Chapter 1. Installing on GCP

Procedure

1. Identify your domain, or subdomain, and registrar. You can transfer an existing domain and registrar or obtain a new one through GCP or another source.

   Note

   If you purchase a new domain, it can take time for the relevant DNS changes to propagate. For more information about purchasing domains through Google, see Google Domains.

2. Create a public hosted zone for your domain or subdomain in your GCP project. See Creating public zones in the GCP documentation.

   Use an appropriate root domain, such as openshiftcorp.com, or subdomain, such as clusters.openshiftcorp.com.

3. Extract the new authoritative name servers from the hosted zone records. See Look up your Cloud DNS name servers in the GCP documentation.

   You typically have four name servers.

4. Update the registrar records for the name servers that your domain uses. For example, if you registered your domain to Google Domains, see the following topic in the Google Domains Help: How to switch to custom name servers.
5. If you migrated your root domain to Google Cloud DNS, migrate your DNS records. See Migrating to Cloud DNS in the GCP documentation.
6. If you use a subdomain, follow your company’s procedures to add its delegation records to the parent domain. This process might include a request to your company’s IT department or the division that controls the root domain and DNS services for your company.

Procedure

1. Create a service account in the project that you use to host your OpenShift Container Platform cluster. See Creating a service account in the GCP documentation.

2. Grant the service account the appropriate permissions. You can either grant the individual permissions that follow or assign the Owner role to it. See Granting roles to a service account for specific resources.

   Note

   While making the service account an owner of the project is the easiest way to gain the required permissions, it means that service account has complete control over the project. You must determine if the risk that comes from offering that power is acceptable.

3. Create the service account key in JSON format. See Creating service account keys in the GCP documentation.

   The service account key is required to create a cluster.

Procedure

1. If you do not have an SSH key that is configured for password-less authentication on your computer, 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_rsa, of the new SSH key. If you have an existing key pair, ensure your public key is in the your ~/.ssh directory.

   Running this command generates an SSH key that does not require a password in the location that you specified.

   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.

2. Start the ssh-agent process as a background task:

   $ eval "$(ssh-agent -s)"

   Example output

   Agent pid 31874

1. Add your SSH private key to the ssh-agent:

   $ ssh-add <path>/<file_name> 1

   Example output

   Identity added: /home/<you>/<path>/<file_name> (<computer_name>)

   1

   Specify the path and file name for your SSH private key, such as ~/.ssh/id_rsa

2. Set the GOOGLE_APPLICATION_CREDENTIALS environment variable to the full path to your service account private key file.

   $ export GOOGLE_APPLICATION_CREDENTIALS="<your_service_account_file>"

3. Verify that the credentials were applied.

   $ gcloud auth list

Procedure

1. Access the Infrastructure Provider page on the Red Hat OpenShift Cluster Manager site. If you have a Red Hat account, log in with your credentials. If you do not, create an account.

2. Navigate to the page for your installation type, download the installation program for your operating system, 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 both the installation program and the files that the installation program creates after you finish installing the cluster.

   Important

   Deleting the files created by the installation program does not remove your cluster, even if the cluster failed during installation. You must complete the OpenShift Container Platform uninstallation procedures outlined for your specific cloud provider to remove your cluster entirely.

3. Extract the installation program. For example, on a computer that uses a Linux operating system, run the following command:

   $ tar xvf <installation_program>.tar.gz

4. From the Pull Secret page on the Red Hat OpenShift Cluster Manager site, download your installation pull secret as a .txt file. 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.

Procedure

1. Remove any existing GCP credentials that do not use the service account key for the GCP account that you configured for your cluster and that are stored in the following locations:

   • The GOOGLE_CREDENTIALS, GOOGLE_CLOUD_KEYFILE_JSON, or GCLOUD_KEYFILE_JSON environment variables
   • The ~/.gcp/osServiceAccount.json file
   • The gcloud cli default credentials

2. Run the installation program:

   $ ./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.

   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.

   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 gcp as the platform to target.
   3. If you have not configured the service account key for your GCP account on your computer, you must obtain it from GCP and paste the contents of the file or enter the absolute path to the file.
   4. Select the project ID to provision the cluster in. The default value is specified by the service account that you configured.
   5. Select the region to deploy the cluster to.
   6. Select the base domain to deploy the cluster to. The base domain corresponds to the public DNS zone that you created for your cluster.
   7. Enter a descriptive name for your cluster. If you provide a name that is longer than 6 characters, only the first 6 characters will be used in the infrastructure ID that is generated from the cluster name.
   8. Paste the pull secret that you obtained from the Pull Secret page on the Red Hat OpenShift Cluster Manager site.
   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.

   When the cluster deployment completes, directions for accessing your cluster, including a link to its web console and credentials for the kubeadmin user, display in your terminal.

   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.

   Important

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

3. Optional: You can reduce the number of permissions for the service account that you used to install the cluster.

   • If you assigned the Owner role to your service account, you can remove that role and replace it with the Viewer role.
   • If you included the Service Account Key Admin role, you can remove it.

Procedure

1. 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.

2. Verify you can run oc commands successfully using the exported configuration:

   $ oc whoami

   Example output

   system:admin

Procedure

1. If you do not have an SSH key that is configured for password-less authentication on your computer, 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_rsa, of the new SSH key. If you have an existing key pair, ensure your public key is in the your ~/.ssh directory.

   Running this command generates an SSH key that does not require a password in the location that you specified.

   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.

2. Start the ssh-agent process as a background task:

   $ eval "$(ssh-agent -s)"

   Example output

   Agent pid 31874

1. Add your SSH private key to the ssh-agent:

   $ ssh-add <path>/<file_name> 1

   Example output

   Identity added: /home/<you>/<path>/<file_name> (<computer_name>)

   1

   Specify the path and file name for your SSH private key, such as ~/.ssh/id_rsa

2. Set the GOOGLE_APPLICATION_CREDENTIALS environment variable to the full path to your service account private key file.

   $ export GOOGLE_APPLICATION_CREDENTIALS="<your_service_account_file>"

3. Verify that the credentials were applied.

   $ gcloud auth list

Procedure

1. Access the Infrastructure Provider page on the Red Hat OpenShift Cluster Manager site. If you have a Red Hat account, log in with your credentials. If you do not, create an account.

2. Navigate to the page for your installation type, download the installation program for your operating system, 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 both the installation program and the files that the installation program creates after you finish installing the cluster.

   Important

   Deleting the files created by the installation program does not remove your cluster, even if the cluster failed during installation. You must complete the OpenShift Container Platform uninstallation procedures outlined for your specific cloud provider to remove your cluster entirely.

3. Extract the installation program. For example, on a computer that uses a Linux operating system, run the following command:

   $ tar xvf <installation_program>.tar.gz

4. From the Pull Secret page on the Red Hat OpenShift Cluster Manager site, download your installation pull secret as a .txt file. 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.

Procedure

1. Create the install-config.yaml file.

   1. 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 gcp as the platform to target.
      3. If you have not configured the service account key for your GCP account on your computer, you must obtain it from GCP and paste the contents of the file or enter the absolute path to the file.
      4. Select the project ID to provision the cluster in. The default value is specified by the service account that you configured.
      5. Select the region to deploy the cluster to.
      6. Select the base domain to deploy the cluster to. The base domain corresponds to the public DNS zone that you created for your cluster.
      7. Enter a descriptive name for your cluster.
      8. Paste the pull secret that you obtained from the Pull Secret page on the Red Hat OpenShift Cluster Manager site.
2. Modify the install-config.yaml file. You can find more information about the available parameters in the Installation configuration parameters section.

3. 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.

Procedure

1. Remove any existing GCP credentials that do not use the service account key for the GCP account that you configured for your cluster and that are stored in the following locations:

   • The GOOGLE_CREDENTIALS, GOOGLE_CLOUD_KEYFILE_JSON, or GCLOUD_KEYFILE_JSON environment variables
   • The ~/.gcp/osServiceAccount.json file
   • The gcloud cli default credentials

2. Run the installation program:

   $ ./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.

   When the cluster deployment completes, directions for accessing your cluster, including a link to its web console and credentials for the kubeadmin user, display in your terminal.

   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.

   Important

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

3. Optional: You can reduce the number of permissions for the service account that you used to install the cluster.

   • If you assigned the Owner role to your service account, you can remove that role and replace it with the Viewer role.
   • If you included the Service Account Key Admin role, you can remove it.

Procedure

1. 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.

2. Verify you can run oc commands successfully using the exported configuration:

   $ oc whoami

   Example output

   system:admin

Procedure

1. If you do not have an SSH key that is configured for password-less authentication on your computer, 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_rsa, of the new SSH key. If you have an existing key pair, ensure your public key is in the your ~/.ssh directory.

   Running this command generates an SSH key that does not require a password in the location that you specified.

   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.

2. Start the ssh-agent process as a background task:

   $ eval "$(ssh-agent -s)"

   Example output

   Agent pid 31874

1. Add your SSH private key to the ssh-agent:

   $ ssh-add <path>/<file_name> 1

   Example output

   Identity added: /home/<you>/<path>/<file_name> (<computer_name>)

   1

   Specify the path and file name for your SSH private key, such as ~/.ssh/id_rsa

2. Set the GOOGLE_APPLICATION_CREDENTIALS environment variable to the full path to your service account private key file.

   $ export GOOGLE_APPLICATION_CREDENTIALS="<your_service_account_file>"

3. Verify that the credentials were applied.

   $ gcloud auth list

Procedure

1. Access the Infrastructure Provider page on the Red Hat OpenShift Cluster Manager site. If you have a Red Hat account, log in with your credentials. If you do not, create an account.

2. Navigate to the page for your installation type, download the installation program for your operating system, 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 both the installation program and the files that the installation program creates after you finish installing the cluster.

   Important

   Deleting the files created by the installation program does not remove your cluster, even if the cluster failed during installation. You must complete the OpenShift Container Platform uninstallation procedures outlined for your specific cloud provider to remove your cluster entirely.

3. Extract the installation program. For example, on a computer that uses a Linux operating system, run the following command:

   $ tar xvf <installation_program>.tar.gz

4. From the Pull Secret page on the Red Hat OpenShift Cluster Manager site, download your installation pull secret as a .txt file. 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.

Procedure

1. Create the install-config.yaml file.

   1. 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 gcp as the platform to target.
      3. If you have not configured the service account key for your GCP account on your computer, you must obtain it from GCP and paste the contents of the file or enter the absolute path to the file.
      4. Select the project ID to provision the cluster in. The default value is specified by the service account that you configured.
      5. Select the region to deploy the cluster to.
      6. Select the base domain to deploy the cluster to. The base domain corresponds to the public DNS zone that you created for your cluster.
      7. Enter a descriptive name for your cluster.
      8. Paste the pull secret that you obtained from the Pull Secret page on the Red Hat OpenShift Cluster Manager site.
2. Modify the install-config.yaml file. You can find more information about the available parameters in the Installation configuration parameters section.

3. 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.

Procedure

1. Use the following command to create 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.

2. Create a file that is named cluster-network-03-config.yml in the <installation_directory>/manifests/ directory:

   $ touch <installation_directory>/manifests/cluster-network-03-config.yml 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-network-*

   Example output

   cluster-network-01-crd.yml
   cluster-network-02-config.yml
   cluster-network-03-config.yml

3. Open the cluster-network-03-config.yml file in an editor and enter a CR that describes the Operator configuration you want:

   apiVersion: operator.openshift.io/v1
   kind: Network
   metadata:
     name: cluster
   spec: 1
     clusterNetwork:
     - cidr: 10.128.0.0/14
       hostPrefix: 23
     serviceNetwork:
     - 172.30.0.0/16
     defaultNetwork:
       type: OpenShiftSDN
       openshiftSDNConfig:
         mode: NetworkPolicy
         mtu: 1450
         vxlanPort: 4789

   1

   The parameters for the spec parameter are only an example. Specify your configuration for the Cluster Network Operator in the CR.

   The CNO provides default values for the parameters in the CR, so you must specify only the parameters that you want to change.

4. Save the cluster-network-03-config.yml file and quit the text editor.
5. Optional: Back up the manifests/cluster-network-03-config.yml file. The installation program deletes the manifests/ directory when creating the cluster.

Procedure

1. Run the installation program:

   $ ./openshift-install create cluster --dir=<installation_directory> \ 1
       --log-level=info 2

   1

   For <installation_directory>, specify the

   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.

   When the cluster deployment completes, directions for accessing your cluster, including a link to its web console and credentials for the kubeadmin user, display in your terminal.

   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.

   Important

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

Procedure

1. 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.

2. Verify you can run oc commands successfully using the exported configuration:

   $ oc whoami

   Example output

   system:admin

Procedure

1. If you do not have an SSH key that is configured for password-less authentication on your computer, 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_rsa, of the new SSH key. If you have an existing key pair, ensure your public key is in the your ~/.ssh directory.

   Running this command generates an SSH key that does not require a password in the location that you specified.

   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.

2. Start the ssh-agent process as a background task:

   $ eval "$(ssh-agent -s)"

   Example output

   Agent pid 31874

1. Add your SSH private key to the ssh-agent:

   $ ssh-add <path>/<file_name> 1

   Example output

   Identity added: /home/<you>/<path>/<file_name> (<computer_name>)

   1

   Specify the path and file name for your SSH private key, such as ~/.ssh/id_rsa

2. Set the GOOGLE_APPLICATION_CREDENTIALS environment variable to the full path to your service account private key file.

   $ export GOOGLE_APPLICATION_CREDENTIALS="<your_service_account_file>"

3. Verify that the credentials were applied.

   $ gcloud auth list

Procedure

1. Access the Infrastructure Provider page on the Red Hat OpenShift Cluster Manager site. If you have a Red Hat account, log in with your credentials. If you do not, create an account.

2. Navigate to the page for your installation type, download the installation program for your operating system, 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 both the installation program and the files that the installation program creates after you finish installing the cluster.

   Important

   Deleting the files created by the installation program does not remove your cluster, even if the cluster failed during installation. You must complete the OpenShift Container Platform uninstallation procedures outlined for your specific cloud provider to remove your cluster entirely.

3. Extract the installation program. For example, on a computer that uses a Linux operating system, run the following command:

   $ tar xvf <installation_program>.tar.gz

4. From the Pull Secret page on the Red Hat OpenShift Cluster Manager site, download your installation pull secret as a .txt file. 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.

Procedure

1. Create the install-config.yaml file.

   1. 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 gcp as the platform to target.
      3. If you have not configured the service account key for your GCP account on your computer, you must obtain it from GCP and paste the contents of the file or enter the absolute path to the file.
      4. Select the project ID to provision the cluster in. The default value is specified by the service account that you configured.
      5. Select the region to deploy the cluster to.
      6. Select the base domain to deploy the cluster to. The base domain corresponds to the public DNS zone that you created for your cluster.
      7. Enter a descriptive name for your cluster.
      8. Paste the pull secret that you obtained from the Pull Secret page on the Red Hat OpenShift Cluster Manager site.
2. Modify the install-config.yaml file. You can find more information about the available parameters in the Installation configuration parameters section.

3. 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.

Procedure

1. Remove any existing GCP credentials that do not use the service account key for the GCP account that you configured for your cluster and that are stored in the following locations:

   • The GOOGLE_CREDENTIALS, GOOGLE_CLOUD_KEYFILE_JSON, or GCLOUD_KEYFILE_JSON environment variables
   • The ~/.gcp/osServiceAccount.json file
   • The gcloud cli default credentials

2. Run the installation program:

   $ ./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.

   When the cluster deployment completes, directions for accessing your cluster, including a link to its web console and credentials for the kubeadmin user, display in your terminal.

   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.

   Important

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

3. Optional: You can reduce the number of permissions for the service account that you used to install the cluster.

   • If you assigned the Owner role to your service account, you can remove that role and replace it with the Viewer role.
   • If you included the Service Account Key Admin role, you can remove it.

Procedure

1. 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.

2. Verify you can run oc commands successfully using the exported configuration:

   $ oc whoami

   Example output

   system:admin

Procedure

1. If you do not have an SSH key that is configured for password-less authentication on your computer, 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_rsa, of the new SSH key. If you have an existing key pair, ensure your public key is in the your ~/.ssh directory.

   Running this command generates an SSH key that does not require a password in the location that you specified.

   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.

2. Start the ssh-agent process as a background task:

   $ eval "$(ssh-agent -s)"

   Example output

   Agent pid 31874

1. Add your SSH private key to the ssh-agent:

   $ ssh-add <path>/<file_name> 1

   Example output

   Identity added: /home/<you>/<path>/<file_name> (<computer_name>)

   1

   Specify the path and file name for your SSH private key, such as ~/.ssh/id_rsa

2. Set the GOOGLE_APPLICATION_CREDENTIALS environment variable to the full path to your service account private key file.

   $ export GOOGLE_APPLICATION_CREDENTIALS="<your_service_account_file>"

3. Verify that the credentials were applied.

   $ gcloud auth list

Procedure

1. Access the Infrastructure Provider page on the Red Hat OpenShift Cluster Manager site. If you have a Red Hat account, log in with your credentials. If you do not, create an account.

2. Navigate to the page for your installation type, download the installation program for your operating system, 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 both the installation program and the files that the installation program creates after you finish installing the cluster.

   Important

   Deleting the files created by the installation program does not remove your cluster, even if the cluster failed during installation. You must complete the OpenShift Container Platform uninstallation procedures outlined for your specific cloud provider to remove your cluster entirely.

3. Extract the installation program. For example, on a computer that uses a Linux operating system, run the following command:

   $ tar xvf <installation_program>.tar.gz

4. From the Pull Secret page on the Red Hat OpenShift Cluster Manager site, download your installation pull secret as a .txt file. 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.

Procedure

1. 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.

2. Customize the following install-config.yaml file template and save it in the <installation_directory>.

   Note

   You must name this configuration file install-config.yaml.

3. 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.

Procedure

1. Run the installation program:

   $ ./openshift-install create cluster --dir=<installation_directory> \ 1
       --log-level=info 2

   1

   For <installation_directory>, specify the

   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.

   When the cluster deployment completes, directions for accessing your cluster, including a link to its web console and credentials for the kubeadmin user, display in your terminal.

   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.

   Important

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

Procedure

1. 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.

2. Verify you can run oc commands successfully using the exported configuration:

   $ oc whoami

   Example output

   system:admin

Procedure

1. Copy the template from the Deployment Manager template for the VPC section of this topic and save it as 01_vpc.py on your computer. This template describes the VPC that your cluster requires.

2. Create a 01_vpc.yaml resource definition file:

   $ cat <<EOF >01_vpc.yaml
   imports:
   - path: 01_vpc.py
   
   resources:
   - name: cluster-vpc
     type: 01_vpc.py
     properties:
       infra_id: '${INFRA_ID}' 1
       region: '${REGION}' 2
       master_subnet_cidr: '${MASTER_SUBNET_CIDR}' 3
       worker_subnet_cidr: '${WORKER_SUBNET_CIDR}' 4
   EOF

   1

   infra_id is the INFRA_ID infrastructure name from the extraction step.

   2

   region is the region to deploy the cluster into, for example us-central1.

   3

   master_subnet_cidr is the CIDR for the master subnet, for example 10.0.0.0/19.

   4

   worker_subnet_cidr is the CIDR for the worker subnet, for example 10.0.32.0/19.

3. Create the deployment by using the gcloud CLI:

   $ gcloud deployment-manager deployments create ${INFRA_ID}-vpc --config 01_vpc.yaml

1. API load balancer: Provides a common endpoint for users, both human and machine, to interact with and configure the platform. Configure the following conditions:

   • Layer 4 load balancing only. This can be referred to as Raw TCP, SSL Passthrough, or SSL Bridge mode. If you use SSL Bridge mode, you must enable Server Name Indication (SNI) for the API routes.
   • A stateless load balancing algorithm. The options vary based on the load balancer implementation.
   Note

   Session persistence is not required for the API load balancer to function properly.

   Configure the following ports on both the front and back of the load balancers:

   Table 1.27. API load balancer

   Port	Back-end machines (pool members)	Internal	External	Description
   6443	Bootstrap and control plane. You remove the bootstrap machine from the load balancer after the bootstrap machine initializes the cluster control plane. You must configure the /readyz endpoint for the API server health check probe.	X	X	Kubernetes API server
   22623	Bootstrap and control plane. You remove the bootstrap machine from the load balancer after the bootstrap machine initializes the cluster control plane.	X		Machine config server

   Note

   The load balancer must be configured to take a maximum of 30 seconds from the time the API server turns off the /readyz endpoint to the removal of the API server instance from the pool. Within the time frame after /readyz returns an error or becomes healthy, the endpoint must have been removed or added. Probing every 5 or 10 seconds, with two successful requests to become healthy and three to become unhealthy, are well-tested values.

2. Application Ingress load balancer: Provides an Ingress point for application traffic flowing in from outside the cluster. Configure the following conditions:

   • Layer 4 load balancing only. This can be referred to as Raw TCP, SSL Passthrough, or SSL Bridge mode. If you use SSL Bridge mode, you must enable Server Name Indication (SNI) for the Ingress routes.
   • A connection-based or session-based persistence is recommended, based on the options available and types of applications that will be hosted on the platform.

   Configure the following ports on both the front and back of the load balancers:

   Table 1.28. Application Ingress load balancer

   Port	Back-end machines (pool members)	Internal	External	Description
   443	The machines that run the Ingress router pods, compute, or worker, by default.	X	X	HTTPS traffic
   80	The machines that run the Ingress router pods, compute, or worker, by default.	X	X	HTTP traffic

Procedure

1. Copy the template from the Deployment Manager template for the internal load balancer section of this topic and save it as 02_lb_int.py on your computer. This template describes the internal load balancing objects that your cluster requires.
2. For an external cluster, also copy the template from the Deployment Manager template for the external load balancer section of this topic and save it as 02_lb_ext.py on your computer. This template describes the external load balancing objects that your cluster requires.

3. Export the variables that the deployment template uses:

   1. Export the cluster network location:

      $ export CLUSTER_NETWORK=(`gcloud compute networks describe ${INFRA_ID}-network --format json | jq -r .selfLink`)

   2. Export the control plane subnet location:

      $ export CONTROL_SUBNET=(`gcloud compute networks subnets describe ${INFRA_ID}-master-subnet --region=${REGION} --format json | jq -r .selfLink`)

   3. Export the three zones that the cluster uses:

      $ export ZONE_0=(`gcloud compute regions describe ${REGION} --format=json | jq -r .zones[0] | cut -d "/" -f9`)

      $ export ZONE_1=(`gcloud compute regions describe ${REGION} --format=json | jq -r .zones[1] | cut -d "/" -f9`)

      $ export ZONE_2=(`gcloud compute regions describe ${REGION} --format=json | jq -r .zones[2] | cut -d "/" -f9`)

4. Create a 02_infra.yaml resource definition file:

   $ cat <<EOF >02_infra.yaml
   imports:
   - path: 02_lb_ext.py
   - path: 02_lb_int.py 1
   resources:
   - name: cluster-lb-ext 2
     type: 02_lb_ext.py
     properties:
       infra_id: '${INFRA_ID}' 3
       region: '${REGION}' 4
   - name: cluster-lb-int
     type: 02_lb_int.py
     properties:
       cluster_network: '${CLUSTER_NETWORK}'
       control_subnet: '${CONTROL_SUBNET}' 5
       infra_id: '${INFRA_ID}'
       region: '${REGION}'
       zones: 6
       - '${ZONE_0}'
       - '${ZONE_1}'
       - '${ZONE_2}'
   EOF

   1 2

   Required only when deploying an external cluster.

   3

   infra_id is the INFRA_ID infrastructure name from the extraction step.

   4

   region is the region to deploy the cluster into, for example us-central1.

   5

   control_subnet is the URI to the control subnet.

   6

   zones are the zones to deploy the control plane instances into, like us-east1-b, us-east1-c, and us-east1-d.

5. Create the deployment by using the gcloud CLI:

   $ gcloud deployment-manager deployments create ${INFRA_ID}-infra --config 02_infra.yaml

6. Export the cluster IP address:

   $ export CLUSTER_IP=(`gcloud compute addresses describe ${INFRA_ID}-cluster-ip --region=${REGION} --format json | jq -r .address`)

7. For an external cluster, also export the cluster public IP address:

   $ export CLUSTER_PUBLIC_IP=(`gcloud compute addresses describe ${INFRA_ID}-cluster-public-ip --region=${REGION} --format json | jq -r .address`)

Procedure

1. Copy the template from the Deployment Manager template for the private DNS section of this topic and save it as 02_dns.py on your computer. This template describes the private DNS objects that your cluster requires.

2. Create a 02_dns.yaml resource definition file:

   $ cat <<EOF >02_dns.yaml
   imports:
   - path: 02_dns.py
   
   resources:
   - name: cluster-dns
     type: 02_dns.py
     properties:
       infra_id: '${INFRA_ID}' 1
       cluster_domain: '${CLUSTER_NAME}.${BASE_DOMAIN}' 2
       cluster_network: '${CLUSTER_NETWORK}' 3
   EOF

   1

   infra_id is the INFRA_ID infrastructure name from the extraction step.

   2

   cluster_domain is the domain for the cluster, for example openshift.example.com.

   3

   cluster_network is the selfLink URL to the cluster network.

3. Create the deployment by using the gcloud CLI:

   $ gcloud deployment-manager deployments create ${INFRA_ID}-dns --config 02_dns.yaml

4. The templates do not create DNS entries due to limitations of Deployment Manager, so you must create them manually:

   1. Add the internal DNS entries:

      $ if [ -f transaction.yaml ]; then rm transaction.yaml; fi
      $ gcloud dns record-sets transaction start --zone ${INFRA_ID}-private-zone
      $ gcloud dns record-sets transaction add ${CLUSTER_IP} --name api.${CLUSTER_NAME}.${BASE_DOMAIN}. --ttl 60 --type A --zone ${INFRA_ID}-private-zone
      $ gcloud dns record-sets transaction add ${CLUSTER_IP} --name api-int.${CLUSTER_NAME}.${BASE_DOMAIN}. --ttl 60 --type A --zone ${INFRA_ID}-private-zone
      $ gcloud dns record-sets transaction execute --zone ${INFRA_ID}-private-zone

   2. For an external cluster, also add the external DNS entries:

      $ if [ -f transaction.yaml ]; then rm transaction.yaml; fi
      $ gcloud dns record-sets transaction start --zone ${BASE_DOMAIN_ZONE_NAME}
      $ gcloud dns record-sets transaction add ${CLUSTER_PUBLIC_IP} --name api.${CLUSTER_NAME}.${BASE_DOMAIN}. --ttl 60 --type A --zone ${BASE_DOMAIN_ZONE_NAME}
      $ gcloud dns record-sets transaction execute --zone ${BASE_DOMAIN_ZONE_NAME}

Procedure

1. Copy the template from the Deployment Manager template for firewall rules section of this topic and save it as 03_firewall.py on your computer. This template describes the security groups that your cluster requires.

2. Create a 03_firewall.yaml resource definition file:

   $ cat <<EOF >03_firewall.yaml
   imports:
   - path: 03_firewall.py
   
   resources:
   - name: cluster-firewall
     type: 03_firewall.py
     properties:
       allowed_external_cidr: '0.0.0.0/0' 1
       infra_id: '${INFRA_ID}' 2
       cluster_network: '${CLUSTER_NETWORK}' 3
       network_cidr: '${NETWORK_CIDR}' 4
   EOF

   1

   allowed_external_cidr is the CIDR range that can access the cluster API and SSH to the bootstrap host. For an internal cluster, set this value to ${NETWORK_CIDR}.

   2

   infra_id is the INFRA_ID infrastructure name from the extraction step.

   3

   cluster_network is the selfLink URL to the cluster network.

   4

   network_cidr is the CIDR of the VPC network, for example 10.0.0.0/16.

3. Create the deployment by using the gcloud CLI:

   $ gcloud deployment-manager deployments create ${INFRA_ID}-firewall --config 03_firewall.yaml

Procedure

1. Copy the template from the Deployment Manager template for IAM roles section of this topic and save it as 03_iam.py on your computer. This template describes the IAM roles that your cluster requires.

2. Create a 03_iam.yaml resource definition file:

   $ cat <<EOF >03_iam.yaml
   imports:
   - path: 03_iam.py
   resources:
   - name: cluster-iam
     type: 03_iam.py
     properties:
       infra_id: '${INFRA_ID}' 1
   EOF

   1

   infra_id is the INFRA_ID infrastructure name from the extraction step.

3. Create the deployment by using the gcloud CLI:

   $ gcloud deployment-manager deployments create ${INFRA_ID}-iam --config 03_iam.yaml

4. Export the variable for the master service account:

   $ export MASTER_SERVICE_ACCOUNT=(`gcloud iam service-accounts list --filter "email~^${INFRA_ID}-m@${PROJECT_NAME}." --format json | jq -r '.[0].email'`)

5. Export the variable for the worker service account:

   $ export WORKER_SERVICE_ACCOUNT=(`gcloud iam service-accounts list --filter "email~^${INFRA_ID}-w@${PROJECT_NAME}." --format json | jq -r '.[0].email'`)

6. Export the variable for the subnet that hosts the compute machines:

   $ export COMPUTE_SUBNET=(`gcloud compute networks subnets describe ${INFRA_ID}-worker-subnet --region=${REGION} --format json | jq -r .selfLink`)

7. The templates do not create the policy bindings due to limitations of Deployment Manager, so you must create them manually:

   $ gcloud projects add-iam-policy-binding ${PROJECT_NAME} --member "serviceAccount:${MASTER_SERVICE_ACCOUNT}" --role "roles/compute.instanceAdmin"
   $ gcloud projects add-iam-policy-binding ${PROJECT_NAME} --member "serviceAccount:${MASTER_SERVICE_ACCOUNT}" --role "roles/compute.networkAdmin"
   $ gcloud projects add-iam-policy-binding ${PROJECT_NAME} --member "serviceAccount:${MASTER_SERVICE_ACCOUNT}" --role "roles/compute.securityAdmin"
   $ gcloud projects add-iam-policy-binding ${PROJECT_NAME} --member "serviceAccount:${MASTER_SERVICE_ACCOUNT}" --role "roles/iam.serviceAccountUser"
   $ gcloud projects add-iam-policy-binding ${PROJECT_NAME} --member "serviceAccount:${MASTER_SERVICE_ACCOUNT}" --role "roles/storage.admin"
   
   $ gcloud projects add-iam-policy-binding ${PROJECT_NAME} --member "serviceAccount:${WORKER_SERVICE_ACCOUNT}" --role "roles/compute.viewer"
   $ gcloud projects add-iam-policy-binding ${PROJECT_NAME} --member "serviceAccount:${WORKER_SERVICE_ACCOUNT}" --role "roles/storage.admin"

8. Create a service account key and store it locally for later use:

   $ gcloud iam service-accounts keys create service-account-key.json --iam-account=${MASTER_SERVICE_ACCOUNT}

Procedure

1. Obtain the RHCOS image from the RHCOS image mirror page.

   Important

   The RHCOS images might not change with every release of OpenShift Container Platform. You must download an image with the highest version that is less than or equal to the OpenShift Container Platform version that you install. Use the image version that matches your OpenShift Container Platform version if it is available.

   The file name contains the OpenShift Container Platform version number in the format rhcos-<version>-<arch>-gcp.<arch>.tar.gz.

2. Create the Google storage bucket:

   $ gsutil mb gs://<bucket_name>

3. Upload the RHCOS image to the Google storage bucket:

   $ gsutil cp <downloaded_image_file_path>/rhcos-<version>-x86_64-gcp.x86_64.tar.gz  gs://<bucket_name>

4. Export the uploaded RHCOS image location as a variable:

   $ export IMAGE_SOURCE=`gs://<bucket_name>/rhcos-<version>-x86_64-gcp.x86_64.tar.gz`

5. Create the cluster image:

   $ gcloud compute images create "${INFRA_ID}-rhcos-image" \
       --source-uri="${IMAGE_SOURCE}"

Procedure

1. Copy the template from the Deployment Manager template for the bootstrap machine section of this topic and save it as 04_bootstrap.py on your computer. This template describes the bootstrap machine that your cluster requires.

2. Export the location of the Red Hat Enterprise Linux CoreOS (RHCOS) image that the installation program requires:

   $ export CLUSTER_IMAGE=(`gcloud compute images describe ${INFRA_ID}-rhcos-image --format json | jq -r .selfLink`)

3. Create a bucket and upload the bootstrap.ign file:

   $ gsutil mb gs://${INFRA_ID}-bootstrap-ignition
   $ gsutil cp <installation_directory>/bootstrap.ign gs://${INFRA_ID}-bootstrap-ignition/

4. Create a signed URL for the bootstrap instance to use to access the Ignition config. Export the URL from the output as a variable:

   $ export BOOTSTRAP_IGN=`gsutil signurl -d 1h service-account-key.json gs://${INFRA_ID}-bootstrap-ignition/bootstrap.ign | grep "^gs:" | awk '{print $5}'`

5. Create a 04_bootstrap.yaml resource definition file:

   $ cat <<EOF >04_bootstrap.yaml
   imports:
   - path: 04_bootstrap.py
   
   resources:
   - name: cluster-bootstrap
     type: 04_bootstrap.py
     properties:
       infra_id: '${INFRA_ID}' 1
       region: '${REGION}' 2
       zone: '${ZONE_0}' 3
   
       cluster_network: '${CLUSTER_NETWORK}' 4
       control_subnet: '${CONTROL_SUBNET}' 5
       image: '${CLUSTER_IMAGE}' 6
       machine_type: 'n1-standard-4' 7
       root_volume_size: '128' 8
   
       bootstrap_ign: '${BOOTSTRAP_IGN}' 9
   EOF

   1

   infra_id is the INFRA_ID infrastructure name from the extraction step.

   2

   region is the region to deploy the cluster into, for example us-central1.

   3

   zone is the zone to deploy the bootstrap instance into, for example us-central1-b.

   4

   cluster_network is the selfLink URL to the cluster network.

   5

   control_subnet is the selfLink URL to the control subnet.

   6

   image is the selfLink URL to the RHCOS image.

   7

   machine_type is the machine type of the instance, for example n1-standard-4.

   8

   root_volume_size is the boot disk size for the bootstrap machine.

   9

   bootstrap_ign is the URL output when creating a signed URL.

6. Create the deployment by using the gcloud CLI:

   $ gcloud deployment-manager deployments create ${INFRA_ID}-bootstrap --config 04_bootstrap.yaml

7. The templates do not manage load balancer membership due to limitations of Deployment Manager, so you must add the bootstrap machine manually.

   1. Add the bootstrap instance to the internal load balancer instance group:

      $ gcloud compute instance-groups unmanaged add-instances \
          ${INFRA_ID}-bootstrap-instance-group --zone=${ZONE_0} --instances=${INFRA_ID}-bootstrap

   2. Add the bootstrap instance group to the internal load balancer backend service:

      $ gcloud compute backend-services add-backend \
          ${INFRA_ID}-api-internal-backend-service --region=${REGION} --instance-group=${INFRA_ID}-bootstrap-instance-group --instance-group-zone=${ZONE_0}

Procedure

1. Copy the template from the Deployment Manager template for control plane machines section of this topic and save it as 05_control_plane.py on your computer. This template describes the control plane machines that your cluster requires.

2. Export the following variable required by the resource definition:

   $ export MASTER_IGNITION=`cat <installation_directory>/master.ign`

3. Create a 05_control_plane.yaml resource definition file:

   $ cat <<EOF >05_control_plane.yaml
   imports:
   - path: 05_control_plane.py
   
   resources:
   - name: cluster-control-plane
     type: 05_control_plane.py
     properties:
       infra_id: '${INFRA_ID}' 1
       zones: 2
       - '${ZONE_0}'
       - '${ZONE_1}'
       - '${ZONE_2}'
   
       control_subnet: '${CONTROL_SUBNET}' 3
       image: '${CLUSTER_IMAGE}' 4
       machine_type: 'n1-standard-4' 5
       root_volume_size: '128'
       service_account_email: '${MASTER_SERVICE_ACCOUNT}' 6
   
       ignition: '${MASTER_IGNITION}' 7
   EOF

   1

   infra_id is the INFRA_ID infrastructure name from the extraction step.

   2

   zones are the zones to deploy the control plane instances into, for example us-central1-a, us-central1-b, and us-central1-c.

   3

   control_subnet is the selfLink URL to the control subnet.

   4

   image is the selfLink URL to the RHCOS image.

   5

   machine_type is the machine type of the instance, for example n1-standard-4.

   6

   service_account_email is the email address for the master service account that you created.

   7

   ignition is the contents of the master.ign file.

4. Create the deployment by using the gcloud CLI:

   $ gcloud deployment-manager deployments create ${INFRA_ID}-control-plane --config 05_control_plane.yaml

5. The templates do not manage load balancer membership due to limitations of Deployment Manager, so you must add the control plane machines manually.

   • Run the following commands to add the control plane machines to the appropriate instance groups:

     $ gcloud compute instance-groups unmanaged add-instances ${INFRA_ID}-master-${ZONE_0}-instance-group --zone=${ZONE_0} --instances=${INFRA_ID}-m-0
     $ gcloud compute instance-groups unmanaged add-instances ${INFRA_ID}-master-${ZONE_1}-instance-group --zone=${ZONE_1} --instances=${INFRA_ID}-m-1
     $ gcloud compute instance-groups unmanaged add-instances ${INFRA_ID}-master-${ZONE_2}-instance-group --zone=${ZONE_2} --instances=${INFRA_ID}-m-2

   • For an external cluster, you must also run the following commands to add the control plane machines to the target pools:

     $ gcloud compute target-pools add-instances ${INFRA_ID}-api-target-pool --instances-zone="${ZONE_0}" --instances=${INFRA_ID}-m-0
     $ gcloud compute target-pools add-instances ${INFRA_ID}-api-target-pool --instances-zone="${ZONE_1}" --instances=${INFRA_ID}-m-1
     $ gcloud compute target-pools add-instances ${INFRA_ID}-api-target-pool --instances-zone="${ZONE_2}" --instances=${INFRA_ID}-m-2