Docker Compose Generator

How to Use Docker Compose

Docker Compose simplifies running multi-container applications. Instead of starting each container manually with long docker run commands, you define all your services in a single YAML file. Running docker compose up starts everything together with the correct configuration, networking, and volume mounts. This is particularly valuable for development environments where you need a database, cache, and application server running simultaneously.

Select the services your project needs from the checkboxes above. Each service comes preconfigured with a recent stable image, standard ports, named volumes for data persistence, and health checks where applicable. The generator also handles service dependencies, so your Rails application will wait for PostgreSQL and Redis to be ready before starting.

Available Services

PostgreSQL and MySQL provide relational database options with persistent storage volumes and health checks. Redis offers in-memory caching and background job processing. MongoDB supports document-based data storage. Nginx serves as a reverse proxy and web server. Node.js and Rails provide application runtime environments. Elasticsearch enables full-text search. RabbitMQ handles message queuing. MailHog captures outbound emails for testing without sending real messages. MinIO provides S3-compatible object storage.

Customizing the Generated File

The generated file is a starting point. Always change default passwords before sharing or deploying. Pin image tags to specific versions for reproducible builds. Add custom networks to isolate services. Include environment-specific configuration using .env files referenced with env_file. For production, remove development-only services like MailHog and add resource limits.

Common Commands

Use docker compose up -d to start services in the background. docker compose down stops and removes containers but preserves volumes. docker compose logs -f streams logs from all services. docker compose ps shows the status of all containers. docker compose exec service_name command runs a command inside a running container.

Frequently Asked Questions

What is Docker Compose?

A tool for defining and running multi-container applications using a YAML file. One command starts all services together.

What services are supported?

PostgreSQL, MySQL, Redis, MongoDB, Nginx, Node.js, Rails, Elasticsearch, RabbitMQ, Memcached, MailHog, and MinIO.

How do volumes work?

Named volumes persist data between container restarts. Bind mounts map local directories for live code reloading.

What are health checks?

Commands that verify a service is ready. Other services can wait for dependencies to be healthy before starting.

How do I customize the output?

Change passwords, pin image versions, add networks, and include .env files. Remove dev-only services for production.