On Sat, Jul 6, 2019 at 4:58 AM Richard Chan <rich...@treeboxsolutions.com>
wrote:

> Hi oVirters,
>
> Did a 4.1 - > 4.2.8 -> 4.3.4 upgrade in two hops. Here is my experience,
> hope it can save you some pain.
>
> Gotchas
> 1. For shutdown VMs, their disks were deactivated (though still attached)
> 2. For shutdown VMs, their NICs were "Up" but "Unplugged"
> 3. VM Custom Compatibility Version is hard to find. (If it is too old say
> 3.6, 4.1) they won't start up.  The location is:  VM -> Edit -> System ->
> Advanced Parameters (click this)
>
> "Advanced Parameters" is an expandable widget that is quite small when
> collapsed. When it is expanded then you will see "Custom Compatibility
> Version"
>
> 4. Storage Domain migration to V5: I use a NFS storoage domain. This is
> migrated to the "V5" format and a lot of cleanup is done. If you have stray
> files or images not owned by 36:36 (vdsm:kvm on my NFS server), the V5
> upgrade will fail, there will be no SPM, and the Data Center will oscillate
> between Non-responsive and Contending.
>
> Why would there be non 36:36 uid/gid files? This is a long story, but from
> the older 3.x days when there was less functionality, we would sometimes
> directly manipulate the filesystem and/or qcow2 images using guestfish or
> equivalent tools which would change the owner to qemu:qemu. Forgetting to
> chown back to vdsm:kvm is a recipe for pain.
>

Bad permission are expected to cause failures when converting a domain,
since we need
to modify domain and volumes metadata. This will also cause failures to use
volumes
or in some other storage operations.

Nir
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