The host has notified me that a planned software upgrade will take place between 2015-09-01 02:00 UTC and 2015-09-01 07:00 UTC. Downtime should last for 2-5 minutes and if I've set everything up correctly everything should come back up with no intervention.
How nice is it to have a host that notifies us about downtime now? Please let me know if you should have any questions.
Thanks,
-HM