centos7系统keepalvie高可用（抢占式）

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一、基础环境

master: 192.168.203.128
slave: 192.168.203.129
VIP 192.168.203.130

二、安装keepalive

1、 创建依赖环境

yum -y install openssl-devel gcc gcc-c++
mkdir /etc/keepalived
wget https://www.keepalived.org/software/keepalived-2.0.18.tar.gz

2、安装keepalived

tar -zxvf keepalived-2.0.18.tar.gz
mv keepalived-2.0.18 /usr/local/keepalived
cd /usr/local/keepalived
./configure && make && make install

3、创建启动文件

cp  -a /usr/local/etc/keepalived   /etc/init.d/
cp  -a /usr/local/etc/sysconfig/keepalived    /etc/sysconfig/
cp  -a /usr/local/sbin/keepalived    /usr/sbin/

4、创建配置文件

1 master
vim /etc/keepalived/keepalived.conf

global_defs {
       router_id internal_control
}
vrrp_instance VI_1 {
       state MASTER
       interface ens33
       virtual_router_id 3
       priority 200
       advert_int 1 
       authentication {
               auth_type PASS
               auth_pass 123456
       }
       virtual_ipaddress {
               192.168.203.130/24

       }
}

2 slave
vim /etc/keepalived/keepalived.conf

global_defs {
       router_id internal_control
}
vrrp_instance VI_1 {
       state BACKUP
       interface ens33
       virtual_router_id 3
       priority 90
       advert_int 1 
       authentication {
               auth_type PASS
               auth_pass 123456
       }
       virtual_ipaddress {
               192.168.203.130/24

       }
}

5、启动keepalived(2台机器)

systemctl start keepalived
systemctl enable keepalived

查看maser上已经有vip地址了

三、测试

1 master关闭keepalived

systemctl stop keepalived 

2 salve查看vip地址

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