[ClusterLabs] Disabling stonith in Pacemaker 2.0

Digimer lists at alteeve.ca
Mon Sep 18 15:11:09 EDT 2017

On 2017-09-18 02:55 PM, Ken Gaillot wrote:
> On Mon, 2017-09-18 at 13:53 -0400, Digimer wrote:
>> On 2017-09-18 01:48 PM, Ken Gaillot wrote:
>>> As discussed at the recent ClusterLabs Summit, I plan to start the
>>> release cycle for Pacemaker 1.1.18 soon.
>>> There will be the usual bug fixes and a few small new features, but
>> the
>>> main goal will be to provide a final 1.1 release that Pacemaker 2.0
>> can
>>> branch from.
>>> As such, 1.1.18 will start to log deprecation warnings for syntax
>> that
>>> is planned to be removed in 2.0. So, we need to decide fairly
>> quickly
>>> what we intend to remove.
>>> Below is what I'm proposing. If anyone feels strongly about keeping
>>> support for any of these, speak now or forever hold your peace!
> <snip>
>>> * cluster properties that have been obsoleted by the rsc_defaults
>> and
>>> op_defaults sections
>>> ** stonith-enabled or stonith_enabled (now "requires" in
>> rsc_defaults)
> <snip>

Woops, missed that when I read. :)

>> Andrew announced that disabling stonith will put a node into
>> maintenance
>> mode. This should be announced/alerted as well, eh?
> My current plan is to remove the stonith-enabled option entirely, so
> there will be no stonith-enabled=false anymore.
> Users will still have a way to disable fencing, by (ab)using the
> "requires" resource meta-attribute. This is a per-resource option
> rather than cluster-wide (though it can be applied to all resources
> using rsc_defaults).
> I don't plan on preventing people from running only resources with
> requires=quorum or requires=nothing, without any fencing configured.
> However we will probably start tracking whether at least one resource
> has requires=fencing, and require that at least one enabled fencing
> device be configured if so. If fencing is not available in such a case,
> we could put the cluster into maintenance mode, or log a warning and
> block when fencing is needed.


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