We figured it out, it's because the hooks are run inside the LXD snap mntns which we modify to have our own copy of etc. snapctl then ends up following a symlink in our modified /etc causing the issue.
Adding system-observe to the hook should do the trick. ** Changed in: snapd Status: New => Invalid ** Changed in: snapd (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1863772 Title: apparmor missing read permission for /var/lib/snapd/hostfs/usr/lib/os- release To manage notifications about this bug go to: https://bugs.launchpad.net/snapd/+bug/1863772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs