Building Workday's Next Generation Private Cloud with Zuul
summary
Workday runs 87 OpenStack clusters totaling about 2 million cores, 12 PB RAM and ~60,000 concurrent VMs with ~240,000 VM recreates weekly, and builds a next‑gen private cloud (WPC4) using Zuul + Gerrit as CI, finishing a working OpenStack pipeline in ~2 months. Migration replaces Jenkins/Chef with branch‑based gating, job variants and Ansible playbooks, enables multiple stable releases, but forces private mirrors, custom Ubuntu images, workarounds for nodepool and secrets, and avoids using Zuul for CD.
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chapters (12)
- 0:00Introduction
- 0:15Context
- 0:50Openstack
- 3:18Where are we now
- 5:43Why Zuul
- 8:05Pain Points
- 9:14Release Pipeline
- 10:05Zuul
- 11:35Zuul caveats
- 13:45Benefits
- 14:35Extra thoughts
- 15:40Zuul deployment
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