It should be possible to make specific reservations for HA vms to make sure that we always have enough spare capacity to start the HA VMs if N hosts fail.
This we can do in a basic way with the pluggable scheduler but it would be better if there was a dedicated feature in the engine.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.