Heh, another feather in the "all you need is PostgreSQL" hat: if you already use PG, then LISTEN/NOTIFY can do what that external host does as well as acting li

Heh, another feather in the "all you need is PostgreSQL" hat: if you already use PG, then LISTEN/NOTIFY can do what that external host does as well as acting like a health check for the instance since if it can't access PG it likely is in a bad way (situationally, of course, like all solutions coming from Internet commentary)