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Creating a Windows machine set on Azure

You can use a MachineSet custom resource (CR) to add a Windows compute node to your Microsoft Azure cluster, where you can run Windows container workloads.

For example, you might create infrastructure Windows machine sets and related machines so that you can move supporting Windows workloads to the new Windows machines. For more information about machine sets, see "Overview of machine management" in the Additional resources section.

Prerequisites

  • You installed the Windows Machine Config Operator (WMCO) using Operator Lifecycle Manager (OLM).

  • You are using a supported Windows Server as the operating system image.

Sample YAML for a Windows MachineSet object on Azure

You can add Windows nodes to an Microsoft Azure cluster by defining a Windows MachineSet object that the Windows Machine Config Operator (WMCO) can react upon.

The following example is a YAML file for creating a MachineSet object for Azure.

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructure_id>
  name: <windows_machine_set_name>
  namespace: openshift-machine-api
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructure_id>
      machine.openshift.io/cluster-api-machineset: <windows_machine_set_name>
  template:
    metadata:
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructure_id>
        machine.openshift.io/cluster-api-machine-role: worker
        machine.openshift.io/cluster-api-machine-type: worker
        machine.openshift.io/cluster-api-machineset: <windows_machine_set_name>
        machine.openshift.io/os-id: Windows
    spec:
      metadata:
        labels:
          node-role.kubernetes.io/worker: ""
      providerSpec:
        value:
          apiVersion: azureproviderconfig.openshift.io/v1beta1
          credentialsSecret:
            name: azure-cloud-credentials
            namespace: openshift-machine-api
          image:
            offer: WindowsServer
            publisher: MicrosoftWindowsServer
            resourceID: ""
            sku: 2022-datacenter
            version: latest
          kind: AzureMachineProviderSpec
          location: <location>
          networkResourceGroup: <infrastructure_id>-rg
          osDisk:
            diskSizeGB: 128
            managedDisk:
              storageAccountType: Premium_LRS
            osType: Windows
          publicIP: false
          resourceGroup: <infrastructure_id>-rg
          subnet: <infrastructure_id>-worker-subnet
          userDataSecret:
            name: windows-user-data
            namespace: openshift-machine-api
          vmSize: Standard_D2s_v3
          vnet: <infrastructure_id>-vnet
          zone: "<zone>"

where:

metadata.labels

For the machine.openshift.io/cluster-api-cluster label, replace <infrastructure_id> with the infrastructure ID that is based on the cluster ID that you set when you provisioned the cluster. You can obtain the infrastructure ID by running the following command:

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

Replace <windows_machine_set_name> with the Windows compute machine set name. Windows machine names on Azure cannot be more than 15 characters long. Therefore, the compute machine set name cannot be more than 9 characters long, due to the way machine names are generated from it.

spec.selector.matchLabels

Replace the parameters for the following labels:

  • machine.openshift.io/cluster-api-cluster. Replace the infrastructure ID.

  • machine.openshift.io/cluster-api-machineset. Replace the Windows compute machine set name.

spec.template.metadata.labels

Replace the parameters for the following labels:

  • machine.openshift.io/cluster-api-cluster. Replace the infrastructure ID.

  • machine.openshift.io/cluster-api-machineset. Replace the Windows compute machine set name.

  • machine.openshift.io/os-id: Windows. When set to Windows, configures the compute machine set as a Windows machine.

spec.template.spec.metadata.labels

When set to node-role.kubernetes.io/worker, configures the node as a compute machine.

spec.template.spec.providerSpec

Specify the following parameters:

  • value.image. Specifies a WindowsServer image offering that defines the 2022-datacenter SKU.

  • value.location. Specifies the Azure region, such as centralus.

  • value.networkResourceGroup. Replace the infrastructure ID.

  • value.resourceGroup. Replace the infrastructure ID.

  • value.userDataSecret.name. Specifies the name of the secret in the user data YAML file that is in the openshift-machine-api namespace. Use the value that installation program populates in the default compute machine set.

  • value.zone. Specifies the zone within your region to place machines on. Be sure that your region supports the zone that you specify.

Creating a compute machine set

To dynamically manage machine compute resources, you can create your own compute machine sets in addition to the compute machine sets created by the installation program. Use the OKD CLI to automate node provisioning.

Prerequisites

  • Deploy an OKD cluster.

  • Install the OpenShift CLI (oc).

  • Log in to oc as a user with cluster-admin permission.

  • In disconnected environments, the image specified in the MachineSet custom resource (CR) must have the OpenSSH server v0.0.1.0 installed.

Procedure

  1. Create a new YAML file that contains the compute machine set custom resource (CR) sample and is named <file_name>.yaml.

    Ensure that you set the <clusterID> and <role> parameter values.

  2. Optional: If you are not sure which value to set for a specific field, you can check an existing compute machine set from your cluster.

    1. To list the compute machine sets in your cluster, run the following command:

      $ oc get machinesets -n openshift-machine-api

      The following is example output:

      NAME                                DESIRED   CURRENT   READY   AVAILABLE   AGE
agl030519-vplxk-worker-us-east-1a   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1b   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1c   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1d   0         0                             55m
agl030519-vplxk-worker-us-east-1e   0         0                             55m
agl030519-vplxk-worker-us-east-1f   0         0                             55m

    2. To view values of a specific compute machine set custom resource (CR), run the following command:

      $ oc get machineset <machineset_name> \
  -n openshift-machine-api -o yaml

      The following is example output:

      apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructure_id>
  name: <infrastructure_id>-<role>
  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>-<role>
  template:
    metadata:
      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>-<role>
    spec:
      providerSpec:
        ...

      where:

      metadata.labels.machine.openshift.io/cluster-api-cluster

      Specifies the cluster infrastructure ID.

      metadata.labels.name

      Specifies a default node label.

      For clusters that have user-provisioned infrastructure, a compute machine set can only create worker and infra type machines.
      spec.template.metadata.spec.providerSpec

      Specifies the values of the compute machine set CR. The values are platform-specific. For more information about <providerSpec> parameters in the CR, see the sample compute machine set CR configuration for your provider.

  3. Create a MachineSet CR by running the following command:

    $ oc create -f <file_name>.yaml
Verification

  • View the list of compute machine sets by running the following command:

    $ oc get machineset -n openshift-machine-api

    The following is example output:

    NAME                                       DESIRED   CURRENT   READY   AVAILABLE   AGE
agl030519-vplxk-windows-worker-us-east-1a  1         1         1       1           11m
agl030519-vplxk-worker-us-east-1a          1         1         1       1           55m
agl030519-vplxk-worker-us-east-1b          1         1         1       1           55m
agl030519-vplxk-worker-us-east-1c          1         1         1       1           55m
agl030519-vplxk-worker-us-east-1d          0         0                             55m
agl030519-vplxk-worker-us-east-1e          0         0                             55m
agl030519-vplxk-worker-us-east-1f          0         0                             55m

    When the new compute machine set is available, the DESIRED and CURRENT values match. If the compute machine set is not available, wait a few minutes and run the command again.

Additional resources