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Keepalived 在主服务器电源循环时丢失 VIP

tag-icon • tag-icon linux high-availability failover vagrant keepalived
Keepalived 在主服务器电源循环时丢失 VIP

我有两台运行 Keepalived 1.2.7 的服务器，主机名分别为left和right。配置如下：

# keepalived.conf on left
vrrp_instance VI_1 {
    state MASTER
    interface eth1
    virtual_router_id 51
    priority 160
    advert_int 1
    virtual_ipaddress {
        10.10.10.200
    }
}

# keepalived.conf on right
vrrp_instance VI_1 {
    state MASTER
    interface eth1
    virtual_router_id 51
    priority 100
    advert_int 1
    virtual_ipaddress {
        10.10.10.200
    }
}

现在我关闭电源并重新开机left。系统日志如下所示，交错并带有注释：

>> started servers <<
Aug 15 19:07:32 left Keepalived[4041]: Starting VRRP child process, pid=4043
Aug 15 19:07:32 right Keepalived[4041]: Starting VRRP child process, pid=4043
Aug 15 19:07:33 left Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Transition to MASTER STATE
Aug 15 19:07:33 right Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Transition to MASTER STATE
Aug 15 19:07:33 right Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Received higher prio advert
Aug 15 19:07:33 right Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Entering BACKUP STATE
Aug 15 19:07:34 left Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Entering MASTER STATE
>> left has 10.10.10.200 <<

>> powered off left <<
Aug 15 19:08:25 right Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Transition to MASTER STATE
Aug 15 19:08:26 right Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Entering MASTER STATE
>> right has 10.10.10.200 <<

>> powered on left <<
Aug 15 19:08:58 left Keepalived[1027]: Starting VRRP child process, pid=1029
Aug 15 19:08:59 left Keepalived_vrrp[1029]: VRRP_Instance(VI_1) Transition to MASTER STATE
Aug 15 19:09:00 left Keepalived_vrrp[1029]: VRRP_Instance(VI_1) Entering MASTER STATE
Aug 15 19:09:00 right Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Received higher prio advert
Aug 15 19:09:00 right Keepalived_vrrp[4043]: VRRP_Instance(VI_1) Entering BACKUP STATE
>> neither has 10.10.10.200 <<

我原本希望left在 10.10.10.200 恢复时将其收回。为什么没有？我该如何修改我的keepalived.confs 才能实现这一点？

答案1

您希望“右侧”的配置如下所示：

vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 51
priority 100
advert_int 1
virtual_ipaddress {
    10.10.10.200
}

这备份关键字告诉 keepalived 故障恢复到掌握有空的时候。

答案2

以下配置有效，但我仍然很好奇为什么我的问题中没有。

# keepalived.conf on left
vrrp_instance VI_1 {
    state BACKUP
    interface eth1
    virtual_router_id 51
    priority 160
    advert_int 1
    preempt_delay 15
    virtual_ipaddress {
        10.10.10.200
    }
}

# keepalived.conf on right
vrrp_instance VI_1 {
    state BACKUP
    interface eth1
    virtual_router_id 51
    priority 100
    advert_int 1
    preempt_delay 15
    virtual_ipaddress {
        10.10.10.200
    }
}

preempt_delay此配置表示在优先级更高的机器上线后 15 秒重新选举新的主服务器。该选项的解释如下在邮件列表中。

这种配置有一个问题：如果两台机器都宕机了，当它们重新启动时，都不会声明 10.10.10.200。（这是由于 Vagrant 进行的网络自动配置。）

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