Day 37: VProfile Project on Docker

Today I containerized the VProfile Project, a Java-based multi-tier web application, using Docker. This practical step helped me solidify my understanding of containerized environments, inter-service communication, and microservice deployment workflows.

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📦 What is VProfile?

VProfile is a multi-tier application with the following services:

• Frontend (Java Spring-based WebApp)

• MySQL (Database)

• Memcached (Caching)

• RabbitMQ (Queueing)

• Tomcat (Servlet container)

• Nginx (Web proxy/load balancer)

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🛠 What I Did Today

✅ Pulled & Built Docker Images:

• Used official and custom Docker images for each component.

✅ Created a docker-compose.yml:

• Defined all services, dependencies, ports, volumes.

• Ensured proper networking and health checks.

✅ Persistent Volumes & Environment Variables:

• Added volume bindings for data persistence.

• Managed credentials with .env and Docker secrets.

✅ Tested Application Stack:

• Accessed the app in browser via localhost:8080

• Verified communication between containers using docker exec & logs

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📚 What I Learned

• Multi-container orchestration using Docker Compose

• Application-level dependencies and linking services

• Internal DNS via Docker networks (service_name works like a hostname)

• Simplifying DevOps workflows using Docker

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📌 Next Steps:

Introduction to Bash scripting