[Pacemaker] Fencing of bare-metal remote nodes

[Vladislav Bogdanov]

26.11.2014 18:36, David Vossel wrote:
> 
> 
> ----- 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.

It's c191bf3.
crm_report is ready, but I still wait an approval from a customer to
send it.


> 
> -- 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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>>
>>
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>>
> 
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