docker-compose

Basic Syntax

Key Commands and Options

1. up: Create and start containers.

   docker-compose up [OPTIONS] [SERVICE...]

   Options:

   • -d, --detach: Run containers in the background.

     docker-compose up -d

   • --build: Build images before starting containers.

     docker-compose up --build

2. down: Stop and remove containers, networks, images, and volumes.

   docker-compose down [OPTIONS]

   Options:

   • -v, --volumes: Remove named volumes declared in the volumes section of the Compose file and anonymous volumes attached to containers.

     docker-compose down -v

3. build: Build or rebuild services.

   docker-compose build [OPTIONS] [SERVICE...]

   Options:

   • --no-cache: Do not use cache when building the image.

     docker-compose build --no-cache

4. ps: List containers.

   docker-compose ps [OPTIONS] [SERVICE...]

5. logs: View output from containers.

   docker-compose logs [OPTIONS] [SERVICE...]

   Options:

   • -f, --follow: Follow log output.

     docker-compose logs -f

6. exec: Execute a command in a running container.

   docker-compose exec [OPTIONS] SERVICE COMMAND [ARGS...]

   Options:

   • -d, --detach: Run command in the background.

     docker-compose exec -d web bash

Examples

1. Starting Services

   docker-compose up

   This command starts all the services defined in the docker-compose.yml file.

2. Starting Services in Detached Mode

   docker-compose up -d

   This command starts all the services in the background.

3. Stopping and Removing Services

   docker-compose down

   This command stops and removes all the services, networks, and volumes defined in the docker-compose.yml file.

4. Building Services

   docker-compose build

   This command builds the images for the services defined in the docker-compose.yml file.

5. Listing Running Containers

   docker-compose ps

   This command lists all the running containers for the services defined in the docker-compose.yml file.

6. Viewing Logs

   docker-compose logs

   This command shows the logs for all the services defined in the docker-compose.yml file.

7. Executing a Command in a Running Container

   docker-compose exec web bash

   This command opens a bash shell in the running container for the web service.

Conclusion

The docker-compose command is essential for managing multi-container Docker applications. Understanding its commands and options allows you to effectively define, start, stop, and manage your Docker services.