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<h2>Zuul Users</h2>
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<p>Are you a Zuul user? Please take a few moments to fill out the <a href="https://openinfrafoundation.formstack.com/forms/zuul_user_survey" target="_blank">Zuul User Survey</a> to provide feedback and information around your deployment. All information is confidential to the Open Infrastructure Foundation unless you designate that it can be public.</p>
<h3>
<a href="https://superuser.openstack.org/articles/ntt-and-kddi-challenges-for-sustainable-infrastructure-transformation/">
KDDI Corporation, NEC, and NTT Group
</a>
</h3>
<p>
KDDI, NEC, and NTT are working together on a solution to validate ETSI conformance for virtualized and containerized network appliance APIs. In order to handle the complexities of integration and configuration reuse, they're relying on Zuul to drive and report on the results of these test workloads.
</p><p>
<a href="https://superuser.openstack.org/articles/ntt-and-kddi-challenges-for-sustainable-infrastructure-transformation/">
See KDDI, NEC, and NTT's TST010 solution in Superuser.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/zuul-a-wazo-platform-case-study/">
Wazo Platform
</a>
</h3>
<p>
Zuul allows Wazo Platform to have cross repository dependencies in pull
requests at the source code level, the Debian packaging level, and at
the container level. Zuul also enables the Wazo team to reuse job
definitions among all the repositories of the same type, which is very
helpful for their organization.
</p><p>
<a href="https://superuser.openstack.org/articles/zuul-a-wazo-platform-case-study/">
Learn more about Wazo Platform at SuperUser.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/zuul-a-t-systems-case-study">
T-Systems
</a>
</h3>
<p>
T-Systems started using Zuul for the development of OpenStack client
components like SDKs, CLIs, and other internal operational software
components. After its team managed to get some changes merged into
Zuul, they deployed it as their continuous integration system. Now, it
is their CI system for the development of all open source tooling it
offers to its clients. Furthermore, Zuul is currently used for
monitoring its platform services quality. For that, its team
periodically execute a set of tests. It also includes monitoring
permanently their RefStack compliance.
</p><p>
<a href="https://superuser.openstack.org/articles/zuul-a-t-systems-case-study">
Read more about T-Systems at SuperUser.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/using-github-and-gerrit-with-zuul-a-leboncoin-case-study/ ">
leboncoin
</a>
</h3>
<p>
Leboncoin, an online "flea market" that is one of the top ten searched
websites in France, uses Zuulv3 with Gerrit. For each review, Zuul is
triggered on three “checks” pipelines: quality, integration and build.
Once results are correct, their engineering team uses the gate system
to merge the code into repositories and build artifacts. They are using
two small OpenStack clusters (3 Controller / 3 Storage / 5 Compute) in
each datacenter. Zuul is currently setup on all Gerrit projects and
some GitHub projects too and runs around 60,000 jobs per month which
means around 2,500 jobs per day. Jobs average time is less than 5
minutes.
</p><p>
<a href="https://superuser.openstack.org/articles/using-github-and-gerrit-with-zuul-a-leboncoin-case-study/ ">
Learn more about leboncoin's Zuulv3 infrastructure in production.
</a>
</p>
<h3>
<a href="https://www.youtube.com/watch?v=YiGip5HTHTg&list=PLKqaoAnDyfgq5YNWZ3Pk9vXf9Smo-gFxw">
Volvo
</a>
</h3>
<p>
An additional development was introduced to Volvo in 2018, namely a
new CI system based on Zuul. The newly introduced CI-based development
chain is referred to as the Volvo Cars ECM CI chain. From
implementation of the software onwards, every single new commit
automatically triggers a set of integration and regression tests. The
changes committed by the developers are validated by running automated
tests against the build. This new development approach fully adheres
to the concept of frontloading quality assurance processes. In
addition, the key objective to reduce the number of post integration
issues to the absolute minimum was achieved fairly quickly.
</p><p>
<a href="https://www.youtube.com/watch?v=YiGip5HTHTg&list=PLKqaoAnDyfgq5YNWZ3Pk9vXf9Smo-gFxw">
Learn more about Volvo's Zuul case from the OpenInfra Summit.
</a>
</p><p>
<a href="https://www.youtube.com/watch?v=ZjY61I-8mpQ&list=PLKqaoAnDyfgo5sOi98QlbMVMhgI_lxFPA">
Watch Volvo discuss their Zuul story on OpenInfra Live.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/zuul-case-study-tungsten-fabric/">
Tungsten Fabric
</a>
</h3>
<p>
Tungsten Fabric, an open source project that serves as a networking
provider for OpenStack, uses Zuul to test every change going into
Tungsten Fabric’s Gerrit review system. It manages the process of
compilation, packaging and containerization of the software. The
VM-based test environments are well suited for them as some of the
tested components need exclusive access to an underlying operating
system. The Git-centric Zuul approach of doing things has helped them
to get to the “version control everything” model, where all the things,
from the CI jobs, through the third-party dependencies to the
infrastructure configuration, are version-controlled, reviewed by team
members and verified by the open source CI system.
</p><p>
<a href="https://superuser.openstack.org/articles/zuul-case-study-tungsten-fabric/">
Learn more about Tungsten Fabric's Zuul use case.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/zuul-case-study-bmw/">
BMW
</a>
</h3>
<p>
BMW has been preparing a centrally hosted CI/CD
instance based on Zuul V3 and many of the projects
using previous CI/CD solutions are already in the
progress of migrating to the new Zuul V3
instance. Hosting many projects on one central
platform has many advantages for operation overhead
and resource sharing in the cloud, but hosting many
projects on one CI/CD instance directly translates to
high stability and availability.
To maximize the availability of their central CI/CD
service, BMW is running
Zuul, <a href="https://zuul-ci.org/docs/nodepool.html">Nodepool</a>
and <a href="https://zookeeper.apache.org/">Zookeeper</a>
services in
an <a href="https://openshift.com/">OpenShift</a>
cluster, hosted on OpenStack. In addition to improved
availability, they have seen several development and
operation benefits for their internal CI/CD
development team.
</p><p>
<a href="https://superuser.openstack.org/articles/zuul-case-study-bmw/">
Read more about BMW at SuperUser.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/zuul-case-study-godaddy">
GoDaddy
</a>
</h3>
<p>
Zuul is in a pilot phase for GoDaddy, primarily in use
for testing their OpenStack deployment automation and also for
managing changes to some of their Kubernetes deployment
automation. They also uses Zuul to test and deploy itself.
</p><p>
GoDaddy has replaced a lot of slow, brittle
Jenkins jobs with highly parallelized, more realistic Zuul test
jobs. They've also been able to accelerate development on some
new projects by setting up rapid proof-of-concepts in PRs to
GitHub. Some of these go nowhere, and some of them eventually become
the deployment automation that goes into production.
</p><p>
<a href="https://superuser.openstack.org/articles/zuul-case-study-godaddy">
Read more about GoDaddy at SuperUser.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/openlab-zuul/">
OpenLab
</a>
</h3>
<p>
Zuul is currently being used as an offering within OpenLab for
projects, applications and tools that need CI gating and/or automation
around testing. With the companion tool Nodepool, they are able to keep
OpenStack virtual machines available, speeding up the process for
developers of testing code changes.
</p><p>
With the introduction of Zuul-based CI/CD instances, projects were
able to use the cloud resources for their automation in a very dynamic
way. As a result, projects can do much more excessive testing in less
time, which directly results in higher quality software, while being
faster in development and integration.
</p><p>
With the introduction of Zuul V3, OpenLab also sees a
lot of benefits from the operator's perspective by
providing a centrally hosted CI/CD instance, as
opposed to many small ones that require managing
individually.
</p><p>
<a href="https://superuser.openstack.org/articles/openlab-zuul/">
Read more about OpenLab at SuperUser.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/zuul-case-study-software-factory/">
Software Factory
</a>
</h3>
<p>
Software Factory is a distribution that integrates all the
components as CentOS packages with an installer/operator named
sfconfig to manage service configuration, backup, recovery and
upgrades. The main Zuul advantages for their users are
customizable deployments and simplicity of use. The RDO project
has been using Software Factory successfully for about three
years now. The goal is to keep the same user experience from
upstream to downstream and to allow them to share
configurations, jobs, pipelines and easily run third party CI
jobs. With the addition of GitHub support to Zuul, Software
Factory can now be used without Gerrit and people are looking
into running their own gating CI/CD for GitHub organizations
with SF to use the log processing features.
</p><p>
<a href="https://superuser.openstack.org/articles/zuul-case-study-software-factory/">
Read more about Software Factory at SuperUser.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/zuul-case-study-the-openstack-foundation/">
OpenStack
</a>
</h3>
<p>
OpenStack ended up in a situation where it wanted to keep gating
changes to OpenStack but have the ability to merge more than 24
changes a day. Running tests more quickly, or running fewer
tests were either not possible or less than ideal options.
Instead the infrastructure team set out to build a system (Zuul)
which could parallelize the serial testing of OpenStack.
Initially, Zuul was the coordinator for Jenkins and the two
systems worked together, and around April 2016, Jenkins was
replaced with an Ansible <https://www.ansible.com/>-based
execution system to improve performance and reliability. The
success of this Ansible-based system highly influenced the
decision to do the major Zuul v3 rewrite which also uses Ansible
to execute jobs.
</p><p>
<a href="https://superuser.openstack.org/articles/zuul-case-study-the-openstack-foundation/">
Read more about OpenStack at SuperUser.
</a>
</p>
<h3>
<a href="https://superuser.openstack.org/articles/zuul-case-study-packet-host/">
Packet Host
</a>
</h3>
<p>
Packet Host built a community cloud to support OpenStack with
100 concurrent VM instances each with 8 GB RAM, eight vCPUs and
80 GB storage running on 11 bare metal servers. Working with the
OpenStack Infra team has really opened my eyes up to the
capabilities of Zuul and the frameworks they’ve put together,
says John Studarus, who helped Packet Host put it together.
</p><p>
<a href="https://superuser.openstack.org/articles/zuul-case-study-packet-host/">
Read more about Packet Host at SuperUser.
</a>
</p>
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