[Linux-HA] Double node configuration with mixed ressource

[Andrew Beekhof]

On Dec 5, 2007, at 1:44 PM, Dejan Muhamedagic wrote:

> Hi,
>
> On Wed, Dec 05, 2007 at 11:51:20AM +0100, Franck Ganachaud wrote:
>> Well I don't want hearbeat to stop or start mysql.
>
> You should be better off if you do. Otherwise, you'll probably
> end up with an unmaintainable and complex configuration.
>
>> And if I colocate R1 with mysql, will a R1 move from server A to B
>> implie mysql move also?
>
> Not necessarily. Colocations don't have to be symmetrical.

particularly not if its a clone (ie. a resource that has a copy  
running on each node)

if you really object to having heartbeat manage mysql, use  
is_managed=false for just the mysql resource.
with this setting, the cluster will never ever modify the state of  
your resource (only check it's health and make decisions for R1 based  
on that)

>
>
> Thanks,
>
> Dejan
>
>> Franck.
>>
>> Andrew Beekhof a ?crit :
>>>
>>> On Dec 5, 2007, at 9:42 AM, Franck Ganachaud wrote:
>>>
>>>> I try to be more explicit.
>>>> I use v2 configuration
>>>>
>>>> I got 2 servers A and B. A set (group) of resource R1.
>>>> R1 is running by default on server A and jump to server B in case  
>>>> of
>>>> trouble.
>>>> This is currently setup and working fine.
>>>>
>>>> Now, i need to check mysql running on both server A and B.
>>>>
>>>> If mysql isn't ok on server running R1, I need to stop
>>>> whateverdaemond and move R1 to the other server
>>>> If mysql isn't ok on server not running R1, I just need to stop
>>>> whateverdaemond.
>>>>
>>>> I made a OCF agent that does the "stop whateverdaemond if mysql is
>>>> down" job
>>>
>>> dont do that
>>> write a proper agent for whateverdaemond (maybe you can use an
>>> init-script instead)
>>>
>>> add a clone resource for mysql
>>> add a clone resource for whateverdaemond
>>> colocate whateverdaemond with mysql
>>> colocate R1 with mysql
>>>
>>>>
>>>> This where I get puzzled, how to translate the relation between the
>>>> "if running R1"  and the agent I wrote it in heartbeat groups and
>>>> constraints
>>>>
>>>> Hope it's clearer.
>>>> Franck.
>>>>
>>>> Dejan Muhamedagic a ?crit :
>>>>> Hi,
>>>>>
>>>>> On Tue, Dec 04, 2007 at 05:25:08PM +0100, Franck Ganachaud wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I have a two 2 node cluster.
>>>>>> group1 is active/passive set of ressource.
>>>>>> group1 is currently hop-ing  from one node to the other as  
>>>>>> intended
>>>>>> when one of the group ressource isn't available.
>>>>>>
>>>>>> Now I have a second task for heartbeat.
>>>>>> On each node, I have a mysql server, if it goes wrong, I must
>>>>>> shutdown a service and migrate the group1 (if it runs on this  
>>>>>> node)
>>>>>> to the other node.
>>>>>> And this something I don't know how to do.
>>>>>>
>>>>>> I was thinking about creating a group2 in an active/active
>>>>>> configuration testing mysql and if goes wrong just shutdown the
>>>>>> service in the stop process of the group2 but I don't know how to
>>>>>> force in this case the push of the group1 to the other node of  
>>>>>> it's
>>>>>> running on the group2 failing node.
>>>>>>
>>>>>
>>>>> Sorry, but I can't follow. Can you please rephrase.
>>>>>
>>>>> Which configuration do you use: v1 or v2?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Dejan
>>>>>
>>>>>
>>>>>> Any one can help me?
>>>>>> Hope it's clear.
>>>>>>
>>>>>> Franck.
>>>>>> _______________________________________________
>>>>>> Linux-HA mailing list
>>>>>> Linux-HA at lists.linux-ha.org
>>>>>> http://lists.linux-ha.org/mailman/listinfo/linux-ha
>>>>>> See also: http://linux-ha.org/ReportingProblems
>>>>>>
>>>>> _______________________________________________
>>>>> Linux-HA mailing list
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>>>>>
>>>>>
>>>>
>>>> -- 
>>>> GANACHAUD Franck
>>>> Consultant
>>>> Tel. : +33 (0)2 98 05 43 21
>>>> http://www.altran.com
>>>> -- 
>>>> Technop?le Brest Iroise
>>>> Site du Vernis - CS 23866
>>>> 29238 Brest Cedex 3 - France
>>>> Tel. : +33 (0)2 98 05 43 21
>>>> Fax. : +33 (0)2 98 05 20 34
>>>> e-mail: franck.ganachaud at altran.com
>>>>
>>>> _______________________________________________
>>>> Linux-HA mailing list
>>>> Linux-HA at lists.linux-ha.org
>>>> http://lists.linux-ha.org/mailman/listinfo/linux-ha
>>>> See also: http://linux-ha.org/ReportingProblems
>>>
>>> _______________________________________________
>>> Linux-HA mailing list
>>> Linux-HA at lists.linux-ha.org
>>> http://lists.linux-ha.org/mailman/listinfo/linux-ha
>>> See also: http://linux-ha.org/ReportingProblems
>>>
>>
>> -- 
>> GANACHAUD Franck
>> Consultant
>> Tel. : +33 (0)2 98 05 43 21
>> http://www.altran.com
>> --
>> Technop?le Brest Iroise
>> Site du Vernis - CS 23866
>> 29238 Brest Cedex 3 - France
>> Tel. : +33 (0)2 98 05 43 21
>> Fax. : +33 (0)2 98 05 20 34
>> e-mail: franck.ganachaud at altran.com
>>
>> _______________________________________________
>> Linux-HA mailing list
>> Linux-HA at lists.linux-ha.org
>> http://lists.linux-ha.org/mailman/listinfo/linux-ha
>> See also: http://linux-ha.org/ReportingProblems
> _______________________________________________
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