problem during upgrade when in a cluster (heartbeat/drbd)

Binary package hint: sysv-rc

Hi,

we have a drbd/heartbeat cluster on which we have installed unattended-upgrades to get the latest security updates as quickly as possible on our production machine. We also have a mysql server which is controlled by heartbeat. So all rc links to /etc/init.d/mysql are removed so the server does not start at bootup, but rather lets heartbeat decide if he is the primary node and starts all necessary (controlled) services.

During an upgrade of the mysql server, the server is stopped. But then for starting invoke-rc.d is called, and since the rc links are removed, it will decide not to start the server again.

In my eyes this is to be considered a bug.