Accessing and Contributing to Source

Container-Optimized OS from Google is built on top of the Chromium OS open-source project. You can find the majority of the source code for Container-Optimized OS in the COS repositories

Some of the useful resources that can help you determine the source code used to build the image include:

        $ gsutil ls gs://cos-tools/11021.11.0/

The Chromium OS Build FAQ and other Chromium OS Build documentation explains how the build system and package mirrors work.

Building from source

Follow the instructions on Building from Open Source to build a Container-Optimized OS disk image from the source.

Contributing to source code

See for instructions on contributing code to the main Chromium repository.