On Tue, Dec 21, 2010 at 7:52 AM, Thomas Guthmann <tguthm...@iseek.com.au> wrote: > Hey guys, > > This may be dumb or obvious but it took me a long time to understand why my > pingd with > dampen never got updated! So I think that this may be useful for everybody to > share. > In short: > > " You MUST define a monitor interval HIGHER than the the dampen delay. "
Which version was this? I seem to recall fixing something similar to this (its a bug in attrd) but 1.0.10 should be ok. > > An example is better than a long speech : > > *WILL WORK* > primitive pingd ocf:pacemaker:ping \ > params host_list="10.1.1.1" attempts="5" timeout="2" debug="true" > dampen="50s" \ > op monitor interval="60" timeout="60" \ > op start interval="0" timeout="90" \ > op stop interval="0" timeout="90" > > Because Monitor interval > dampen (60 > 50) > > *WILL NOT WORK* > primitive pingd ocf:pacemaker:ping \ > params host_list="10.1.1.1" attempts="5" timeout="2" debug="true" > dampen="50s" \ > op monitor interval="10" timeout="60" \ > op start interval="0" timeout="90" \ > op stop interval="0" timeout="90" > > Because Monitor interval < dampen (10 < 50) > > *Explanations* > Why ? Because every 10sec (monitor interval) pacemaker will trigger > attrd_updater > (check your logfiles for [1]). attrd_updater will wait for the dampen time > given as > an argument (-d 50s in our example). However we won't be able to wait so long > because > 10sec later, attrd_updater is called again and obviously it resets dampen > again and > again. Then pingd will never reach its dampen value and consequently > pacemaker will > NEVER update pingd (except if you force a reset with attrd_updater -R or if > you > modify the CIB). Q.E.D. > > Something somewhere should test if dampen is inferior than monitor time. It > could be > checked in the OCF in ping_validate(). But it doesn't seem to be used (note > that their is > code for an interval parameter that doesn't exist in ocf:pacemaker:ping > anyway but comes > from the old ocf:pacemaker:pingd). > > Any objections/comments to this deductive reasoning ? > > [1] : attrd_updater: [9712]: info: Invoked: attrd_updater -n pingd -v 0 -d 50s > > -Thomas > > _______________________________________________ > 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
