osbuild-composer

An HTTP service for building bootable OS images. It provides the same API as lorax-composer but in the background it uses osbuild to create the images.

You can control it in Cockpit or using the composer-cli. To get started on Fedora, run:

# dnf install cockpit-composer golang-github-osbuild-composer composer-cli
# systemctl enable --now cockpit.socket
# systemctl enable --now osbuild-composer.socket

Now you can access the service using composer-cli, for example:

composer-cli status show

or using a browser: http://localhost:9090

API documentation

Please refer to the lorax-composer's documenation as osbuild-composer is a drop-in replacement.

High-level overview

Frontends

osbuild-composer is meant to be used with 2 different front-ends. The primary one, which is meant for general use, is cockpit-composer. It is part of the Cockpit project and unless you have a strong reason not to use it, you should use it. composer-cli is a command line tool that can be used with osbuild-composer.

Compose

• Compose is what the user submits over one of the frontends
• It contains of one or more image builds
• It contains zero or more upload actions

Image build

• The resulting image has a type: https://github.com/osbuild/osbuild-composer/blob/master/internal/distro/fedora30/distro.go#L19
• Running build in osbuild-composer is referred to as a "job" (internal terminology, not related to end-user experience)

Job

• What composer submits to a worker
• Is a unit of work performed by osbuild (internally it is a single execution of osbuild)
• Consists of one image build and zero or more Upload actions

Image type

• In the cockpit-composer, for examples these are image types:
  • Openstack
  • Azure
  • AWS
• As of now, we name them internally by their file format: vhd, ami, etc.
• You can see a list of types by executing: composer-cli compose types

Upload action

• Each image can be, but does not have to be, uploaded to a remote location
• One image can be uploaded to multiple locations