> For the complete documentation index, see [llms.txt](https://close.gitbook.io/yun-wei-bi-ji/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://close.gitbook.io/yun-wei-bi-ji/kubernetes/etcd/cronjob-zi-yuan-kong-zhi-qi-jin-xing-ding-shi-bei-fen.md).
# CronJob资源控制器进行定时备份
### **CronJob资源控制器进行定时备份**
> 这里设置了三个 etcd 地址来进行备份，逻辑上只备份一个地址上的数据即可，如果后期出 etcd 数据不一样的情况，可使用同时间段 key 最多的那个备份恢复
```bash
cat > etcd-database-backup.yaml <<'EOF'
apiVersion: batch/v1
kind: CronJob
metadata:
name: etcd-database-backup
annotations:
descript: "etcd数据库定时备份"
spec:
schedule: "*/5 * * * *" # 表示每5分钟运行一次
jobTemplate:
spec:
template:
spec:
containers:
- name: etcdctl
image: registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.5.5-0
env:
- name: ETCDCTL_API
value: "3"
- name: ETCDCTL_CACERT
value: "/data/kube/ssl/ca.pem"
- name: ETCDCTL_CERT
value: "/data/kube/ssl/etcd.pem"
- name: ETCDCTL_KEY
value: "/data/kube/ssl/etcd-key.pem"
command:
- /bin/sh
- -c
- |
export RAND=$RANDOM
etcdctl --endpoints=https://192.168.182.129:2379 snapshot save /backup/etcd-129-${RAND}-snapshot.db
etcdctl --endpoints=https://192.168.182.130:2379 snapshot save /backup/etcd-130-${RAND}-snapshot.db
etcdctl --endpoints=https://192.168.182.132:2379 snapshot save /backup/etcd-132-${RAND}-snapshot.db
volumeMounts:
- name: "pki"
mountPath: "/data/kube/ssl"
- name: "backup"
mountPath: "/backup"
imagePullPolicy: IfNotPresent
volumes:
- name: "pki"
hostPath:
path: "/data/kube/ssl"
type: "DirectoryOrCreate"
- name: "backup"
hostPath:
path: "/data/kube/backups" # 数据备份目录
type: "DirectoryOrCreate"
nodeSelector: # 将Pod绑定在主节点之中，否则只能将相关证书放在各个节点能访问的nfs共享存储中,如果固定某一個master节点，那需要多筛选器结合
node-role.kubernetes.io/master: ""
tolerations: # 容忍度
- key: "node-role.kubernetes.io/master"
operator: "Exists"
effect: "NoSchedule" # operator: "Exists" , 忽略 effect 值
restartPolicy: Never
EOF
```
### **创建cronjob资源清单:**
```bash
kubectl apply -f etcd-database-backup.yaml
```
### **查看詳情**
```bash
kubectl logs -f pod/etcd-database-backup-xxxx-xxx
```
