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Re: [Linux-cluster] Problems with Cluster

On 6/11/07, Robert Gil <Robert Gil americanhm com> wrote:
If ilo itself is off, fencing doesn't work.

Isn't there any timeout setting such that if the ILO doesn't respond
for a certain amount of time, it is treated as fenced and the node is
considered to be dead and the failover takes place?

Did you add ilo as a fence device? And create a user? You create a user in the ilo for that blade, not on the chassis. You have to reboot the blade to get to the ilo manager.

Yes, had added respective ILOs as fence devices for both the servers
and created users also.

I just want to make sure that automatic fencing happens and failover
takes place even when there is a complete power failure for one node

-----Original Message-----
From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of Manish Kathuria
Sent: Monday, June 11, 2007 12:45 PM
To: linux clustering
Subject: Re: [Linux-cluster] Problems with Cluster

On 6/11/07, Maciej Bogucki <maciej bogucki artegence com> wrote:
> Manish Kathuria napisaƂ(a):

> > We want the failover to happen when the power supply fails to either
> > of the nodes. In order to test the scenario, we removed the power
> > cables from one of the nodes. However the failover did not happen
> > and upon observing the logs we found that the alive node could not
> > connect to the fence device (ILO in this case) of the dead node
> > since it was powered off and the fencing could not take place. Does
> > this mean that we would not be able to have a failover in case of
> > power failure for one of the nodes. Is there a way we can do it ?
> > How is the cluster supposed to react when the ILO itself is powered off ?
> You need to perform manual fencing(administrator reaction) when it happend.

Isn't there any way which is automated and does not require manual intervention ? Otherwise, the whole purpose gets defeated.

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