container Platform 4.12, vous devez avoir accès à Internet pour installer votre cluster.

Vous devez disposer d'un accès à l'internet pour :

Accédez à OpenShift Cluster Manager Hybrid Cloud Console pour télécharger le programme d'installation et effectuer la gestion des abonnements. Si le cluster dispose d'un accès internet et que vous ne désactivez pas Telemetry, ce service donne automatiquement des droits à votre cluster.
Accédez à Quay.io pour obtenir les paquets nécessaires à l'installation de votre cluster.
Obtenir les paquets nécessaires pour effectuer les mises à jour de la grappe.

Important

Si votre cluster ne peut pas avoir d'accès direct à l'internet, vous pouvez effectuer une installation en réseau restreint sur certains types d'infrastructure que vous fournissez. Au cours de ce processus, vous téléchargez le contenu requis et l'utilisez pour remplir un registre miroir avec les paquets d'installation. Avec certains types d'installation, l'environnement dans lequel vous installez votre cluster ne nécessite pas d'accès à Internet. Avant de mettre à jour le cluster, vous mettez à jour le contenu du registre miroir.

7.9.5. 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.

Procédure

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 FIPS Validated / Modules in Process cryptographic libraries on the x86_64 architecture, 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)"
```
  Exemple de sortie
```
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
Exemple de sortie
```
Identity added: /home/<you>/<path>/<file_name> (<computer_name>)
```

Prochaines étapes

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

7.9.6. Obtaining the installation program

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

Conditions préalables

You have a computer that runs Linux or macOS, with 500 MB of local disk space.

Procédure

Access the Infrastructure Provider page on the OpenShift Cluster Manager site. If you have a Red Hat account, log in with your credentials. If you do not, create an account.
Select your infrastructure provider.
Navigate to the page for your installation type, download the installation program that corresponds with your host operating system and architecture, and place the file in the directory where you will 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 files are required to delete the cluster.
Important
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 the 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.

7.9.7. Manually creating the installation configuration file

When installing a private OpenShift Container Platform cluster, you must manually generate the installation configuration file.

Conditions préalables

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.

Procédure

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.
Note
For some platform types, you can alternatively run ./openshift-install create install-config --dir <installation_directory> to generate an install-config.yaml file. You can provide details about your cluster configuration at the prompts.
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.

7.9.7.1. Installation configuration parameters

Before you deploy an OpenShift Container Platform cluster, you provide parameter values to describe your account on the cloud platform that hosts your cluster and optionally customize your cluster’s platform. When you create the install-config.yaml installation configuration file, you provide values for the required parameters through the command line. If you customize your cluster, you can modify the install-config.yaml file to provide more details about the platform.

Note

After installation, you cannot modify these parameters in the install-config.yaml file.

7.9.7.1.1. Required configuration parameters

Required installation configuration parameters are described in the following table:

Tableau 7.25. Required parameters
Paramètres	Description	Valeurs
`apiVersion`	The API version for the `install-config.yaml` content. The current version is `v1`. The installation program may also support older API versions.	String
`baseDomain`	The base domain of your cloud provider. The base domain is used to create routes to your OpenShift Container Platform cluster components. The full DNS name for your cluster is a combination of the `baseDomain` and `metadata.name` parameter values that uses the `<metadata.name>.<baseDomain>` format.	A fully-qualified domain or subdomain name, such as `example.com`.
`metadata`	Kubernetes resource `ObjectMeta`, from which only the `name` parameter is consumed.	Objet
`metadata.name`	The name of the cluster. DNS records for the cluster are all subdomains of `{{.metadata.name}}.{{.baseDomain}}`.	String of lowercase letters, hyphens (`-`), and periods (`.`), such as `dev`.
`platform`	The configuration for the specific platform upon which to perform the installation: `alibabacloud`, `aws`, `baremetal`, `azure`, `gcp`, `ibmcloud`, `nutanix`, `openstack`, `ovirt`, `vsphere`, or `{}`. For additional information about `platform.<platform>` parameters, consult the table for your specific platform that follows.	Objet
`pullSecret`	Get a pull secret from the Red Hat OpenShift Cluster Manager to authenticate downloading container images for OpenShift Container Platform components from services such as Quay.io.	{ "auths":{ "cloud.openshift.com":{ "auth":"b3Blb=", "email":"you@example.com" }, "quay.io":{ "auth":"b3Blb=", "email":"you@example.com" } } }

7.9.7.1.2. Network configuration parameters

You can customize your installation configuration based on the requirements of your existing network infrastructure. For example, you can expand the IP address block for the cluster network or provide different IP address blocks than the defaults.

Only IPv4 addresses are supported.

Note

Globalnet is not supported with Red Hat OpenShift Data Foundation disaster recovery solutions. For regional disaster recovery scenarios, ensure that you use a nonoverlapping range of private IP addresses for the cluster and service networks in each cluster.

Tableau 7.26. Network parameters
Paramètres	Description	Valeurs
`networking`	The configuration for the cluster network.	Objet Note You cannot modify parameters specified by the `networking` object after installation.
`networking.networkType`	The Red Hat OpenShift Networking network plugin to install.	Either `OpenShiftSDN` or `OVNKubernetes`. `OpenShiftSDN` is a CNI plugin for all-Linux networks. `OVNKubernetes` is a CNI plugin for Linux networks and hybrid networks that contain both Linux and Windows servers. The default value is `OVNKubernetes`.
`networking.clusterNetwork`	The IP address blocks for pods. The default value is `10.128.0.0/14` with a host prefix of `/23`. If you specify multiple IP address blocks, the blocks must not overlap.	An array of objects. For example: networking: clusterNetwork: - cidr: 10.128.0.0/14 hostPrefix: 23
`networking.clusterNetwork.cidr`	Required if you use `networking.clusterNetwork`. An IP address block. An IPv4 network.	An IP address block in Classless Inter-Domain Routing (CIDR) notation. The prefix length for an IPv4 block is between `0` and `32`.
`networking.clusterNetwork.hostPrefix`	The subnet prefix length to assign to each individual node. For example, if `hostPrefix` is set to `23` then each node is assigned a `/23` subnet out of the given `cidr`. A `hostPrefix` value of `23` provides 510 (2^(32 - 23) - 2) pod IP addresses.	A subnet prefix. The default value is `23`.
`networking.serviceNetwork`	The IP address block for services. The default value is `172.30.0.0/16`. The OpenShift SDN and OVN-Kubernetes network plugins support only a single IP address block for the service network.	An array with an IP address block in CIDR format. For example: networking: serviceNetwork: - 172.30.0.0/16
`networking.machineNetwork`	The IP address blocks for machines. If you specify multiple IP address blocks, the blocks must not overlap.	An array of objects. For example: networking: machineNetwork: - cidr: 10.0.0.0/16
`networking.machineNetwork.cidr`	Required if you use `networking.machineNetwork`. An IP address block. The default value is `10.0.0.0/16` for all platforms other than libvirt. For libvirt, the default value is `192.168.126.0/24`.	An IP network block in CIDR notation. For example, `10.0.0.0/16`. Note Set the `networking.machineNetwork` to match the CIDR that the preferred NIC resides in.

7.9.7.1.3. Optional configuration parameters

Optional installation configuration parameters are described in the following table:

Tableau 7.27. Optional parameters
Paramètres	Description	Valeurs
`additionalTrustBundle`	A PEM-encoded X.509 certificate bundle that is added to the nodes' trusted certificate store. This trust bundle may also be used when a proxy has been configured.	String
`capabilities`	Controls the installation of optional core cluster components. You can reduce the footprint of your OpenShift Container Platform cluster by disabling optional components. For more information, see the "Cluster capabilities" page in Installing.	String array
`capabilities.baselineCapabilitySet`	Selects an initial set of optional capabilities to enable. Valid values are `None`, `v4.11`, `v4.12` and `vCurrent`. The default value is `vCurrent`.	String
`capabilities.additionalEnabledCapabilities`	Extends the set of optional capabilities beyond what you specify in `baselineCapabilitySet`. You may specify multiple capabilities in this parameter.	String array
`compute`	The configuration for the machines that comprise the compute nodes.	Array of `MachinePool` objects.
`compute.architecture`	Determines the instruction set architecture of the machines in the pool. Currently, clusters with varied architectures are not supported. All pools must specify the same architecture. Valid values are `amd64` and `arm64`. See Supported installation methods for different platforms in Installing documentation for information about instance availability.	String
`compute.hyperthreading`	Whether to enable or disable simultaneous multithreading, or `hyperthreading`, on compute machines. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. Important If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance.	`Enabled` or `Disabled`
`compute.name`	Required if you use `compute`. The name of the machine pool.	`worker`
`compute.platform`	Required if you use `compute`. Use this parameter to specify the cloud provider to host the worker machines. This parameter value must match the `controlPlane.platform` parameter value.	`alibabacloud`, `aws`, `azure`, `gcp`, `ibmcloud`, `nutanix`, `openstack`, `ovirt`, `vsphere`, or `{}`
`compute.replicas`	The number of compute machines, which are also known as worker machines, to provision.	A positive integer greater than or equal to `2`. The default value is `3`.
`featureSet`	Enables the cluster for a feature set. A feature set is a collection of OpenShift Container Platform features that are not enabled by default. For more information about enabling a feature set during installation, see "Enabling features using feature gates".	String. The name of the feature set to enable, such as `TechPreviewNoUpgrade`.
`controlPlane`	The configuration for the machines that comprise the control plane.	Array of `MachinePool` objects.
`controlPlane.architecture`	Determines the instruction set architecture of the machines in the pool. Currently, clusters with varied architectures are not supported. All pools must specify the same architecture. Valid values are `amd64` and `arm64`. See Supported installation methods for different platforms in Installing documentation for information about instance availability.	String
`controlPlane.hyperthreading`	Whether to enable or disable simultaneous multithreading, or `hyperthreading`, on control plane machines. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores. Important If you disable simultaneous multithreading, ensure that your capacity planning accounts for the dramatically decreased machine performance.	`Enabled` or `Disabled`
`controlPlane.name`	Required if you use `controlPlane`. The name of the machine pool.	`master`
`controlPlane.platform`	Required if you use `controlPlane`. Use this parameter to specify the cloud provider that hosts the control plane machines. This parameter value must match the `compute.platform` parameter value.	`alibabacloud`, `aws`, `azure`, `gcp`, `ibmcloud`, `nutanix`, `openstack`, `ovirt`, `vsphere`, or `{}`
`controlPlane.replicas`	The number of control plane machines to provision.	The only supported value is `3`, which is the default value.
`credentialsMode`	The Cloud Credential Operator (CCO) mode. If no mode is specified, the CCO dynamically tries to determine the capabilities of the provided credentials, with a preference for mint mode on the platforms where multiple modes are supported. Note Not all CCO modes are supported for all cloud providers. For more information about CCO modes, see the Cloud Credential Operator entry in the Cluster Operators reference content. Note If your AWS account has service control policies (SCP) enabled, you must configure the `credentialsMode` parameter to `Mint`, `Passthrough` or `Manual`.	`Mint`, `Passthrough`, `Manual` or an empty string (`""`).
`fips`	Enable or disable FIPS mode. The default is `false` (disabled). 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 The use of FIPS Validated / Modules in Process cryptographic libraries is only supported on OpenShift Container Platform deployments on the `x86_64` architecture. Note If you are using Azure File storage, you cannot enable FIPS mode.	`false` or `true`
`imageContentSources`	Sources and repositories for the release-image content.	Array of objects. Includes a `source` and, optionally, `mirrors`, as described in the following rows of this table.
`imageContentSources.source`	Required if you use `imageContentSources`. Specify the repository that users refer to, for example, in image pull specifications.	String
`imageContentSources.mirrors`	Specify one or more repositories that may also contain the same images.	Array of strings
`publish`	How to publish or expose the user-facing endpoints of your cluster, such as the Kubernetes API, OpenShift routes.	`Internal` or `External`. To deploy a private cluster, which cannot be accessed from the internet, set `publish` to `Internal`. The default value is `External`.
`sshKey`	The SSH key or keys to authenticate 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.	One or more keys. For example: sshKey: <key1> <key2> <key3>

7.9.7.1.4. Additional Azure configuration parameters

Additional Azure configuration parameters are described in the following table:

Tableau 7.28. Additional Azure parameters
Paramètres	Description	Valeurs
`compute.platform.azure.encryptionAtHost`	Enables host-level encryption for compute machines. You can enable this encryption alongside user-managed server-side encryption. This feature encrypts temporary, ephemeral, cached and un-managed disks on the VM host. This is not a prerequisite for user-managed server-side encryption.	`true` or `false`. The default is `false`.
`compute.platform.azure.osDisk.diskSizeGB`	The Azure disk size for the VM.	Integer that represents the size of the disk in GB. The default is `128`.
`compute.platform.azure.osDisk.diskType`	Defines the type of disk.	`standard_LRS`, `premium_LRS`, or `standardSSD_LRS`. The default is `premium_LRS`.
`compute.platform.azure.ultraSSDCapability`	Enables the use of Azure ultra disks for persistent storage on compute nodes. This requires that your Azure region and zone have ultra disks available.	`Enabled`, `Disabled`. The default is `Disabled`.
`compute.platform.azure.osDisk.diskEncryptionSet.resourceGroup`	The name of the Azure resource group that contains the disk encryption set from the installation prerequisites. This resource group should be different from the resource group where you install the cluster to avoid deleting your Azure encryption key when the cluster is destroyed. This value is only necessary if you intend to install the cluster with user-managed disk encryption.	String, for example `production_encryption_resource_group`.
`compute.platform.azure.osDisk.diskEncryptionSet.name`	The name of the disk encryption set that contains the encryption key from the installation prerequisites.	String, for example `production_disk_encryption_set`.
`compute.platform.azure.osDisk.diskEncryptionSet.subscriptionId`	Optional. The ID of a disk encryption set in another Azure subscription. This secondary disk encryption set will be used to encrypt compute machines. By default, the installation program will use the disk encryption set from the Azure subscription ID that you provided to the installation program prompts.	String, in the format `00000000-0000-0000-0000-000000000000`.
`controlPlane.platform.azure.encryptionAtHost`	Enables host-level encryption for control plane machines. You can enable this encryption alongside user-managed server-side encryption. This feature encrypts temporary, ephemeral, cached and un-managed disks on the VM host. This is not a prerequisite for user-managed server-side encryption.	`true` or `false`. The default is `false`.
`controlPlane.platform.azure.osDisk.diskEncryptionSet.resourceGroup`	The name of the Azure resource group that contains the disk encryption set from the installation prerequisites. This resource group should be different from the resource group where you install the cluster to avoid deleting your Azure encryption key when the cluster is destroyed. This value is only necessary if you intend to install the cluster with user-managed disk encryption.	String, for example `production_encryption_resource_group`.
`controlPlane.platform.azure.osDisk.diskEncryptionSet.name`	The name of the disk encryption set that contains the encryption key from the installation prerequisites.	String, for example `production_disk_encryption_set`.
`controlPlane.platform.azure.osDisk.diskEncryptionSet.subscriptionId`	Optional. The ID of a disk encryption set in another Azure subscription. This secondary disk encryption set will be used to encrypt control plane machines. By default, the installation program will use the disk encryption set from the Azure subscription ID that you provided to the installation program prompts.	String, in the format `00000000-0000-0000-0000-000000000000`.
`controlPlane.platform.azure.osDisk.diskSizeGB`	The Azure disk size for the VM.	Integer that represents the size of the disk in GB. The default is `1024`.
`controlPlane.platform.azure.osDisk.diskType`	Defines the type of disk.	`premium_LRS` or `standardSSD_LRS`. The default is `premium_LRS`.
`controlPlane.platform.azure.ultraSSDCapability`	Enables the use of Azure ultra disks for persistent storage on control plane machines. This requires that your Azure region and zone have ultra disks available.	`Enabled`, `Disabled`. The default is `Disabled`.
`platform.azure.baseDomainResourceGroupName`	The name of the resource group that contains the DNS zone for your base domain.	String, for example `production_cluster`.
`platform.azure.resourceGroupName`	The name of an already existing resource group to install your cluster to. This resource group must be empty and only used for this specific cluster; the cluster components assume ownership of all resources in the resource group. If you limit the service principal scope of the installation program to this resource group, you must ensure all other resources used by the installation program in your environment have the necessary permissions, such as the public DNS zone and virtual network. Destroying the cluster by using the installation program deletes this resource group.	String, for example `existing_resource_group`.
`platform.azure.outboundType`	The outbound routing strategy used to connect your cluster to the internet. If you are using user-defined routing, you must have pre-existing networking available where the outbound routing has already been configured prior to installing a cluster. The installation program is not responsible for configuring user-defined routing.	`LoadBalancer` or `UserDefinedRouting`. The default is `LoadBalancer`.
`platform.azure.region`	The name of the Azure region that hosts your cluster.	Any valid region name, such as `centralus`.
`platform.azure.zone`	List of availability zones to place machines in. For high availability, specify at least two zones.	List of zones, for example `["1", "2", "3"]`.
`platform.azure.defaultMachinePlatform.ultraSSDCapability`	Enables the use of Azure ultra disks for persistent storage on control plane and compute machines. This requires that your Azure region and zone have ultra disks available.	`Enabled`, `Disabled`. The default is `Disabled`.
`platform.azure.networkResourceGroupName`	The name of the resource group that contains the existing VNet that you want to deploy your cluster to. This name cannot be the same as the `platform.azure.baseDomainResourceGroupName`.	String.
`platform.azure.virtualNetwork`	The name of the existing VNet that you want to deploy your cluster to.	String.
`platform.azure.controlPlaneSubnet`	The name of the existing subnet in your VNet that you want to deploy your control plane machines to.	Valid CIDR, for example `10.0.0.0/16`.
`platform.azure.computeSubnet`	The name of the existing subnet in your VNet that you want to deploy your compute machines to.	Valid CIDR, for example `10.0.0.0/16`.
`platform.azure.cloudName`	The name of the Azure cloud environment that is used to configure the Azure SDK with the appropriate Azure API endpoints. If empty, the default value `AzurePublicCloud` is used.	Any valid cloud environment, such as `AzurePublicCloud` or `AzureUSGovernmentCloud`.

Note

You cannot customize Azure Availability Zones or Use tags to organize your Azure resources with an Azure cluster.

7.9.7.2. Minimum resource requirements for cluster installation

Each cluster machine must meet the following minimum requirements:

Tableau 7.29. Minimum resource requirements
Machine	Operating System	vCPU ^[1]	Virtual RAM	Stockage	IOPS ^[2]
Bootstrap	RHCOS	4	16 GB	100 GB	300
Control plane	RHCOS	4	16 GB	100 GB	300
Compute	RHCOS, RHEL 8.4, or RHEL 8.5 ^[3]	2	8 GB	100 GB	300

One vCPU is equivalent to one physical core when simultaneous multithreading (SMT), or hyperthreading, 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.

Important

You are required to use Azure virtual machines with premiumIO set to true. The machines must also have the hyperVGeneration property contain V1.

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

7.9.7.3. Tested instance types for Azure

The following Microsoft Azure instance types have been tested with OpenShift Container Platform.

Exemple 7.28. Machine types

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

7.9.7.4. Tested instance types for Azure ARM

The following Microsoft Azure instance types have been tested with OpenShift Container Platform.

Exemple 7.29. Machine types

c6g.*
m6g.*

7.9.7.5. Sample customized install-config.yaml file for Azure

You can customize the install-config.yaml file 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
controlPlane: 2
  hyperthreading: Enabled 3 4
  name: master
  platform:
    azure:
      encryptionAtHost: true
      ultraSSDCapability: Enabled
      osDisk:
        diskSizeGB: 1024 5
        diskType: Premium_LRS
        diskEncryptionSet:
          resourceGroup: disk_encryption_set_resource_group
          name: disk_encryption_set_name
          subscriptionId: secondary_subscription_id
      type: Standard_D8s_v3
  replicas: 3
compute: 6
- hyperthreading: Enabled 7
  name: worker
  platform:
    azure:
      ultraSSDCapability: Enabled
      type: Standard_D2s_v3
      encryptionAtHost: true
      osDisk:
        diskSizeGB: 512 8
        diskType: Standard_LRS
        diskEncryptionSet:
          resourceGroup: disk_encryption_set_resource_group
          name: disk_encryption_set_name
          subscriptionId: secondary_subscription_id
      zones: 9
      - "1"
      - "2"
      - "3"
  replicas: 5
metadata:
  name: test-cluster 10
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes 11
  serviceNetwork:
  - 172.30.0.0/16
platform:
  azure:
    defaultMachinePlatform:
      ultraSSDCapability: Enabled
    baseDomainResourceGroupName: resource_group 12
    region: centralus 13
    resourceGroupName: existing_resource_group 14
    networkResourceGroupName: vnet_resource_group 15
    virtualNetwork: vnet 16
    controlPlaneSubnet: control_plane_subnet 17
    computeSubnet: compute_subnet 18
    outboundType: UserDefinedRouting 19
    cloudName: AzurePublicCloud
pullSecret: '{"auths": ...}' 20
fips: false 21
sshKey: ssh-ed25519 AAAA... 22
publish: Internal 23

1 10 13 20: Required. The installation program prompts you for this value.
2 6: If you do not provide these parameters and values, the installation program provides the default value.
3 7: 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.
4: 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 virtual machine types, such as Standard_D8s_v3, for your machines if you disable simultaneous multithreading.
5 8: You can specify the size of the disk to use in GB. Minimum recommendation for control plane nodes is 1024 GB.
9: Specify a list of zones to deploy your machines to. For high availability, specify at least two zones.
11: The cluster network plugin to install. The supported values are OVNKubernetes and OpenShiftSDN. The default value is OVNKubernetes.
12: Specify the name of the resource group that contains the DNS zone for your base domain.
14: Specify the name of an already existing resource group to install your cluster to. If undefined, a new resource group is created for the cluster.
15: If you use an existing VNet, specify the name of the resource group that contains it.
16: If you use an existing VNet, specify its name.
17: If you use an existing VNet, specify the name of the subnet to host the control plane machines.
18: If you use an existing VNet, specify the name of the subnet to host the compute machines.
19: You can customize your own outbound routing. Configuring user-defined routing prevents exposing external endpoints in your cluster. User-defined routing for egress requires deploying your cluster to an existing VNet.
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
The use of FIPS Validated / Modules in Process cryptographic libraries is only supported on OpenShift Container Platform deployments on the x86_64 architecture.
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.

7.9.7.6. 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.

Conditions préalables

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).

Procédure

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: example.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.
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.

7.9.8. Enabling Accelerated Networking during installation

You can enable Accelerated Networking on Microsoft Azure by adding acceleratedNetworking to your compute machine set YAML file before you install the cluster.

Conditions préalables

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

Procédure

Change to the openshift directory within the directory that contains the installation program. The openshift directory contains the Kubernetes manifest files that define the worker machines. These are the three default compute machine set files for an Azure cluster:
Machine set files in openshift directory listing
```
99_openshift-cluster-api_worker-machineset-0.yaml
99_openshift-cluster-api_worker-machineset-1.yaml
99_openshift-cluster-api_worker-machineset-2.yaml
```
Add the following to the providerSpec field in each compute machine set file:
```
providerSpec:
  value:
    ...
    acceleratedNetworking: true 1
    ...
    vmSize: <azure-vm-size> 2
    ...
```
1
This line enables Accelerated Networking.
2
Specify an Azure VM size that includes at least four vCPUs. For information about VM sizes, see Microsoft Azure documentation.

Ressources complémentaires

For more details about Accelerated Networking, see Accelerated Networking for Microsoft Azure VMs.

7.9.9. 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.

Conditions préalables

Configurez un compte auprès de la plateforme cloud qui héberge votre cluster.
Obtain the OpenShift Container Platform installation program and the pull secret for your cluster.

Procédure

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.
Note
If the cloud provider account that you configured on your host does not have sufficient permissions to deploy the cluster, the installation process stops, and the missing permissions are displayed.

Vérification

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.

Exemple de sortie

...
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: "4vYBz-Ee6gm-ymBZj-Wt5AL"
INFO Time elapsed: 36m22s

Important

Les fichiers de configuration d'Ignition générés par le programme d'installation contiennent des certificats qui expirent après 24 heures et qui sont renouvelés à ce moment-là. Si le cluster est arrêté avant le renouvellement des certificats et qu'il est redémarré après l'expiration des 24 heures, le cluster récupère automatiquement les certificats expirés. L'exception est que vous devez approuver manuellement les demandes de signature de certificat (CSR) de node-bootstrapper en attente pour récupérer les certificats de kubelet. Pour plus d'informations, consultez la documentation relative à Recovering from expired control plane certificates.
Il est recommandé d'utiliser les fichiers de configuration Ignition dans les 12 heures suivant leur génération, car le certificat de 24 heures tourne entre 16 et 22 heures après l'installation du cluster. En utilisant les fichiers de configuration Ignition dans les 12 heures, vous pouvez éviter l'échec de l'installation si la mise à jour du certificat s'exécute pendant l'installation.

7.9.10. Finalizing user-managed encryption after installation

If you installed OpenShift Container Platform using a user-managed encryption key, you can complete the installation by creating a new storage class and granting write permissions to the Azure cluster resource group.

Procédure

Obtain the identity of the cluster resource group used by the installer:
1. If you specified an existing resource group in install-config.yaml, obtain its Azure identity by running the following command:
```
$ az identity list --resource-group "<existing_resource_group>"
```
2. If you did not specify a existing resource group in install-config.yaml, locate the resource group that the installer created, and then obtain its Azure identity by running the following commands:
```
$ az group list
```
```
$ az identity list --resource-group "<installer_created_resource_group>"
```
Grant a role assignment to the cluster resource group so that it can write to the Disk Encryption Set by running the following command:
```
$ az role assignment create --role "<privileged_role>" \1
    --assignee "<resource_group_identity>" 2
```
1
Specifies an Azure role that has read/write permissions to the disk encryption set. You can use the Owner role or a custom role with the necessary permissions.
2
Specifies the identity of the cluster resource group.
Obtain the id of the disk encryption set you created prior to installation by running the following command:
```
$ az disk-encryption-set show -n <disk_encryption_set_name> \1
     --resource-group <resource_group_name> 2
```
1
Specifies the name of the disk encryption set.
2
Specifies the resource group that contains the disk encryption set. The id is in the format of "/subscriptions/…/resourceGroups/…/providers/Microsoft.Compute/diskEncryptionSets/…".
Obtain the identity of the cluster service principal by running the following command:
```
$ az identity show -g <cluster_resource_group> \1
     -n <cluster_service_principal_name> \2
     --query principalId --out tsv
```
1
Specifies the name of the cluster resource group created by the installation program.
2
Specifies the name of the cluster service principal created by the installation program. The identity is in the format of 12345678-1234-1234-1234-1234567890.
Create a role assignment that grants the cluster service principal necessary privileges to the disk encryption set by running the following command:
```
$ az role assignment create --assignee <cluster_service_principal_id> \1
     --role <privileged_role> \2
     --scope <disk_encryption_set_id> \3
```
1
Specifies the ID of the cluster service principal obtained in the previous step.
2
Specifies the Azure role name. You can use the Contributor role or a custom role with the necessary permissions.
3
Specifies the ID of the disk encryption set.
Create a storage class that uses the user-managed disk encryption set:
1. Save the following storage class definition to a file, for example storage-class-definition.yaml:
```
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: managed-premium
provisioner: kubernetes.io/azure-disk
parameters:
  skuname: Premium_LRS
  kind: Managed
  diskEncryptionSetID: "<disk_encryption_set_ID>" 1
  resourceGroup: "<resource_group_name>" 2
reclaimPolicy: Delete
allowVolumeExpansion: true
volumeBindingMode: WaitForFirstConsumer
```
  1
  Specifies the ID of the disk encryption set that you created in the prerequisite steps, for example "/subscriptions/xxxxxx-xxxxx-xxxxx/resourceGroups/test-encryption/providers/Microsoft.Compute/diskEncryptionSets/disk-encryption-set-xxxxxx".
  2
  Specifies the name of the resource group used by the installer. This is the same resource group from the first step.
2. Create the storage class managed-premium from the file you created by running the following command:
```
$ oc create -f storage-class-definition.yaml
```
Select the managed-premium storage class when you create persistent volumes to use encrypted storage.

7.9.11. Installer le CLI OpenShift en téléchargeant le binaire

Vous pouvez installer l'OpenShift CLI (oc) pour interagir avec OpenShift Container Platform à partir d'une interface de ligne de commande. Vous pouvez installer oc sur Linux, Windows ou macOS.

Important

Si vous avez installé une version antérieure de oc, vous ne pouvez pas l'utiliser pour exécuter toutes les commandes dans OpenShift Container Platform 4.12. Téléchargez et installez la nouvelle version de oc.

Installation de la CLI OpenShift sur Linux

Vous pouvez installer le binaire OpenShift CLI (oc) sur Linux en utilisant la procédure suivante.

Procédure

Naviguez jusqu'à la page de téléchargements OpenShift Container Platform sur le portail client Red Hat.
Sélectionnez l'architecture dans la liste déroulante Product Variant.
Sélectionnez la version appropriée dans la liste déroulante Version.
Cliquez sur Download Now à côté de l'entrée OpenShift v4.12 Linux Client et enregistrez le fichier.
Décompressez l'archive :
```
tar xvf <file>
```
Placez le fichier binaire oc dans un répertoire situé sur votre site PATH.
Pour vérifier votre PATH, exécutez la commande suivante :
```
$ echo $PATH
```

Après l'installation de la CLI OpenShift, elle est disponible à l'aide de la commande oc:

oc <command>

Installation de la CLI OpenShift sur Windows

Vous pouvez installer le binaire OpenShift CLI (oc) sur Windows en utilisant la procédure suivante.

Procédure

Naviguez jusqu'à la page de téléchargements OpenShift Container Platform sur le portail client Red Hat.
Sélectionnez la version appropriée dans la liste déroulante Version.
Cliquez sur Download Now à côté de l'entrée OpenShift v4.12 Windows Client et enregistrez le fichier.
Décompressez l'archive à l'aide d'un programme ZIP.
Déplacez le fichier binaire oc dans un répertoire situé sur votre site PATH.
Pour vérifier votre PATH, ouvrez l'invite de commande et exécutez la commande suivante :
```
C:\N> path
```

Après l'installation de la CLI OpenShift, elle est disponible à l'aide de la commande oc:

C:\N> oc <command>

Installation de la CLI OpenShift sur macOS

Vous pouvez installer le binaire OpenShift CLI (oc) sur macOS en utilisant la procédure suivante.

Procédure

Naviguez jusqu'à la page de téléchargements OpenShift Container Platform sur le portail client Red Hat.
Sélectionnez la version appropriée dans la liste déroulante Version.
Cliquez sur Download Now à côté de l'entrée OpenShift v4.12 macOS Client et enregistrez le fichier.
Note
Pour macOS arm64, choisissez l'entrée OpenShift v4.12 macOS arm64 Client.
Décompressez l'archive.
Déplacez le binaire oc dans un répertoire de votre PATH.
Pour vérifier votre PATH, ouvrez un terminal et exécutez la commande suivante :
```
$ echo $PATH
```

Après l'installation de la CLI OpenShift, elle est disponible à l'aide de la commande oc:

oc <command>

7.9.12. 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.

Conditions préalables

You deployed an OpenShift Container Platform cluster.
Vous avez installé le CLI oc.

Procédure

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
```
Exemple de sortie
```
system:admin
```

Ressources complémentaires

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

7.9.13. Telemetry access for OpenShift Container Platform

In OpenShift Container Platform 4.12, 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 Hybrid Cloud Console.

After you confirm that your OpenShift Cluster Manager Hybrid Cloud Console 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.

Ressources complémentaires

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

7.9.14. Prochaines étapes

Customize your cluster.
If necessary, you can opt out of remote health reporting.

7.9.1. Conditions préalables

7.9.2. Private clusters

7.9.2.1. Private clusters in Azure

7.9.2.1.1. Limitations

7.9.2.2. User-defined outbound routing

Private cluster with network address translation

Private cluster with Azure Firewall

Private cluster with a proxy configuration

Private cluster with no internet access

7.9.3. About reusing a VNet for your OpenShift Container Platform cluster

7.9.3.1. Requirements for using your VNet

7.9.3.1.1. Network security group requirements

7.9.3.2. Division of permissions

7.9.3.3. Isolation between clusters

7.9.4. Accès à l'internet pour OpenShift Container Platform

7.9.5. Generating a key pair for cluster node SSH access

7.9.6. Obtaining the installation program

7.9.7. Manually creating the installation configuration file

7.9.7.1. Installation configuration parameters

7.9.7.1.1. Required configuration parameters

7.9.7.1.2. Network configuration parameters

7.9.7.1.3. Optional configuration parameters

7.9.7.1.4. Additional Azure configuration parameters

7.9.7.2. Minimum resource requirements for cluster installation

7.9.7.3. Tested instance types for Azure

7.9.7.4. Tested instance types for Azure ARM

7.9.7.5. Sample customized install-config.yaml file for Azure

7.9.7.6. Configuring the cluster-wide proxy during installation

7.9.8. Enabling Accelerated Networking during installation

7.9.9. Deploying the cluster

7.9.10. Finalizing user-managed encryption after installation

7.9.11. Installer le CLI OpenShift en téléchargeant le binaire

Installation de la CLI OpenShift sur Linux

Installation de la CLI OpenShift sur Windows

Installation de la CLI OpenShift sur macOS

7.9.12. Logging in to the cluster by using the CLI

7.9.13. Telemetry access for OpenShift Container Platform

7.9.14. Prochaines étapes

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