Currently, Apache ports.conf file is not being configured by this
charm. This patch changes the ports.conf default file with another one
that does not open port 80 on SSL environments..
Trigger nova-compute restart when amqp has changed
If nova-compute is contected to the message broker before
the nova-conducter then it times out after a minute and shutsdown.
The nova-cloud-controller needs to inform the nova-compute charm
to restart nova-compute when it is connected to the message broker.
The restart is limited to the leader to stop multiple restart
requests.
When resuming services exclude those managed by hacluster, in
this case haproxy. If pacemaker lacks quorum it may shut haproxy
down which will cause this charm to error.
Charmhelper sync included to bring in required
get_managed_services_and_ports method.