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From Scratch to Kubernetes: My Full-Stack DevOps Project on a Local Machine
- The article is a hands-on showcase of a DevOps project demonstrating containerization, Kubernetes orchestration, CI/CD using GitHub Actions, and observability with Prometheus, all running locally.
- The project involved creating a full-stack web application where a React frontend collects user information, passed to a Flask backend interacting with a PostgreSQL database, caching data in Redis, and routing traffic with Nginx.
- Containerization was achieved using Docker, with each component packaged into its own container and custom images stored on Docker Hub.
- Kubernetes orchestration was managed with Helm charts, MicroK8s as the distribution, and key resources like Deployments, StatefulSet, ConfigMaps, Secrets, and Ingress.
- NGINX was configured as a reverse proxy for efficient traffic routing, while Redis provided caching for faster response times.
- PostgreSQL served as the main relational database for persistent storage using Kubernetes persistent volumes.
- Observability was ensured with the Prometheus stack, Grafana for visualization, and Alertmanager for alerts on metrics breaches.
- CI/CD pipeline was set up with GitHub Actions, including linting, testing, Docker image building, and deployment triggers to the local Kubernetes cluster.
- Challenges included tweaking Nginx Ingress for service routing, managing secrets securely using Kubernetes Secrets, setting resource limits, and integrating a self-hosted GitHub runner.
- The project enhanced the author's DevOps skills, covering Dockerfile writing, Helm deployments, Kubernetes orchestration, CI/CD implementation, observability tools setup, and real-time alerts configuration.
- The experience improved the author's technical skills, understanding of system reliability, and automation appreciation.
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