Learn DOCKER-COMPOSE with Real Code Examples

Declarative `docker-compose.yml` defines services, networks, and volumes

Docker Compose CLI interprets the YAML and starts containers

Supports service dependencies via `depends_on`

Uses Docker networks for container communication

Volumes provide persistent storage between container restarts

Compose file defines services and their configuration

Docker Compose CLI interprets and runs containers

Networks and volumes created automatically

Services started in defined order respecting dependencies

One command controls multiple containers

Microservices architecture

Multi-container orchestration

Declarative environment definition

Single-host or Swarm-based scaling

CI/CD integration with Compose files

LAMP stack with PHP, MySQL, and Nginx

Node.js backend with Redis cache and PostgreSQL

Microservices local development environment

CI/CD pipeline testing environment

Multi-container data processing application

Declarative service configuration

Simplify multi-container management

Portable and reproducible environments

Integration with Docker ecosystem

Support both local development and Swarm deployments

Use `docker-compose up --scale` for multiple instances

Leverage Swarm mode for multi-node scaling

Split services into smaller, independent containers

Optimize container images for startup speed

Monitor CPU, memory, and network usage

Convert single Docker CLI commands to Compose file

Define multiple containers and their dependencies

Move environment variables to `.env` file

Integrate volumes and networks in Compose

Test full application with `docker-compose up`