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-rw-r--r--docs/PORTABLE_SERVICES.md12
1 files changed, 8 insertions, 4 deletions
diff --git a/docs/PORTABLE_SERVICES.md b/docs/PORTABLE_SERVICES.md
index 2dbeeee760..5b6c085af0 100644
--- a/docs/PORTABLE_SERVICES.md
+++ b/docs/PORTABLE_SERVICES.md
@@ -89,8 +89,9 @@ If you have portable service image, maybe in a raw disk image called
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
@@ -170,8 +171,11 @@ requirements are made for an image that can be attached/detached with
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