Docker Compose¶
Docker Compose is a tool for defining and running multi-container Docker applications. Information describing the services and networks for an application are contained within a YAML file, called docker-compose.yml. 1
Elements docker-compose.yml¶
File Structure¶
version: "x.x"
services:
<service-name-1>:
build: <path-to-dockerfile>
ports:
- "<host-port>:<container-port>"
volumes:
- "<host-path>:<container-path>"
networks:
- <network-name-1>
<service-name-2>:
image: <image-name>
ports:
- "<host-port>:<container-port>"
volumes:
- "<host-path>:<container-path>"
depends_on:
- <service-name-1>
networks:
- <network-name-1>
- <network-name-2>
<database-service-name>:
image: <image-name>
ports:
- "<host-port>:<container-port>"
volumes:
- "<host-path>:<container-path>"
environment:
- POSTGRES_USER=<username>
- POSTGRES_PASSWORD=<password>
- POSTGRES_DB=<database-name>
networks:
- <network-name-2>
networks:
<network-name-1>:
<network-name-2>:
Commands¶
Build¶
This command builds/rebuilds the images for the services defined in the docker-compose.yml file.
docker-compose build
Run¶
Similar to docker run, this command runs the containers for the services defined in the docker-compose.yml file.
docker-compose run
List¶
This command lists all containers for the services defined in the docker-compose.yml file.
docker-compose ps
Up¶
This command builds and runs the containers for the services defined in the docker-compose.yml file.
docker-compose up
Down¶
This command stops the containers for the services defined in the docker-compose.yml file.
docker-compose down