After updating hypervisor, can a migration be used instead of a shutdown?
Issue
Can you avoid VM downtime when updating hosts by migrating the guests, as follows:
Host 1
VM A
VM B
Host 2
VM C
VM D
Step 1: live migrate VM A and B to Host 2
Step 2: patch Host 1
Step 3: live migrate VM A, B, C, and D to Host 1
Step 4: patch Host 2
Step 5: live migrate VM C and D back to Host 2
Environment
Red Hat Enterprise Linux 6.5
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