8장.

$ oc patch ControlPlaneMachineSet/cluster -n openshift-machine-api --type json -p ' 

[
    {
      "op": "add",
      "path": "/spec/template/machines_v1beta1_machine_openshift_io/spec/providerSpec/value/additionalBlockDevices", 

      "value": [
        {
          "name": "etcd",
          "sizeGiB": 10,
          "storage": {
            "type": "Local" 

          }
        }
      ]
    }
  ]
'

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 98-var-lib-etcd
spec:
  config:
    ignition:
      version: 3.4.0
    systemd:
      units:
      - contents: |
          [Unit]
          Description=Mount local-etcd to /var/lib/etcd

          [Mount]
          What=/dev/disk/by-label/local-etcd 

          Where=/var/lib/etcd
          Type=xfs
          Options=defaults,prjquota

          [Install]
          WantedBy=local-fs.target
        enabled: true
        name: var-lib-etcd.mount
      - contents: |
          [Unit]
          Description=Create local-etcd filesystem
          DefaultDependencies=no
          After=local-fs-pre.target
          ConditionPathIsSymbolicLink=!/dev/disk/by-label/local-etcd 

          [Service]
          Type=oneshot
          RemainAfterExit=yes
          ExecStart=/bin/bash -c "[ -L /dev/disk/by-label/ephemeral0 ] || ( >&2 echo Ephemeral disk does not exist; /usr/bin/false )"
          ExecStart=/usr/sbin/mkfs.xfs -f -L local-etcd /dev/disk/by-label/ephemeral0 

          [Install]
          RequiredBy=dev-disk-by\x2dlabel-local\x2detcd.device
        enabled: true
        name: create-local-etcd.service
      - contents: |
          [Unit]
          Description=Migrate existing data to local etcd
          After=var-lib-etcd.mount
          Before=crio.service 

          Requisite=var-lib-etcd.mount
          ConditionPathExists=!/var/lib/etcd/member
          ConditionPathIsDirectory=/sysroot/ostree/deploy/rhcos/var/lib/etcd/member 

          [Service]
          Type=oneshot
          RemainAfterExit=yes

          ExecStart=/bin/bash -c "if [ -d /var/lib/etcd/member.migrate ]; then rm -rf /var/lib/etcd/member.migrate; fi" 

          ExecStart=/usr/bin/cp -aZ /sysroot/ostree/deploy/rhcos/var/lib/etcd/member/ /var/lib/etcd/member.migrate
          ExecStart=/usr/bin/mv /var/lib/etcd/member.migrate /var/lib/etcd/member 

          [Install]
          RequiredBy=var-lib-etcd.mount
        enabled: true
        name: migrate-to-local-etcd.service
      - contents: |
          [Unit]
          Description=Relabel /var/lib/etcd

          After=migrate-to-local-etcd.service
          Before=crio.service

          [Service]
          Type=oneshot
          RemainAfterExit=yes

          ExecCondition=/bin/bash -c "[ -n \"$(restorecon -nv /var/lib/etcd)\" ]" 

          ExecStart=/usr/sbin/restorecon -R /var/lib/etcd

          [Install]
          RequiredBy=var-lib-etcd.mount
        enabled: true
        name: relabel-var-lib-etcd.service