How to replace volumes_from in docker-composer v3

Question

I want to know the equivalent of the configuration below to suit version 3 of docker-composer.yml! volumes_from is no longer valid so am I supposed to skip the data volume and replace it with top level volumes ?

version: '2' services:    php:     build: ./docker-files/php-fpm/.     volumes_from:       - data     working_dir: /code     links:       - mysql    nginx:     image: nginx:latest     ports:       - "80:80"     volumes:       - ./nginx/default.conf:/etc/nginx/conf.d/default.conf     volumes_from:       - data     links:       - php    data:     image: tianon/true     volumes:       - .:/code 

Answer 1

By default named volumes allow you to share data between containers. But it is some troubles with storing data in the same place on the host machine after restarting containers. But we can use local-persist docker plugin for fix it.

For migration to version 3 you need

1) install local-persist docker plugin (if you want to store volumes data to the particular place on the host machine)

2) modify docker-compose.yml

version: '3' services:    php:     build: ./docker-files/php-fpm/.     volumes:       - data:/code     working_dir: /code     links:       - mysql    nginx:     image: nginx:latest     ports:       - "80:80"     volumes:       - ./nginx/default.conf:/etc/nginx/conf.d/default.conf     volumes:       - data:/code     links:       - php    data:     image: tianon/true     volumes:       - data:/code  # If you use local persist plugin volumes:   data:     driver: local-persist     driver_opts:       mountpoint: /path/on/host/machine/  # Or If you dont want using local persist plugin volumes:   data: 

Also you can store volumes data to the host machine with this volumes section:

volumes:   data:     external: true #< it means store my data to the host machine 

But you can't specify path for this volume on host machine