restore metadata for pool -> incompatible version
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Dear all,
I needed to do a complete new installation of xcp-ng 8.3 LTS. I have backups of all VMs incl. the pool metadata. The latest daily backup was done on 09th of December and now, if upgrade the fresh installed xcp-ng to v35 release, the metadata backup can't be restored. Either by XenOrchestra or with "xe pool-restore-metadata" the restore is possible, always same error: "failed: restore incompatible version".
Any ideas what I'm doing wrong?
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Question likely for @team-xapi-network
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@payback007 Have you tried restoring the metadata prior to installing patches on the host?
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@danp Restoring with installation from latest .iso the error was different. Don't remember the exact failures, but there was a statement about "missing columns". Searching the forum brought me to your post in 06/2024 to apply all the available patches. Patched then with "yum" and 155 packages were updated. Then the new failure with "restore incompatible version" came up. Due to missing XO capability that moment, I did the update using command line, maybe that's the failure?
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My understanding is that you can only restore metadata to the exact same version of xapi. Does your old pool still exist?
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No the old pool is fully gone. There was a risk for compromised network incl. hypervisor password. So the pool is destroyed. VMs are still available or available by backup. Need to access some of them without network to backup so data and to re-install win11-VMs without new activation. For the win11-VMs I need all the settings/data not only the VHD disk file.
And possibility to upgrade to different xcp-ng-versions for restore? At the moment the hypervisor is at latest 8.3 .iso -> so at least I think I Need to update to the latest version before 09/12/2025.
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@Danp said in restore metadata for pool -> incompatible version:
My understanding is that you can only restore metadata to the exact same version of xapi. Does your old pool still exist?
This is quite the limitation. Is it documented?
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Let me ping @team-xapi-network
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So just for my understanding. For restoring a metadata backup or maybe also other backups I need the correct XAPI version, but a XCP-ng user is not able to select/control the needed version? Sounds lika a chicken-egg-problem…
Is it not possible to have a new .iso-Image, whenever such updates are provided? It would be an easy way on case of new Installation.
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If you look at the metadata files on the backup remote, you should see two files: data and metadata.json.
Search either of these for the term "xapi_build", and that should let you know the version of xapi that was active when the backup was made. With this additional information, it should be possible to calculate which updates to apply to your host.
