etcd怎么查询哪个节点是leader?

啊啊 发表于: 2021-04-20   最后更新时间: 2021-04-20 10:13:38   125 游览

etcd 3.1.9版本,使用。

etcdcrt member list.

可以看到 isLeader=falseisLeader=true

etcd -version
etcd Version: 3.1.9
Git SHA: 0f4a535
Go Version: go1.7.4
Go OS/Arch: linux/amd64

etcdctl member list
29cae73abe8480e0: name=infra3 peerURLs=http://192.168.2.188:2380 clientURLs=http://192.168.2.188:2379 isLeader=false
ddfd1a6f3be67384: name=infra1 peerURLs=http://192.168.2.186:2380 clientURLs=http://192.168.2.186:2379 isLeader=true
fd49f5e3ec73b0d2: name=infra2 peerURLs=http://192.168.2.187:2380 clientURLs=http://192.168.2.187:2379 isLeader=false

etcd 3.2.x3.3.1 版本没有显示这个。

那么我怎么知道哪个是leader呢?

etcd --version
etcd Version: 3.3.1
Git SHA: 28f3f26
Go Version: go1.9.4
Go OS/Arch: linux/amd64

etcdctl member list
1114740c6d5f9f2, started, etcd1, https://192.168.9.186:2380, https://192.168.9.186:2379
4d19012a3d971b72, started, etcd2, https://192.168.9.187:2380, https://192.168.9.187:2379
e30c8a56457f8a6a, started, etcd3, https://192.168.9.188:2380, https://192.168.9.188:2379

我想知道哪一个是leader?

有什么命令可以显示谁是master吗?



发表于 21天前

使用endpoint status可以显示leader。

$ ETCDCTL_API=3 etcdctl -w table --endpoints=etcd1:2379,etcd2:2379,etcd0:2379 endpoint status
+------------+------------------+---------+---------+-----------+-----------+------------+
|  ENDPOINT  |        ID        | VERSION | DB SIZE | IS LEADER | RAFT TERM | RAFT INDEX |
+------------+------------------+---------+---------+-----------+-----------+------------+
| etcd1:2379 | ade526d28b1f92f7 |   3.3.1 |  467 MB |      true |        27 |    6289071 |
| etcd2:2379 | d282ac2ce600c1ce |   3.3.1 |  467 MB |     false |        27 |    6289071 |
| etcd0:2379 | cf1d15c5d194b5c9 |   3.3.1 |  467 MB |     false |        27 |    6289071 |
+------------+------------------+---------+---------+-----------+-----------+------------+

还有可以使用--cluster,更便捷,不必使用--endpoints标志来单独指定每个端点。

$ ETCDCTL_API=3 etcdctl endpoint status --cluster -w table
+----------------------------+------------------+---------+---------+-----------+-----------+------------+
|          ENDPOINT          |        ID        | VERSION | DB SIZE | IS LEADER | RAFT TERM | RAFT INDEX |
+----------------------------+------------------+---------+---------+-----------+-----------+------------+
| http://192.168.144.11:2379 | 939e974d80fa7dd5 |  3.3.13 |   20 kB |      true |         2 |         12 |
| http://192.168.144.13:2379 | bd04095b49eb535c |  3.3.13 |   20 kB |     false |         2 |         12 |
| http://192.168.144.12:2379 | cf7585769b2ce974 |  3.3.13 |   20 kB |     false |         2 |         12 |
+----------------------------+------------------+---------+---------+-----------+-----------+------------+
啊啊 -> 半兽人 21天前

感谢大佬,save my live!

Jerry Wu -> 半兽人 17天前

请问大佬,api里面有这种查看集群节点和leader的接口么,找了半天,发现在client里面有NewMemberAPI可以导出,但是client3里面的MemberList看不到leader信息。。

Jerry Wu -> Jerry Wu 17天前

看了下源码实现,找到了,这个命令是用的cli.Status,但是查出来的是ID,需要用member list的名称对应一下

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