docker-compose volumes_from equivalent with version 3

Question

I'm trying to create an Nginx/PHP FPM setup with docker compose and am having issues with the version 3 volumes syntax/changes.

My Dockerfile:

FROM php:7-fpm VOLUME /var/www/html 

My docker-compose.yml:

version: "3" services:   php:     build: .     volumes:       - ./html:/var/www/html   web:     image: nginx     links:       - php     ports:       - "8888:80"     volumes:       - php:/var/www/html       - ./default.conf:/etc/nginx/conf.d/default.conf volumes:   php: 

When I add an index.php file into ./html, I can view that by going to http://localhost:8888, but any static files (like CSS) return a 404 because Nginx cannot find those in its container (/var/www/html is empty on the nginx container). With version 3 docker compose files do not have volumes_from anymore, which is basically what I'm trying to replicate.

How can I get this to work with version 3?

Answer 1

For using "Named volumes" for sharing files between containers you need to define

1) volumes: section on the top level of yml file and define volume name

volumes:   php: 

2) define volume section on first container like you did (Where share will mount)

web:     volumes:       - php:/var/www/html #<container_name>:<mount_point> 

3) define volume section on second container (Share will mount from)

php:   volumes:     - php:/var/www/html 

4) (optionally) If you need to store volume data on the host machine you can use local-persist docker plugin. You can specify docker volume driver and path where you data will be stored.

volumes:   php:     driver: local-persist     driver_opts:       mountpoint: /path/on/host/machine/ 

In your case you forgot define volume name for php container. Just replace

  php:     build: .     volumes:       - ./html:/var/www/html 

to

  php:     build: .     volumes:       - php:/var/www/html 

and use Local Persist Docker Plugin