this post was submitted on 17 Dec 2025
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moved from truenas core to scale a month or two ago, and it's been a struggle. anyone else having issues running a truenas scale VM under proxmox? (piefed.zeromedia.vip)
submitted 4 days ago* (last edited 4 days ago) by fleem@piefed.zeromedia.vip to c/selfhosted@lemmy.world
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UPDATE EDIT:
Man it is crazy to watch the dashboard and console at the time. Even with no HDD's spinning, and as much RAM as I can give the Scale VM, services just slowly takes over the RAM, until the console shows kernel panic.

core was solid for so long with everything i threw at it.

it runs out of memory after services soaks up all the RAM, ZFS cache is choked down to 3gb out of 16.

  • xeon E3 1265LV2
  • Asus p8z77-v-deluxe
  • 32GB DDR3
  • hba passed through to truenas running a mirror pool

VM for truenas is running on the local proxmox SSD.

  • proxmox 9.1.1
  • TrueNAS scale 25.10.0.1 but i tried a 24 version also

once the install starts crashing, the VM will still crash after booting up without the HBA card

I've seen a few posts with other people having the out of memory issues (OOM) but almost every reply says it will be fixed in the next update, which is older than what we've got now.

it did run okay enough JUST long enough to make the mistake of updating the ZFS flags, so now i can't roll back to core.

does scale have this issue because it's virtualized? would it run better on bare metal?

anyone tried xigmaNAS? freeBSD based again at least.

Unraid looks okay, but paywall?

open media vault?

any advice or discussion is appreciated!

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[–] monkeyman512@lemmy.world 3 points 4 days ago (2 children)

I have TN Scale VM hosted in Proxmox. The only "issue" I have is the webgui gets pushed to SWAP if not used for more than a week. So when I connect it it literally takes a couple minutes while is gets shuffled back into RAM. Once it's "warmed up" it's fine. But my Scale VM is doing these things: manage ZFS pools, control NFS/Samba shares, replicate pool snapshots to off-site backup server. It intentionally have it do nothing else. All other services are in different VMs or LXC containers in Proxmox.

Does your Scale install have any SWAP space setup? That should prevent out of memory issues. Potential performance issues would be better than crashing.

[–] fleem@piefed.zeromedia.vip 1 points 4 days ago (1 children)

man i didn't even know VM's on proxmox could have swap space, here i go learnin again

[–] monkeyman512@lemmy.world 2 points 4 days ago

It will be controlled by Truenas not Proxmox. Truenas can add swap space to each drive automatically: https://www.ixsystems.com/documentation/truenas/11.3-U2.2/storage.html

But you probably already have existing drives so that doesn't help. This might though: https://wiki.debian.org/Swap

But be aware that Truenas is design to be an appliance and doesn't really want you tinkering under the hood. So you may have to manually add the SWAP after each boot of TN.

I would guess the best long term fix would be moving services out of the TN VM and into a different VM.