This command does the following:
-1. It dissects the image, checks and validates the `/etc/os-release` data of
- the image, and looks for all included unit files.
+1. It dissects the image, checks and validates the `/etc/os-release`
+ (or `/usr/lib/os-release`, see below) data of the image, and looks for
+ all included unit files.
2. It copies out all unit files with a suffix of `.service`, `.socket`,
`.target`, `.timer` and `.path`. whose name begins with the image's name
image. (The implementation will check a couple of other paths too, but it's
recommended to use these two paths.)
-4. The image must contain an os-release file, either in /etc/os-release or
- /usr/lib/os-release. The file should follow the standard format.
+4. The image must contain an os-release file, either in `/etc/os-release` or
+ `/usr/lib/os-release`. The file should follow the standard format.
+
+5. The image must contain the files `/etc/resolv.conf` and `/etc/machine-id`
+ (empty files are ok), they will be bind mounted from the host at runtime.
Note that generally images created by tools such as `debootstrap`, `dnf
--installroot=` or `mkosi` qualify for all of the above in one way or