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Create a simple container image based on Tumbleweed using OBS (openSUSE Build Service)

Create the project to host the assets​

In this case it will be a subproject of the "home:foobar" project

  • Go to https://build.opensuse.org/
  • Log in
  • Select "Your Home Project" (Left Nav menu)
  • Select the "Subprojects" tab
  • Press "Create Subproject" (In Left Nav menu);
  • Fill in the name (e.g. containers).

Enable container builds in the project config​

  • Select "Your Home Project" (Left Nav menu)
  • Select the "Subprojects" tab
  • Select the subproject you have created (e.g. containers)
  • Select the "Project Config" tab
  • Paste the following code:
%if "%_repository" == "images"
Type: docker
Repotype: none
Patterntype: none
BuildEngine: podman
%endif

Add the Tumbleweed images repository​

  • Go to the subproject home page (e.g. https://build.opensuse.org/repositories/home:foobar:containers)
  • Select the "Repositories" tab
  • Press the "Add from a Project" button
  • Fill in "Project" field with "openSUSE:Templates:Images:Tumbleweed"
  • Choose "images" in Repositories dropdown
  • Rename it as "images" (this is important as it will be later on used in the registry path)
  • Unselect all the architectures you don't need

Create a package for the subproject​

Create the Dockerfile​

Create a simple Dockerfile locally, something like:

# The container image tag needs to be specified as follows:
#!BuildTag: mytoolbox:latest
 
FROM opensuse/tumbleweed
RUN zypper -n in traceroute iputils netcat-openbsd curl && \
    zypper clean -a

Upload the Dockerfile​

Build results​

Resulting images​

If everything went as it should, the container image will be hosted at the openSUSE registry

  • Go to https://registry.opensuse.org/
  • On the search bar, type "project=^home:foobar:" and press enter
  • Click on the package icon or name (home/foobar/containers/images/mytoolbox)
  • Expand the tag (latest) to see the Image IDs, arch, build time, etc as well as the podman pull command.

Modify the Dockerfile file via CLI​

  • Install osc via your favourite package manager (see https://en.opensuse.org/openSUSE:OSC)
  • Run osc checkout home:foobar:containers. It will ask your username/password and a method to store the password safely.
  • Navigate to the downloaded project cd home\:foobar\:containers/mytoolbox/
  • Edit the Dockerfile as you please
  • Run osc commit and put a proper commit message
  • The build will be automatically triggered