Kubernetes中使用CronJob定時備份etcd集羣數據

時間 2019-11-09

標籤 kubernetes 使用 cronjob 定時備份 etcd 集羣數據欄目負載均衡简体版

原文原文鏈接

Kubernetes中使用CronJob定時備份etcd集羣數據

注意：這裏的內容已通過時！
- 使用kubernetes1.12.3和etcd3.2.24請參考 Kubernetes的etcd探祕-狀態數據備份。

kubernetes中部署的應用的信息都存放在etcd裏面，這裏面的數據很是重要，須要備份，以備不時之需。html

這裏使用k8s提供的定時任務來執行備份任務，定時任務的pod要和etcd的pod要在同一個node上面（使用nodeAffinity）。node

要求

kubernetes 1.6
etcd 3.0.17

yaml文件

apiVersion: batch/v2alpha1
kind: CronJob
metadata:
  name: etcd-disaster-recovery
  namespace: cron
spec:
 schedule: "0 22 * * *"
 jobTemplate:
  spec:
    template:
      metadata:
       labels:
        app: etcd-disaster-recovery
      spec:
        affinity:
          nodeAffinity:
            requiredDuringSchedulingIgnoredDuringExecution:
                  nodeSelectorTerms:
                  - matchExpressions:
                    - key: kubernetes.io/role
                      operator: In
                      values:
                      - master
        containers:
        - name: etcd
          image: coreos/etcd:v3.0.17
          command:
          - sh
          - -c
          - "export ETCDCTL_API=3; \
             etcdctl --endpoints $ENDPOINT snapshot save /snapshot/$(date +%Y%m%d_%H%M%S)_snapshot.db; \
             echo etcd backup sucess"
          env:
          - name: ENDPOINT
            value: "127.0.0.1:2379"
          volumeMounts:
            - mountPath: "/snapshot"
              name: snapshot
              subPath: data/etcd-snapshot
            - mountPath: /etc/localtime
              name: lt-config
            - mountPath: /etc/timezone
              name: tz-config
        restartPolicy: OnFailure
        volumes:
          - name: snapshot
            persistentVolumeClaim:
              claimName: cron-nas
          - name: lt-config
            hostPath:
              path: /etc/localtime
          - name: tz-config
            hostPath:
              path: /etc/timezone
        hostNetwork: true