18. Kubernetes Env Variables | Static & ConfigMap Demo
Learn how to manage Kubernetes environment variables effectively using both static values and ConfigMaps with simple, beginner-friendly demos. This video walks you through how to pass configuration data into your containers using Kubernetes best practices.
✔️ Set static env variables using the env field inside a Pod
✔️ Use a ConfigMap to inject env vars into Deployments with envFrom
✔️ Easily test env variables inside containers using kubectl exec
✔️ Perfect for DevOps engineers, sysadmins, and Kubernetes beginners
✔️ Understand the difference between env vs envFrom for scalable config
🔥 Whether you're working on microservices, CI/CD pipelines, or production apps — mastering env vars is essential for clean and secure configuration in Kubernetes.
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📂 COMMANDS USED IN THIS VIDEO
kubectl apply -f static-env-pod.yaml
kubectl exec -it static-env-demo -- sh
printenv | grep APP_
kubectl apply -f app-configmap.yaml
kubectl apply -f config-deployment.yaml
kubectl get pods -l app=configmap-app
printenv | grep LOG_
📚 Chapters
0:00 🚀 Intro to Env Variables
0:29 🤔 What Are Env Variables?
0:55 🛠️ Ways to Define Env
1:23 📝 Demo Examples Overview
1:50 💻 Static Env Variable Demo
6:00 🗺️ ConfigMap Env Variables
16:06 💡 Env Variable Summary
16:27 👋 Conclusion & Next Steps
🎓 Continue Learning with These Playlists :
🐧 Linux for Beginners (Start from scratch):
👉 [Watch the Playlist]( • Linux for Beginners 🐧 )
💻 Linux Command Line Tutorials (Terminal-focused skills):
👉 [Explore Commands]( • Linux Command )
🚀 Kubernetes Series for Admins and Devs :
👉 [Start Learning Kubernetes]( • Kubernetes )
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