Installing a cluster on GCP into a shared VPC

In OKD version 4.14, you can install a cluster into a shared Virtual Private Cloud (VPC) on Google Cloud Platform (GCP). In this installation method, the cluster is configured to use a VPC from a different GCP project. A shared VPC enables an organization to connect resources from multiple projects to a common VPC network. You can communicate within the organization securely and efficiently by using internal IP addresses from that network. For more information about shared VPC, see Shared VPC overview in the GCP documentation.

The installation program provisions the rest of the required infrastructure, which you can further customize. To customize the installation, you modify parameters in the install-config.yaml file before you install the cluster.

Prerequisites

Generating a key pair for cluster node SSH access

During an OKD installation, you can provide an SSH public key to the installation program. The key is passed to the Fedora CoreOS (FCOS) 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 FCOS 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.

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

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

On clusters running Fedora CoreOS (FCOS), the SSH keys specified in the Ignition config files are written to the /home/core/.ssh/authorized_keys.d/core file. However, the Machine Config Operator manages SSH keys in the /home/core/.ssh/authorized_keys file and configures sshd to ignore the /home/core/.ssh/authorized_keys.d/core file. As a result, newly provisioned OKD nodes are not accessible using SSH until the Machine Config Operator reconciles the machine configs with the authorized_keys file. After you can access the nodes using SSH, you can delete the /home/core/.ssh/authorized_keys.d/core file.

Procedure

  1. 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:

    1. $ ssh-keygen -t ed25519 -N '' -f <path>/<file_name> (1)
    1Specify 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.

    If you plan to install an OKD cluster that uses the Fedora cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures, do not create a key that uses the ed25519 algorithm. Instead, create a key that uses the rsa or ecdsa algorithm.

  2. View the public SSH key:

    1. $ cat <path>/<file_name>.pub

    For example, run the following to view the ~/.ssh/id_ed25519.pub public key:

    1. $ cat ~/.ssh/id_ed25519.pub

  3. 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.

    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:

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

      Example output

      1. Agent pid 31874

      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.

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

    1. $ ssh-add <path>/<file_name> (1)
    1Specify the path and file name for your SSH private key, such as ~/.ssh/id_ed25519

    Example output

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

Next steps

  • When you install OKD, provide the SSH public key to the installation program.

Obtaining the installation program

Before you install OKD, download the installation file on the host you are using for installation.

Prerequisites

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

Procedure

  1. Download installer from https://github.com/openshift/okd/releases

    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.

    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 OKD uninstallation procedures for your specific cloud provider.

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

    1. $ tar -xvf openshift-install-linux.tar.gz

  3. 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 OKD components.

    Using a pull secret from the Red Hat OpenShift Cluster Manager is not required. You can use a pull secret for another private registry. Or, if you do not need the cluster to pull images from a private registry, you can use {"auths":{"fake":{"auth":"aWQ6cGFzcwo="}}} as the pull secret when prompted during the installation.

    If you do not use the pull secret from the Red Hat OpenShift Cluster Manager:

    • Red Hat Operators are not available.

    • The Telemetry and Insights operators do not send data to Red Hat.

    • Content from the Red Hat Container Catalog registry, such as image streams and Operators, are not available.

Creating the installation files for GCP

To install OKD on Google Cloud Platform (GCP) into a shared VPC, you must generate the install-config.yaml file and modify it so that the cluster uses the correct VPC networks, DNS zones, and project names.

Manually creating the installation configuration file

You must manually create your installation configuration file when installing OKD on GCP into a shared VPC using installer-provisioned infrastructure.

Prerequisites

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

  • You have obtained the OKD installation program and the pull secret for your cluster.

Procedure

  1. Create an installation directory to store your required installation assets in:

    1. $ mkdir <installation_directory>

    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 OKD version.

  2. Customize the sample install-config.yaml file template that is provided and save it in the <installation_directory>.

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

    • The ImageContentSourcePolicy file is generated as an output of oc mirror after the mirroring process is finished.

    • The oc mirror command generates an ImageContentSourcePolicy file which contains the YAML needed to define ImageContentSourcePolicy. Copy the text from this file and paste it into your install-config.yaml file.

    • You must run the ‘oc mirror’ command twice. The first time you run the oc mirror command, you get a full ImageContentSourcePolicy file. The second time you run the oc mirror command, you only get the difference between the first and second run. Because of this behavior, you must always keep a backup of these files in case you need to merge them into one complete ImageContentSourcePolicy file. Keeping a backup of these two output files ensures that you have a complete ImageContentSourcePolicy file.

  3. Back up the install-config.yaml file so that you can use it to install multiple clusters.

    The install-config.yaml file is consumed during the next step of the installation process. You must back it up now.

Additional resources

Enabling Shielded VMs

You can use Shielded VMs when installing your cluster. Shielded VMs have extra security features including secure boot, firmware and integrity monitoring, and rootkit detection. For more information, see Google’s documentation on Shielded VMs.

Shielded VMs are currently not supported on clusters with 64-bit ARM infrastructures.

Prerequisites

  • You have created an install-config.yaml file.

Procedure

  • Use a text editor to edit the install-config.yaml file prior to deploying your cluster and add one of the following stanzas:

    1. To use shielded VMs for only control plane machines:

      1. controlPlane:
      2.   platform:
      3.     gcp:
      4.        secureBoot: Enabled

    2. To use shielded VMs for only compute machines:

      1. compute:
      2. - platform:
      3.     gcp:
      4.        secureBoot: Enabled

    3. To use shielded VMs for all machines:

      1. platform:
      2.   gcp:
      3.     defaultMachinePlatform:
      4.        secureBoot: Enabled

Enabling Confidential VMs

You can use Confidential VMs when installing your cluster. Confidential VMs encrypt data while it is being processed. For more information, see Google’s documentation on Confidential Computing. You can enable Confidential VMs and Shielded VMs at the same time, although they are not dependent on each other.

Confidential VMs are currently not supported on 64-bit ARM architectures.

Prerequisites

  • You have created an install-config.yaml file.

Procedure

  • Use a text editor to edit the install-config.yaml file prior to deploying your cluster and add one of the following stanzas:

    1. To use confidential VMs for only control plane machines:

      1. controlPlane:
      2.   platform:
      3.     gcp:
      4.        confidentialCompute: Enabled (1)
      5.        type: n2d-standard-8 (2)
      6.        onHostMaintenance: Terminate (3)
      1Enable confidential VMs.
      2Specify a machine type that supports Confidential VMs. Confidential VMs require the N2D or C2D series of machine types. For more information on supported machine types, see Supported operating systems and machine types.
      3Specify the behavior of the VM during a host maintenance event, such as a hardware or software update. For a machine that uses Confidential VM, this value must be set to Terminate, which stops the VM. Confidential VMs do not support live VM migration.

    2. To use confidential VMs for only compute machines:

      1. compute:
      2. - platform:
      3.     gcp:
      4.        confidentialCompute: Enabled
      5.        type: n2d-standard-8
      6.        onHostMaintenance: Terminate

    3. To use confidential VMs for all machines:

      1. platform:
      2.   gcp:
      3.     defaultMachinePlatform:
      4.        confidentialCompute: Enabled
      5.        type: n2d-standard-8
      6.        onHostMaintenance: Terminate

Sample customized install-config.yaml file for shared VPC installation

There are several configuration parameters which are required to install OKD on GCP using a shared VPC. The following is a sample install-config.yaml file which demonstrates these fields.

This sample YAML file is provided for reference only. You must modify this file with the correct values for your environment and cluster.

  1. apiVersion: v1
  2. baseDomain: example.com
  3. credentialsMode: Passthrough (1)
  4. metadata:
  5.   name: cluster_name
  6. platform:
  7.   gcp:
  8.     computeSubnet: shared-vpc-subnet-1 (2)
  9.     controlPlaneSubnet: shared-vpc-subnet-2 (3)
  10.     network: shared-vpc (4)
  11.     networkProjectID: host-project-name (5)
  12.     projectID: service-project-name (6)
  13.     region: us-east1
  14.     defaultMachinePlatform:
  15.       tags: (7)
  16.       - global-tag1
  17. controlPlane:
  18.   name: master
  19.   platform:
  20.     gcp:
  21.       tags: (7)
  22.       - control-plane-tag1
  23.       type: n2-standard-4
  24.       zones:
  25.       - us-central1-a
  26.       - us-central1-c
  27.   replicas: 3
  28. compute:
  29. - name: worker
  30.   platform:
  31.     gcp:
  32.       tags: (7)
  33.       - compute-tag1
  34.       type: n2-standard-4
  35.       zones:
  36.       - us-central1-a
  37.       - us-central1-c
  38.   replicas: 3
  39. networking:
  40.   clusterNetwork:
  41.   - cidr: 10.128.0.0/14
  42.     hostPrefix: 23
  43.   machineNetwork:
  44.   - cidr: 10.0.0.0/16
  45. pullSecret: '{"auths": ...}'
  46. sshKey: ssh-ed25519 AAAA... (8)
1credentialsMode must be set to Passthrough or Manual. See the “Prerequisites” section for the required GCP permissions that your service account must have.
2The name of the subnet in the shared VPC for compute machines to use.
3The name of the subnet in the shared VPC for control plane machines to use.
4The name of the shared VPC.
5The name of the host project where the shared VPC exists.
6The name of the GCP project where you want to install the cluster.
7Optional. One or more network tags to apply to compute machines, control plane machines, or all machines.
8You can optionally provide the sshKey value that you use to access the machines in your cluster.

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 OKD cluster to use a proxy by configuring the proxy settings in the install-config.yaml file.

Prerequisites

  • You have an existing install-config.yaml file.

  • You reviewed the sites that your cluster requires access to and determined whether any of them need to bypass the proxy. By default, all cluster egress traffic is proxied, including calls to hosting cloud provider APIs. You added sites to the Proxy object’s spec.noProxy field to bypass the proxy if necessary.

    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 OpenStack, the Proxy object status.noProxy field is also populated with the instance metadata endpoint (169.254.169.254).

Procedure

  1. Edit your install-config.yaml file and add the proxy settings. For example:

    1. apiVersion: v1
    2. baseDomain: my.domain.com
    3. proxy:
    4.   httpProxy: http://<username>:<pswd>@<ip>:<port> (1)
    5.   httpsProxy: https://<username>:<pswd>@<ip>:<port> (2)
    6.   noProxy: example.com (3)
    7. additionalTrustBundle: | (4)
    8.     -----BEGIN CERTIFICATE-----
    9.     <MY_TRUSTED_CA_CERT>
    10.     -----END CERTIFICATE-----
    11. additionalTrustBundlePolicy: <policy_to_add_additionalTrustBundle> (5)
    1A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.
    2A proxy URL to use for creating HTTPS connections outside the cluster.
    3A 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.
    4If 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 Fedora CoreOS (FCOS) 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 FCOS trust bundle.
    5Optional: 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.

    The installation program does not support the proxy readinessEndpoints field.

    If the installer times out, restart and then complete the deployment by using the wait-for command of the installer. For example:

    1. $ ./openshift-install wait-for install-complete —log-level debug

  2. Save the file and reference it when installing OKD.

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.

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

Installing the OpenShift CLI by downloading the binary

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

If you installed an earlier version of oc, you cannot use it to complete all of the commands in OKD 4.14. Download and install the new version of oc.

Installing the OpenShift CLI on Linux

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

Procedure

  1. Navigate to https://mirror.openshift.com/pub/openshift-v4/clients/oc/latest/ and choose the folder for your operating system and architecture.

  2. Download oc.tar.gz.

  3. Unpack the archive:

    1. $ tar xvf <file>

  4. Place the oc binary in a directory that is on your PATH.

    To check your PATH, execute the following command:

    1. $ echo $PATH

After you install the OpenShift CLI, it is available using the oc command:

  1. $ oc <command>

Installing the OpenShift CLI on Windows

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

Procedure

  1. Navigate to https://mirror.openshift.com/pub/openshift-v4/clients/oc/latest/ and choose the folder for your operating system and architecture.

  2. Download oc.zip.

  3. Unzip the archive with a ZIP program.

  4. Move the oc binary to a directory that is on your PATH.

    To check your PATH, open the command prompt and execute the following command:

    1. C:\> path

After you install the OpenShift CLI, it is available using the oc command:

  1. C:\> oc <command>

Installing the OpenShift CLI on macOS

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

Procedure

  1. Navigate to https://mirror.openshift.com/pub/openshift-v4/clients/oc/latest/ and choose the folder for your operating system and architecture.

  2. Download oc.tar.gz.

  3. Unpack and unzip the archive.

  4. Move the oc binary to a directory on your PATH.

    To check your PATH, open a terminal and execute the following command:

    1. $ echo $PATH

After you install the OpenShift CLI, it is available using the oc command:

  1. $ oc <command>

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

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

Manually creating long-term credentials

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

Procedure

  1. If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:

    Sample configuration file snippet

    1. apiVersion: v1
    2. baseDomain: example.com
    3. credentialsMode: Manual
    4. # ...

  2. If you have not previously created installation manifest files, do so by running the following command:

    1. $ openshift-install create manifests

  3. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:

    1. $ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')

  4. Extract the list of CredentialsRequest custom resources (CRs) from the OKD release image by running the following command:

    1. $ oc adm release extract \
    2.   --from=$RELEASE_IMAGE \
    3.   --credentials-requests \
    4.   --included \(1)
    5.   --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \(2)
    6.   --to=<path_to_directory_for_credentials_requests> (3)
    1The —included parameter includes only the manifests that your specific cluster configuration requires.
    2Specify the location of the install-config.yaml file.
    3Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

    This command creates a YAML file for each CredentialsRequest object.

    Sample CredentialsRequest object

    1. apiVersion: cloudcredential.openshift.io/v1
    2. kind: CredentialsRequest
    3. metadata:
    4.   name: <component_credentials_request>
    5.   namespace: openshift-cloud-credential-operator
    6.   ...
    7. spec:
    8.   providerSpec:
    9.     apiVersion: cloudcredential.openshift.io/v1
    10.     kind: GCPProviderSpec
    11.     predefinedRoles:
    12.     - roles/storage.admin
    13.     - roles/iam.serviceAccountUser
    14.     skipServiceCheck: true
    15.   ...

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

    Sample CredentialsRequest object with secrets

    1. apiVersion: cloudcredential.openshift.io/v1
    2. kind: CredentialsRequest
    3. metadata:
    4.   name: <component_credentials_request>
    5.   namespace: openshift-cloud-credential-operator
    6.   ...
    7. spec:
    8.   providerSpec:
    9.     apiVersion: cloudcredential.openshift.io/v1
    10.       ...
    11.   secretRef:
    12.     name: <component_secret>
    13.     namespace: <component_namespace>
    14.   ...

    Sample Secret object

    1. apiVersion: v1
    2. kind: Secret
    3. metadata:
    4.   name: <component_secret>
    5.   namespace: <component_namespace>
    6. data:
    7.   service_account.json: <base64_encoded_gcp_service_account_file>

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

Configuring a GCP cluster to use short-term credentials

To install a cluster that is configured to use GCP Workload Identity, you must configure the CCO utility and create the required GCP resources for your cluster.

Configuring the Cloud Credential Operator utility

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

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

Prerequisites

  • You have access to an OKD account with cluster administrator access.

  • You have installed the OpenShift CLI (oc).

Procedure

  1. Obtain the OKD release image by running the following command:

    1. $ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')

  2. Obtain the CCO container image from the OKD release image by running the following command:

    1. $ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)

    Ensure that the architecture of the $RELEASE_IMAGE matches the architecture of the environment in which you will use the ccoctl tool.

  3. Extract the ccoctl binary from the CCO container image within the OKD release image by running the following command:

    1. $ oc image extract $CCO_IMAGE --file="/usr/bin/ccoctl" -a ~/.pull-secret

  4. Change the permissions to make ccoctl executable by running the following command:

    1. $ chmod 775 ccoctl

Verification

  • To verify that ccoctl is ready to use, display the help file by running the following command:

    1. $ ccoctl --help

    Output of ccoctl --help

    1. OpenShift credentials provisioning tool
    3. Usage:
    4.   ccoctl [command]
    6. Available Commands:
    7.   alibabacloud Manage credentials objects for alibaba cloud
    8.   aws          Manage credentials objects for AWS cloud
    9.   azure        Manage credentials objects for Azure
    10.   gcp          Manage credentials objects for Google cloud
    11.   help         Help about any command
    12.   ibmcloud     Manage credentials objects for IBM Cloud
    13.   nutanix      Manage credentials objects for Nutanix
    15. Flags:
    16.   -h, --help   help for ccoctl
    18. Use "ccoctl [command] --help" for more information about a command.

Creating GCP resources with the Cloud Credential Operator utility

You can use the ccoctl gcp create-all command to automate the creation of GCP resources.

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

Prerequisites

You must have:

  • Extracted and prepared the ccoctl binary.

Procedure

  1. Set a $RELEASE_IMAGE variable with the release image from your installation file by running the following command:

    1. $ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')

  2. Extract the list of CredentialsRequest objects from the OKD release image by running the following command:

    1. $ oc adm release extract \
    2.   --from=$RELEASE_IMAGE \
    3.   --credentials-requests \
    4.   --included \(1)
    5.   --install-config=<path_to_directory_with_installation_configuration>/install-config.yaml \(2)
    6.   --to=<path_to_directory_for_credentials_requests> (3)
    1The —included parameter includes only the manifests that your specific cluster configuration requires.
    2Specify the location of the install-config.yaml file.
    3Specify the path to the directory where you want to store the CredentialsRequest objects. If the specified directory does not exist, this command creates it.

    This command might take a few moments to run.

  3. Use the ccoctl tool to process all CredentialsRequest objects by running the following command:

    1. $ ccoctl gcp create-all \
    2.   --name=<name> \(1)
    3.   --region=<gcp_region> \(2)
    4.   --project=<gcp_project_id> \(3)
    5.   --credentials-requests-dir=<path_to_credentials_requests_directory> (4)
    1Specify the user-defined name for all created GCP resources used for tracking.
    2Specify the GCP region in which cloud resources will be created.
    3Specify the GCP project ID in which cloud resources will be created.
    4Specify the directory containing the files of CredentialsRequest manifests to create GCP service accounts.

    If your cluster uses Technology Preview features that are enabled by the TechPreviewNoUpgrade feature set, you must include the —enable-tech-preview parameter.

Verification

  • To verify that the OKD secrets are created, list the files in the <path_to_ccoctl_output_dir>/manifests directory:

    1. $ ls <path_to_ccoctl_output_dir>/manifests

    Example output

    1. cluster-authentication-02-config.yaml
    2. openshift-cloud-controller-manager-gcp-ccm-cloud-credentials-credentials.yaml
    3. openshift-cloud-credential-operator-cloud-credential-operator-gcp-ro-creds-credentials.yaml
    4. openshift-cloud-network-config-controller-cloud-credentials-credentials.yaml
    5. openshift-cluster-csi-drivers-gcp-pd-cloud-credentials-credentials.yaml
    6. openshift-image-registry-installer-cloud-credentials-credentials.yaml
    7. openshift-ingress-operator-cloud-credentials-credentials.yaml
    8. openshift-machine-api-gcp-cloud-credentials-credentials.yaml

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

Incorporating the Cloud Credential Operator utility manifests

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

Prerequisites

  • You have configured an account with the cloud platform that hosts your cluster.

  • You have configured the Cloud Credential Operator utility (ccoctl).

  • You have created the cloud provider resources that are required for your cluster with the ccoctl utility.

Procedure

  1. If you did not set the credentialsMode parameter in the install-config.yaml configuration file to Manual, modify the value as shown:

    Sample configuration file snippet

    1. apiVersion: v1
    2. baseDomain: example.com
    3. credentialsMode: Manual
    4. # ...

  2. If you have not previously created installation manifest files, do so by running the following command:

    1. $ openshift-install create manifests

  3. Copy the manifests that the ccoctl utility generated to the manifests directory that the installation program created by running the following command:

    1. $ cp /<path_to_ccoctl_output_dir>/manifests/* ./manifests/

  4. Copy the private key that the ccoctl utility generated in the tls directory to the installation directory by running the following command:

    1. $ cp -a /<path_to_ccoctl_output_dir>/tls .

Deploying the cluster

You can install OKD on a compatible cloud platform.

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

Prerequisites

  • You have configured an account with the cloud platform that hosts your cluster.

  • You have the OKD installation program and the pull secret for your cluster.

  • You have verified that the cloud provider account on your host has the correct permissions to deploy the cluster. An account with incorrect permissions causes the installation process to fail with an error message that displays the missing permissions.

Procedure

  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. Change to the directory that contains the installation program and initialize the cluster deployment:

    1. $ ./openshift-install create cluster --dir <installation_directory> \ (1)
    2.     --log-level=info (2)
    1For <installation_directory>, specify the location of your customized ./install-config.yaml file.
    2To view different installation details, specify warn, debug, or error instead of info.

  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.

Verification

When the cluster deployment completes successfully:

  • The terminal displays directions for accessing your cluster, including a link to the web console and credentials for the kubeadmin user.

  • Credential information also outputs to <installation_directory>/.openshift_install.log.

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

Example output

  1. ...
  2. INFO Install complete!
  3. INFO To access the cluster as the system:admin user when using 'oc', run 'export KUBECONFIG=/home/myuser/install_dir/auth/kubeconfig'
  4. INFO Access the OpenShift web-console here: https://console-openshift-console.apps.mycluster.example.com
  5. INFO Login to the console with user: "kubeadmin", and password: "password"
  6. INFO Time elapsed: 36m22s

  • The Ignition config files that the installation program generates contain certificates that expire after 24 hours, which are then renewed at that time. If the cluster is shut down before renewing the certificates and the cluster is later restarted after the 24 hours have elapsed, the cluster automatically recovers the expired certificates. The exception is that you must manually approve the pending node-bootstrapper certificate signing requests (CSRs) to recover kubelet certificates. See the documentation for Recovering from expired control plane certificates for more information.

  • It is recommended that you use Ignition config files within 12 hours after they are generated because the 24-hour certificate rotates from 16 to 22 hours after the cluster is installed. By using the Ignition config files within 12 hours, you can avoid installation failure if the certificate update runs during installation.

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 OKD installation.

Prerequisites

  • You deployed an OKD cluster.

  • You installed the oc CLI.

Procedure

  1. Export the kubeadmin credentials:

    1. $ export KUBECONFIG=<installation_directory>/auth/kubeconfig (1)
    1For <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:

    1. $ oc whoami

    Example output

    1. system:admin

Additional resources

Additional resources

Next steps