12: ConfigMaps and Secrets
Most business applications have two components:
- The application
- The configuration
Simple examples include web servers such as NGINX or httpd (Apache). Neither is much use without a configuration. However, as soon as you add a configuration, they become very useful.
In the past, we packaged the application and the configuration into a single easy-to-deploy unit. We brought this pattern with us as we moved into the early days of cloud-native microservices. However, it’s an anti-pattern, and modern applications should be decoupled from their configurations. Doing this brings the following benefits:
- Reuse
- Simpler development and testing
- Simpler and less-disruptive changes
We’ll explain all these and more as we go through ...
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