CentOS 部署Etcd集群
一、环境介绍
操作系统信息：CentOS 7 64位
服务器信息:
192.168.80.130 Etcd-master
192.168.80.131 Etcd-node1
192.168.80.132 Etcd-node2
二、部署前准备
1、设置免密登录
[Master]
[root@Etcd-master ~]# ssh-keygen
[root@Etcd-master ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub Etcd-node1
[root@Etcd-master ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub Etcd-node2
2、所有机器上操作
a、添加hosts
[root@Etcd-master ~]# 192.168.80.130 Etcd-master
[root@Etcd-master ~]# 192.168.80.131 Etcd-node1
[root@Etcd-master ~]# 192.168.80.132 Etcd-node2
b、同步时间
[root@Etcd-master ~]# yum -y lrzsz git wget python-devel ntp net-tools curl cmake epel-release rpmdevtools openssl-devel kernel-devel gcc redhat-rpm-config bridge-utils
[root@Etcd-master ~]# yum groupinstall "Development Tools" -y
[root@Etcd-master ~]# cp -Rf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
[root@Etcd-master ~]# ntpdate 133.100.11.8
[root@Etcd-master ~]# sed -i 's#ZONE="America/New_York"#ZONE="Asia/Shanghai"#g' /etc/sysconfig/clock
[root@Etcd-master ~]# hwclock -w
[root@Etcd-master ~]# date -R
三、部署Etcd
[Master]
1、安装及配置Master节点
[root@Etcd-master ~]# yum -y install etcd
[root@Etcd-master ~]# cat /etc/etcd/etcd.conf
# [member]
ETCD_NAME="etcd-master"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_WAL_DIR=""
#ETCD_SNAPSHOT_COUNT="10000"
#ETCD_HEARTBEAT_INTERVAL="100"
#ETCD_ELECTION_TIMEOUT="1000"
ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:4001,http://0.0.0.0:2379"
#ETCD_MAX_SNAPSHOTS="5"
#ETCD_MAX_WALS="5"
#ETCD_CORS=""
#
#[cluster]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://etcd-master:2380"
# if you use different ETCD_NAME (e.g. test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
ETCD_INITIAL_CLUSTER="etcd-node1=http://etcd-node1:2380,etcd-node2=http://etcd-node2:2380,etcd-master=http://etcd-master:2380"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://Etcd-master:2379,http://Etcd-master:4001"
[Node]
2、安装及配置Node1节点
[root@Etcd-node1 ~]# yum -y install etcd
[root@Etcd-node1 ~]# cat /etc/etcd/etcd.conf
# [member]
ETCD_NAME="etcd-node1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_WAL_DIR=""
#ETCD_SNAPSHOT_COUNT="10000"
#ETCD_HEARTBEAT_INTERVAL="100"
#ETCD_ELECTION_TIMEOUT="1000"
ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:4001,http://0.0.0.0:2379"
#ETCD_MAX_SNAPSHOTS="5"
#ETCD_MAX_WALS="5"
#ETCD_CORS=""
#
#[cluster]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://etcd-node1:2380"
# if you use different ETCD_NAME (e.g. test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
ETCD_INITIAL_CLUSTER="etcd-node1=http://etcd-node1:2380,etcd-node2=http://etcd-node2:2380,etcd-master=http://etcd-master:2380"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://etcd-node1:2379,http://etcd-node1:4001"
3、安装及配置Node2节点：
[root@Etcd-node2 ~]# yum -y install etcd
[root@Etcd-node2 ~]# cat /etc/etcd/etcd.conf
# [member]
ETCD_NAME="etcd-node2"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_WAL_DIR=""
#ETCD_SNAPSHOT_COUNT="10000"
#ETCD_HEARTBEAT_INTERVAL="100"
#ETCD_ELECTION_TIMEOUT="1000"
ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:4001,http://0.0.0.0:2379"
#ETCD_MAX_SNAPSHOTS="5"
#ETCD_MAX_WALS="5"
#ETCD_CORS=""
#
#[cluster]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://etcd-node2:2380"
# if you use different ETCD_NAME (e.g. test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
ETCD_INITIAL_CLUSTER="etcd-node1=http://etcd-node1:2380,etcd-node2=http://etcd-node2:2380,etcd-master=http://etcd-master:2380"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://etcd-node2:2379,http://etcd-node2:4001"
4、启动Etcd服务
[master]
[root@Etcd-master ~]# systemctl restart etcd
[node1]
[root@Etcd-node1 ~]# systemctl restart etcd
[node2]
[root@Etcd-node2 ~]# systemctl restart etcd
5、查看服务状态
[master]
[root@Etcd-master ~]# etcdctl member list
6c74f3fd7534bb5: name=etcd-node1 peerURLs=http://etcd-node1:2380 clientURLs=http://etcd-node1:2379,http://etcd-node1:4001 isLeader=false
a57a17f287dbe7bb: name=etcd-node2 peerURLs=http://etcd-node2:2380 clientURLs=http://etcd-node2:2379,http://etcd-node2:4001 isLeader=true
ffe21a7812eb7c5f: name=etcd-master peerURLs=http://etcd-master:2380 clientURLs= isLeader=false
[node1]
[root@Etcd-node1 ~]# etcdctl member list
6c74f3fd7534bb5: name=etcd-node1 peerURLs=http://etcd-node1:2380 clientURLs=http://etcd-node1:2379,http://etcd-node1:4001 isLeader=false
a57a17f287dbe7bb: name=etcd-node2 peerURLs=http://etcd-node2:2380 clientURLs=http://etcd-node2:2379,http://etcd-node2:4001 isLeader=true
ffe21a7812eb7c5f: name=etcd-master peerURLs=http://etcd-master:2380 clientURLs= isLeader=false
[node2]
[root@Etcd-node2 ~]# etcdctl member list
6c74f3fd7534bb5: name=etcd-node1 peerURLs=http://etcd-node1:2380 clientURLs=http://etcd-node1:2379,http://etcd-node1:4001 isLeader=false
a57a17f287dbe7bb: name=etcd-node2 peerURLs=http://etcd-node2:2380 clientURLs=http://etcd-node2:2379,http://etcd-node2:4001 isLeader=true
ffe21a7812eb7c5f: name=etcd-master peerURLs=http://etcd-master:2380 clientURLs= isLeader=false
四、测试集群同步情况
[master]
[root@Etcd-master ~]# etcdctl set zlyangdir/zlyangkeys0 0
0
[root@Etcd-master ~]# etcdctl ls zlyangdir
zlyangdir/zlyangkeys0
[root@Etcd-master ~]# etcdctl get zlyangdir/zlyangkeys0
0
[node1]
[root@Etcd-node1 ~]# etcdctl ls zlyangdir
zlyangdir/zlyangkeys0
[root@Etcd-node1 ~]# etcdctl get zlyangdir/zlyangkeys0
0
[node2]
[root@Etcd-node2 ~]# etcdctl ls zlyangdir
zlyangdir/zlyangkeys0
[root@Etcd-node2 ~]# etcdctl get zlyangdir/zlyangkeys0
0
官方部署方案：https://coreos.com/etcd/docs/latest/op-guide/clustering.html
至此Etcd集群搭建已经完成，如有问题请联系：DBA_Master@163.com