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Re: [Linux-cluster] Virtual machine fence fail question



> On Tue, Mar 2, 2010 at 2:19 AM, Lon Hohberger <lhh redhat com> wrote:
> On Wed, 2010-02-24 at 10:03 +0800, Bernard Chew wrote:
>> > On Wed, Feb 24, 2010 at 4:05 AM, Lon Hohberger <lhh redhat com> wrote:
>> > On Tue, 2010-02-23 at 11:05 +0800, Bernard Chew wrote:
>> >> Hi,
>> >>
>> >> Given I have 2 Red Hat Clusters; 1 cluster consisting of physical
>> >> hosts and another consisting of virtual guests which are hosted in the
>> >> physical hosts. The physical host cluster uses DRAC fencing while the
>> >> virtual guest cluster uses virtual machine fencing.
>> >>
>> >> If a physical host goes down, I saw that DRAC fencing takes place
>> >> successfully but fencing fail for the virtual guests on the physical
>> >> host which go down (together). Does the virtual machine fencing fails
>> >> because the virtual guests are no longer available? How can I
>> >> configure fencing so that both physical hosts and virtual guests are
>> >> fenced correctly?
>> >
>> > Are you using fence_xvm/fence_xvmd or fence_virsh ?
>> >
>> > -- Lon
>> >
>> > --
>> > Linux-cluster mailing list
>> > Linux-cluster redhat com
>> > https://www.redhat.com/mailman/listinfo/linux-cluster
>> >
>>
>> Hi Lon,
>>
>> Thank you for looking into this. I am currently using fence_xvm/fence_xvmd.
>
> So, fence_xvmd should be making decisions in this case.
>
> If a host is not available (dead), fence_xvmd checks the location of the
> VM we're trying to fence.  If the VM was on a host the
> physical/bare-metal cluster has previously fenced, then fence_xvmd tells
> the requesting VM that the VM is indeed fenced.
>
> This of course requires fence_xvmd to be running in cluster mode and so
> forth.
>
> Fencing the VM works if just the VM dies, right?
>
> -- Lon
>
> --
> Linux-cluster mailing list
> Linux-cluster redhat com
> https://www.redhat.com/mailman/listinfo/linux-cluster
>

Hi Lon,

Fencing works perfectly if just the VM dies.

Thanks,
Bernard


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