[Pacemaker] Fencing of bare-metal remote nodes

[David Vossel]

----- Original Message -----
> 25.11.2014 23:41, David Vossel wrote:
> > 
> > 
> > ----- Original Message -----
> >> Hi!
> >>
> >> is subj implemented?
> >>
> >> Trying echo c > /proc/sysrq-trigger on remote nodes and no fencing occurs.
> > 
> > Yes, fencing remote-nodes works. Are you certain your fencing devices can
> > handle
> > fencing the remote-node? Fencing a remote-node requires a cluster node to
> > invoke the agent that actually performs the fencing action on the
> > remote-node.
> 
> Yes, if I invoke fencing action manually ('crm node fence <rnode>' in
> crmsh syntax), node is fenced. So the issue seems to be related to the
> detection of a "need fencing".
> 
> Comments in related git commits are a little bit terse in this area. So
> could you please explain what exactly needs to happen on a remote node
> to initiate fencing?
> 
> I tried so far:
> * kill pacemaker_remoted when no resources are running. systemd restated
> it and crmd reconnected after some time.
> * crash kernel when no resources are running
> * crash kernel during massive start of resources

this last one should definitely cause fencing. What version of pacemaker are
you using? I've made changes in this area recently. Can you provide a crm_report.

-- David

> 
> No fencing happened. In the last case that start actions 'hung' and were
> failed by timeout (it is rather long), node was not even listed as
> failed. My customer asked me to stop crashing nodes because one of them
> does not boot anymore (I "like" that modern UEFI hardware very much.),
> so it is hard for me to play more with that.
> 
> Best,
> Vladislav
> 
> 
> > 
> > -- Vossel
> > 
> >>
> >> Best,
> >> Vladislav
> >>
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> 
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