记一次keepalived配置nopreempt不抢占模式总是失效

配置文件

• 主配置文件

! Configuration File for keepalived

global_defs {
   router_id gd_ha01
}

vrrp_script check_nginx {
    script "pidof nginx"
    interval 2
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens160
    virtual_router_id 101 
    priority 100
    advert_int 2
    nopreempt 
    authentication {
        auth_type PASS
        auth_pass 1111
    }

    notify_master "/application/keepalived/scripts/master.sh"
    notify_backup "/application/keepalived/scripts/backup.sh"
    notify_fault "/application/keepalived/scripts/fault.sh"

    track_script {
        check_nginx
    }

    virtual_ipaddress {
        192.168.0.93
    }
}

• 备配置文件

! Configuration File for keepalived

global_defs {
   router_id gd_ha02
}

vrrp_script check_nginx {
    script "pidof nginx"
    interval 2
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens160
    virtual_router_id 101 
    priority 80
    advert_int 2
    nopreempt 
    authentication {
        auth_type PASS
        auth_pass 1111
    }

    notify_master "/application/keepalived/scripts/master.sh"
    notify_backup "/application/keepalived/scripts/backup.sh"
    notify_fault "/application/keepalived/scripts/fault.sh"

    track_script {
        check_nginx
    }

    virtual_ipaddress {
        192.168.0.93
    }
}

原因分析

检查多次配置文件没有错，主的上面nginx杀掉后，vip漂移到备上能正常访问，主的nginx起来后，vip又飘回到主上，各种排查（设置preempt_delay、设置ip转发、了解单播/组播），各种配置文件修改，折腾一番后还是没有解决，正准备打算就这种使用抢占模式使用时，突然想起来前几天自己配置的别的keepalived，发现局域网中有virtual_router_id相同的服务器导致的不抢占模式失效。