[Pacemaker] Stopping/restarting pacemaker without stopping resources?

[Andrei Borzenkov]

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?

TIA

-andrei