Assistance Needed with Expanding ZFS Pool on OPNsense VM

[eleanor-fiona]

I am currently running OPNsense version [insert version here] on a Proxmox VM and have encountered an issue with expanding my ZFS pool. I initially allocated 10GB to the VM, but OPNsense only recognizes 1.62GB, and I am unable to expand the pool to use the full disk space.

Here's a summary of what I've done and the issues I've encountered:

- Installed OPNsense on a VM with a 10GB disk, but OPNsense only sees 1.62GB.
- Tried to expand the ZFS pool using various methods (zpool online -e, zfs list, etc.), but the system does not recognize the free space.
- Attempted to force export (zpool export -f) and destroy (zpool destroy zroot) the pool, but it fails to unmount the root filesystem.
- Backed up the entire ZFS pool to a USB stick successfully.
- Running in single-user mode did not resolve the issue.

I am looking for a way to expand my ZFS pool without having to reinstall OPNsense, as I would like to avoid this if at all possible.

Any assistance or insight the community can provide would be greatly appreciated.

[Free_Norway]

Hi Eleanor-Fiona

I have Opnsense running on a Proxmox the last 8-9 years.

Question:

• - when installing Opnsense from DVD/image, did you see the 10G size of the virtual disk
• - did you change the disk size in Proxmox after installation of Opnsense

What do you see in the dashboard of OPnsense under Disk usage?
What does the output of the "df" command give you?

Kind regards
Sebastian

[Patrick M. Hausen]

I am currently running OPNsense version [insert version here] on a Proxmox VM and have encountered an issue with expanding my ZFS pool. I initially allocated 10GB to the VM, but OPNsense only recognizes 1.62GB, and I am unable to expand the pool to use the full disk space.

That's probably because the installer put an 8 GB swap partition on that same virtual boot drive. Please post the output of

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gpart show from a shell in your OPNsense VM.

Can you afford to allocate another, say, 10 GB to that virtual disk in Proxmox? That would be the easiest way. I can tell you how to expand the zpool from within the VM once you answered both these questions.

Kind regards
Patrick

[majestic]

Not OP, but I have the same issue using Hyper-V.

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$gpart show
=>      40  20971440  da0  GPT  (10G)
        40    532480    1  efi  (260M)
    532520      1024    2  freebsd-boot  (512K)
    533544       984       - free -  (492K)
    534528  16777216    3  freebsd-swap  (8.0G)
  17311744   3657728    4  freebsd-zfs  (1.7G)
  20969472      2008       - free -  (1.0M)

I can afford to allocate another, say, 10 GB to that virtual disk in Hyper-V. Any help to expand the zpool from within the VM would be appreciated.

Thank you.

[Patrick M. Hausen]

Expand the disk, then use gpart recover to fix the backup GPT table, then gpart resize to resize the ZFS partition. It's not hard.

Probably, untested and from memory:

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gpart recover da0
gpart resize -i 4 da0
If ZFS does not automatically recognize the new space, then maybe

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zpool online -e zroot da0p4will do the trick.

None of these commands is destructive, just go ahead and try them. Report back if my memory failed me and anything isn't working.

[majestic]

That worked great. Thanks for all your help.