kubernetes集群编排——etcd

备份

从镜像中拷贝etcdctl二进制命令

[root@k8s1 ~]# docker run -it --rm reg.westos.org/k8s/etcd:3.5.6-0 sh

输入ctrl+pq快捷键，把容器打入后台

获取容器id

[root@k8s1 ~]# docker ps

从容器拷贝命令到本机

docker container cp c7e28b381f07:/usr/local/bin/etcdctl /usr/local/bin

[root@k8s1 ~]# which etcdctl

删除容器

[root@k8s1 ~]# docker rm -f c7e28b381f07

备份

[root@k8s1 ~]# ETCDCTL_API=3 etcdctl --endpoints 192.168.92.12:2379 --cert=/root/etcd/server.crt --key=/root/etcd/server.key --cacert=/root/etcd/ca.crt  snapshot save /root/etcd/snapshotdb

查看快照状态

[root@k8s1 ~]# ETCDCTL_API=3 etcdctl --endpoints 192.168.92.12:2379 --cert=/root/etcd/server.crt --key=/root/etcd/server.key --cacert=/root/etcd/ca.crt --write-out=table snapshot status /root/etcd/snapshotdb

删除集群资源

[root@k8s2 helm]# helm uninstall myapp

[root@k8s2 helm]# kubectl get pod

恢复

停止所有核心组件

[root@k8s2 pki]# cd /etc/kubernetes/manifests/

[root@k8s2 manifests]# ls

[root@k8s2 manifests]# mv * /mnt/

移除yaml文件后对应容器自动停止

[root@k8s2 manifests]# crictl ps

从快照恢复

[root@k8s2 manifests]# cd /var/lib/etcd/

[root@k8s2 etcd]# ls

[root@k8s2 etcd]# mv  member/ /tmp/

[root@k8s2 etcd]# ETCDCTL_API=3 etcdctl snapshot restore --data-dir /var/lib/etcd/ /tmp/snapshotdb


[root@k8s2 etcd]# ls

重启所有组件

[root@k8s2 etcd]# cd /etc/kubernetes/manifests/

[root@k8s2 manifests]# mv /mnt/* .

yaml文件移动回来后容器自动启动

[root@k8s2 manifests]# crictl ps

所有集群节点重启kubelet服务

[root@k8s2 manifests]# reboot

[root@k8s3 ~]# reboot

[root@k8s4 ~]# reboot

看到pod恢复表示成功

[root@k8s2 ~]# kubectl get pod