[Linux-cluster] Re: How do you verify/test fencing?

[Brandon Young]

Unplug the heartbeat cable.

On Wed, May 7, 2008 at 6:19 AM, Chris Picton <lists at tangent.co.za> wrote:

> On Tue, 06 May 2008 17:35:04 -0400, Lon Hohberger wrote:
>
> > On Tue, 2008-05-06 at 14:37 -0600, Gary Romo wrote:
> >>
> >> Is there a command that you can run to test/veryify that fencing is
> >> working properly?
> >> Or that it is part of the fence if you will? I realize that the primary
> >> focus of the fence is to shut off the other server(s).
> >> However, when I have a cluster up, how can I determine that all of my
> >> nodes are properly fenced?
> >
> >
> > * For testing whether or not fencing works, stop the cluster software on
> > all the nodes and run 'fence_node <nodename>' (where nodename is a host
> > you're not working on).
> >
> > * For testing whether or not a node will be fenced as a matter of
> > recovery, try 'cman_tool services'.  If that node's ID isn't in the
> > "fence" section, it will not be fenced if it fails.
>
> These two step will not test that a node will be fenced automatically if
> it is malfunctioning.
>
> What can be done to a cluster node, to test that it will be automatically
> fenced if there is a problem.
>
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