[openstack-dev] There is no Jenkins, only Zuul

Thomas Goirand zigo at debian.org
Thu Jun 16 23:48:08 UTC 2016

On 06/17/2016 12:41 AM, James E. Blair wrote:
> Since its inception, the OpenStack project has used Jenkins to perform
> its testing and artifact building.  When OpenStack was two git repos,
> we had one Jenkins master, a few slaves, and we configured all of our
> jobs manually in the web interface.  It was easy for a new project
> like OpenStack to set up and maintain.  Over the years, we have grown
> significantly, with over 1,200 git repos and 8,000 jobs spread across
> 8 Jenkins masters and 800 dynamic slave nodes.  Long before we got to
> this point, we could not manage all of those jobs by hand, so we wrote
> Jenkins Job Builder[1], one of our more widely used projects, so that
> we could automatically generate those 8,000 jobs from templated YAML.
> We also wrote Zuul[2].
> Zuul is a system to drive project automation.  It directs our testing,
> running tens of thousands of jobs each day, responding to events from
> our code review system and stacking potential changes to be tested
> together.
> We are working on a new version of Zuul (version 3) with some major
> changes: we want to make it easier to run jobs in multi-node
> environments, easier to manage large numbers of jobs and job
> variations, support in-tree job configuration, and the ability to define
> jobs using Ansible[3].
> With Zuul in charge of deciding which jobs to run, and when and where
> to run them, we use very few advanced features of Jenkins at this
> point.  While we are still working on Zuul v3, we are at a point where
> we can start to use some of the work we have done already to switch to
> running our jobs entirely with Zuul.
> As of today, we have turned off our last Jenkins master and all of our
> automation is being run by Zuul.  It's been a great ride, and
> OpenStack wouldn't be where it is today without Jenkins.  Now we're
> looking forward to focusing on Zuul v3 and exploring the full
> potential of project automation.
> [1] http://docs.openstack.org/infra/jenkins-job-builder/
> [2] http://docs.openstack.org/infra/zuul/
> [3] https://www.ansible.com/

What will be the faith of jenkins job builder then? It is already used
by lots of people, including some Debian folks. Will it be maintained?


Thomas Goirand (zigo)

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