Ask Your Question

How neutron behaves during VM migration?

asked 2017-05-09 15:36:53 -0600

AmirV gravatar image

How neutron behaves during VM migration? I mean how neutron configures network interface after migrating a VM from one compute node to another?

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted

answered 2017-05-09 21:03:09 -0600

Hi AmirV,

As far as I get and have tested, today, after nova scheduler knows the exact target compute node, it performs the migration, then Neutron creates a new port and its binding right after the VM is ready at the target (post live migration).

There are some enhancements which should be fully ready for Pike, which aim to maintain two port bindings (one of them inactive) to cover rollback and other scenarios.

More details here:

Let me know if you need more details and I can try to get them from the right people during this week's Summit.

edit flag offensive delete link more


Thank you very much. I want it deeper. I mean what happens to TCP connections to the first port, etc.?

AmirV gravatar imageAmirV ( 2017-05-10 07:48:35 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower


Asked: 2017-05-09 15:36:53 -0600

Seen: 58 times

Last updated: May 09 '17