{"id":21379,"date":"2024-12-08T14:04:09","date_gmt":"2024-12-08T20:04:09","guid":{"rendered":"http:\/\/www.designandexecute.com\/designs\/?p=21379"},"modified":"2024-12-08T14:04:10","modified_gmt":"2024-12-08T20:04:10","slug":"12-factor-app-principles","status":"publish","type":"post","link":"https:\/\/www.designandexecute.com\/designs\/12-factor-app-principles\/","title":{"rendered":"12-Factor App principles"},"content":{"rendered":"\n

The 12-Factor App<\/strong> principles are best practices for building scalable, maintainable, and robust software-as-a-service (SaaS) applications. Initially defined by developers at Heroku, these principles guide how to design applications that can thrive in modern cloud environments. Here’s a breakdown of the 12 factors:<\/p>\n\n\n\n

\n\n\n\n

1. Codebase<\/strong><\/h3>\n\n\n\n

One codebase tracked in version control, many deploys<\/strong><\/p>\n\n\n\n

  • Maintain a single source of truth in a version control system like Git.<\/li>
  • Deploy the same codebase across multiple environments (e.g., staging, production).<\/li><\/ul>\n\n\n\n
    \n\n\n\n

    2. Dependencies<\/strong><\/h3>\n\n\n\n

    Explicitly declare and isolate dependencies<\/strong><\/p>\n\n\n\n

    • Use a dependency management tool (e.g., requirements.txt<\/code> for Python or package.json<\/code> for Node.js).<\/li>
    • Avoid relying on system-level packages to ensure consistent environments.<\/li><\/ul>\n\n\n\n
      \n\n\n\n

      3. Config<\/strong><\/h3>\n\n\n\n

      Store config in the environment<\/strong><\/p>\n\n\n\n

      • Configuration should be stored in environment variables (e.g., API keys, database URLs).<\/li>
      • Separate code from configuration to make your application more portable.<\/li><\/ul>\n\n\n\n
        \n\n\n\n

        4. Backing Services<\/strong><\/h3>\n\n\n\n

        Treat backing services as attached resources.<\/strong><\/p>\n\n\n\n

        • External services like databases, message queues, or caches should be treated as interchangeable resources.<\/li>
        • Use environment variables to define service locations, making it easy to swap providers.<\/li><\/ul>\n\n\n\n
          \n\n\n\n

          5. Build, Release, Run<\/strong><\/h3>\n\n\n\n

          Strictly separate build and run stages<\/strong><\/p>\n\n\n\n

          • Build stage<\/strong>: Compile code and assets.<\/li>
          • Release stage<\/strong>: Combine build artifacts with config to create a deployable release.<\/li>
          • Run stage<\/strong>: Execute the app in the runtime environment.<\/li><\/ul>\n\n\n\n
            \n\n\n\n

            6. Processes<\/strong><\/h3>\n\n\n\n

            Execute the app as one or more stateless processes<\/strong><\/p>\n\n\n\n

            • Application processes should be stateless and share nothing (e.g., session data should be stored in a database or cache).<\/li>
            • This allows scaling by adding more processes.<\/li><\/ul>\n\n\n\n
              \n\n\n\n

              7. Port Binding<\/strong><\/h3>\n\n\n\n

              Export services via port binding<\/strong><\/p>\n\n\n\n

              • The application should self-contain its web server, binding to a port (e.g., localhost:5000<\/code>) and exposing services over HTTP.<\/li><\/ul>\n\n\n\n
                \n\n\n\n

                8. Concurrency<\/strong><\/h3>\n\n\n\n

                Scale out via the process model.<\/strong><\/p>\n\n\n\n

                • Applications should be designed to handle workload by spawning multiple processes.<\/li>
                • Use workload-specific processes (e.g., web workers, background workers).<\/li><\/ul>\n\n\n\n
                  \n\n\n\n

                  9. Disposability<\/strong><\/h3>\n\n\n\n

                  Maximize robustness with fast startup and graceful shutdown<\/strong><\/p>\n\n\n\n

                  • Processes should start and stop quickly to support scaling and fault tolerance.<\/li>
                  • Ensure the app responds gracefully to termination signals.<\/li><\/ul>\n\n\n\n
                    \n\n\n\n

                    10. Dev\/Prod Parity<\/strong><\/h3>\n\n\n\n

                    Keep development, staging, and production as similar as possible<\/strong><\/p>\n\n\n\n

                    • Reduce gaps between environments to minimize deployment issues.<\/li>
                    • Sync dependencies, environments, and tools across all stages.<\/li><\/ul>\n\n\n\n
                      \n\n\n\n

                      11. Logs<\/strong><\/h3>\n\n\n\n

                      Treat logs as event streams<\/strong><\/p>\n\n\n\n

                      • Applications should not manage log files directly. Instead, output logs to stdout<\/code> or stderr<\/code>.<\/li>
                      • Use a log aggregation service for analysis and monitoring.<\/li><\/ul>\n\n\n\n
                        \n\n\n\n

                        12. Admin Processes<\/strong><\/h3>\n\n\n\n

                        Run admin\/management tasks as one-off processes.<\/strong><\/p>\n\n\n\n

                        • Tasks like database migrations, analytics scripts, or maintenance should be performed as separate processes in the same environment as the app.<\/li><\/ul>\n\n\n\n
                          \n\n\n\n

                          Adhering to these principles helps ensure that applications are portable, resilient, and easily managed<\/strong>, particularly in modern distributed or cloud-native architectures.<\/p>\n","protected":false},"excerpt":{"rendered":"

                          The 12-Factor App principles are best practices for building scalable, maintainable, and robust software-as-a-service (SaaS) applications. Initially defined by developers at Heroku, these principles guide how to design applications that can thrive in modern cloud environments. Here’s a breakdown of the 12 factors: 1. Codebase One codebase tracked in version control, many deploys Maintain a […]<\/p>\n","protected":false},"author":2,"featured_media":21381,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-21379","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq"],"jetpack_featured_media_url":"https:\/\/www.designandexecute.com\/designs\/wp-content\/uploads\/2024\/12\/12-Factor-App-Principles-2-227930784.jpg","_links":{"self":[{"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/posts\/21379","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/comments?post=21379"}],"version-history":[{"count":1,"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/posts\/21379\/revisions"}],"predecessor-version":[{"id":21380,"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/posts\/21379\/revisions\/21380"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/media\/21381"}],"wp:attachment":[{"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/media?parent=21379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/categories?post=21379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.designandexecute.com\/designs\/wp-json\/wp\/v2\/tags?post=21379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}