Using Compose file in Docker

You can use the docker-compose.yml file for defining volumes and services.

About this task

The default path for a Compose file is ./docker-compose.yml. Below is an example of launching the postgres container.

1. Open the docker-compose.yml.
2. Launch container postgres with 10 GB Flocker volume mounted in the /data path of the container by setting the required parameters in the file:

                      
   version: "2"
    
   volumes:
      volumename1:
         driver: "flocker"
         driver_opts:
           size: "10GiB"
           profile: "gold"
    
   services:
      postgres :
        image: postgres 
        environment:
           - "PGDATA=/var/lib/postgresql/data"
        volumes:
           - 'postgres_vol5:/var/lib/postgresql/data'

3. Run the docker-compose up command. The command reads the docker-compose.yml file in the current directory and launches the container with the new volume.