PBS backup/restore issue

[Eneko Lacunza]

Hi!

El 24/2/21 a las 20:03, Thomas Lamprecht escribió:
> On 24.02.21 12:53, Eneko Lacunza wrote:
>> El 24/2/21 a las 11:34, Stefan Reiter escribió:
>>> On 2/23/21 8:46 AM, Eneko Lacunza wrote:
>>>> Yesterday I hit a problem with PBS. My sequence of actions was:
>>>>
>>>> 1.a Install debian 10 VM (updated to latest, only system utilities and SSH server)
>>>> 1.b Add SSH access key to root
>>>> 1.c Shutdown VM
>>>> 1.d Backup to PBS and to NFS vía regular backup.
>>>> 1.e Start VM and install various packages - all OK.
>>>> 1.f Stop VM
>>>>
>>>> 2.a Restore VM from PBS backup
>>>> 2.b Start VM and install various packages - apt complains about no newline in linux-image-amd64 file manifest, can't install new packages.
>>>> 2.c Stop VM
>>>>
>>>> 3.a Restore VM from NFS regular backup
>>>> 3.b Start VM and install various packages - all OK.
>>>>
> [snip]
>
>> My original restores were to a ceph storage (r2 on HDD with SSD journal/DB). So i have restored again both, to that ceph storage:
> [snip]
>
>> Hope this info helps you to replicate the issue.
> FYI: Stefan could replicate it and send a patch[0] which is included now.
>
> It boiled down to caches not being flushed to disk for storage attached through
> user-space libraries (vs. kernel) by QEMU in the PBS restore case.
>
> In your case you probably do not have the "KRBD" checkbox ticked for the Ceph
> storage entry in PVE, so the user-space librbd is used for accessing that storage
> through QEMU, where this issue then hit on restore.
>
> If you want to try the fix out, there's a new QEMU package available on pvetest:
>
> http://download.proxmox.com/debian/pve/dists/buster/pvetest/binary-amd64/pve-qemu-kvm_5.2.0-2_amd64.deb
> sha256sum: 6a086e0b669447f0b8a7899f9194a26785e6b0070f3dec1be4f95067bc707c7a

Yes I saw Stefan's patch on pve-dev (and his CC), I looked to patch it 
myself until I realized it was on a C source ;)

Thanks for publishing to pve-test so fast. I just installed that package 
and its dependency:
http://download.proxmox.com/debian/pve/dists/buster/pvetest/binary-amd64/libproxmox-backup-qemu0_1.0.3-1_amd64.deb

on that node, and can confirm IT IS FIXED for me. Tried with both ceph 
storages, both report correct sha256sum now.

Thanks a lot!!

-- 


      EnekoLacunza

Director Técnico | Zuzendari teknikoa

Binovo IT Human Project




	943 569 206 <tel:943 569 206>

	elacunza at binovo.es <mailto:elacunza at binovo.es>

	binovo.es <//binovo.es>

	Astigarragako Bidea, 2 - 2 izda. Oficina 10-11, 20180 Oiartzun




	
youtube <https://www.youtube.com/user/CANALBINOVO/> 	
	linkedin <https://www.linkedin.com/company/37269706/>