Have a pool of 3 servers. All are Xen v6.2. Applied latest patches this morning in the usual fashion:
- Patch pool master
- Move VMs off of slave machine 1 and restart it
- Repeat with slave 2 and then master
This has worked previously.
This morning the first slave won't come out of maintenance mode. Have attempted multiple reboots, 'restart toolstack' and even removing it from the pool. Most report "Cannot forward messages because the server cannot be contacted. The server may be switched off or there may be a network connectivity problem."
I know this isn't the case as I can SSH to the machine from elsewhere in the subnet.
Suggestions as to where I went wrong and how to fix this?