[Openstack] keepalive can not check the haproxy is down.

[Lei Zhang]

Hi Guys,

I am trying to use keepalive and haproxy to work together to improve the HA
of the openstack. But I meet following
unexpected issue.

I expect that when the haproxy process is crashed on the MASTER
node(checked by chk_haproxy), the second node
will take over the VIP. But when I stop the haproxy process, nothing is
happened.
However, when stop the keepalived service, the VIP is set up on the node2
as expected.

So I think the root cause should be the chk_haproxy block. But I have no
idea why it doesn't work. Does any body have
ideas?

*node1 keepalived.conf*

global_defs {
    lvs_id LVS_228
}

vrrp_sync_group openstack_haproxy {
    group {
        v1
        v2
    }
}
vrrp_script chk_haproxy {
    script "killall -0 haproxy"
    interval 2
    debug
    weight 2
}
vrrp_instance v1 {
    interface eth0
    debug
    state MASTER
    virtual_router_id 1
    priority 101
    virtual_ipaddress {
        192.168.0.230/24
    }
    track_script {
        chk_haproxy
    }
}
vrrp_instance v2 {
    interface eth1
    state MASTER
    debug
    virtual_router_id 2
    priority 101
    virtual_ipaddress {
        10.1.0.30/16
    }
    track_script {
        chk_haproxy
    }
}

*node2 keepalived.conf*

global_defs {
    lvs_id LVS_229
}

vrrp_sync_group openstack_haproxy {
    group {
        v1
        v2
    }
}
vrrp_script chk_haproxy {
    script "killall -0 haproxy"
    interval 2
    weight 2
}
vrrp_instance v1 {
    interface eth0
    state BACKUP
    virtual_router_id 1
    priority 100
    virtual_ipaddress {
        192.168.0.230
    }
    track_script {
        chk_haproxy
    }
}
vrrp_instance v2 {
    interface eth1
    state BACKUP
    virtual_router_id 2
    priority 100
    virtual_ipaddress {
        10.1.0.30
    }
    track_script {
        chk_haproxy
    }
}

-- 
Lei Zhang

Blog: http://jeffrey4l.github.com
twitter/weibo: @jeffrey4l

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