[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-ha
Subject:    Re: [Linux-HA] Heartbeat suitability question
From:       Peter Kruse <pk () q-leap ! com>
Date:       2005-08-31 11:43:30
Message-ID: 431597E2.80107 () q-leap ! com
[Download RAW message or body]

Hello,

Andrew Beekhof (GMail) wrote:
> 
> On Aug 30, 2005, at 3:40 PM, Alan Robertson wrote:
> 
>>
>> Andrew Beekhof:  How can one tell it that applications ought to  
>> migrate on failure in release 2.  Can this be done with negative  
>> resource stickiness?
> 
> A negative value for resource stickiness would result in the resource 
> (s) always being moved, every time the PE is invoked.
> 
> At the moment, the PE would usually try and recover the resource in  its 
> current location after a monitor failure.  However, if the  recovery 
> fails it will then me migrated to a new machine (unless it  was the stop 
> that failed and fencing is not configured).
> 
> If someone was to say that we need the ability to skip straight to  
> migrating the resource, I doubt I would have any objection.
> 
>>

it sounds resonable to first try and start the resources again before
failing over.  Can you explain what configuration is neccessary to
achieve this?  From the docs I think these settings have to be made:

in cib.xml:

...
<nvpair id="stonith_enabled" name="stonith_enabled" value="true"/>
...
<primitve ... on_stopfail="fence" ...
...
<operations>
           <op ... on_fail="fence" name="monitor" .../>
           <op ... on_fail="fence" name="start" .../>
           <op ... on_fail="fence" name="stop" .../>
</operations>

Is that correct or is something missing?

Moreover in http://linux-ha.org/ClusterConcepts I read:

To Add
Relationship between quorum and fencing.

which would be nice, as I don't fully understand.  It is written in
http://linux-ha.org/ClusterResourceManager/DTD1.0/Annotated

that if you set no_quorum_policy to "freeze" or "stop" then
fencing is disabled.  Does that mean I either have fencing
or a quorum-policy?  In other words, do I have to set
no_quorum_policy to "ignore" to have fencing?

Regards,

	Peter
_______________________________________________
Linux-HA mailing list
Linux-HA@lists.linux-ha.org
http://lists.linux-ha.org/mailman/listinfo/linux-ha
See also: http://linux-ha.org/ReportingProblems
[prev in list] [next in list] [prev in thread] [next in thread]