Comment 3 for bug 2057888

You are currently building the image based on a existing tarball (see https://pastebin.ubuntu.com/p/mM8Dh7tSXh/). The `/var/lib/snapd/state.json` file (see https://pastebin.ubuntu.com/p/jcQcC73wrd/plain/) contains lxd in it.

> By deafult, there is lxd and core20 snap in that file(var/lib/snapd/state.json)

What do you mean? Is that because lxd is in `/var/lib/snapd/state.json`?

I suppose you could maybe remove lxd from the state.json before building the image. I understand in the hook you mention the solution was to completely nuke snapd, remove the state.json file and reinstall snapd. It feels a bit extreme and I suspect we might lose some information.

I will need to think more about it to define what would make sense in ubuntu-image. I am not sure a flag to skip/remove the existing `/var/lib/snapd/state.json` would be the best idea. If we take a step back I think here we are trying to deal with an "imperfect" pre-existing tarball rootfs. I need to determine what we want to support in ubuntu-image and even if this is the responsibility of ubuntu-image to fix this.