[Linux-cluster] Halt nodes in cluster with cable disconnect

[emmanuel segura]

Hello Miguel

Talking about the problem when both nodes gets poweroff, this is called
fencing-race, Redhat has this problem from so much time and the only fix
was made it

fence delay

delay="30"

man fence_ipmilan

And I thinks you can look for a quorum qdisk



2012/1/24 Miguel Angel Guerrero <kortux at gmail.com>

> Hi i'm trying to setup a centos cluster with two nodes with cman, drbd,
> gfs2 and i'm using ipmi for fencing. DRBD is set up between the nodes using
> a dedicated interface. So, when I unplug the drbd network cable, both nodes
> power off immediatly (i tried using crossover cable and both nodes
> connected to a switch, but both scenarios fail), and the logs doesn't seem
> to show something useful. In a previous thread on this list, it is
> recommended to deactivate ACPID daemon, even at BIOS level, but I'm still
> having troubles.
>
> If I simulate a physical disconnection with ifdown command in some node,
> this node reboots with no hassle, but unpluging the cable kills both nodes.
> I think the first scenario is correct, but the second one is not what I
> expect.
>
> Thanks for your help the next are my cluster.conf
>
>   <?xml version="1.0"?>
> <cluster config_version="2" name="WSGClust">
>         <cman expected_votes="1" two_node="1"/>
>         <clusternodes>
>                 <clusternode name="wsguardian1" nodeid="1">
>                         <fence>
>                                 <method name="wsguardian1_ipmi">
>                                         <device name="ipmi1"
> action="reboot"/>
>                                 </method>
>                         </fence>
>                 </clusternode>
>                 <clusternode name="wsguardian2" nodeid="2">
>                         <fence>
>                                 <method name="wsguardian2_ipmi">
>                                         <device name="ipmi2"
> action="reboot"/>
>                                 </method>
>                         </fence>
>                 </clusternode>
>         </clusternodes>
>         <fencedevices>
>                 <fencedevice agent="fence_ipmilan"
> ipaddr="192.168.201.220" lanplus="1" login="ADMIN" name="ipmi1"
> passwd="itac321"/>
>                 <fencedevice agent="fence_ipmilan"
> ipaddr="192.168.201.186" lanplus="1" login="ADMIN" name="ipmi2"
> passwd="itac321"/>
>         </fencedevices>
> </cluster>
>
>
> --
> Att:
> ------------------------------------
> Miguel Angel Guerrero
> Usuario GNU/Linux Registrado #353531
> ------------------------------------
>
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>



-- 
esta es mi vida e me la vivo hasta que dios quiera
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