Anyone do this with success? I tried setting it up on TN Scale and couldn’t discover any devices. After some digging it sounds like that’s a common occurrence.
I know I’m not answering your question, but for what it’s worth, I’ve run TrueNAS Scale and HAOS as VM’s on Proxmox for years without issue. I prefer to let my storage be storage and run a dedicated hypervisor.
If you’re connecting drives to TrueNAS via a HBA card then virtualising TrueNAS in Proxmox is straightforward, just pass the whole card through to the VM and TrueNAS is none the wiser. The added overhead for Proxmox is (almost) negligible.
Spin up a dedicated VM for HAOS, or whatever flavour OS you like and use docker.
I actually started using HomeAssistant on TrueNAS Core a few years ago. From my understanding the best way to do this now it’s to use the TrueNAS X86-64 ISO in a VM. The TrueNAS docker system seems to be integrated differently than a standard docker installation on an os like Debian.
If you really want to keep using docker on TrueNAS you should create users with unique ID’s in TrueNAS and give them permission to access the needed resources. Those ID’s also need to match the user in the Docker container.
I personally use HomeAssistant on an Odroid N2+ and haven’t made the switch to TrueNAS Scale so I can’t be much help beyond that.