Hi, On Sun, Jun 06, 2010 at 05:47:35PM +0300, Dan Frincu wrote: > Hello all, > > I have a couple of questions and I haven't found any relevant > documentation about it so I would appreciate any answers on the > matter. > > I'm using drbd 8.3.2-6 with pacemaker 1.0.5-4.2, openais 0.80.5-15.2 > and heartbeat 3.0.0-33.3 for a high availability 2 node cluster for > mysql and apache with drbd partitions. > > What I want to know is if a a resource fails, such as apache, > pacemaker tries to restart the service, it has to do with > "common_apply_stickiness", from what I can see in the logs.
I guess that you mean default-resource-stickiness and resource-stickiness. > 1. How many times does pacemaker try to restart a resource before > declaring it "down" and migrating the resource (and dependencies) to > the other node? migration-threshold > 2. How can I alter this behavior, to be able to set the number of > retries a resource is attempted to be restarted before migrating it > to the other available node? ditto. Note that if fail counts on both nodes reach migration-threshold the resource won't run anywhere. > I've noticed that sometimes, if there is a problem with the block > device (drbd) the cluster will go into a stage where it migrates all > resources in a group from A to B, however, when trying to start > resources on B, there is a synchronization issue, one block device > is still being in process of being updated from node A drbd0 to node > B drbd0. In this case the group resources don't start until the > synchronization is complete. > > 3. Can I "force" a group of resources to migrate to another node if > any of the resources fails to be brought up within a number of > retries or after a timeout (including if the group is just being > migrated from A to B, but one resource fails to start on B, to be > migrated back to A)? How? Again migration-threshold. > 4. Is there a Resource Agent out there that can be configured to > send SNMP traps? ClusterMon Thanks, Dejan > Thank you in advance for your replies. > > Best regards. > > > > > > > > > _______________________________________________ > Pacemaker mailing list: Pacemaker@oss.clusterlabs.org > http://oss.clusterlabs.org/mailman/listinfo/pacemaker > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: > http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
