No More Big Bang Operation – Keep Deploying Upstream OpenStack...
Talkat Open Source Summit Japan + AI_dev: Open Source GenAI & ML Summit + Automotive Linux Summit 2025 · 2025-12-08..12-10·
summary
Claims a Continuous Upstream Deployment Policy lets an OpenStack-based private cloud migrate across four major releases without a greenfield rebuild by running three CI tracks (green/red/purple) and an automated rebasing that detects code conflicts, API/schema and output changes. The green CI applies and tests custom patches against moving upstream commits, reduces required operators from five to one engineer, shortens the operation window from ~four months to about one week, and reports no unexpected failures.
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chapters (19)
- 0:00Introduction
- 1:55Flavor private cloud
- 3:13Upgrades as big bang
- 5:07OpenStack upgrade pain
- 7:19Company upgrade challenges
- 9:28Private cloud issues
- 11:55Big bang to continuous
- 13:45Cloud management shift
- 15:20CI systems: Green, Red, Purple
- 17:11Green CI detection
- 20:00Feature-centric patching
- 21:50Four version migrations
- 23:15Upgrade time/resources
- 25:25Upgrade frequency
- 27:11Lessons learned
- 28:14Upgrade mindset
- 29:45Versioning culture
- 30:06Closing
- 31:15Q&A
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