[Linux-HA] Can't get the ping_group to work - problem with location constraints and DRBD

[Tobias Appel]

Hi,

I'm using Heartbeat 2.1.4 and I tried to setup a ping_group so that if I
pull the ethernet cables on one of the two nodes a failover will occur.

I have configured a ping_group group 1 in ha.cf and created a clone
resource with pingd.

The problem is, I have a resource group + a master / slave resource for
DRBD. the resource group only runs on the node which is currently
master. Now I added another constraint for pingd, so that the failover
occurs, but it does not work - nothing is happening, I think it has to
do with the DRBD resource. Here are my current constraints:

 <constraints>
   <rsc_order id="order_drbd_filesys" from="nagios" action="start"
to="ms_drbd" to_action="promote"/>
   <rsc_colocation id="colocation_drbd_filesys" to_role="Master"
from="nagios" to="ms_drbd" score="INFINITY"/>
   <rsc_location id="location_resources" rsc="ms_drbd">
     <rule id="prefered_location_resources" score_attribute="pingd">
       <expression attribute="pingd"
id="66155d1f-2210-45ad-9010-a14e48825ead" operation="defined"/>
     </rule>
   </rsc_location>
 </constraints>

I'm not quite sure how to change the location constraint to the
following:
-if you are the active node and the ping group is not reachable, stop
resource group "nagios"
- promote the other node to master for ms_drbd and start resource group
nagios there

The logfile looks like this (especially line 3 mentions the problem with
DRBD master):

Jan 30 10:24:12 nagios2 pengine: [3758]: WARN: text2task: Unsupported
action: status
Jan 30 10:24:12 nagios2 pengine: [3758]: info: master_color: Promoting
resource_drbd:0 (Master nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: info: master_color: ms_drbd:
Promoted 1 instances of a possible 1 to master
Jan 30 10:24:12 nagios2 pengine: [3758]: info: master_color: ms_drbd:
Promoted 1 instances of a possible 1 to master
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_filesys  (Started nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource nagios-vip        (Started nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_http     (Started nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_mysql    (Started nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource nagios-core       (Started nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: WARN: text2task: Unsupported
action: status
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource MailNotify        (Started nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_drbd:0   (Master nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_drbd:1   (Slave nagios1)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_drbd:0   (Master nagios2)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_drbd:1   (Slave nagios1)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_pingd:0  (Started nagios1)
Jan 30 10:24:12 nagios2 pengine: [3758]: notice: NoRoleChange: Leave
resource resource_pingd:1  (Started nagios2)


on a side note, I wonder what text2task is...this error comes frequently
in my /var/log/messages...


any help is appreciated.

bye,
tobi