I've just completed an upgrade from 3 x ESXi 5.0 hosts and a vCenter 5.1 appliance (Essentials Plus) to ESXi 6.0.5050593 and VCSA 6.5.5973321. This is a fully supported VMware setup. I upgraded the licenses and applied them to the new setup ok.
One very strange observation is that when I try and vmotion a VM to another host, if I select 'Change compute resource only', invariably the only destination host I'll see is the host the VM is currently running on - no other cluster hosts will show. If though, I select 'Change both compute resource and storage', I can expand the cluster and see all hosts. This method of migrating the VM will work, but I have to 'fake' a datastore change selection.
Things I've verified are;
It happens in both the Flash and HTML UI's.
Sometimes I will see all the migration hosts, but not all the time and very inconsistently
The message pre-migration will always show 'Compatability checks succeeded'.
I thought initially it was out of date VMware Tools, and it certainly looked more promising when tools was updated to 10.0.9 (build 10249), but then it all seemed to revert back and the same things happen. Is this a bug? I know I'm not running the latest ESXi version, or even the latest build of ESXi 6.0, but I'm not quite ready for that yet. It never happened in 5.x.
Ideas?
Thanks