The 12.1 factor approach prefers locality over fully integrated environments. Doing so promotes fast and independent iterations on discrete services using automated tests to verify correctness. End-to-End issues that may have been identified with a fully integrated environment with dev/prod parity should be pushed downstream in the deployment pipeline in accordance with test pyramid principles. If a regression is identified, then it may quickly addressed by adding tests to the relevant service’s test suite.Topics Mentioned in the ShowThe 5 Ideals The Unicorn ProjectPractical Test PyramidHexagonal ArchitectureTeam TopologiesMy Talk at WrocLove.rb 2014 on Software Architecture, Object, Roles, and BoundariesBounded Contexts & Domain Driven DesignResourcesThe 12 Factor AppJay Kutner on the 12 Factor App via SE RadioMy Review & Analysis on The DevOps HandbookMy Review & Analysis on AccelerateSoftware Development in 3 Principles & 4 MetricsBooksThe DevOps Handbook by Gene Kim, Jez Humble, John Willis, Patrick DeboisAccelerate by Nicole Forsgren, Jez Humble, Gene Kim

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