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Cluster API configuration options for Google Cloud Platform

Managing machines with the Cluster API is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope.

You can change the configuration of your Google Cloud Platform (GCP) Cluster API machines by updating values in the Cluster API custom resource manifests.

Sample YAML for configuring Google Cloud Platform clusters

The following example YAML files show configurations for a Google Cloud Platform cluster.

Sample YAML for a Cluster API infrastructure resource on Google Cloud Platform

The infrastructure resource is provider-specific and defines properties that are shared by all the compute machine sets in the cluster, such as the region and subnets. The compute machine set references this resource when creating machines.

apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
kind: GCPCluster (1)
metadata:
  name: <cluster_name> (2)
spec:
  controlPlaneEndpoint: (3)
    host: <control_plane_endpoint_address>
    port: 6443
  network:
    name: <cluster_name>-network
  project: <project> (4)
  region: <region> (5)
1 Specify the infrastructure kind for the cluster. This value must match the value for your platform.
2 Specify the cluster ID as the name of the cluster.
3 Specify the IP address of the control plane endpoint and the port used to access it.
4 Specify the GCP project name.
5 Specify the GCP region.

Sample YAML for a Cluster API machine template resource on Google Cloud Platform

The machine template resource is provider-specific and defines the basic properties of the machines that a compute machine set creates. The compute machine set references this template when creating machines.

apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
kind: GCPMachineTemplate (1)
metadata:
  name: <template_name> (2)
  namespace: openshift-cluster-api
spec:
  template:
    spec: (3)
      rootDeviceType: pd-ssd
      rootDeviceSize: 128
      instanceType: n1-standard-4
      image: projects/rhcos-cloud/global/images/rhcos-411-85-202203181601-0-gcp-x86-64
      subnet: <cluster_name>-worker-subnet
      serviceAccounts:
        email: <service_account_email_address>
        scopes:
          - https://www.googleapis.com/auth/cloud-platform
      additionalLabels:
        kubernetes-io-cluster-<cluster_name>: owned
      additionalNetworkTags:
        - <cluster_name>-worker
      ipForwarding: Disabled
1 Specify the machine template kind. This value must match the value for your platform.
2 Specify a name for the machine template.
3 Specify the details for your environment. The values here are examples.

Sample YAML for a Cluster API compute machine set resource on Google Cloud Platform

The compute machine set resource defines additional properties of the machines that it creates. The compute machine set also references the infrastructure resource and machine template when creating machines.

apiVersion: cluster.x-k8s.io/v1beta1
kind: MachineSet
metadata:
  name: <machine_set_name> (1)
  namespace: openshift-cluster-api
spec:
  clusterName: <cluster_name> (2)
  replicas: 1
  selector:
    matchLabels:
      test: example
  template:
    metadata:
      labels:
        test: example
    spec:
      bootstrap:
         dataSecretName: worker-user-data (3)
      clusterName: <cluster_name>
      infrastructureRef:
        apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
        kind: GCPMachineTemplate (4)
        name: <template_name> (5)
      failureDomain: <failure_domain> (6)
1 Specify a name for the compute machine set.
2 Specify the cluster ID as the name of the cluster.
3 For the Cluster API Technology Preview, the Operator can use the worker user data secret from the openshift-machine-api namespace.
4 Specify the machine template kind. This value must match the value for your platform.
5 Specify the machine template name.
6 Specify the failure domain within the GCP region.