The canMerge check is executed whenever zuul tests if a change can enter a gate pipeline. This is part of the critical path in the event handling of the scheduler and therefore must be as fast as possible. Currently this takes five requests for doing its work and also transfers large amounts of data that is unneeded: * get pull request * get branch protection settings * get commits * get status of latest commit * get check runs of latest commit Especially when Github is busy this can slow down zuul's event processing considerably. This can be optimized using graphql to only query the data we need with a single request. This reduces requests and load on Github and speeds up event processing in the scheduler. Since this is the first usage of graphql this also sets up needed testing infrastructure using graphene to mock the github api with real test data. Change-Id: I77be4f16cf7eb5c8035ce0312f792f4e8d4c3e10
Zuul is a project gating system.
The latest documentation for Zuul v3 is published at: https://zuul-ci.org/docs/zuul/
If you are looking for the Edge routing service named Zuul that is related to Netflix, it can be found here: https://github.com/Netflix/zuul
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 in the #zuul channel on Freenode IRC.
Bugs are handled at: https://storyboard.openstack.org/#!/project/zuul/zuul
Suspected security vulnerabilities are most appreciated if first reported privately following any of the supported mechanisms described at https://zuul-ci.org/docs/zuul/user/vulnerabilities.html
Code reviews are handled by gerrit at https://review.opendev.org
After creating a Gerrit account, use git review to submit patches. Example:
# Do your commits $ git review # Enter your username if prompted
Join #zuul on Freenode 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.