keepalived跨网段主备切换

1.主节点(192.168.1.10/24)配置，/etc/keepalived/keepalived.conf

vrrp_script chk_nginx {
    script /opt/test.sh
    interval 2
    weight -20
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    nopreempt
    advert_int 1

    authentication {
        auth_type PASS
        auth_pass your_password
    }

    # Use unicast peer settings
    unicast_src_ip 192.168.1.10
    unicast_peer {
        192.168.2.10
    }

    virtual_ipaddress {
        192.168.3.11/24
    }

    track_script { chk_nginx }
}

2.从节点(192.168.2.10/24)配置

vrrp_script chk_nginx {
    script /opt/test.sh
    interval 2
    weight -20
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 90
    nopreempt
    advert_int 1

    authentication {
        auth_type PASS
        auth_pass your_password
    }

    # Use unicast peer settings
    unicast_src_ip 192.168.2.10
    unicast_peer {
        192.168.1.10
    }

    virtual_ipaddress {
        192.168.3.11/24
    }
    track_script { chk_nginx }
}

3.编写/opt/test.sh脚本，脚本返回0则不执行任何操作，返回-1则降低keepalived优先级

4.在测试节点（192.168.3.10/24）上执行ping 192.168.3.11/curl 192.168.3.11命令，重启主节点上的keepalived服务，监控命令结果