Advice for updating QEMU?

asked 2017-01-11 15:41:09 -0600

samb gravatar image

While attempting a live migrate, I found out that one of our compute nodes is using QEMU 1.5, while the others are on version 2.3. I would like to update QEMU to 2.3, but do not want to lose any VMs, which I hear can happen going from QEMU 1.x to 2.x as 2.x is not backwards compatible.

Is it possible to snapshot each instance on that host, then update QEMU, then re-lauch each instance from a snapshot? Or will the snapshot maintain the QEMU 1.x metadata? Or is there an easier way?

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Looks like qemu packages were fixed. This is an old ML thread about old OpenStack versions. Do you have different nova-compute versions? I would test the upgrade before doing in production, this is just something I found.

Eduardo Gonzalez gravatar imageEduardo Gonzalez ( 2017-01-11 17:07:58 -0600 )edit

Anyway, please take a look at changelog between all your qemu version and desired version.

Eduardo Gonzalez gravatar imageEduardo Gonzalez ( 2017-01-11 17:09:17 -0600 )edit

Thanks a bunch!

samb gravatar imagesamb ( 2017-01-12 11:00:44 -0600 )edit