[Pacemaker] Best way to specify colocation and ordering

Chris Picton chris at ecntelecoms.com
Fri Aug 13 09:44:28 EDT 2010

Hi all

I have a drbd backed mysql server which has the following resources:

drbd0 -> lvm_data -> mount_data 
drbd1 -> lvm_logs -> mount_logs

I would like the drbd based filesystems to start up in parallel.  Once 
they have started, start mysql and the ip address.  Obviously the reverse 
should happen on standby or shutdown.

I currently have the following configured

colocation IP_with_mysql inf: FloatingIP group_mysql
colocation all_drbd inf: ms_drbd1:Master ms_drbd0:Master
colocation colo-data inf: group_mysql group_logs
colocation colo-logs inf: group_mysql group_data
colocation mysql_on_drbd0 inf: group_data ms_drbd0:Master
colocation mysql_on_drbd1 inf: group_logs ms_drbd1:Master
order order_data_0 inf: ms_drbd0:promote group_data:start
order order_data_1 inf: group_data:start group_mysql:start
order order_data_2 inf: group_data:start FloatingIP:start
order order_logs_0 inf: ms_drbd1:promote group_logs:start
order order_logs_1 inf: group_logs:start group_mysql:start
order order_logs_2 inf: group_logs:start FloatingIP:start

This works fine on startup and shutdown, but if I do a crm resource 
migrate MySQL, the active node shuts down the MySQL resource, but never 
releases the drbd masters or dependant resources

 Master/Slave Set: ms_drbd0
     Masters: [ chris-test-02.ecntelecoms.za.net ]
     Slaves: [ chris-test-01.ecntelecoms.za.net ]
 Master/Slave Set: ms_drbd1
     Masters: [ chris-test-02.ecntelecoms.za.net ]
     Slaves: [ chris-test-01.ecntelecoms.za.net ]
 Resource Group: group_mysql
     MySQL      (ocf::ecn:MySQL.ocf):   Stopped
     MailAlert  (ocf::heartbeat:ECNAlert):	Stopped
 FloatingIP     (ocf::heartbeat:IPaddr2):       Stopped
 Resource Group: group_data
     lvm_data   (ocf::heartbeat:LVM):   Started chris-
     mount_data (ocf::heartbeat:Filesystem):    Started chris-
 Resource Group: group_logs
     lvm_logs   (ocf::heartbeat:LVM):   Started chris-
     mount_logs (ocf::heartbeat:Filesystem):    Started chris-
 Clone Set: STONITH-clone
     Started: [ chris-test-02.ecntelecoms.za.net chris-
test-01.ecntelecoms.za.net ]

Is there a better/more concise/more correct way of specifying the 
colocations and orderings?

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