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| # 前提需要安装etcdctl工具
# https://github.com/etcd-io/etcd/
# 查看etcd集群状态
[root@master1 ~]# etcdctl \
--endpoints master1.xiaowangc.local:2379,master2.xiaowangc.local:2379,master3.xiaowangc.local:2379 \
--cacert /etc/kubernetes/pki/etcd/ca.crt \
--cert /etc/kubernetes/pki/etcd/server.crt \
--key /etc/kubernetes/pki/etcd/server.key \
--write-out=table endpoint status
+------------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+------------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| master1.xiaowangc.local:2379 | 4e2cf6f6c40333c8 | 3.5.5 | 5.2 MB | false | false | 8 | 69635 | 69635 | |
| master2.xiaowangc.local:2379 | 7308778bf3dd1f82 | 3.5.5 | 5.2 MB | true | false | 8 | 69635 | 69635 | |
| master3.xiaowangc.local:2379 | 99148080d033de44 | 3.5.5 | 5.3 MB | false | false | 8 | 69635 | 69635 | |
+------------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
# 查看etcd集群状态
[root@master1 ~]# etcdctl \
--endpoints master1.xiaowangc.local:2379,master2.xiaowangc.local:2379,master3.xiaowangc.local:2379 \
--cacert /etc/kubernetes/pki/etcd/ca.crt \
--cert /etc/kubernetes/pki/etcd/server.crt \
--key /etc/kubernetes/pki/etcd/server.key endpoint health
master3.xiaowangc.local:2379 is healthy: successfully committed proposal: took = 8.169826ms
master2.xiaowangc.local:2379 is healthy: successfully committed proposal: took = 10.849518ms
master1.xiaowangc.local:2379 is healthy: successfully committed proposal: took = 8.282098ms
# 备份命令
[root@master1 ~]# etcdctl \
--endpoints master1.xiaowangc.local:2379 \
--cacert /etc/kubernetes/pki/etcd/ca.crt \
--cert /etc/kubernetes/pki/etcd/server.crt \
--key /etc/kubernetes/pki/etcd/server.key snapshot save my.db
{"level":"info","ts":"2022-11-23T23:44:32.593+0800","caller":"snapshot/v3_snapshot.go:65","msg":"created temporary db file","path":"my.db.part"}
{"level":"info","ts":"2022-11-23T23:44:32.598+0800","logger":"client","caller":"v3@v3.5.6/maintenance.go:212","msg":"opened snapshot stream; downloading"}
{"level":"info","ts":"2022-11-23T23:44:32.598+0800","caller":"snapshot/v3_snapshot.go:73","msg":"fetching snapshot","endpoint":"master1.xiaowangc.local:2379"}
{"level":"info","ts":"2022-11-23T23:44:32.630+0800","logger":"client","caller":"v3@v3.5.6/maintenance.go:220","msg":"completed snapshot read; closing"}
{"level":"info","ts":"2022-11-23T23:44:32.634+0800","caller":"snapshot/v3_snapshot.go:88","msg":"fetched snapshot","endpoint":"master1.xiaowangc.local:2379","size":"5.2 MB","took":"now"}
{"level":"info","ts":"2022-11-23T23:44:32.634+0800","caller":"snapshot/v3_snapshot.go:97","msg":"saved","path":"my.db"}
Snapshot saved at my.db
# 查看备份
[root@master1 ~]# etcdctl \
--endpoints master1.xiaowangc.local:2379 \
--cacert /etc/kubernetes/pki/etcd/ca.crt \
--cert /etc/kubernetes/pki/etcd/server.crt \
--key /etc/kubernetes/pki/etcd/server.key \
--write-out=table snapshot status my.db
Deprecated: Use `etcdutl snapshot status` instead.
+----------+----------+------------+------------+
| HASH | REVISION | TOTAL KEYS | TOTAL SIZE |
+----------+----------+------------+------------+
| 9c4365f3 | 52313 | 1941 | 5.2 MB |
+----------+----------+------------+------------+
[root@master1 etcd_backup]# vi backup.sh
# 简单的备份脚本自行添加到定时任务执行
#/bin/bash
/usr/local/sbin/etcdctl \
--endpoints master1.xiaowangc.local:2379 \
--cacert /etc/kubernetes/pki/etcd/ca.crt \
--cert /etc/kubernetes/pki/etcd/server.crt \
--key /etc/kubernetes/pki/etcd/server.key \
--write-out=table snapshot save /root/etcd_backup/`date +%Y%m%d%H%M`.db
|
