The osbuild system is a group of applications, APIs, specifications, and
implementations to build images of Linux operating systems in an isolated
and reliable way. Ready to be deployed to your favorite cloud provider,
private hypervisor, or disk-media.
Tasks are split out across a multitude of tools, here's a quick rundown of what each of them does.
At the core of the project is the osbuild project. This provides the build pipelines.
osbuild-composer is the higher level translation layer between front end tools and osbuild. It provides APIs that can be used by web-frontends, cli-tools, and provides osbuild workers that perform the build pipelines.
The composer-cli (called
weldr-client for historical reasons). Is one of the clients for
osbuild-composer. It provides a command line interface to the exposed APIs.
This is the console.redhat.com HTTP API that speaks to osbuild-composer and
translates it for the image-builder-frontend.
The frontend for console.redhat.com, it gets data from image-builder.
osbuild-getting-started tries to make it as easy as possible to both build RPMs of anything in the osbuild ecosystem as to run it (after you've built it).
You should be all set with the following which drops you into the
composer-cli where you can build an image or play around:
[root@desktopa osbuild-getting-started]# make setup-host
# ...
[root@desktopa osbuild-getting-started]# make run
Makefile: build/osbuild-composer: creating ogsc/build/osbuild-composer:v54
Makefile: build/osbuild: creating ogsc/build/osbuild:v57
Makefile: rpms/osbuild: creating rpms for osbuild v57
Makefile: rpms/osbuild-composer: creating rpms for osbuild-composer v54
Makefile: build/weldr-client: creating ogsc/build/weldr-client:v35.5
Makefile: rpms/weldr-client: creating rpms for weldr-client v35.5
Makefile: run/composer: creating ogsc/run/composer:v54
Makefile: run/worker: creating ogsc/run/worker:v54_v57
Makefile: run/cli: creating ogsc/run/cli:v35.5
run.py: env: starting `composer` container at 'v54'
run.py: env: `composer` container has ip '10.88.0.59'
run.py: env: starting `worker` container at 'v54'/'v57'
run.py: env: starting `cli` container at 'v35.5'
[root@665d08e647e1 composer]# composer-cli blueprints push data/blueprint.toml
[root@665d08e647e1 composer]# composer-cli compose start example-image oci
Compose ec2dab95-4ab7-4674-aa2d-27f992a42922 added to the queue
# ...
[root@665d08e647e1 composer]# composer-cli compose status
ec2dab95-4ab7-4674-aa2d-27f992a42922 FINISHED Tue Jun 7 09:59:39 2022 example-image 0.0.1 oci 2147483648
Docker is used to build the RPMs, to get started make sure your host system
has Docker on it (you can set this up through sudo make setup-host).
When the host system is set up it is time to build some RPMs, the steps are two-fold where a build container is created which we then later use to perform the build in. This allows you to inspect the build environment (but you don't have to).
By default osbuild-getting-started gets the latest tags from the upstream
repositories but these can be overridden:
make build/osbuild osbuild_version=v55
make rpms/osbuild osbuild_version=v55
The first incantation will check out the v55 tag for osbuild and create a
container with all build requirements satisfied. The second command will build
the RPMs, these are available in ./build/rpms afterwards. Note that the first
is a dependency of the second.
€ ls ./build/rpms/
osbuild-55-1.20220505git090f768.fc36.noarch.rpm
python3-osbuild-55-1.20220505git090f768.fc36.noarch.rpm
Building for different versions is done by passing a different version to the
Makefile. If you want to build the main branch you can leave out the version
argument.
To build other things from the ecosystem the format is the same:
make rpms/osbuild-composer osbuild_composer_version=v51
make rpms/weldr-client weldr_client_version=v35
If you've built at least osbuild and osbuild-composer and their RPMs it's time to get things up and running.