[Pacemaker] Migrate/run resource only if m/s resource is master/promoted on target node

[Martin Gombač]

Michael Schwartzkopff wrote:
> Am Montag, 28. Dezember 2009 15:30:05 schrieb Martin Gombač:
>   
>> Michael Schwartzkopff wrote:
>>     
>>> Am Montag, 28. Dezember 2009 14:36:11 schrieb Martin Gombač:
>>>       
>>>> Hi,
>>>>
>>>> i have mostly working Xen + DRBD + Live migration + Resource fencing,
>>>> but here is a slight issue with my crm config.
>>>>
>>>> I want for resource Hosting to migrate to other node only when the drbd
>>>> resource there is primary. I did try to achieve this using ordering (see
>>>> config below). Currently it can happen, that drbd resouce is still in
>>>> slave (secondary) while migration starts. Example:
>>>>         
>>> What about a colocation constraints refering to the resource in master
>>> state?
>>>       
>> I'm not sure what you mean. I think i already did this with:
>>
>> colocation Hosting_on_ms_drbd_r0 inf: Hosting ms_drbd_r0:Master
>>
>> Is this what you mean? If not, i'll be happy if you provide me with an
>> example, or point me to the docs. :-)
>>     
>
> Sorry, you also need ordering
>
> order ordDRBDHosting inf: ms_drbd_r0:promote Hosting:start
>
>   

I did that already, just without adding :start:
 >
order ms_drbd_r0_b4_Hosting inf: ms_drbd_r0:promote Hosting
 >
Is this wrong, should i add :start to Hosting and behavior will change?

Here is the relevant part of my config again; order and collocation are 
the last two lines:
 >
primitive Hosting ocf:heartbeat:Xen \
   params xmfile="/etc/xen/Hosting.cfg" \
   meta target-role="Started" allow-migrate="true" is-managed="true" \
   op monitor interval="120s" timeout="300s"
primitive drbd_r0 ocf:linbit:drbd \
   params drbd_resource="r0" \
   op monitor interval="15s" role="Master" timeout="30s" \
   op monitor interval="30s" role="Slave" timeout="30"
ms ms_drbd_r0 drbd_r0 \
   meta notify="true" master-max="2" inteleave="true"
location cli-prefer-Hosting Hosting \
   rule $id="cli-prefer-rule-Hosting" inf: #uname eq ibm1
colocation Hosting_on_ms_drbd_r0 inf: Hosting ms_drbd_r0:Master
order ms_drbd_r0_b4_Hosting inf: ms_drbd_r0:promote Hosting
 >

Thank you for your time mr. Schwartzkopff,
M.