centos7部署etcd集群

实验环境：centos7.4纯净版

192.168.216.130 node1 master

192.168.216.132 node2 slave

192.168.216.134 node3 slave

yum安装etcd

yum install etcd

yum list installed |grep -i etcd

node1 etcd 配置

cp /etc/etcd/etcd.conf /etc/etcd/etcd.conf.bak

cd /etc/etcd/

[root@localhost etcd]# egrep ^[A-Z] ./etcd.conf

ETCD_DATA_DIR="/var/lib/etcd/node1.etcd"

ETCD_LISTEN_PEER_URLS="http://192.168.216.130:2380"

ETCD_LISTEN_CLIENT_URLS="http://192.168.216.130:2379,http://127.0.0.1:2379"

ETCD_NAME="node1"

ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.216.130:2380"

ETCD_ADVERTISE_CLIENT_URLS="http://192.168.216.130:2379"

ETCD_INITIAL_CLUSTER="node1=http://192.168.216.130:2380,node2=http://192.168.216.132:2380,node3=http://192.168.216.134:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

node2 etcd 配置

cp /etc/etcd/etcd.conf /etc/etcd/etcd.conf.bak

cd /etc/etcd/

[root@localhost etcd]# egrep ^[A-Z] ./etcd.conf

ETCD_DATA_DIR="/var/lib/etcd/node2.etcd"

ETCD_LISTEN_PEER_URLS="http://192.168.216.132:2380"

ETCD_LISTEN_CLIENT_URLS="http://192.168.216.132:2379,http://127.0.0.1:2379"

ETCD_NAME="node2"

ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.216.132:2380"

ETCD_ADVERTISE_CLIENT_URLS="http://192.168.216.132:2379"

ETCD_INITIAL_CLUSTER="node1=http://192.168.216.130:2380,node2=http://192.168.216.132:2380,node3=http://192.168.216.134:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

node3 etcd 配置

cp /etc/etcd/etcd.conf /etc/etcd/etcd.conf.bak

cd /etc/etcd/

[root@localhost etcd]# egrep ^[A-Z] ./etcd.conf

ETCD_DATA_DIR="/var/lib/etcd/node3.etcd"

ETCD_LISTEN_PEER_URLS="http://192.168.216.134:2380"

ETCD_LISTEN_CLIENT_URLS="http://192.168.216.134:2379,http://127.0.0.1:2379"

ETCD_NAME="node3"

ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.216.134:2380"

ETCD_ADVERTISE_CLIENT_URLS="http://192.168.216.134:2379"

ETCD_INITIAL_CLUSTER="node1=http://192.168.216.130:2380,node2=http://192.168.216.132:2380,node3=http://192.168.216.134:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

　　

修改 etcd.service

[root@localhost etcd]# cat /usr/lib/systemd/system/etcd.service

[Service]

Type=notify

WorkingDirectory=/var/lib/etcd/

EnvironmentFile=-/etc/etcd/etcd.conf

User=etcd

# set GOMAXPROCS to number of processors

ExecStart=/bin/bash -c "GOMAXPROCS=$(nproc) /usr/bin/etcd \

--name=\"${ETCD_NAME}\" \

--data-dir=\"${ETCD_DATA_DIR}\" \

--listen-peer-urls=\"${ETCD_LISTEN_PEER_URLS}\" \

--listen-client-urls=\"${ETCD_LISTEN_CLIENT_URLS}\" \

--initial-advertise-peer-urls=\"${ETCD_INITIAL_ADVERTISE_PEER_URLS}\" \

--advertise-client-urls=\"${ETCD_ADVERTISE_CLIENT_URLS}\" \

--initial-cluster=\"${ETCD_INITIAL_CLUSTER}\"  \

--initial-cluster-token=\"${ETCD_INITIAL_CLUSTER_TOKEN}\" \

--initial-cluster-state=\"${ETCD_INITIAL_CLUSTER_STATE}\""

Restart=on-failure

LimitNOFILE=65536

以上操作在 node1、node2、node3 节点上都需要操作,需要修改对应的ip

启动 etcd

依次启动 node1、node2、node3 节点的 etcd

systemctl start etcd.service

systemctl status etcd.service

systemctl enable etcd.service

验证 etcd

etcdctl cluster-health

etcdctl member list

各个节点配置crontab 定时同步时间，否则可能会出现node1 etcd[1657]: the clock difference against peer f63afbe816fb463d is too hig问题

yum install ntp

crontab -e

0 1 * * * /usr/sbin/ntpdate ntp.sjtu.edu.cn >> /var/log/ntpdate.log 2>&1 &