查看集群中存在的节点
$ etcdctl member list
8e9e05c52164694d: name=dev-master-01 peerURLs=http://localhost:2380 clientURLs=http://localhost:2379 isLeader=true
删除集群中存在的节点
$ etcdctl member remove 8e9e05c52164694d
Removed member 8e9e05c52164694d from cluster
向集群中新加节点
$ etcdctl member add etcd3 http://192.168.1.100:2380
Added member named etcd3 with ID 8e9e05c52164694d to cluster