Zuul v2 Current Status

• In production for OpenStack
• Also in use by ~50 3rd-party CI systems for OpenStack
• Also in use by Wikimedia, HPE and others
• Receives events from and reports results to Gerrit
• Multiple git repository relationship aware
• Nodepool attaches single-use cloud slaves to Jenkins Master Pool
• Triggers jobs on Jenkins Pool for executing job content
Jenkins serves no role except remote execution

What is Zuul v3

• Replace Jenkins with Ansible
• Change zuul/nodepool interaction to zuul requesting N resources from nodepool
  • Zuul requests N resources from nodepool
  • Zuul creates ansible inventory, passes to job executors
  • Job executor runs job content on build resources using ansible + inventory
• Add github PR integration in addition to gerrit
• Add multi-tenancy for job configs and secrets
• Add in-repo job configs - self testing CI config
• Add reusable build resources (such as bare metal)
• Add container build resources (docker, kubernetes)

Zuul v3 Current Status

• Zuul v3 Spec is approved - OpenStack CI will move to it
• First phase of all the hard bits is done in the v3 branch
• Nodepool v2 branching now as nodepool/shade integration has landed
• Estimate 2 months of effort to be at initial feature complete for OpenStack

Zuul v3 Future need

• Supporting expanded userbases outside of OpenStack adds importance to original wishlist features
  • Github Integration
  • Container Integration
  • Non-OpenStack Cloud (AWS, GCE, Azure)
• Github support for the v2 branch already written, not merged pending v3
• Initial design for container integration done
  • Need a deeper detailed spec
• Non-OpenStack Cloud simple to implement in nodepool v2

Zuul v2.5

• Waiting for Zuul v3 got costly
• Zuul "2.5" is a release-valve to solve immedate problems
  • Jenkins replaced by Ansible
  • Ansible workers directly read Jenkins Job Builder templates
  • Accelerating review of github PR patches with view of landing in weeks