[SOLVED] existing zpool isn't recognized by pbs

[s.gruner]

Hello,

we already have a backupserver with a zfs backend in use. Until today, we are doing our pve-cluster full backups via smb on this target, but we want to use the pbs in future to profit from incremental backups and other features.

I installed the pbs on top our existing VM backup server, following the documentation, and everything worked fine, first.

root@serverxyz:~# proxmox-backup-manager versions
proxmox-backup-server 1.0.5-1 running version: 1.0.5

I can access the webinterface, all disks are shown, but our existing zfspool isn't shown in the zfs tab.



the same happens on the commandline:

root@serverxyz:~# proxmox-backup-manager disk zpool list
Error: unable to parse zfs list output - 0: at line 1, in Eof:
zfspool    668503069687808    90599528423424    577903541264384    -    0    13    1.00    ONLINE    -

but our zfspool is OK and in use:

root@serverxyz:~# zpool list
NAME      SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
zfspool   608T  82,4T   526T         -     0%    13%  1.00x  ONLINE  -

root@serverxyz:~# zpool status
  pool: zfspool
 state: ONLINE
  scan: scrub repaired 0B in 33h54m with 0 errors on Mon Nov  9 10:18:25 2020

i created an extra zfs fs with the intention to use it as datastore for the pbs:

root@serverxyz:~# zfs list
NAME              USED  AVAIL  REFER  MOUNTPOINT
zfspool          67,6T   416T  2,57G  /zfspool
zfspool/backup   45,2T   416T  45,2T  /zfspool/backup
zfspool/pbs      59,6M   416T  59,6M  /zfspool/pbs
zfspool/proxmox  22,4T   416T  22,4T  /zfspool/proxmox

all i can do is add the path "/zfspool/pbs" as a datastore an this seem to work, but i dont know if this is the intended way.

i didn't found anything to my specific problem, so has anyone any suggestions?

thanks for all the help,

kind regards
sebastian

 

[fiona]

Hi,
the list commands fail, because there is one less column for the pre-existing pool. A newly created pool on PBS will have a CKPOINT column:

# zpool list
NAME      SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
zfspool  31.5G  24.8M  31.5G        -         -     0%     0%  1.00x    ONLINE  -

I'll take a look and hopefully it's not hard to fix.

Yes, you can just add a path to some ZFS filesystem, the pool view is informational only, apart from the ability to initially create a pool. What matters to PBS is having a filesystem it can work with.

 

[fiona]

I forgot to ask, which version of ZFS are you running (apt show zfsutils-linux)? Does it work if you upgrade to version 0.8.5-pve1?

 

[s.gruner]

Hi,

thanks for the reply, here is the requested output:

root@serverxyz:~# apt show zfsutils-linux
Package: zfsutils-linux
Version: 0.8.5-pve1
Priority: optional
Section: contrib/admin
Source: zfs-linux
Maintainer: Proxmox Support Team <support@proxmox.com>
Installed-Size: 1.267 kB
Provides: zfsutils
Depends: python3, libblkid1 (>= 2.16), libc6 (>= 2.17), libnvpair1linux (>= 0.8.5), libudev1 (>= 183), libuuid1 (>= 2.16), libuutil1linux (>= 0.8.5), libzfs2linux (>= 0.8.5), libzpool2linux (>= 0.8.5), zlib1g (>= 1:1.1.4)
Recommends: lsb-base, zfs-zed
Suggests: nfs-kernel-server, samba-common-bin (>= 3.0.23), zfs-initramfs
Conflicts: zfs, zfs-fuse
Homepage: https://www.zfsonlinux.org/
Download-Size: 368 kB
APT-Sources: http://download.proxmox.com/debian/pbs buster/pbs-no-subscription amd64 Packages
Description: command-line tools to manage OpenZFS filesystems
OpenZFS is a storage platform that encompasses the functionality of
traditional filesystems and volume managers. It supports data checksums,
compression, encryption, snapshots, and more.
.
This package provides the zfs and zpool commands to create and administer
OpenZFS filesystems.

N: Es gibt 4 zusätzliche Einträge. Bitte verwenden Sie die Option »-a«, um sie anzuzeigen.

ok, and i've seen what you mean, i have also installed an older version. i will try the update and report back.

thanks so far.

 

[s.gruner]

thanks for your help,

it was quite a hassle to finish this. i originally installed the proxmox-backup-server package, because i wanted to keep my original system with kernel and everything.
an upgrade of the zfsutils-linux package to the latest version was not possible because of some dependency issues to the zfs-dkms and spl-dkms packeges installed before. after a backup of my system, a cleanup of the old packages and the installation of the proxmox-backup package finnaly everything seems to work now.



thanks again for your help.
kind regards

sebastian

 

[s.gruner]

little installation post update: i had to import my zpool again after the installation of the proxmox-backup package.