> Is it correct that there were 3 vms on the compute node and only one of them lost connectivity after rollback?
Correct.
> Also is it expected that VMs must keep connectivity after compute node rollback (a bit concerned about provision and rollback steps)? Which component/feature should ensure that? Is it documented anywhere?
Possibility of VMs preservation after redeployment of compute node is necessary for MOS upgrade. Also It's reason to increase bug's priority
> Is it correct that there were 3 vms on the compute node and only one of them lost connectivity after rollback?
Correct.
> Also is it expected that VMs must keep connectivity after compute node rollback (a bit concerned about provision and rollback steps)? Which component/feature should ensure that? Is it documented anywhere?
Possibility of VMs preservation after redeployment of compute node is necessary for MOS upgrade. Also It's reason to increase bug's priority