Rook Ceph Cluster 생성하기

CephCluster 생성

References

• Rook / CephCluster CRD
• Disk 준비

apiVersion: ceph.rook.io/v1
kind: CephCluster
metadata:
  name: rook-ceph
  namespace: rook-ceph
spec:
  cephVersion:
    image: quay.io/ceph/ceph:v19.2.3
  cleanupPolicy:
    allowUninstallWithVolumes: false
    confirmation: ""
    sanitizeDisks:
      dataSource: zero
      iteration: 1
      method: quick
  dashboard:
    enabled: true
  dataDirHostPath: /var/lib/rook
  disruptionManagement:
    managePodBudgets: true
    osdMaintenanceTimeout: 30
    pgHealthCheckTimeout: 0
  logCollector:
    enabled: true
    maxLogSize: 500M
    periodicity: daily
  mgr:
    count: 2
  mon:
    count: 3
  network:
    hostNetwork: true
  placement:
    all:
      tolerations: []
  priorityClassNames:
    mgr: system-cluster-critical
    mon: system-node-critical
    osd: system-node-critical
  resources:
    cleanup:
      limits:
        memory: 1Gi
      requests:
        memory: 100Mi
    crashcollector:
      limits:
        memory: 60Mi
      requests:
        memory: 60Mi
    exporter:
      limits:
        memory: 128Mi
      requests:
        memory: 50Mi
    logcollector:
      limits:
        memory: 1Gi
      requests:
        memory: 100Mi
    mgr:
      limits:
        memory: 1Gi
      requests:
        memory: 512Mi
    mgr-sidecar:
      limits:
        memory: 100Mi
      requests:
        memory: 40Mi
    mon:
      limits:
        memory: 2Gi
      requests:
        memory: 1Gi
    prepareosd:
      requests:
        memory: 50Mi
  storage:
    nodes:
      - name: ip-192-168-0-11
        devices:
          - name: /dev/vg1/lv1
    useAllDevices: false
    useAllNodes: false

• spec
  • name: <clusterName>: 한 namespace에는 하나의 CephCluster만 생성할 수 있으므로, 일반적으로 namespace와 같은 값을 설정합니다.

cephConfig

References

• Rook / CephCluster CRD # Ceph Config
• Ceph / Configuring Ceph

apiVersion: ceph.rook.io/v1
kind: CephCluster
spec:
  cephConfig:
    <section>:
      <option>: <value>
    # mon:
    #   mon_clock_drift_allowed: "0.1"

cephConfig는 MON이 실행된 후 적용됩니다.

• <section>
  • global, mon, mgr, osd, mds, client 등
  • osd.<osdID>, mon.<monName> 등 특정 Daemon을 지정할 수 있습니다.
  • 옵션이 중복되는 경우 범위가 좁은 것이 적용됩니다. 예를 들어 global, osd, osd.1에 중복 옵션이 있는 경우 osd.1이 적용됩니다.

• kubectl rook-ceph ceph config dump: MON 설정 DB를 출력합니다.
• kubectl rook-ceph ceph config help <option>: 옵션에 대한 도움말을 출력합니다.
• kubectl rook-ceph ceph config get <section> [<option>]: MON 설정 DB나 컴파일 시 결정된 기본 값을 출력합니다.
• kubectl rook-ceph ceph config show <section>: 실행 중인 데몬의 설정을 출력합니다.

CephCluster 삭제

References

• Rook / Cleanup
• Rook / CehpCluster CRD / Cleanup Policy

kubectl patch cephcluster rook-ceph \
    -n rook-ceph \
    --type merge \
    -p '{"spec":{"cleanupPolicy":{"confirmation":"yes-really-destroy-data"}}}'

kubectl delete cephcluster rook-ceph -n rook-ceph

Cluster 운영에 사용된 Node에 접속하여 /var/lib/rook 디렉토리를 정리합니다.

- name: remove /var/lib/rook
  ansible.builtin.file:
    path: /var/lib/rook
    state: absent