[Pacemaker] Fencing of bare-metal remote nodes

[Vladislav Bogdanov]

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

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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