To solve the hardcoding issue, applications began reading text files stored on the same local disk as the application. While highly effective for standalone software, this approach becomes messy when managing hundreds of distributed cloud servers. 3. Environment Variables
These allow you to update config without restarting services and also serve as a single source of truth.
When you move beyond a handful of services, you need specialised configuration management tools. config
config/ default.yaml development.yaml production.yaml
Choosing the right format for your config is a strategic decision. Here is a breakdown of the industry standards. To solve the hardcoding issue, applications began reading
To give you the most useful answer, I’ll provide a that applies across most technical systems. If you meant something specific (e.g., Kubernetes configs, Python/Django settings, Nginx, VS Code, or a particular tool), let me know and I’ll refine it.
Enabling or disabling specific application modules dynamically. Environment Variables These allow you to update config
Manage config inside Kubernetes clusters. How it works: ConfigMaps hold non‑sensitive key‑value pairs; Secrets hold base64‑encoded sensitive data. Both can be mounted as files or injected as environment variables into pods.
By changing this single YAML file, you change the image version, the port mapping, and the database password without touching the Nginx or PostgreSQL source code.
Print a summary of loaded config (excluding secrets) to help debugging. Mask sensitive fields like passwords with *** . Example output: