Red Hat Summit Red Hat Summit지원콘솔개발자평가판 시작연락처

5장.

5.1.

중요

5.1.1.

중요

  • 작은 정보

  1. $ oc debug --as-root node/<node_name>

  2. sh-4.4# chroot /host

  3. $ export HTTP_PROXY=http://<your_proxy.example.com>:8080
    $ export HTTPS_PROXY=https://<your_proxy.example.com>:8080
    $ export NO_PROXY=<example.com>

  4. 작은 정보

    sh-4.4# /usr/local/bin/cluster-backup.sh /home/core/assets/backup

    found latest kube-apiserver: /etc/kubernetes/static-pod-resources/kube-apiserver-pod-6
found latest kube-controller-manager: /etc/kubernetes/static-pod-resources/kube-controller-manager-pod-7
found latest kube-scheduler: /etc/kubernetes/static-pod-resources/kube-scheduler-pod-6
found latest etcd: /etc/kubernetes/static-pod-resources/etcd-pod-3
ede95fe6b88b87ba86a03c15e669fb4aa5bf0991c180d3c6895ce72eaade54a1
etcdctl version: 3.4.14
API version: 3.4
{"level":"info","ts":1624647639.0188997,"caller":"snapshot/v3_snapshot.go:119","msg":"created temporary db file","path":"/home/core/assets/backup/snapshot_2021-06-25_190035.db.part"}
{"level":"info","ts":"2021-06-25T19:00:39.030Z","caller":"clientv3/maintenance.go:200","msg":"opened snapshot stream; downloading"}
{"level":"info","ts":1624647639.0301006,"caller":"snapshot/v3_snapshot.go:127","msg":"fetching snapshot","endpoint":"https://10.0.0.5:2379"}
{"level":"info","ts":"2021-06-25T19:00:40.215Z","caller":"clientv3/maintenance.go:208","msg":"completed snapshot read; closing"}
{"level":"info","ts":1624647640.6032252,"caller":"snapshot/v3_snapshot.go:142","msg":"fetched snapshot","endpoint":"https://10.0.0.5:2379","size":"114 MB","took":1.584090459}
{"level":"info","ts":1624647640.6047094,"caller":"snapshot/v3_snapshot.go:152","msg":"saved","path":"/home/core/assets/backup/snapshot_2021-06-25_190035.db"}
Snapshot saved at /home/core/assets/backup/snapshot_2021-06-25_190035.db
{"hash":3866667823,"revision":31407,"totalKey":12828,"totalSize":114446336}
snapshot db and kube resources are successfully saved to /home/core/assets/backup

    • 참고

5.1.2.

5.1.3.

중요

주의

  1. apiVersion: config.openshift.io/v1
kind: FeatureGate
metadata:
  name: cluster
spec:
  featureSet: TechPreviewNoUpgrade

  2. $ oc apply -f enable-tech-preview-no-upgrade.yaml

  3. $ oc get crd | grep backup

    backups.config.openshift.io 2023-10-25T13:32:43Z
etcdbackups.operator.openshift.io 2023-10-25T13:32:04Z

5.1.3.1. 

    1. kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: etcd-backup-pvc
  namespace: openshift-etcd
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 200Gi 1
  volumeMode: Filesystem
      1 

    2. $ oc apply -f etcd-backup-pvc.yaml

    3. $ oc get pvc

      NAME              STATUS    VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
etcd-backup-pvc   Bound                                                       51s

      참고

    4. apiVersion: operator.openshift.io/v1alpha1
kind: EtcdBackup
metadata:
  name: etcd-single-backup
  namespace: openshift-etcd
spec:
  pvcName: etcd-backup-pvc 1
      1 

    5. $ oc apply -f etcd-single-backup.yaml

    1. apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: etcd-backup-local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: Immediate

    2. $ oc apply -f etcd-backup-local-storage.yaml

    3. apiVersion: v1
kind: PersistentVolume
metadata:
  name: etcd-backup-pv-fs
spec:
  capacity:
    storage: 100Gi 1
  volumeMode: Filesystem
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: etcd-backup-local-storage
  local:
    path: /mnt
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
      - key: kubernetes.io/hostname
         operator: In
         values:
         - <example_master_node> 2
      1
      2 

    4. $ oc get pv

      NAME                    CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS                REASON   AGE
etcd-backup-pv-fs       100Gi      RWO            Retain           Available           etcd-backup-local-storage            10s

    5. kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: etcd-backup-pvc
  namespace: openshift-etcd
spec:
  accessModes:
  - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 10Gi 1
      1 

    6. $ oc apply -f etcd-backup-pvc.yaml

    7. apiVersion: operator.openshift.io/v1alpha1
kind: EtcdBackup
metadata:
  name: etcd-single-backup
  namespace: openshift-etcd
spec:
  pvcName: etcd-backup-pvc 1
      1 

    8. $ oc apply -f etcd-single-backup.yaml

5.1.3.2. 

    1. kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: etcd-backup-pvc
  namespace: openshift-etcd
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 200Gi 1
  volumeMode: Filesystem
  storageClassName: etcd-backup-local-storage
      1
      참고

         

      		 

    2. $ oc apply -f etcd-backup-pvc.yaml

    3. $ oc get pvc

      NAME              STATUS    VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
etcd-backup-pvc   Bound                                                       51s

      참고

  2. 주의

    1. apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: etcd-backup-local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: Immediate

    2. $ oc apply -f etcd-backup-local-storage.yaml

    3. apiVersion: v1
kind: PersistentVolume
metadata:
  name: etcd-backup-pv-fs
spec:
  capacity:
    storage: 100Gi 1
  volumeMode: Filesystem
  accessModes:
  - ReadWriteMany
  persistentVolumeReclaimPolicy: Delete
  storageClassName: etcd-backup-local-storage
  local:
    path: /mnt/
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - <example_master_node> 2
      1
      2
      작은 정보

      $ oc get nodes

    4. $ oc get pv

      NAME                    CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS                REASON   AGE
etcd-backup-pv-fs       100Gi      RWX            Delete           Available           etcd-backup-local-storage            10s

    5. kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: etcd-backup-pvc
spec:
  accessModes:
  - ReadWriteMany
  volumeMode: Filesystem
  resources:
    requests:
      storage: 10Gi 1
  storageClassName: etcd-backup-local-storage
      1 

    6. $ oc apply -f etcd-backup-pvc.yaml

  3. apiVersion: config.openshift.io/v1alpha1
kind: Backup
metadata:
  name: etcd-recurring-backup
spec:
  etcd:
    schedule: "20 4 * * *" 1
    timeZone: "UTC"
    pvcName: etcd-backup-pvc
    1 

    spec:
  etcd:
    retentionPolicy:
      retentionType: RetentionNumber 1
      retentionNumber:
        maxNumberOfBackups: 5 2
    1
    2
    주의

    spec:
  etcd:
    retentionPolicy:
      retentionType: RetentionSize
      retentionSize:
        maxSizeOfBackupsGb: 20 1
    1
    주의

  4. $ oc create -f etcd-recurring-backup.yaml

  5. $ oc get cronjob -n openshift-etcd
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