I joined a third machine to a cluster and now none of the web interfaces will show any node in the left side of the data center dropdown, nor can I login to any of the GUI's.
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It's possible the new node was a slightly higher version.
I re-installed. However, weird things are happening with the cluster.
When I login to two working nodes, the initial "master" node shows the failed node that joined, but the other node doesn't.
Datacenter shows 2/3 nodes on the other two machines with "create cluster" and join. But it has a cluster name. It's like it sees two other nodes but doesn't know it's in a cluster?
I attempted to join the cluster with a node that was previously connected successfully before and get:
detected the following error(s):
* this host already contains virtual guests
TASK ERROR: Check if node may join a cluster failed!