如何检查集群状态

etcd 集群状态检查指南

任务

先决条件

安装 etcd 和 etcdctl

检查整体状态

使用 endpoint status 检查 --endpoints 标志中指定的每个端点的总体状态：

etcdctl endpoint status (--endpoints=$ENDPOINTS|--cluster)

选项

--cluster[=false]: use all endpoints from the cluster member list

检查健康状况

使用 endpoint health 检查 --endpoints 标志中指定的每个端点的健康状态：

etcdctl endpoint health (--endpoints=$ENDPOINTS|--cluster)

选项

--cluster[=false]: use all endpoints from the cluster member list

检查键值哈希

使用 endpoint hashkv 检查 --endpoints 标志中指定的每个端点的 KV 历史哈希值：

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)

继承自父命令的选项

--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 |
+------------------+------------+---------------+