The Gatekeeper, or a project gating system
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Zuul 2806a548b3 Merge "docs: Clarify zuul_console behaviour for Kubernetes job nodes" 5 days ago
doc docs: Clarify zuul_console behaviour for Kubernetes job nodes 6 days ago
etc Remove "sql connection" backwards compatability for database 10 months ago
playbooks Merge "Add tracing tutorial" 2 months ago
releasenotes/notes Merge "Detect errors with non-permitted parent jobs" 2 weeks ago
tests Check if Github detected a merge conflict for a PR 1 week ago
tools Only run yarn build when necessary in tools/ 2 months ago
web Fix config-errors dedicated page 4 weeks ago
zuul Check if Github detected a merge conflict for a PR 1 week ago
.coveragerc Revert "Revert "Switch to stestr"" 5 years ago
.dockerignore Add web/node_modules to dockerignore 4 years ago
.gitignore Use ZooKeeper TLS in tests 2 years ago
.gitreview OpenDev Migration Patch 4 years ago
.mailmap Fix pep8 E127 violations 10 years ago
.stestr.conf Revert "Revert "Switch to stestr"" 5 years ago
.zuul.yaml Remove Ansible 5 2 months ago
COPYING Update README and add GPL license 5 years ago
Dockerfile Revert "Use debian bookworm version of libc-bin" 3 months ago
LICENSE Initial commit. 11 years ago Optimize canMerge using graphql 3 years ago
README.rst Update README to point to Matrix, not IRC 3 weeks ago
TESTING.rst Update unit test container setup and instructions 4 months ago
bindep.txt Bump up to python3.10 5 months ago
reno.yaml Add reno configuration settings 2 years ago
requirements.txt Fix test_ensure_cloned and JWT tests 1 month ago
setup.cfg setup: Replace dash-separated config 3 months ago Partial sync with OpenStack requirements. 9 years ago
test-requirements.txt github: more complete mocking for app setup 1 year ago
tox.ini Update unit test container setup and instructions 4 months ago



Zuul is a project gating system.

The latest documentation for Zuul v3 is published at:

If you are looking for the Edge routing service named Zuul that is related to Netflix, it can be found here:

If you are looking for the Javascript testing tool named Zuul, it can be found here:

Getting Help

There are two Zuul-related mailing lists:


A low-traffic announcement-only list to which every Zuul operator or power-user should subscribe.


General discussion about Zuul, including questions about how to use it, and future development.

You will also find Zuul developers on Matrix <>.


To browse the latest code, see: To clone the latest code, use git clone

Bugs are handled at:!/project/zuul/zuul

Suspected security vulnerabilities are most appreciated if first reported privately following any of the supported mechanisms described at

Code reviews are handled by gerrit at

After creating a Gerrit account, use git review to submit patches. Example:

# Do your commits
$ git review
# Enter your username if prompted

Join us on Matrix to discuss development or usage.


Zuul is free software. Most of Zuul is licensed under the Apache License, version 2.0. Some parts of Zuul are licensed under the General Public License, version 3.0. Please see the license headers at the tops of individual source files.

Python Version Support

Zuul requires Python 3. It does not support Python 2.

Since Zuul uses Ansible to drive CI jobs, Zuul can run tests anywhere Ansible can, including Python 2 environments.