ConfigMaps
ConfigMaps are a Kubernetes resource used to decouple configuration data from application code, allowing you to store non-confidential configuration data in key-value pairs. They enable you to manage configuration settings for applications running in Kubernetes pods without rebuilding container images, making deployments more flexible and maintainable. ConfigMaps can be mounted as files in pods, exposed as environment variables, or used in command-line arguments.
Developers should learn ConfigMaps when building or deploying applications on Kubernetes to separate configuration from code, which is essential for cloud-native development and microservices architectures. They are particularly useful for managing environment-specific settings (e.g., database URLs, feature flags) across different deployment stages (development, staging, production), reducing the need for hardcoded values and enabling easier updates without redeploying containers.