[Pacemaker] trouble with quorum

[Andrew Beekhof]

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.

> - 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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