[Pacemaker] trouble with quorum

Andrey Groshev greenx at yandex.ru
Fri May 24 06:35:27 UTC 2013



24.05.2013, 01:39, "Andrew Beekhof" <andrew at beekhof.net>:
> On 24/05/2013, at 3:49 AM, Andrey Groshev <greenx at yandex.ru> wrote:
>
>>  23.05.2013, 02:51, "Andrew Beekhof" <andrew at beekhof.net>:
>>>  On 22/05/2013, at 10:25 PM, Groshev Andrey <greenx at yandex.ru> wrote:
>>>>   Hello,
>>>>
>>>>   I try build cluster with 2 nodes + one quorum node (without pacemaker).
>>>  This is the root of your problem.
>>>
>>>  Your config has:
>>>>   service {
>>>>           name: pacemaker
>>>>           ver: 1
>>>>   }
>>  Well, I tested and "service version 0" and CMAN
>
> Do not do this.  If you want to use CMAN, remove the service {} block completely.

Of course , I tested their separately.
But not fully tested "service version 0".
I repeated the test today - his behavior too as same "version 1".
Maybe the problem described in the official documentation?

>>  - it work.
>>  But I did not find in the documentation description of this option,
>>  although it was nearly six months each weekday reread "cluster from scratch" and other documens. :)
>>  Where can I find this documentation?
>>
>>  I was still the next question - about hangs elections.
>>  But I read your blog entirely ...
>>  That is, If plugins are buggy and no one to repair them will not, then have three choices:
>>  1. use service version of "0"
>
> This is still the plugin
>
>>  2. use CMAN
>>  3. Use corosync 2.x.
>>  I understood you correctly?
>>>  So even though you thought you only started corosync, you also started part of pacemaker.
>>>  Specifically the part of pacemaker that gets loaded into corosync to provides membership and _quorum_ APIs to the other daemons.
>>>
>>>  The output from corosync-quorumtool is completely irrelevant to pacemaker in this kind of setup.
>>>
>>>  Since you're on a RHEL derivative, I highly suggest using Pacemaker with CMAN (and updating to 6.4 while you're there :-).
>>>  In this case, the pacemaker daemons DO see the same quorum as corosync-quorumtool and your expectations would be correct.
>>>  snip .....
>>  Unfortunately (or fortunately) I try not to focus on one specific distribution.
>>  I have to work with CentOS, and with many other Linux distributions.
>>  I am interested in your opinion, what will happen to the clusters in openSUSE?
>>
>>  Regards Andrey Groshev.
>>
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>
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