[Pacemaker] ping resource polling skew
Quentin Smith
quentin at MIT.EDU
Tue Mar 19 16:02:47 UTC 2013
Hi-
I have my cluster configured to use a cloned ping resource, such that I
can write a constraint that I prefer resources to run on a node that has
network connectivity. That works fine if a machine loses its network
connection (the ping attribute goes to 0, resources migrate to another
machine, etc.).
However, if instead what happens is the ping /target/ goes offline, it
seems that Pacemaker will bounce resources around the cluster, as each
node notices that the ping target is unreachable at a slightly different
time.
Is there any way to get Pacemaker to delay resource transitions until at
least one full polling cycle has happened, so that in the event of an
outage of the ping target, resources stay put where they are running?
--Quentin
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