[Pacemaker] RHEL6 and clones: CMAN needed anyway?

[Andrew Beekhof]

On 09/04/2013, at 9:20 PM, Andreas Mock <Andreas.Mock at web.de> wrote:

> Hi Andrew,
> 
> once again thank you for the fast response.
> 
> My English seems to be not good enough. Therefore I
> would like to recap your answer in my words to be sure
> what you meant.
> 
> a) CMAN will die. On the long term there will be
> corosync and pacemaker. That means option 3 of
> this document
> (http://theclusterguy.clusterlabs.org/post/34604901720/pacemaker-and-cluster
> -filesystems) 
> is the target architecture.

All true, but it only applies to RHEL 7.
This architecture is not possible in RHEL 6.x

> 
> b) As I haven't tested yet I assume there will be
> an ERROR message when starting CMAN in addition to
> corosync and pacemaker. Is that what you mean?

Not quite.
You will get this error if you use the Pacemaker plugin ("ver: 0" or "ver: 1" in corosync.conf).
If I remember correctly, it also encourages you to use Pacemaker+CMAN.

> 
> Best regards
> Andreas
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: Andrew Beekhof [mailto:andrew at beekhof.net] 
> Gesendet: Dienstag, 9. April 2013 12:48
> An: The Pacemaker cluster resource manager
> Betreff: Re: [Pacemaker] RHEL6 and clones: CMAN needed anyway?
> 
> 
> On 09/04/2013, at 8:07 PM, "Andreas Mock" <andreas.mock at web.de> wrote:
> 
>> Hi all,
>> 
>> after reading several docs on clusterlabs.org and trying to
>> understand how all pieces fit together, there is one question
>> remaining (you know: I understate ;-)):
>> 
>> If I don't want to use any cluster-FS do I really need CMAN
>> on RHEL6.x and clones or is it enough to let corosync and
>> pacemaker play together?
> 
> I wouldn't rely on other options continuing to be available in the
> long-term.
> There should already be a large ERROR to this effect when the plugin starts.
> 
>> 
>> Is fencing and fencing agents independent of CMAN?
> 
> Correct, in both cases the Pacemaker equivalents are used
> 
>> 
>> Best regards
>> Andreas
>> 
>> 
>> 
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> 
> 
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> 
> 
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> 
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