<kleind> detach and reattach with m/s resource is broken again if you
don't have constraints for the master role. upon start, the cluster
reports all resources running fine in the correct mode, but sees -1
promotion score for all drbd instances, which renders any master
colocated resource unrunnable. then stop colocated, demote drbd is
executed, which calls crm_master, now we have a promotion score and so
we have a new promotion and colocated start.
<kleind> on the one hand you say not to use constraints for the master
role because crm_master is to take care of that ...
<beekhof> its only broken if the RA is broken :)
<beekhof> the RA needs to call crm_master during probes
<kleind> probes would be monitor, right?
<beekhof> with interval = 0
<kleind> monitor_0
<beekhof> yep
<kleind> is there some $interval we can see in the RA or whats the
suggested way?
<beekhof>
http://hg.clusterlabs.org/pacemaker/stable-1.0/file/9ec6e48c1207/extra/resources/Stateful
<kleind> thx
This patch calls drbd_update_prefs if the master role is detected during
the probe. Within that function, crm_master is called and sets an
appropriate promotion score. That keeps the master instance running in
its current location.
Regards
Dominik
exporting patch:
# HG changeset patch
# User Dominik Klein <[EMAIL PROTECTED]>
# Date 1228835412 -3600
# Node ID 1a5685e8f1ed6c230ae3892856892e6a3a57d208
# Parent 057a733858655a68948f650ffb52fdddd5eb9db9
Medium: RA: drbd - make sure crm_master scores are set during probes
diff -r 057a73385865 -r 1a5685e8f1ed resources/OCF/drbd
--- a/resources/OCF/drbd Tue Dec 02 20:29:32 2008 +0100
+++ b/resources/OCF/drbd Tue Dec 09 16:10:12 2008 +0100
@@ -383,7 +383,11 @@ drbd_monitor() {
ocf_log debug "$RESOURCE monitor: resource not configured"
return $OCF_NOT_RUNNING
elif [ "$DRBD_STATE_LOCAL" = "Primary" ]; then
-# drbd_update_prefs
+ if [ -z "$OCF_RESKEY_CRM_meta_interval" ]; then
+ # Restore the master setting during probes
+ ocf_log debug "$RESOURCE monitor: restoring master setting during probe"
+ drbd_update_prefs
+ fi
return $OCF_RUNNING_MASTER
elif [ "$DRBD_STATE_LOCAL" = "Secondary" ]; then
# drbd_update_prefs
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