Building on Ubuntu with base bare image fails to add user and group

[arturo-seijas]

Hi!

I currently have the following rockcraft.yaml where rockcraft pack is failing due to the files /etc/group and /etc/passwd not being present. Considering the I'm building on Ubuntu I would have expected those two files to be added to the bare image and staged.

name: indico-nginx
summary: Indico nginx rock
description: Nginx OCI image for the Indico charm
version: "1.0"
base: bare
build-base: ubuntu:22.04
license: Apache-2.0
platforms:
  amd64:
parts:
  add-user:
    plugin: nil
    overlay-script: |
      groupadd -R $CRAFT_OVERLAY --gid 2000 nginx
      useradd -R $CRAFT_OVERLAY --system --gid 2000 --uid 2000 --no-create-home nginx

Related to #23

Thank you

[tigarmo]

$CRAFT_OVERLAY has the mounted base, which in your case is bare. groupadd is complaining about the missing /etc, so you can fix that one:

    overlay-script: |
      mkdir $CRAFT_OVERLAY/etc
      chmod 755 $CRAFT_OVERLAY/etc
      groupadd -R $CRAFT_OVERLAY --gid 2000 nginx
      useradd -R $CRAFT_OVERLAY --system --gid 2000 --uid 2000 --no-create-home nginx

Because of the bare base, the resulting ROCK has just those two files (plus pebble).

[arturo-seijas]

That did the trick, thank you. I had tried adding the repository but it was failing due to the permission issues.