How to migrate PBS 3 from co-installation to LXC?

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So far, I have two nodes running PBS 3 co-installed with PVE 8 (one on-site, one off-site; off-site only used as sync for on-site PBS). I'd like to change that and move PBS into an LXC on each node while keeping all backups, of course (and then update to PBS 4 and PVE 9). What is the easiest way to do this?

I'd think creating an LXC for PBS, installing PBS 3, then passing the mounted HDD in on the same mount point as before and copying config/log files should do the trick? Then I'd need a list of all files to copy and I'm unsure about that.
After that I'd check if the setup still works with PBS 3 and continue migrating to PBS 4 and PVE 9.

Aside from that, would a VM be suited better?

Thank you!

(Using the other node to migrate one node through resyncing is not an option as the connection between the nodes is very slow (16Mbit) and it's TBs of data.)

 

[Onslow]

Aside from that, would a VM be suited better?

I have no answer to the earlier questions and I have no experience with PBS as LXC.
But searching for something today I have noticed an old thread with Fiona's (a Proxmox Staff Member) post

[SOLVED] Post in thread 'Permission denied (os error 13) on VM backup'

Aug 7, 2023

Hi,
how is the storage inside your Proxmox Backup Server set up? Does the backup user have all the necessary permissions on the datastore? If you can't use a dedicated host for PBS, using a VM instead of a container is slightly preferable, because of better isolation.

• fiona

containing this fragment:

"If you can't use a dedicated host for PBS, using a VM instead of a container is slightly preferable,
because of better isolation."

This is from 2023 and I don't know whether this recommendation is still valid, but I've thought I'll share it.