I'm building a simple 2-node cluster with Ganeti+DRBD... What is the recommended way to setup automatic failover?
I'm used to Heartbeat, but they say it should be avoided with my setup.
AFAIU, the message your linking just mean heartbeat should not take action on DRBD on its own as this is well managed by ganeti. Instead, heartbeat/pacemaker could be used to detect node failure and trigger Ganeti failover sequence, i.e. gnt-* commands.