| AMI | Amazon Machine Image (image type) |
| Blueprint | Definition of customizations in the image |
| Compose | Request from the user that produces one or more images. Images in a single compose are, in theory, the same, but for different platforms, such as Azure or AWS. In practice they are slightly different because every cloud platform requires a different package set and system configuration. osbuild-composer running the Weldr API can only create one image at a time, so one compose maps directly to one image build. It can map to multiple image builds when used with other APIs, such as the Koji API. |
| Composer API | HTTP API meant as publicly accessible (over TCP). It was created specifically for osbuild-composer and does not support some Weldr features like blueprint management, but adds new features like building different distros and architectures. |
| GCP | Google Cloud Platform |
| Image Build | One request from osbuild-composer to osbuild-worker. Its result is a single image. |
| Image Type | Image file format usually associated with a specific use case. For example: AMI for AWS, qcow2 for OpenStack, etc. |
| Manifest | Input for the osbuild tool. It should be a precise definition of an image. See https://github.com/osbuild/osbuild/blob/main/docs/osbuild-manifest.5.rst for more information. |
| osbuild | Low-level tool for building images. Not meant for end-user usage. |
| osbuild-composer | HTTP service for building OS images. |
| OSTree | Base technology for immutable OS images: Fedora IoT and RHEL Edge |
| Repository overrides | osbuild-composer uses its own set of repository definitions. In case a user wants to use custom repositories, "overrides" can be created in /etc/osbuild-composer |
| Weldr API | Local HTTP API used for communication between composer-cli/cockpit-composer and osbuild-composer. It comes from the lorax-composer project. |