ETCD常用操作

发表评论
1174 views

拷贝etcdctl命令行工具

$ docker cp etcd_container:/usr/local/bin/etcdctl /usr/bin/etcdctl

查看etcd集群的成员节点

$ export ETCDCTL_API=3
$ etcdctl --endpoints=https://[127.0.0.1]:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/healthcheck-client.crt --key=/etc/kubernetes/pki/etcd/healthcheck-client.key member list -w table

$ alias etcdctl='etcdctl --endpoints=https://[127.0.0.1]:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/healthcheck-client.crt --key=/etc/kubernetes/pki/etcd/healthcheck-client.key'

$ etcdctl member list -w table

查看etcd集群节点状态

$ etcdctl endpoint status -w table

$ etcdctl endpoint health -w table

设置key值

$ etcdctl put luffy 1
$ etcdctl get luffy

查看所有key值

$  etcdctl get / --prefix --keys-only

查看具体的key对应的数据

$ etcdctl get /registry/pods/jenkins/sonar-postgres-7fc5d748b6-gtmsb

list-watch:

$ etcdctl watch /luffy/ --prefix
$ etcdctl put /luffy/key1 val1

添加定时任务做数据快照（重要！）

$ etcdctl snapshot save `hostname`-etcd_`date +%Y%m%d%H%M`.db

恢复快照：

  1. 停止etcd和apiserver

  2. 移走当前数据目录

$ mv /var/lib/etcd/ /tmp
  1. 恢复快照
$ etcdctl snapshot restore `hostname`-etcd_`date +%Y%m%d%H%M`.db --data-dir=/var/lib/etcd/

  1. 集群恢复 https://github.com/etcd-io/etcd/blob/release-3.3/Documentation/op-guide/recovery.md

  2. namespace删除问题

很多情况下，会出现namespace删除卡住的问题，此时可以通过操作etcd来删除数据：