[ClusterLabs] Antw: [EXT] Containers as pcs resource

Ulrich Windl Ulrich.Windl at rz.uni-regensburg.de
Thu Nov 12 02:34:49 EST 2020


My advice is to write an OCF RA, not a systemd service, because with the first option you have more control over the things happening. Not to talk about ocf-tester...
In general you can "attach" pacemaker to a service already running, but the RA has to be correct (i.e.: detect the resouirce as "running" when it is).


>>> Amith Prakash <amithp27 at gmail.com> schrieb am 10.11.2020 um 16:30 in Nachricht
<CA+fS0xKmnmNdFGbEi3Y8hhdyiL=tGUZ_R+oQ=yptSHLim=QzjA at mail.gmail.com>:
> Hello,
> Hope you are doing well.
> I have recently started playing with pacemaker and I had couple of
> questions.
> I have an already up&running container which I want to add to pacemaker as
> a resource.
> I also want to use the pacemaker  to enable/disable/manage/unmanage, etc.,
> operations for the same container.
> I tried doing it via systemd service, by writing a script to help with
> management of the container. It did not work as expected.
> Can pacemaker add a resource, when it's not involved in its creation? I.e.
> to say, can an already running container be added as a resource (without
> having to stop/start the container again)
> Also, the examples around having containers as a pacemaker resource are
> scarce, from my searches. Is there anything in particular I can refer, for
> better clarity?
> Sorry for my naiveity. Please consider me a noob here.  :)
> Looking forward to your guidance.
> Regards,
> Amith

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