Ceph support

[CvH]

I am currently starting to fiddling around to create some proper proxmox backup solution for our servers. We are using ceph as storage, that is not yet supported at this script.

I have no idea yet if I can use this script (if so I pr the changes), if not I wanted to to archive at least what is needed to get ceph support. Might be helpful for someone.

We are currently doing a hacky approach that works, for us, too. The excludes are important, the OSDs are typical including TB of data.

tar -cPvf "/path/backup.tar" \
  --exclude='/var/lib/ceph/osd/ceph*/*' \
  --exclude='/var/lib/ceph/tmp' \
  /etc/ \
  /root/ \
  /var/lib/ceph/ \
  /var/lib/corosync/ \
  /var/lib/pve-cluster/

For restore these files are important, otherwise your OSDs won't work.

/etc/ceph/
/etc/systemd/system/ceph-mgr.target.wants/ceph-mgr@*.service
/etc/systemd/system/ceph-mon.target.wants/ceph-mon@*.service

[DerDanilo]

This is a good idea! I suggest we allow to enable Ceph config backup with a boolean switch. This way the script won't fail if ceph is not being used. There are not many files that are to be backed up from Ceph. It should also not include the MON data. This backup script's idea is purely for config files and should stay this way, at least that is what I think (for now).

I'd rather suggest to define important Ceph files directly. The ceph.conf doesn't also contain all currently active config parameter since CLI overwrites could have happened. So it's advisable to export the current config maybe to /tmp and take it from there.

Suggestion in general: We are using croit.io mostly for Ceph clusters since it's way easier to manage and has a config backup build in. It has a free option if RBD is enough. But even the minimum license pricing is affordable since it safes ton's of hours maintaining a Ceph cluster. Please contact me directly if you are interested. The PVE ceph integration is fine but I don't like to use it since it lacks a lot of features and mgmt options.

[DerDanilo]

@CvH Please open a PR so we can get this integrated. I'd like to have the ceph part purely option. There could be a command line switch to include ceph releated config for example.

[CvH]

It works at production servers so I can not test here anything easily.

I have a script that works but has no switches included - a bit ugly but works. I can post my current approach if this helps.

[DerDanilo]

That might help. Please create PR and try to integrate your code. It may take some time but we'll get that integrated if it works

[DerDanilo]

@CvH Are you still up for a PR? I might find some time soon to check on that, even though I am not using (and would not recommend) Ceph managed by PVE.

[DerDanilo]

@CvH Are you still interessted to share your code? Otherwise I'll close this issue.