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  Configuration & Secrets: ConfigMaps, Secrets, and Environment Variables 📅 Published: May 2026 ⏱️ Estimated Reading Time: 18 minutes 🏷️ Tags: Kubernetes, ConfigMaps, Secrets, Environment Variables, Configuration Management Introduction: The Configuration Problem Applications need configuration. Database connection strings, feature flags, API endpoints, environment names—these values change between development, staging, and production. They should not be hardcoded into container images. Hardcoding configuration leads to: Different images for each environment Security risks from embedded secrets Redeploys for simple config changes Configuration drift between environments Kubernetes solves this with ConfigMaps and Secrets. These objects separate configuration from container images, allowing you to change settings without rebuilding or redeploying. This guide covers how to use ConfigMaps for non-sensitive configuration, Secrets for sensitive data, and environment variables for r...