I am new, but found this forum pretty informative so far. Maybe someone with more knowledge can give me a recommendation on the following thought:
a) I have a production server running Proxmox on ZFS (a mirror pool for VMs and a raidz2 pool for datasets)
b) I just installed my backup server with Debian 12 on a single raidz2 pool. I added syncoid in pull mode that connects to Proxmox as a specific user with limited rights (through ZFS delegation) to pull new ZFS snapshots.
Now I want to automate snapshots on Proxmox. (I think) I have two choices:
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Either install Sanoid on Proxmox. This would be the straight-forward way and would probably work, but I would like to avoid installing additional scripts/tools on Proxmox.
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… or install Sanoid in an unprivileged or privileged LXC.
It is unclear whether snapshotting works from inside LXC. This answer:
suggests it is possible… if all datasets are bind-mounted inside the LXC.
There are also reports that ZFS snapshotting will work in unprivileged containers soon, using ZFS delegation:
… but there is a comment from Oct1, 2023 that suggests that snapshots from privileged containers is not supported.
Another completely different solution could be to run cv4pve-autosnap inside an LXC.
Since cv4pve-autosnap uses the Proxmox API, the tool doesn’t require ZFS access from within the container and won’t work if the host is down.
But I could not find out whether cv4pve-autosnap supports snapshotting of arbitrary ZFS dataset paths (e.g. my data pool), or only works for container-connected ZFS volumes (I think not because it requires a parameter called vmid).
Long story, I tend to install Sanoid on the Proxmox Hypervisor. Thumbs up or thumbs down?