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如何检查集群状态
etcd 集群状态检查指南
前提条件
检查整体状态
endpoint status 用于检查 --endpoints 标志中指定的每个端点的整体状态：
etcdctl endpoint status (--endpoints=$ENDPOINTS|--cluster)
选项
--cluster[=false]: use all endpoints from the cluster member list
检查健康状况
endpoint health 用于检查 --endpoints 标志中指定的每个端点的健康状况：
etcdctl endpoint health (--endpoints=$ENDPOINTS|--cluster)
选项
--cluster[=false]: use all endpoints from the cluster member list
检查 KV 哈希
endpoint hashkv 用于检查 --endpoints 标志中指定的每个端点的 KV 历史哈希：
etcdctl endpoint hashkv (--endpoints=$ENDPOINTS|--cluster) [rev=$REV]
选项
--cluster[=false]: use all endpoints from the cluster member list
--rev=0: maximum revision to hash (default: latest revision)
从父命令继承的选项
--endpoints="127.0.0.1:2379": gRPC endpoints
-w, --write-out="simple": set the output format (fields, json, protobuf, simple, table)
示例
etcdctl --write-out=table --endpoints=$ENDPOINTS endpoint status
+------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 10.240.0.17:2379 | 4917a7ab173fabe7 | 3.5.0 | 45 kB | true | false | 4 | 16726 | 16726 | |
| 10.240.0.18:2379 | 59796ba9cd1bcd72 | 3.5.0 | 45 kB | false | false | 4 | 16726 | 16726 | |
| 10.240.0.19:2379 | 94df724b66343e6c | 3.5.0 | 45 kB | false | false | 4 | 16726 | 16726 | |
+------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------|
etcdctl --endpoints=$ENDPOINTS endpoint health
10.240.0.17:2379 is healthy: successfully committed proposal: took = 3.345431ms
10.240.0.19:2379 is healthy: successfully committed proposal: took = 3.767967ms
10.240.0.18:2379 is healthy: successfully committed proposal: took = 4.025451ms
etcdctl --cluster endpoint hashkv --write-out=table
+------------------+------------+---------------+
| ENDPOINT | HASH | HASH REVISION |
+------------------+------------+---------------+
| 10.240.0.17:2379 | 3892279174 | 3 |
| 10.240.0.18:2379 | 3892279174 | 3 |
| 10.240.0.19:2379 | 3892279174 | 3 |
+------------------+------------+---------------+