启动keepalived报错(VI_1): received an invalid passwd!

一、署keepalived后测试主down掉后无法自动切换到备

查看message日志一直报此错误

 [root@lb-nginx-master ~]# tailf /var/log/messages
Jul  :: lb-nginx-master Keepalived_vrrp[]: (VI_1): received an invalid passwd!
Jul  :: lb-nginx-master Keepalived_vrrp[]: bogus VRRP packet received on eth0 !!!
Jul  :: lb-nginx-master Keepalived_vrrp[]: VRRP_Instance(VI_1) Dropping received VRRP packet...
Jul  :: lb-nginx-master Keepalived_vrrp[]: (VI_1): received an invalid passwd!
Jul  :: lb-nginx-master Keepalived_vrrp[]: bogus VRRP packet received on eth0 !!!
Jul  :: lb-nginx-master Keepalived_vrrp[]: VRRP_Instance(VI_1) Dropping received VRRP packet...

二、原因分析

因为virtual_router_id，路由ID实例，必须是唯一的，其它环境中有存在相同的实例ID，所以要修改一个其它的实例ID

# 主节点
[root@lb-nginx-master ~]# cat /etc/keepalived/keepalived.conf
bal_defs {
   # 接收邮件地址
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   # 邮件发送地址
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout
   router_id NGINX_MASTER
} 

vrrp_script check_nginx {
    script "/etc/keepalived/check_nginx.sh"
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id  # VRRP 路由 ID实例，每个实例是唯一的
    priority     # 优先级，备服务器设置
    advert_int     # 指定VRRP 心跳包通告间隔时间，默认1秒
    authentication {
        auth_type PASS
        auth_pass
    }
    virtual_ipaddress {
        192.168.5.60/
    }
    track_script {
        check_nginx
    }
}

# 备节点
 [root@lb-nginx-backup ~]# cat /etc/keepalived/keepalived.conf
bal_defs {
   # 接收邮件地址
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   # 邮件发送地址
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout
   router_id NGINX_MASTER
} 

vrrp_script check_nginx {
    script "/etc/keepalived/check_nginx.sh"
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id  # VRRP 路由 ID实例，每个实例是唯一的
    priority     # 优先级，备服务器设置
    advert_int     # 指定VRRP 心跳包通告间隔时间，默认1秒
    authentication {
        auth_type PASS
        auth_pass
    }
    virtual_ipaddress {
        192.168.5.60/
    }
    track_script {
        check_nginx
    }
}

# 检查脚本
 [root@lb-nginx-master ~]# cat /etc/keepalived/check_nginx.sh
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")

if [ "$count" -eq  ];then
    systemctl stop keepalived
fi

主备都重启keepalived，重启后再测试已正常。

 [root@lb-nginx-master ~]# systemctl start keepalived.service 
 [root@lb-nginx-backup ~]# systemctl restart keepalived