Docker Compose

Docker Compose is a tool for defining and running multi-container applications. It uses a YAML file (docker-compose.yml) to configure your application’s services, networks, and volumes.

Key Features

• Single Command Orchestration: With a single command (docker compose up), you can create and start all the services defined in your configuration.
• Service Isolation: Each service runs in its own container but can communicate with others over a common network.
• Environment Consistency: Ensures that the entire stack (web, DB, cache) is set up identically across different environments (dev, staging, etc.).
• Project Scoping: Compose uses a project name (usually the directory name) to isolate environments on the same host.

Core Components of docker-compose.yml

1. services: Defines the individual containers (e.g., web, db).
2. networks: Defines the virtual networks the containers connect to.
3. volumes: Defines the persistent storage shared or used by services.
4. build: Instructions for building an image from a Dockerfile.
5. image: Specifies a pre-built image to use.