Completed All Two-Tier Application Deployment Series.

From Errors to Engineer: How I Dockerized, K8s’d, and Helm’ed My Way to Victory

This wasn’t just deploying a Flask + MySQL app—it was a full-on DevOps rollercoaster involving Docker, Kubernetes, and Helm. Faced countless errors, debugged my way out, and learned a LOT in the process. Massive thanks to TrainWithShubham and Shubham Londhe Sir—your way of teaching makes even complex topics feel beginner-friendly. Shout-out to Madhup Pandey mate—your GitHub fork was a savior when the main branch had issues. Appreciate the clean fixes! I’ve documented every episode step-by-step with commands and screenshots to help others avoid the hurdles I hit.

Quick Project Breakdown: EP-1: Architecture Overview → Flask (frontend + backend) + MySQL (DB) → Dockerized → Pushed to Docker Hub → Pulled via Kubernetes → Deployed using Helm on AWS. EP-2: Dockerization → Built and networked containers for Flask & MySQL → Resolved errors, added Docker Compose, pushed image to Docker Hub. EP-3: Kubernetes Setup → Set up master & worker nodes using kubeadm → Installed CRI-O, applied Calico, used crictl commands instead of Docker. EP-4: K8s Deployment → Created pods, deployments, services → Exposed app via NodePort → Connected to MySQL using ClusterIP & persistent volume. EP-5: Helm Packaging → Created charts for MySQL & Flask → Injected env vars via values.yaml → Simplified full deployment using helm install. Final Result: Flask app connected to MySQL, deployed on Kubernetes, scalable, and accessible via NodePort. Query data using SELECT * FROM messages; for detailed project follow my linkedin link- https://www.linkedin.com/posts/devops-methodology_2-tier-application-deployment-project-series-activity-7339584448717275136-KdOR?utm_source=share&utm_medium=member_desktop&rcm=ACoAAE0aWosBwvnsFU3QDf3zF_WnWYAe3ZS1mlk

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