Centos7中如何实现pacemaker高可用安装配置

1.下载安装依赖包

yum -y install pcs fence-agents-all resource-agents

2.修改hosts文件

vim /etc/hosts

192.168.4.100 node1

192.168.4.101 node2

3.修改selinux

vim /etc/selinux/config

SELINUX=disabled

4.停止防火墙

systemctl stop firewalld.service

5.禁用防火墙

systemctl disable firewalld.service

6.安装pacemaker

pcs cluster setup --name ha cluster node1 node2

7.启动pacemaker

pcs cluster start --all

8.查看集群状态

pcs status cluster

9.配置集群资源

pcs resource create vip ocf:heartbeat:IPaddr2 ip=192.168.4.99 cidr_netmask=24 op monitor interval=30s

pcs resource create mysql ocf:heartbeat:mysql user=root password=123456 op monitor interval=30s

10.配置集群策略

pcs constraint colocation add vip with mysql INFINITY

pcs constraint order mysql then vip

11.查看集群资源状态

pcs status resources

12.配置集群共享存储

1）挂载共享存储

mkdir -p /data/mysql

mount -t nfs 192.168.4.1:/data/mysql /data/mysql

2）修改mysql配置文件

vim /etc/my.cnf

[mysqld]

datadir=/data/mysql

3）重启mysql服务

service mysql restart

4）查看mysql状态

netstat -ntlp|grep 3306

13.配置集群检测网络状态

pcs resource create pingd ocf:pacemaker:pingd op monitor interval=30s

14.查看集群状态

pcs status cluster

15.在node1上手动停止vip服务

pcs resource disable vip

16.查看集群状态

pcs status cluster

17.在node1上手动停止mysql服务

pcs resource disable mysql

18.查看集群状态

pcs status cluster