[Pacemaker] Colocating resources on the same physical server when resources are run inside virtual servers

[Attila Megyeri]

HI,


-----Original Message-----
From: Andrew Beekhof [mailto:andrew at beekhof.net] 
Sent: 2011. november 18. 0:28
To: The Pacemaker cluster resource manager
Subject: Re: [Pacemaker] Colocating resources on the same physical server when resources are run inside virtual servers

On Fri, Nov 18, 2011 at 12:46 AM, Andreas Kurz <andreas at hastexo.com> wrote:
> Hello,
>
> On 11/16/2011 09:04 PM, Attila Megyeri wrote:
>> Hi Team,
>>
>>
>>
>> Resources "A" and "B" are running within virtual servers. There are 
>> two physical servers "ph1" and "ph2" with two virtualized nodes on each.
>>
>>
>>
>> What would be the easiest way to have a specific resource (e.g. 
>> resource
>> "A") move to another node (From node "1" to node "2") in case when a 
>> different resource (e.g. "B")
>>
>> moves from node 3 to node 4?
>>
>>
>>
>> Resources "A" and "B" are independent, but nodes 1 and 3 are virtual 
>> servers running on physical host "ph1" whereas nodes 2 and 4 are 
>> virtual servers on physical host "ph2" and
>>
>> the goal is to have resources "A" and "B" run on the same physical
>> (host) server.
>
> Is this one cluster or are these two independent clusters?


Well, my first idea was to make them independent, but I am ready to merge them as well :)


>
> For one cluster there would the (hidden,undocumented) feature to use a 
> node-attribute in colocation constraints

Did I not document it, or just not explain how useful it could be in these cases? :-)


So I guess I found something not very trivial :)

>  unfortunately the crm shell is
> not aware of this feature so you would have to manipulate the cib 
> directly ... might be worth trying.
>
> Regards,
> Andreas
>
> --
> Need help with Pacemaker?
> http://www.hastexo.com/now
>
>>
>>
>>
>> Thank you in advance,
>>
>>
>>
>> Bests
>>
>>
>>
>> Attila
>>
>>
>>
>>
>>
>>
>>
>>
>>
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>> aker
>
>
>
>
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> ker
>
>

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