Docker Compose Integration

The Docker CLI provides seamless integration with Docker Compose, allowing users to manage multi-container applications directly from the command line. This integration is achieved through the compose package, which is a part of the Docker CLI.

The compose package provides a streamlined way to interact with Compose files and commands. When you execute a Docker Compose command, such as docker compose up, the CLI delegates the command to the compose package. This package then interprets the command, reads the Compose file (usually named docker-compose.yml), and executes the necessary actions to manage the containers defined within the Compose file.

Key Features

The compose package offers a range of features for interacting with Compose files, including:

• Command Execution: Executes Docker Compose commands like up, down, build, run, and exec.
• Compose File Handling: Parses and validates Compose files (docker-compose.yml).
• Container Management: Creates, starts, stops, restarts, and removes containers defined in the Compose file.
• Service Management: Manages services, including building and deploying images.
• Network Management: Creates and configures networks for containers.
• Volume Management: Creates and mounts volumes for containers.

Usage

To use Docker Compose integration, you need to have a Compose file in your project directory. This file defines the services and configurations for your multi-container application.

Here’s a basic example of a Compose file:

version: "3.7"
          
          services:
            web:
              image: nginx:latest
              ports:
                - "80:80"
            db:
              image: mysql:latest
          

To interact with your Compose file using Docker CLI, you can use the docker compose command:

• Start the application: docker compose up
• Stop the application: docker compose down
• Build the services: docker compose build
• Run a command in a service: docker compose run web bash

Further Exploration

For detailed information on Docker Compose integration, including advanced features, troubleshooting, and API references, please refer to the following resources:

• Docker Compose Documentation
• Docker CLI Documentation
• Docker Compose Source Code
• Docker CLI Source Code