Reproducibility means recreating the same application environment from recorded build instructions and inputs. Containers support this by storing environment-creation steps in a container build file. section 1.1.1
Reproducibility improves deployment practice in several ways:
- Use the same container across development and production instead of rebuilding each environment manually. section 1.1.1
- Prefer declarative Kubernetes configuration when reproducing staging or production, because the same configuration can be applied again with needed changes. section 3.3
- Treat configuration like application source code through configuration as code or GitOps rather than relying only on remembered commands. section 3.3
From build instructions to repeatable deployment
A pseudocode Dockerfile records steps such as using Ubuntu, configuring a TLS certificate, and copying the application. Kubernetes imperative commands can create and expose a timeserver, but reproducing that setup elsewhere requires remembering or scripting those commands. A declarative configuration captures the desired setup and can be applied again. section 3.3
