查看状态
[root@node3 ~]# systemctl status etcd2.service
● etcd2.service
Loaded: loaded (/etc/systemd/system/etcd2.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2017-09-02 23:43:59 CST; 10min ago
Process: 2673 ExecStartPre=/usr/bin/mkdir -p /data/etcd2 (code=exited, status=0/SUCCESS)
Main PID: 2675 (etcd)
CGroup: /system.slice/etcd2.service
└─2675 /usr/bin/etcd --data-dir /data/etcd2 --name etcd2 --advertise-client-urls http://192.168.56.200:2379,http://192.168.56.200:4001 --listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001...
Sep 02 23:44:45 node3 etcd[2675]: established a TCP streaming connection with peer e37f661be0f0e44a (stream Message reader)
Sep 02 23:44:45 node3 etcd[2675]: established a TCP streaming connection with peer 161efc88633d5fd4 (stream MsgApp v2 reader)
Sep 02 23:44:45 node3 etcd[2675]: established a TCP streaming connection with peer 161efc88633d5fd4 (stream Message reader)
Sep 02 23:44:45 node3 etcd[2675]: closed an existing TCP streaming connection with peer 161efc88633d5fd4 (stream Message writer)
Sep 02 23:44:45 node3 etcd[2675]: established a TCP streaming connection with peer 161efc88633d5fd4 (stream Message writer)
Sep 02 23:44:46 node3 etcd[2675]: 52aafe548d51c9ea [term: 25] received a MsgVote message with higher term from e37f661be0f0e44a [term: 26]
Sep 02 23:44:46 node3 etcd[2675]: 52aafe548d51c9ea became follower at term 26
Sep 02 23:44:46 node3 etcd[2675]: 52aafe548d51c9ea [logterm: 20, index: 623, vote: 0] voted for e37f661be0f0e44a [logterm: 20, index: 623] at term 26
Sep 02 23:44:46 node3 etcd[2675]: 52aafe548d51c9ea [term: 26] ignored a MsgVote message with lower term from 161efc88633d5fd4 [term: 24]
Sep 02 23:44:46 node3 etcd[2675]: raft.node: 52aafe548d51c9ea elected leader e37f661be0f0e44a at term 26
[root@node3 ~]#[root@node3 ~]# netstat -lntup
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 869/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1132/master
tcp6 0 0 :::2379 :::* LISTEN 2675/etcd
tcp6 0 0 :::2380 :::* LISTEN 2675/etcd
tcp6 0 0 :::22 :::* LISTEN 869/sshd
tcp6 0 0 ::1:25 :::* LISTEN 1132/master
tcp6 0 0 :::4001 :::* LISTEN 2675/etcd
[root@node3 ~]# 查看相关主体的状态
[root@node1 etcd-v3.0.15-linux-amd64]# etcdctl member list
161efc88633d5fd4: name=etcd0 peerURLs=http://192.168.56.173:2380 clientURLs=http://192.168.56.173:2379,http://192.168.56.173:4001 isLeader=false
52aafe548d51c9ea: name=etcd2 peerURLs=http://192.168.56.200:2380 clientURLs=http://192.168.56.200:2379,http://192.168.56.200:4001 isLeader=false
e37f661be0f0e44a: name=etcd1 peerURLs=http://192.168.56.174:2380 clientURLs=http://192.168.56.174:2379,http://192.168.56.174:4001 isLeader=true
[root@node1 etcd-v3.0.15-linux-amd64]# 集群的状态监控(可以结合zabbix做监控)
[root@node1 etcd-v3.0.15-linux-amd64]# etcdctl cluster-health
member 161efc88633d5fd4 is healthy: got healthy result from http://192.168.56.173:2379
member 52aafe548d51c9ea is healthy: got healthy result from http://192.168.56.200:2379
member e37f661be0f0e44a is healthy: got healthy result from http://192.168.56.174:2379
cluster is healthy
[root@node1 etcd-v3.0.15-linux-amd64]# etcd基本操作
[root@node1 ~]# etcdctl set testkey "hello world"
hello world
[root@node1 ~]# etcdctl get testkey
hello world
[root@node1 ~]# curl -L http://localhost:2379/v2/keys/testkey
{"action":"get","node":{"key":"/testkey","value":"hello world","modifiedIndex":11,"createdIndex":11}}
[root@node1 ~]# curl -L http://192.168.56.173:2379/v2/keys/testkey
{"action":"get","node":{"key":"/testkey","value":"hello world","modifiedIndex":11,"createdIndex":11}}
[root@node1 ~]#