What happens to customer VMs during maintenance of host machine or OS?

Questions / Help
1

When the machine hosting customer VMs is down for maintenance — for upgrading the OS or the hardware, what happens to the customer VMs? Are they “live migrated” to another host, or are they stopped (or paused) during the maintenance? If they are “live migrated”, does it include the migration of data on attached volumes?

For the past few years, I’ve been using platforms supporting live migration of workloads and network-attached block storage, which seems maintenance operations have been pretty transparent, except perhaps for a small slowdown during migration, and a very short “freeze” period during the switchover from the old to the new machine.

2

Hey there,

This blog might help answer some questions- Graceful VM exits, some dials · The Fly Blog

1 Like
3

Thanks for the links. It’s very clear. That means there is no live migration of the VMs I guess. When the app receives the signal it should prepare to shutdown and wait to be restarted on another or the same host?

What about block storage (volumes)? If you replace a physical host machine, do you usually transfer the data to the new machine?

4

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.