I'm not sure when this happened, but recently when I check the "Cluster" section of my Datacentre, it says there's no cluster. Except, it has been a cluster for over 5 years now, currently with 5x nodes. The whole cluster is 5.3-11, and I have been maintaining and upgrading it since about 2.3, following the proper documentation over the years for upgrading and such. Now, I have no idea what happened. There "join info" button is greyed out, I can "Create Cluster" or "Join Cluster". But I can still do Clustery things, like Live Migrate, manage the whole cluster from any node, etc. What on EARTH is going on?!?! Halp!