additional machineset using additional subnet

additional_machineset.yaml

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  annotations:
    machine.openshift.io/memoryMb: "16384"
    machine.openshift.io/vCPU: "4"
  creationTimestamp: "2021-01-28T11:05:49Z"
  generation: 1
  labels:
    machine.openshift.io/cluster-api-cluster: <CLUSTER_NAME>
    machine.openshift.io/cluster-api-machine-role: worker
    machine.openshift.io/cluster-api-machine-type: worker
  name: ostest-p7sj6-worker-0-additional
  namespace: openshift-machine-api
  resourceVersion: "39866"
  selfLink: /apis/machine.openshift.io/v1beta1/namespaces/openshift-machine-api/machinesets/<CLUSTER_NAME>-worker-0
  uid: e1d1d491-b711-4b84-947e-9027041adb53
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <CLUSTER_NAME>
      machine.openshift.io/cluster-api-machineset: <CLUSTER_NAME>-worker-0-additional
  template:
    metadata:
      labels:
        machine.openshift.io/cluster-api-cluster: <CLUSTER_NAME>
        machine.openshift.io/cluster-api-machine-role: worker
        machine.openshift.io/cluster-api-machine-type: worker
        machine.openshift.io/cluster-api-machineset: <CLUSTER_NAME>-worker-0-additional
    spec:
      metadata:
        labels:
          type: additional
      providerSpec:
        value:
          apiVersion: openstackproviderconfig.openshift.io/v1alpha1
          cloudName: openstack
          cloudsSecret:
            name: openstack-cloud-credentials
            namespace: openshift-machine-api
          flavor: m4.xlarge
          image: <CLUSTER_NAME>-rhcos
          kind: OpenstackProviderSpec
          networks:
          - filter: {}
            subnets:
            - filter:
                name: <CLUSTER_NAME>-additional
          securityGroups:
          - filter: {}
            name: <CLUSTER_NAME>-worker-additional
          serverMetadata:
            Name: <CLUSTER_NAME>-worker
            openshiftClusterID: <CLUSTER_NAME>
          tags:
          - openshiftClusterID=<CLUSTER_NAME>
          trunk: true
          userDataSecret:
            name: worker-user-data
          availabilityZone: ''