Sorry for the long-winded, and delayed update to the bug!
Here's my TL;DR:
1) We want the postinst of corosync to be created with dh_installinit --restart-on-upgrade, which is the default in compat levels <= 10.
2) We want the init scripts (of whatever type) to restart pacemaker, if they restart corosync and if pacemaker was running before corosync was restarted.
Sorry for the long-winded, and delayed update to the bug!
Here's my TL;DR:
1) We want the postinst of corosync to be created with dh_installinit --restart- on-upgrade, which is the default in compat levels <= 10.
2) We want the init scripts (of whatever type) to restart pacemaker, if they restart corosync and if pacemaker was running before corosync was restarted.