[Pacemaker] Stopping/restarting pacemaker without stopping resources?

[Andrei Borzenkov]

On Fri, Oct 24, 2014 at 9:17 AM, Andrew Beekhof <andrew at beekhof.net> wrote:
>
>> On 16 Oct 2014, at 9:31 pm, Andrei Borzenkov <arvidjaar at gmail.com> wrote:
>>
>> The primary goal is to transparently update software in cluster. I
>> just did HA suite update using simple RPM and observed that RPM
>> attempts to restart stack (rcopenais try-restart). So
>>
>> a) if it worked, it would mean resources had been migrated from this
>> node - interruption
>>
>> b) it did not work - apparently new versions of installed utils were
>> incompatible with running pacemaker so request to shutdown crm fails
>> and openais hung forever.
>>
>> The usual workflow with one cluster products I worked before was -
>> stop cluster processes without stopping resources; update; restart
>> cluster processes. They would detect that resources are started and
>> return to the same state as before stopping. Is something like this
>> possible with pacemaker?
>
> absolutely.  this should be of some help:
>
> http://clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Pacemaker_Explained/_disconnect_and_reattach.html
>

Did not work. It ended up moving master to another node and leaving
slave on original node stopped after that. I have crm_report if this
is not expected ...

pacemaker Version: 1.1.11-3ca8c3b