On 11/25/11 20:31, Lars Ellenberg wrote:
> On Fri, Nov 25, 2011 at 01:54:33PM +0100, Florian Haas 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?
> 
> Well, your understanding or intuition seem to misguide you this time.
> But if you think I make shit up ;-)
> http://www.gossamer-threads.com/lists/linuxha/pacemaker/70606#70606

I didn't at all mean to insinuate you're making stuff up, but I still
believe that the currently implemented behavior is counterintuitive and
violates POLA. This difference between maintenance mode and
is-managed=false simply isn't evident from crm_mon, and thus it's
natural to assume that both will behave identically. Nowhere does
crm_mon say "maintenance mode". The only visible difference for the user
is that all resources go unmanaged. When you set is-managed=false on one
resource, then that one resource goes unmanaged. What would you
interpolate from that, if you were a novice?

Florian

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