> On 16 Oct 2014, at 9:31 pm, Andrei Borzenkov <arvidj...@gmail.com> wrote: > > The primary goal is to transparently update software in cluster. I > just did HA suite update using simple RPM and observed that RPM > attempts to restart stack (rcopenais try-restart). So > > a) if it worked, it would mean resources had been migrated from this > node - interruption > > b) it did not work - apparently new versions of installed utils were > incompatible with running pacemaker so request to shutdown crm fails > and openais hung forever. > > The usual workflow with one cluster products I worked before was - > stop cluster processes without stopping resources; update; restart > cluster processes. They would detect that resources are started and > return to the same state as before stopping. Is something like this > possible with pacemaker?
absolutely. this should be of some help: http://clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Pacemaker_Explained/_disconnect_and_reattach.html > > TIA > > -andrei > > _______________________________________________ > 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://bugs.clusterlabs.org _______________________________________________ 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://bugs.clusterlabs.org
