keepalived 安装及配置VIP漂移

Posted 2021-01-18 maoxianfei

环境：

主机 10.10.6.105

备机 10.10.6.106

VIP  10.10.6.188

一、安装

yum install keepalived -y

二、配置文件（/etc/keepalived/keepalived.conf）

主机配置

global_defs {
   notification_email {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
　 #注释下行否则ping 不通
   #vrrp_strict
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}
#脚本监控
vrrp_script chk_mysql {
        script "/etc/keepalived/check_mysql.sh"
        interval 2
        weight 2
}

vrrp_instance VI_1 {
    #主机设置master
　　 state MASTER
　　#监听网卡设置
    interface ens32
   #虚拟路由ID 保持主从配置相同 
　　virtual_router_id 51
   #权重主的大于从的
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    #引用脚本
    track_script {
        chk_mysql
    }
　　#虚拟IP设置
    virtual_ipaddress {
        10.10.6.188
    }
}

从机配置与主机大致相同

#vrrp_strict
state BACKUP
priority 90

监控脚本（/etc/keepalived/check_mysql.sh ）

#scripts is check for Mysql Slave status
counter=$(netstat -na|grep "LISTEN"|grep "8080"|wc -l)
if [ "${counter}" -eq 0 ]; then
    echo ‘not found‘
else
    echo ‘pass‘
fi

三、测试

日志查看

tail -f /var/log/messages

两台机器，启动端口

nc -vl 8080

两台机器，启动服务

service keepalived start

关闭主机8080端口后日志

Nov 7 05:28:17 localhost Keepalived[47369]: Stopping
Nov 7 05:28:17 localhost systemd: Stopping LVS and VRRP High Availability Monitor...
Nov 7 05:28:17 localhost Keepalived_vrrp[47371]: VRRP_Instance(VI_1) sent 0 priority
Nov 7 05:28:17 localhost Keepalived_vrrp[47371]: VRRP_Instance(VI_1) removing protocol VIPs.
Nov 7 05:28:17 localhost Keepalived_healthcheckers[47370]: Stopped
Nov 7 05:28:18 localhost Keepalived_vrrp[47371]: Stopped
Nov 7 05:28:18 localhost Keepalived[47369]: Stopped Keepalived v1.3.5 (03/19,2017), git commit v1.3.5-6-g6fa32f2
Nov 7 05:28:18 localhost systemd: Stopped LVS and VRRP High Availability Monitor.

查看从机已经转移VIP

[[email protected] keepalived]# ip a|grep 188
inet 10.10.6.188/32 scope global ens32

漂移过程中无任何延迟问题，ping 返回正常,重启服务后vip 又返回主机