[Pacemaker] trigger STONITH for testing purposes

[Yan Gao]

On Wed, 2009-06-03 at 09:26 +0200, Andrew Beekhof wrote:
> 2009/6/3 Yan Gao <ygao at novell.com>:
> > On Fri, 2009-05-22 at 12:33 +0200, Andrew Beekhof wrote:
> >> On Wed, May 20, 2009 at 6:39 PM, Bob Haxo <bhaxo at sgi.com> wrote:
> >> > Hi Andrew,
> >> >
> >> > I'd say you removed no-quorum-policy=ignore
> >> >
> >> > Actually, the pair of no_quorum_policy and no-quorum-policy are set to
> >> > "ignore", and expected-quorum-votes is set to "2":
> >> >
> >> >   <crm_config>
> >> >     <cluster_property_set id="cib-bootstrap-options">
> >> >       ...
> >> >       <nvpair id="cib-bootstrap-options-expected-quorum-votes"
> >> > name="expected-quorum-votes" value="2"/>
> >> >       <nvpair id="cib-bootstrap-options-no_quorum_policy"
> >> > name="no_quorum_policy" value="ignore"/>
> >> >       <nvpair id="nvpair-1d2c923d-7619-4b45-989a-698357f9f8cb"
> >> > name="no-quorum-policy" value="ignore"/>
> >> >       ...
> >> >       </cluster_property_set>
> >> >    </crm_config>
> >> >
> >> > Removing the no-quorum-policy=ignore and no_quorum_policy=ignore (as in,
> >> > deleting the variables) left the cluster unable to failover with either an
> >> > ifdown iface or with a node reboot.  The state displayed by the GUI did not
> >> > agree with the state displayed by crm_mon (the GUI showed the ifdown or
> >> > rebooted node as still controlling resources, whereas crm_mon showed the
> >> > resources unavailable ... both showed the inaccessible node as offline).
> >>
> >> Assuming stonith-enabled was set to false, crm_mon is correct as the
> >> cluster assumes that the node is cleanly down*.
> >> You should file a bug for the GUI in that case.
> > It happens when a node is uncleanly offline, while the resources are
> > still seen running on the node (according to rsc->running_on) , and the
> > resources's role is still "Started".
> >
> > Changed in mgmtd:
> > http://hg.clusterlabs.org/pacemaker/pygui/rev/f6b91f133ce8
> >
> > In that case, regards the resources status is "unclean":
> > ..
> > if (g_list_length(rsc->running_on) > 0
> >                 && rsc->fns->active(rsc, TRUE) == FALSE) {
> >     strncat(buf, "unclean", sizeof(buf)-strlen(buf)-1);
> > ..
> >
> >
> > Andrew,
> > If we execute crm_mon without "-r", the resources have ever been running
> > on the uncleanly offline node will be hidden.
> 
> Even when stonith-enabled is set to true?
Yes, when the node is in "unclean offline", before it has been stonithed
or there's no stonith resource configured. As far as I found, this is
the only situation that the inconsistency happens.

> 
> > While with "-r", the
> > primitive resources will be shown as "Started" on that node.
> > "crm_resource -W"  has the same behavior.
> >
> > That's inconsistent. Perhaps we also need to consider if resources are
> > "active" when those options are enabled?
> >

-- 
Regards,
Yan Gao
China R&D Software Engineer
ygao at novell.com

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