[Pacemaker] Few questions

[Romi Verma]

On Mon, Feb 9, 2009 at 5:01 PM, Andrew Beekhof <beekhof at gmail.com> wrote:

>
> On Feb 9, 2009, at 12:25 PM, Romi Verma wrote:
>
>
>
> On Mon, Feb 9, 2009 at 4:04 PM, Andrew Beekhof <beekhof at gmail.com> wrote:
>
>> On Feb 9, 2009, at 11:21 AM, Dejan Muhamedagic wrote:
>>
>>  On Mon, Feb 09, 2009 at 03:09:40PM +0530, Romi Verma wrote:
>>>
>>>>
>>>>
>>>> sorry to interrupt in between. just one question from my side.  if
>>>> no-quorum-policy is set to freeze then resource is not supposed to stop
>>>> .
>>>>
>>>
>>> right.
>>>
>>>  in
>>>> that case node will not be fenced right??
>>>>
>>>
>>> no-quorum-policy has nothing to do with fencing.
>>>
>>
>> well, depending on what it's set to, it can prevent fencing
>> (no-quorum-policy != ignore) or cause it to be initiated when quorum is lost
>> (no-quorum-policy == suicide)
>>
>> but if you're using freeze, and a resource must stop for other reasons but
>> fails to, then the node will not be shot (although it probably should be).
>
>
> Thanks Andrew,
>
> in case of more then 2 nodes we cant use no-quorum-policy to  "ignore" as
> we cant just ignore quourum. as you said in case of freeze node will not be
> fenced.
>
>
> right, but thats a good thing.
> It only applies if you have an even split (ie. 2-2) where no-one has
> quorum.
> you only want to fence if you plan on taking over the other side's
> resources - which freeze wont do.
>
> if you get a 3-1 split, then the side that has quorum _will_ shoot the 1
> node and take over its resources.
>


ook wow,  it means if i have set no-quorum-policy to "ignore" it can be used
in more than 2 nodes also.
if it  is 2-2 split then both  partitons will try to stonith each other (.to
get rid of this as you said  we have to set stonith-action=powerfail or will
not have to remove openais from startup service so that it cant get executed
once the node comes up.)

and if we get 3-1 spilit then automatically the partion having 3 nodes will
stonith the 1 node.

Thanks a lot for helping me. and sorry i bugged you lot :)


>
> so we have only two remaining suicide and stop. in case of suicide node
> does not fence other  it just reset itself.
>
>
> itself and anyone else in its current partition
>
> So the only remaining no-quorum-policy is "stop"  and if resource fails to
> stop then the node should be fenced. am i right??
>
>
> i think so
>
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