etcd如何去掉壞掉的節點，添加新節點

etcd運行了有一段時間，最近發現etcd報警，發現一臺etcd的容器損壞，但是etcd沒有自動將該節點去除;同時k8s添加了一個節點，但是該節點有加入集群，需要重新添加。

[root@A01-R04-I69-122 ~]# etcdctl --endpoints="http://etcd-xxxl:4001" cluster-health
failed to check the health of member ec292d985b723e4 on http://10.187.27.196:4001: Get http://10.187.27.196:4001/health: dial tcp 10.187.27.196:4001: getsockopt: connection timed out
member ec292d985b723e4 is unreachable: [http://10.187.27.196:4001] are all unreachable
member 2727dc2f519c6794 is healthy: got healthy result from http://10.185.243.35:4001
member 4e56d8229082190f is healthy: got healthy result from http://10.187.24.132:4001
member 5780625be722ce57 is healthy: got healthy result from http://10.187.24.134:4001
member ec2aa2bbe0c891b7 is healthy: got healthy result from http://10.187.27.200:4001

發現 10.187.27.196 損壞，記錄下該節點的id ec292d985b723e4

執行刪除命令：
etcdctl --endpoints="http://etcd-xxxl:4001" member remove ec292d985b723e4
Removed member ec292d985b723e4 from cluster

再次查看，損壞節點已經去掉。

etcdctl --endpoints="http://etcd-xxxxxxx:4001" cluster-health
member 2727dc2f519c6794 is healthy: got healthy result from http://10.185.243.35:4001
member 4e56d8229082190f is healthy: got healthy result from http://10.187.24.132:4001
member 5780625be722ce57 is healthy: got healthy result from http://10.187.24.134:4001
member ec2aa2bbe0c891b7 is healthy: got healthy result from http://10.187.27.200:4001

對于新節點，首先聽到etcd,將目錄刪除，然后重啟，重啟后，就會加入該集群。

另外，我們是通過k8s部署的etcd,其他方式，不適合，另外，極力推薦使用k8s的方式進行部署。