[Linux-HA] Double node configuration with mixed ressource

[Franck Ganachaud]

Thanks for the tips both of you.

I'm going to work on that the next few days.

Andrew Beekhof a écrit :
>
> 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
>>>>
>>>> _______________________________________________
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>>>> 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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>> See also: http://linux-ha.org/ReportingProblems
>
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> http://lists.linux-ha.org/mailman/listinfo/linux-ha
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>

-- 
GANACHAUD Franck
Consultant
Tel. : +33 (0)2 98 05 43 21
http://www.altran.com
--
Technopôle 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