Comment 18 for bug 1712808

Looks like that the error message is quite misleading... Installing and running snaps in privileged containers works quite well, the problem is that apparently udev needs `/lib/modules/` to be available.

In fact, in a completely new privileged LXD instance:

ubuntu@ubuntu-bp:~$ sudo snap install hello
error: cannot perform the following tasks:
- Setup snap "core" (11993) security profiles (cannot reload udev rules: exit status 2
udev output:
)
ubuntu@ubuntu-bp:~$ sudo mkdir /lib/modules
ubuntu@ubuntu-bp:~$ sudo snap install hello
Download snap "core" (11993) from channel "stable" \error: change finished in status "Undone" with no error message
ubuntu@ubuntu-bp:~$ sudo snap install hello
2021-12-02T13:36:05Z INFO Waiting for automatic snapd restart...
hello 2.10 from Canonical✓ installed
ubuntu@ubuntu-bp:~$ hello
Hello, world!

So I think that this issue is really easy to fix, we just need to ensure that such directory is there.