But with this same setup (LXD 3 with Snap) on my Raspberry Pi (Ubuntu Server 20.04), adding the same proxy device doesn’t work, I can not see the port listening, and I can not access to apache from another computer:
I have switched from Ubuntu Server 20.04 to Ubuntu Core 18, and installed LXD 3 and I have the same problem.
Investigating, I realized that stgraber comments that this error with the proxy device occurs in version 3.0.4 (which is the one I have) and was fixed in later version 3.0.5. This comment can be found here: Ubuntu 19.04 proxy dev fail, "read-only filesystem"
I wanted to ask you if this deduction that I have obtained is correct, and if so, It is possible to install 3.21 version as snap? On my Funtoo Linux I have that version, but on my Raspberry with Ubuntu Core or Ubuntu Server 20.04 the last version I can see with “snap info lxd” is 3.0.4.