ETCD状态检查以及碎片压缩

在安装了etcd 3.10版本之后,使用etcdctl和etcd交互时需要将api版本设置为3, 默认,为了向后兼容 etcdctl 使用 v2 API 来和 etcd 服务器通讯。为了让 etcdctl 使用 v3 API 来和etcd通讯,API 版本必须通过环境变量 ETCDCTL_API 设置为版本3
export ETCDCTL_API=3

查看ETCD版本方法

etcd --version
#返回
etcd Version: 3.4.13
Git SHA: ae9734ed2
Go Version: go1.12.17
Go OS/Arch: linux/amd64

查看 etcd所有存储节点的集群状态

etcdctl --write-out=table member list --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key --cacert=/etc/kubernetes/pki/etcd/ca.crt
+------------------+---------+-----------------+------------------------------+------------------------------+------------+
|        ID        | STATUS  |      NAME       |          PEER ADDRS          |         CLIENT ADDRS         | IS LEARNER |
+------------------+---------+-----------------+------------------------------+------------------------------+------------+
| 42d99f3f857a5b15 | started | 172.168.102.119 | https://172.168.102.119:2380 | https://172.168.102.119:2379 |      false |
| 5e5770766d40c343 | started | 172.168.102.120 | https://172.168.102.120:2380 | https://172.168.102.120:2379 |      false |
| 91f48965ce76fb52 | started | 172.168.102.118 | https://172.168.102.118:2380 | https://172.168.102.118:2379 |      false |
+------------------+---------+-----------------+------------------------------+------------------------------+------------+
查看etcd集群中的leader
etcdctl --write-out=table endpoint status --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key --cacert=/etc/kubernetes/pki/etcd/ca.crt
+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|    ENDPOINT    |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 127.0.0.1:2379 | 91f48965ce76fb52 |   3.4.7 |  361 MB |     false |      false |      6480 |   34152053 |           34152053 |        |
+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
#查看etcd成员的健康状况
etcdctl --write-out=table endpoint health --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key --cacert=/etc/kubernetes/pki/etcd/ca.crt
+----------------+--------+-------------+-------+
|    ENDPOINT    | HEALTH |    TOOK     | ERROR |
+----------------+--------+-------------+-------+
| 127.0.0.1:2379 |   true | 28.632652ms |       |
+----------------+--------+-------------+-------+
查看所有etcd节点状态
export ETCDCTL_API=3 
export ENDPOINTS=10.24.21.89:2379,10.24.21.90:2379,10.24.21.91:2379   
etcdctl --write-out=table --endpoints=$ENDPOINTS endpoint status --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key --cacert=/etc/kubernetes/pki/etcd/ca.crt
etcd压缩碎片整理

查看etcd数据较大的目录

etcdctl  --endpoints=$ENDPOINTS --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key --cacert=/etc/kubernetes/pki/etcd/ca.crt get /registry --keys-only --prefix|grep -v '^#' >/tmp/key.txt
#etcd数据列表并排序
cat /tmp/key.txt |awk -F '[/]' '{print $2"/"$3"/"$4}'|uniq -c|sort -rn|head
#获取当前KV的版本
export ETCDCTL_API=3 
rev=$(etcdctl --cacert /etc/kubernetes/pki/etcd/ca.crt    --cert /etc/kubernetes/pki/etcd/peer.crt   --key /etc/kubernetes/pki/etcd/peer.key  --endpoints=https://127.0.0.1:2379 endpoint status --write-out="json" | egrep -o '"revision":[0-9]*' | egrep -o '[0-9].*')
#压缩掉所有旧版本KV,注意压缩旧版本不会释放磁盘空间到操作系统,磁盘空间仍被etcd占用
etcdctl --cacert /etc/kubernetes/pki/etcd/ca.crt    --cert /etc/kubernetes/pki/etcd/peer.crt   --key /etc/kubernetes/pki/etcd/peer.key  --endpoints=https://127.0.0.1:2379 compact $rev
整理多余的空间,释放磁盘空间到操作系统
etcdctl  --cacert /etc/kubernetes/pki/etcd/ca.crt    --cert /etc/kubernetes/pki/etcd/peer.crt   --key /etc/kubernetes/pki/etcd/peer.key --endpoints=$ENDPOINTS defrag --command-timeout=30s
#删除指定的数据
etcdctl --endpoints=$ENDPOINTS --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key del --prefix "/registry/events"

#查看etcd配置中各个配置的条目数量
ETCDCTL_API=3 etcdctl --endpoints=$ENDPOINTS --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key
 get  /   --prefix   --keys-only   --command-timeout=20s  |   awk -F/ '{print $3}' | sort -n | uniq -c




内容版权声明:除非注明,否则皆为本站原创文章。

转载注明出处:https://sulao.cn/post/838.html

我要评论

◎欢迎参与讨论,请在这里发表您的看法、交流您的观点。