Adding PHP Extensions using Docker Compose

Question

I'm trying to setup a local development environment in docker that includes nginx and php. I started with this tutorial and have a functioning server. My project requires that a couple PHP extensions be installed, but I'm having difficulty figuring out how to adapt this setup to include them.

The documentation for the image says to put it in a dockerfile, which I have done. However, that gives me an error of:

ERROR: The Compose file is invalid because: Service php has both an image and alternate Dockerfile. A service can either be built to image or use an existing image, not both.

My docker-compose.yml:

web:
  image: nginx:latest
  ports:
    - "80:80"
  volumes:
  - ./code:/code
  - ./site.conf:/etc/nginx/conf.d/site.conf
  links:
    - php
php:
  dockerfile: extensions
  image: php:7-fpm
  volumes:
    - ./code:/code

My extensions file

RUN docker-php-ext-install zip
RUN docker-php-ext-install gd
RUN docker-php-ext-enable zip
RUN docker-php-ext-enable gd

Clearly I'm going about this wrong. Is there a way to install the extensions into this image, or do I need to create my own? I'm using Docker for Windows.

you have to build the image yourself, if you use image: in compose file it never read the Dockerfile — Mazel Tov
– Mazel Tov, Commented Apr 16, 2018 at 21:45

nur zazin · Accepted Answer · 2019-10-04 19:21:12Z

13

this is my code. its already running on my server.

web:
  image: nginx:latest
  ports:
    - "80:80"
  volumes:
  - ./code:/code
  - ./site.conf:/etc/nginx/conf.d/site.conf
  links:
    - php
php:
  #remove this
  #dockerfile: extensions
  #image: php:7-fpm
  #change with build ...
  build: './docker/php'
  volumes:
    - ./code:/code

Then, add Dockerfile file to the docker/php folder:

FROM php:7-fpm

RUN apt-get update && apt-get install -y \
        libicu-dev \
    && docker-php-ext-install \
        intl \
    && docker-php-ext-enable \
        intl

Now you can run Dockerfile inside docker-compose.

answered Oct 4, 2019 at 19:21

nur zazin

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Comments

JemoeE · Accepted Answer · 2018-04-17 10:33:32Z

8

In your extensions file, add this to the top: FROM php:7-fpm

and remove the image: php:7-fpm from your docker-compose file

answered Apr 17, 2018 at 10:33

JemoeE

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