Lab3 (Spring Boot/K8S): Mastering ConfigMaps in Kubernetes

Hello Devs! Welcome back to our series of stories with Kubernetes and Spring ecosystem. In this story, we’ll learn how to use ConfigMaps in Kubernetes.

· Overview
∘ What are Kubernetes ConfigMaps?
∘ Where are ConfigMaps stored in Kubernetes?
∘ ConfigMap object
· How to use a ConfigMap to configure a container inside a Pod
∘ 1. Environment variables for a container
∘ 2. Injecting a ConfigMap entry as a command-line argument
∘ 3. Mounting ConfigMaps into Pods as volumes
∘ 4. Using Immutable ConfigMaps
· Conclusion
· References

This series of stories shows how to use Kubernetes in the Spring ecosystem. We work with a Spring boot API and Minikube to have a lightweight and fast development environment similar to production.

• Lab1 (Spring Boot/K8S): Deploy Spring Boot application on Kubernetes
• Lab2 (Spring Boot/K8S): Kubernetes health probes with Spring Boot
• 👉 Lab3 (Spring Boot/K8S): Mastering ConfigMaps in Kubernetes