Etcd在Linux CentOS7 集群配置 （多台电脑机实现）
作者：互联网
环境：
Node0节点IP：192.168.200.132
Node1节点IP：192.168.200.133
Node2节点IP：192.168.200.134
将Etcd服务端布置到上面3台机器上，集群和每个节点都会生成一个uuid。启动的时候会运行Raft，选举出Leader。
防火墙端口，开放 2379、2380、4001，显示success表示创建成功
[root@Cent0S7]# firewall-cmd --zone=public --add-port=2379/tcp --permanent success [root@Cent0S7]# firewall-cmd --zone=public --add-port=2380/tcp --permanent success [root@Cent0S7]# firewall-cmd --zone=public --add-port=4001/tcp --permanent success
Node0节点，将下面配置内容加入之前创建的/etc/etcd.conf 配置文件中。
#节点名称 ETCD_NAME=etcd #缓存数据存放位置 ETCD_DATA_DIR=/var/lib/etcd/ ETCD_LISTEN_PEER_URLS="http://192.168.200.132:2380" ETCD_LISTEN_CLIENT_URLS="http://192.168.200.132:2379" #[cluster] ETCD_HEARTBEAT_INTERVAL="200" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.200.132:2380" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_ADVERTISE_CLIENT_URLS="http://192.168.200.132:2379,http://192.168.200.132:4001" ETCD_INITIAL_CLUSTER="etcd=http://192.168.200.132:2380,etcd1=http://192.168.200.133:2380,etcd2=http://192.168.200.134:2380"
Node1节点，将下面配置内容加入之前创建的/etc/etcd.conf 配置文件中。
#节点名称 ETCD_NAME=etcd1 #缓存数据存放位置 ETCD_DATA_DIR=/var/lib/etcd/ ETCD_LISTEN_PEER_URLS="http://192.168.200.133:2380" ETCD_LISTEN_CLIENT_URLS="http://192.168.200.133:2379" #[cluster] ETCD_HEARTBEAT_INTERVAL="200" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.200.133:2380" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_ADVERTISE_CLIENT_URLS="http://192.168.200.133:2379,http://192.168.200.133:4001" ETCD_INITIAL_CLUSTER="etcd=http://192.168.200.132:2380,etcd1=http://192.168.200.133:2380,etcd2=http://192.168.200.134:2380"
Node2节点，将下面配置内容加入之前创建的/etc/etcd.conf 配置文件中。
#节点名称 ETCD_NAME=etcd2 #缓存数据存放位置 ETCD_DATA_DIR=/var/lib/etcd/ ETCD_LISTEN_PEER_URLS="http://192.168.200.134:2380" ETCD_LISTEN_CLIENT_URLS="http://192.168.200.134:2379" #[cluster] ETCD_HEARTBEAT_INTERVAL="200" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.200.134:2380" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_ADVERTISE_CLIENT_URLS="http://192.168.200.134:2379,http://192.168.200.134:4001" ETCD_INITIAL_CLUSTER="etcd=http://192.168.200.132:2380,etcd1=http://192.168.200.133:2380,etcd2=http://192.168.200.134:2380"
Node0、Node1、Node2节点守护进程 /etc/systemd/system/etcd.service配置
[Unit] Description=Etcd Server Documentation=https://github.com/coreos/etcd After=network.target [Service] User=root Type=notify EnvironmentFile=/etc/etcd.conf ExecStart=/usr/local/sbin/etcd Restart=on-failure RestartSec=10s LimitNOFILE=40000 [Install] WantedBy=multi-user.target
PS：修改配置后，要删除缓存，默认是用之前的缓存启动。
删除缓存文件夹
[root@Cent0S7 ~]# rm -rf /var/lib/etcd/ [root@Cent0S7 ~]# mkdir -p /var/lib/etcd/
刷新配置
[root@Cent0S7 ~]# systemctl daemon-reload
Node0、Node1、Node2节点，分别执行下面命令启动
[root@Cent0S7 ~]# systemctl start etcd.service
PS：启动时光标一直闪，也没报错，因为其他节点还没启动，所以在查找，不用管，多开几个SecureCRT的Shell窗口启动每个service就可以了。
验证：在任意一台node上执行都能看到所有member信息
[root@Cent0S7 ]# etcdctl -w="table" --endpoints=192.168.200.132:2379 member list +------------------+---------+-------+-----------------------------+---------------------------------------------------------+ | ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | +------------------+---------+-------+-----------------------------+---------------------------------------------------------+ | 724a7b614cfa065 | started | etcd1 | http://192.168.200.133:2380 | http://192.168.200.133:2379,http://192.168.200.133:4001 | | 171955058e9a4708 | started | etcd2 | http://192.168.200.134:2380 | http://192.168.200.134:2379,http://192.168.200.134:4001 | | 3942148265deeadf | started | etcd | http://192.168.200.132:2380 | http://192.168.200.132:2379,http://192.168.200.132:4001 | +------------------+---------+-------+-----------------------------+---------------------------------------------------------+
[root@Cent0S7 ]# etcdctl --write-out=table --endpoints=192.168.200.132:2379,192.168.200.133:2379,192.168.200.134:2379 endpoint status +----------------------+------------------+---------+---------+-----------+-----------+------------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | RAFT TERM | RAFT INDEX | +----------------------+------------------+---------+---------+-----------+-----------+------------+ | 192.168.200.132:2379 | 3942148265deeadf | 3.1.5 | 25 kB | false | 176 | 10 | | 192.168.200.133:2379 | 724a7b614cfa065 | 3.1.5 | 25 kB | true | 176 | 10 | | 192.168.200.134:2379 | 171955058e9a4708 | 3.1.5 | 25 kB | false | 176 | 10 | +----------------------+------------------+---------+---------+-----------+-----------+------------+
标签：http,Etcd,192.168,CentOS7,2380,etcd,2379,ETCD,Linux 来源： https://www.cnblogs.com/wutou/p/14065723.html