[ClusterLabs] Pacemaker kill does not cause node fault ???

[RaSca]

On 03/02/2017 11:06, Ferenc Wágner wrote:
> Ken Gaillot <kgaillot at redhat.com> writes:
> 
>> On 01/10/2017 04:24 AM, Stefan Schloesser wrote:
>>
>>> I am currently testing a 2 node cluster under Ubuntu 16.04. The setup
>>> seems to be working ok including the STONITH.
>>> For test purposes I issued a "pkill -f pace" killing all pacemaker
>>> processes on one node.
>>>
>>> Result:
>>> The node is marked as "pending", all resources stay on it. If I
>>> manually kill a resource it is not noticed. On the other node a drbd
>>> "promote" command fails (drbd is still running as master on the first
>>> node).
>>
>> I suspect that, when you kill pacemakerd, systemd respawns it quickly
>> enough that fencing is unnecessary. Try "pkill -f pace; systemd stop
>> pacemaker".
> 
> What exactly is "quickly enough"?

What Ken is saying is that Pacemaker, as a service managed by systemd,
have in its service definition file
(/usr/lib/systemd/system/pacemaker.service) this option:

Restart=on-failure

Looking at [1] it is explained: systemd restarts immediately the process
if it ends for some unexpected reason (like a forced kill).

[1] https://www.freedesktop.org/software/systemd/man/systemd.service.html

-- 
RaSca
rasca at miamammausalinux.org