5a8e4d84e2
The kazoo client can spawn a number of background threads to perform async tasks without blocking foreground operation. In particular, this allows its main thread to keep up with ZK traffic which may trigger callbacks, and then if those callbacks need to perform operations which take time (or cause ZK traffic themselves) they will spawn threads for these operations. Watches set session callbacks which refresh their data. If a ZK session is reset, then kazoo will call all of these callbacks, each of which may spawn a thread to refresh its data. This can easily lead to spawning too many threads and/or running out of memory. To alleviate this, use a threadpool executor in the kazoo client when spawning background operations. We allow 10 workers for this. The watches (which we vendor) are updating so that their throwaway operations use the thread pool executor, but the long-running background threads are top-level threads as usual. Change-Id: Ie90f904342f6261859a875e75b1ea14e2238f895
Zuul
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
If you are looking for the Javascript testing tool named Zuul, it can be found here: https://github.com/defunctzombie/zuul
Getting Help
There are two Zuul-related mailing lists:
- zuul-announce
-
A low-traffic announcement-only list to which every Zuul operator or power-user should subscribe.
- zuul-discuss
-
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.
Contributing
To browse the latest code, see: https://opendev.org/zuul/zuul To clone the latest code, use git clone https://opendev.org/zuul/zuul
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 promptedJoin #zuul on Freenode to discuss development or usage.
License
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.