Live migrate instances between different Hardware

asked 2020-07-16 02:49:59 -0500

Robby gravatar image

Is there a way to live migrate instances between Intel and AMD nodes?

I know few parameters in nova.conf helps to migrate between old and new hardware and it worked for me before within intel hardware.

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answered 2020-07-16 03:56:44 -0500

In principle yes, if the instances don't rely on specific CPU features. Check config parameters cpu_mode and cpu_models.

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Thanks for the reply, Exactly I did the same between intel Machines, it works but for AMD it seems to be a huge performance problem during live migration. Looking for alternatives, if we do a normal migration by shutting down a VM, will this parameters still needed?,cold migration case

Robby gravatar imageRobby ( 2020-07-20 04:34:03 -0500 )edit

I don't think that these parameters are related to migration. They just determine the kind of vCPU on a compute node. In other words, the parameters are as relevant for live migration as for cold migration.

Bernd Bausch gravatar imageBernd Bausch ( 2020-07-22 03:59:40 -0500 )edit

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Asked: 2020-07-16 02:49:59 -0500

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Last updated: Jul 16