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Cluster API configuration options for Red Hat OpenStack Platform

You can change the configuration of your Red Hat OpenStack Platform (RHOSP) Cluster API machines by updating values in the Cluster API custom resource manifests.

Important

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.

Sample YAML for configuring RHOSP clusters

The following example YAML files show configurations for a RHOSP cluster.

Sample YAML for a Cluster API machine template resource on RHOSP

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: OpenStackMachineTemplate 
metadata:
  name: <template_name> 
  namespace: openshift-cluster-api
spec:
  template:
    spec: 
      flavor: <openstack_node_machine_flavor> 
      image:
        filter:
          name: <openstack_image>
  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.
  4. Specify the RHOSP flavor to use. For more information, see Creating flavors for launching instances.
  5. Specify the image to use.

Sample YAML for a Cluster API compute machine set resource on RHOSP

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> 
  namespace: openshift-cluster-api
spec:
  clusterName: <cluster_name> 
  replicas: 1
  selector:
    matchLabels:
      test: example
      cluster.x-k8s.io/cluster-name: <cluster_name>
      cluster.x-k8s.io/set-name: <machine_set_name>
  template:
    metadata:
      labels:
        test: example
        cluster.x-k8s.io/cluster-name: <cluster_name>
        cluster.x-k8s.io/set-name: <machine_set_name>
        node-role.kubernetes.io/<role>: ""
    spec:
      bootstrap:
         dataSecretName: worker-user-data 
      clusterName: <cluster_name>
      infrastructureRef:
        apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
        kind: OpenStackMachineTemplate 
        name: <template_name> 
      failureDomain: <nova_availability_zone>
  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. Optional: Specify the name of the Nova availability zone for the machine set to create machines in. If you do not specify a value, machines are not restricted to a specific availability zone.