davidvossel/pacemaker — comment on commit 2f28839e1c21ead4b4567479a05536eb97762b4a
File: tools/crm_mon.c line 1301
By beekhof:

This will do for the first pass, but for clusters running against corosync 2.0 this wont contain anything meaningful.
You'd have to do something like tools/ccm_epoche.c to get the true value.

Either that, or we punt on this and QE uses the above tool directly.