omnibus-gitlab uses the omnibus tool for
building packages for the supported operating systems. The omnibus tool will detect
the OS where it is being used and build packages for that OS. It is recommended
to use a Docker container corresponding to the OS as the environment for building
How to build a custom package locally is described in the dedicated document.
The GitLab all-in-one Docker image uses the
omnibus-gitlab package built for
Ubuntu 20.04 under the hood. The Dockerfile is optimized to be used in a CI
environment, with the expectation of packages being available over the Internet.
We’re looking at improving this situation in issue #5550.
How to build an all-in-one Docker image locally is described in the dedicated document.