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2.4. Creating a compute machine set on Google Cloud

You can create a different compute machine set to serve a specific purpose in your OpenShift Container Platform cluster on Google Cloud. For example, you might create infrastructure machine sets and related machines so that you can move supporting workloads to the new machines.

중요

You can use the advanced machine management and scaling capabilities only in clusters where the Machine API is operational. Clusters with user-provisioned infrastructure require additional validation and configuration to use the Machine API.

Clusters with the infrastructure platform type none cannot use the Machine API. This limitation applies even if the compute machines that are attached to the cluster are installed on a platform that supports the feature. This parameter cannot be changed after installation.

To view the platform type for your cluster, run the following command: 

$ oc get infrastructure cluster -o jsonpath='{.status.platform}'

2.4.1. Sample YAML for a compute machine set custom resource on Google Cloud
링크 복사

The sample YAML defines a compute machine set for Google Cloud, enabling the automated provisioning of nodes within a specific VPC. When you apply this configuration by using the OpenShift Container Platform CLI, you can ensure consistent scaling, scheduling, and infrastructure ID labeling for compute resources in your cluster.

The sample YAML defines a compute machine set that runs in Google Cloud and creates nodes that are labeled with node-role.kubernetes.io/<role>: "", where <role> is the node label to add.

2.4.1.1. Values obtained by using the OpenShift CLI
링크 복사

In the following example, you can obtain some of the values for your cluster by using the OpenShift Container Platform CLI.

Infrastructure ID

The <infrastructure_id> string is the infrastructure ID that is based on the cluster ID that you set when you provisioned the cluster. If you have the OpenShift CLI installed, you can obtain the infrastructure ID by running the following command: 

$ oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructure cluster
Image path

The <path_to_image> string is the path to the image that was used to create the disk. If you have the OpenShift CLI installed, you can obtain the path to the image by running the following command: 

$ oc -n openshift-machine-api \
  -o jsonpath='{.spec.template.spec.providerSpec.value.disks[0].image}{"\n"}' \
  get machineset/<infrastructure_id>-worker-a

Sample Google Cloud MachineSet values

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructure_id>
  name: <infrastructure_id>-w-a
  namespace: openshift-machine-api
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructure_id>
      machine.openshift.io/cluster-api-machineset: <infrastructure_id>-w-a
  template:
    metadata:
      creationTimestamp: null
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructure_id>
        machine.openshift.io/cluster-api-machine-role: <role>
        machine.openshift.io/cluster-api-machine-type: <role>
        machine.openshift.io/cluster-api-machineset: <infrastructure_id>-w-a
    spec:
      metadata:
        labels:
          node-role.kubernetes.io/<role>: ""
      providerSpec:
        value:
          apiVersion: machine.openshift.io/v1beta1
          canIPForward: false
          credentialsSecret:
            name: gcp-cloud-credentials
          deletionProtection: false
          disks:
          - autoDelete: true
            boot: true
            image: <path_to_image>
            labels: null
            sizeGb: 128
            type: pd-ssd
          gcpMetadata:
          - key: <custom_metadata_key>
            value: <custom_metadata_value>
          kind: GCPMachineProviderSpec
          machineType: n1-standard-4
          metadata:
            creationTimestamp: null
          networkInterfaces:
          - network: <infrastructure_id>-network
            subnetwork: <infrastructure_id>-worker-subnet
          projectID: <project_name>
          region: us-central1
          serviceAccounts:
          - email: <infrastructure_id>-w@<project_name>.iam.gserviceaccount.com
            scopes:
            - https://www.googleapis.com/auth/cloud-platform
          tags:
            - <infrastructure_id>-worker
          userDataSecret:
            name: worker-user-data
          zone: us-central1-a

where:

<infrastructure_id>
Specifies the infrastructure ID that is based on the cluster ID that you set when you provisioned the cluster.
<role>
Specifies the node label to add.
<path_to_image>

Specifies the path to the image that is used in current compute machine sets. To use a Google Cloud Marketplace image, specify the offer to use:

  • OpenShift Container Platform: https://www.googleapis.com/compute/v1/projects/redhat-marketplace-public/global/images/redhat-coreos-ocp-413-x86-64-202305021736
  • OpenShift Platform Plus: https://www.googleapis.com/compute/v1/projects/redhat-marketplace-public/global/images/redhat-coreos-opp-413-x86-64-202305021736
  • OpenShift Kubernetes Engine: https://www.googleapis.com/compute/v1/projects/redhat-marketplace-public/global/images/redhat-coreos-oke-413-x86-64-202305021736
<gcpMetadata>
Optional: Specifies the custom metadata in the form of a key:value pair. For example use cases, see the Google Cloud documentation for setting custom metadata.
<project_name>
Specifies the name of the Google Cloud project that you use for your cluster.
<serviceAccounts>
Specifies a single service account. Multiple service accounts are not supported.
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