对k8s demo集群etcd的备份与恢复

最新推荐文章于 2025-04-28 00:00:00 发布

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最新推荐文章于 2025-04-28 00:00:00 发布

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本文链接：https://blog.youkuaiyun.com/qq_37256882/article/details/129898820

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文章详细介绍了如何对Kubernetes(k8s)集群中的Etcd进行备份和恢复操作，包括配置etcdctl、检查etcd状态、创建数据备份、模拟数据丢失以及执行恢复流程。备份过程通过shell脚本和crontab实现自动化，恢复时需按照特定顺序重启kube-apiserver和ETCD服务。

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之前的文章对k8s demo集群进行了CICD，以及监控配置，对于日常运维来说，对k8s集群的控制数据的备份也是必不可少的，所以本文对这个k8s demo集群的etcd进行了备份与恢复的测试演练。

1，配置etcdctl

在/etc/profile增加如下配置
export ETCDCTL_API=3
alias etcdctl='etcdctl --endpoints=https://[127.0.0.1]:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key '

查看etcd的状态数据

[root@VM-12-8-centos ~]# source /etc/profie
#查看状态
[root@VM-12-8-centos ~]# etcdctl endpoint status -w table
+--------------------------+------------------+---------+---------+-----------+-----------+------------+
|         ENDPOINT         |        ID        | VERSION | DB SIZE | IS LEADER | RAFT TERM | RAFT INDEX |
+--------------------------+------------------+---------+---------+-----------+-----------+------------+
| https://[127.0.0.1]:2379 | fc2c7cf28a83253f |  3.3.10 |  5.8 MB |      true |         5 |   22421398 |
+--------------------------+------------------+---------+---------+-----------+-----------+------------+
#健康检查
[root@VM-12-8-centos ~]# etcdctl endpoint health -w table
https://[127.0.0.1]:2379 is healthy: successfully committed proposal: took = 1.073883ms
#etcd集群成员列表
[root@VM-12-8-centos ~]# etcdctl member list -w table         
+------------------+---------+----------------+------------------------+------------------------+
|        ID        | STATUS  |      NAME      |       PEER ADDRS       |      CLIENT ADDRS      |
+------------------+---------+----------------+------------------------+------------------------+
| fc2c7cf28a83253f | started | vm-12-8-centos | https://10.0.12.8:2380 | https://10.0.12.8:2379 |
+------------------

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