[Linux-ha-dev] new stonith external plugin

[Serge Dubrouski]

On 1/29/07, Lars Marowsky-Bree <lmb at suse.de> wrote:
> On 2007-01-29T10:10:44, Andrew Beekhof <beekhof at gmail.com> wrote:
>
> > >Attached is an update version. It supports on and off commands now.
> > >User still have to configure hostlist in a form "node:xen0_host
> > >node:xen0_host ...".
> > thats going to be a pain when the VMs are also resources (and therefor
> > moving around).
> >
> > or aren't we dealing with this case here?  i loose track sometimes :-)
>
> That's not being dealt with, AFAIK. In that case, the command wouldn't
> be a xm shutdown/start, but a "crm_resource ..." invocation; potentially
> one trying to stop a specific clone. I'm not sure _you_ want to deal
> with that yet. ;-)
>
> However, I think it could be simplified.
>
> First, in many cases, all the virtual guests are going to be on a single
> physical node. (ie, test "clusters".) Then only supplying one node to
> ssh to should be sufficient.

Let's nod discuss trivial cases.

>
> Second, by providing a simple list of all physical nodes, the system
> should be able to automatically figure out which node it needs to ssh to
> to shot the guest. It could try to autopopulate the hostlist from
> /etc/xen/vm/* or some other directory, as well.

Ok, Let's say user provided us with 3 Xen0 Nodes and ALL 3 of them
have config file for node1 in /etc/xen/vm. Then where should I start
node1 when "on" command is called?

>
> Then having to actually configure something should be quite rare.
>
> (Note that dealing with dead physical nodes is slightly tricky.)
>
> > as an aside (for lars/alan), would it be worthwhile having these
> > plugins use the OCF RA standard instead?
>
> They already mostly are.
>
>
> Sincerely,
>    Lars
>
> --
> SUSE Labs, Research and Development
> SUSE LINUX Products GmbH - A Novell Business     -- Charles Darwin
> "Ignorance more frequently begets confidence than does knowledge."
>
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