What is 12 factors approach for micro service

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Accepted Answer

The 12 factors approach is a methodology for building modern, scalable, and maintainable microservices.

Codebase: One codebase tracked in revision control, many deploys
Dependencies: Explicitly declare and isolate dependencies
Config: Store config in the environment
Backing services: Treat backing services as attached resources
Build, release, run: Strictly separate build and run stages
Processes: Execute the app as one or more stateless processes
Port binding: Export services via port binding
Concurrency: Scale out via the process model
Disposability: Maximize robustness with fast startup and graceful shutdown
Dev/prod parity: Keep development, staging, and production as similar as possible
Logs: Treat logs as event streams
Admin processes: Run admin/management tasks as one-off processes

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