Hi, On Mon, Nov 29, 2010 at 02:42:42PM +0100, Uwe Grawert wrote: > Was: Re: [Pacemaker] crm resource restart doesn't restart the correct resource > > Zitat von Dejan Muhamedagic <deja...@fastmail.fm>: > >>> This is happening, because, when the clone is created, >>> pacemaker stops the primitive but does not wait for the stop action >>> to return, and just starts the primitive over. And that off course >>> causes problems. >> >> Hmm, don't quite understand what is going on. Is that primitive >> part of the group? Can you describe in more detail what is going >> on. > > I have a group (grp_fs) consisting of a LVM and several Filesystem > resources, in that order. That group is started and all resources are > running. Now I do clone this group by issuing: > > crm configure clone clo_fs grp_fs > > That does stop all resources and starts them again as clone. But > Pacemaker does not seem to wait until the stop action has finished. I > have modified the LVM RA to log the action command issued to the agent > and the value returned by the agent: > > 14:24:11 [ 14495 ] Action: start > 14:24:11 [ 14494 ] Action: stop > 14:24:13 [ 14494 ] RC: 1 > 14:24:14 [ 14495 ] RC: 0 > 14:24:14 [ 14599 ] Action: monitor > 14:24:14 [ 14599 ] RC: 0 > > In brackets you see the PID. As can be seen, Pacemaker first issues a > start command and then immediately a stop afterwards, not waiting for > the first command to return. That produces an orphan resource. That > involves that the state of the LVM resource (which is now cloned) is > uncertain. It can happen to start but it can also fail.
I see. The problem here is that as far as the cluster's concerned, the new resources and the old resources are unrelated: they have different names (before it was say lvm1 and now it's lvm1:0). I'm not sure if the crmd/pengine can tell if the resources of the group which are running actually belong to the cloned group as well. Andrew? If not, then we'll have to forbid creating a clone of running resources in the shell. Thanks, Dejan > -- > Uwe Grawert > Linux / Unix Consultant & Trainer > Tel.: +49 151 12051100 > Mail: graw...@b1-systems.de > > B1 Systems GmbH > Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de > GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537 > > > > > _______________________________________________ > 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