[Pacemaker] [Linux-HA] Antw: Re: Q: unmanaged MD-RAID & auto-recovery

[Andrew Beekhof]

On Fri, Nov 25, 2011 at 11:54 PM, Florian Haas <florian at hastexo.com> wrote:
> On 11/25/11 13:29, Lars Ellenberg wrote:
>>> From the log snippet it's
>>> not entirely clear whether that's a recurring monitor (interval ==
>>> whatever you configured, or 20 if default), or a probe (interval == 0).
>>>
>>> A recurring monitor clearly should not happen at all when unmanaged.
>>
>> That is incorrect.
>>
>> is-managed=false does still monitor the resource.  It only prevents
>> pacemaker from sending start/stop etc commands to that resource.
>
> My understanding was that only probes would still occur (on
> cluster-recheck-interval, or when new nodes joined the cluster). And I
> maintain that that would be the intuitively "correct" behavior for
> unmanaged resources. Andrew?

No, any defined recurring monitors will still be executed.
This allows a resource to accurately depend on the state of an unmanaged one.

>
>> If the implementation of the monitor action in the RA does trigger
>> "auto-recovery" or other things, well, then it does.
>
> Which seems to operate on the same assumption, really, that an unmanaged
> resource never has its monitor action executed.
>
> I still think that this attempt to auto-recover from _within_ the
> monitor action is a bit insane, but maybe lmb (who implemented that
> part, as per git blame) would be able to share his thoughts as to why he
> did it that way.
>
> Florian
>
>
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