keepalived 安装和配置

第一步：安装

　　yum -y install keepalived

第二步：配置 /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL01 #这个id 相当与mysql的server_id ，类似router_id 也要求在每一个keepalived 上保持唯一。
}

vrrp_instance VI_1 {
    state MASTER #这是keepalived 实例的角色信息，然而真正的主从是由priority 的决定的。
    interface eno16777736 #网卡接口名
    virtual_router_id 51#这个要对两个keepalvied实例中保持一致。
    priority 100 #权重
    advert_int 1 #心跳检测间隔
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.80.100/24 #vip/mask
    }
}

第三步：启动keepalived

　　keepalived -D -f /etc/keepalived/keepalived.conf