etcd集群移除节点
查看当前集群信息
# etcdctl member list --write-out=table
+------------------+---------+--------------------+--------------------------------+-----------------------------------------------------+------------+
| ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER |
+------------------+---------+--------------------+--------------------------------+-----------------------------------------------------+------------+
| 44d8bc3300880bcd | started | sht-sgmhadoopdn- | http://sht-sgmhadoopdn-01:2380 | http://10.0.0.1:2379,http://sht-sgmhadoopdn-01:2379 | false |
| 7796493c3943f891 | started | sht-sgmhadoopdn- | http://sht-sgmhadoopdn-04:2380 | http://10.0.0.1:2379,http://sht-sgmhadoopdn-01:2379 | false |
| d446fbe3296eb85a | started | sht-sgmhadoopdn- | http://sht-sgmhadoopdn-03:2380 | http://10.0.0.1:2379,http://sht-sgmhadoopdn-02:2379 | false |
| e9136c1ad1754783 | started | sht-sgmhadoopdn- | http://sht-sgmhadoopdn-02:2380 | http://10.0.0.1:2379,http://sht-sgmhadoopdn-02:2379 | false |
+------------------+---------+--------------------+--------------------------------+-----------------------------------------------------+------------+ # etcdctl endpoint status --endpoints=http://sht-sgmhadoopdn-01:2379,http://sht-sgmhadoopdn-02:2379,http://sht-sgmhadoopdn-03:2379,http://sht-sgmhadoopdn-04:2379 --write-out=table
+--------------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+--------------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| http://sht-sgmhadoopdn-01:2379 | 44d8bc3300880bcd | 3.4.1 | 16 kB | false | false | 17 | 38 | 38 | |
| http://sht-sgmhadoopdn-02:2379 | e9136c1ad1754783 | 3.4.1 | 16 kB | false | false | 17 | 38 | 38 | |
| http://sht-sgmhadoopdn-03:2379 | d446fbe3296eb85a | 3.4.1 | 16 kB | false | false | 17 | 38 | 38 | |
| http://sht-sgmhadoopdn-04:2379 | 7796493c3943f891 | 3.4.1 | 20 kB | true | false | 17 | 38 | 38 | |
+--------------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ # etcdctl endpoint health --endpoints=http://sht-sgmhadoopdn-01:2379,http://sht-sgmhadoopdn-02:2379,http://sht-sgmhadoopdn-03:2379,http://sht-sgmhadoopdn-04:2379 --write-out=table
+--------------------------------+--------+------------+-------+
| ENDPOINT | HEALTH | TOOK | ERROR |
+--------------------------------+--------+------------+-------+
| http://sht-sgmhadoopdn-04:2379 | true | 5.329583ms | |
| http://sht-sgmhadoopdn-02:2379 | true | 5.943424ms | |
| http://sht-sgmhadoopdn-03:2379 | true | 4.715634ms | |
| http://sht-sgmhadoopdn-01:2379 | true | 6.611197ms | |
+--------------------------------+--------+------------+-------+
将节点sht-sgmhadoopdn-04移除
# etcdctl member remove 7796493c3943f891
Member 7796493c3943f891 removed from cluster 69bef0b9ccf44365
# etcdctl member list --write-out=table
+------------------+---------+--------------------+--------------------------------+-----------------------------------------------------+------------+
| ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER |
+------------------+---------+--------------------+--------------------------------+-----------------------------------------------------+------------+
| 44d8bc3300880bcd | started | sht-sgmhadoopdn- | http://sht-sgmhadoopdn-01:2380 | http://10.0.0.1:2379,http://sht-sgmhadoopdn-01:2379 | false |
| d446fbe3296eb85a | started | sht-sgmhadoopdn- | http://sht-sgmhadoopdn-03:2380 | http://10.0.0.1:2379,http://sht-sgmhadoopdn-02:2379 | false |
| e9136c1ad1754783 | started | sht-sgmhadoopdn- | http://sht-sgmhadoopdn-02:2380 | http://10.0.0.1:2379,http://sht-sgmhadoopdn-02:2379 | false |
+------------------+---------+--------------------+--------------------------------+-----------------------------------------------------+------------+
修改配置文件etcd.conf，修改参数ETCD_INITIAL_CLUSTER并移除节点信息，重启etcd服务
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