I'm running Proxmox VE 8.2.7. I have a TrueNAS Core VM, and a few of my unprivileged LXCs access an NFS share provided by the TrueNAS VM via a bind mount.
The solution I ended up with is using autofs to mount the TrueNAS VM's share to the Proxmox host and then bind mount that share to the unprivileged LXCs. To get this to work, I have to use a startup delay of 30-60 seconds after the VM starts, or the LXCs will fail to boot (since the bind mount directory doesn't exist instantaneously)...
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The solution I ended up with is using autofs to mount the TrueNAS VM's share to the Proxmox host and then bind mount that share to the unprivileged LXCs. To get this to work, I have to use a startup delay of 30-60 seconds after the VM starts, or the LXCs will fail to boot (since the bind mount directory doesn't exist instantaneously)...
Read more