Question

I created a dockerFile and docker-compose.yml:

Dockerfile

FROM php:7
 RUN apt-get update -y && apt-get install -y libmcrypt-dev openssl
 RUN docker-php-ext-install pdo mcrypt mbstring
 RUN curl -sS  https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
 WORKDIR /app
 COPY . /app
 
 CMD php artisan serve --host=0.0.0.0 --port=8000
 EXPOSE 8000

docker-compose.yml

version: '3'
 services:
 web:
 build:
 context: .
 dockerfile: ./Dockerfile
 ports:
 - 3021:8000
 volumes:
 - ./laravel-app:/app

When I executedocker-compose up –force-recreate -dAfter that, laravel app will127.0.0.1:3021On the correct implementation.

I’ve seen many docker-composer articles on the Internet that encourage the minimization of container, so I want to ask.Is there any way to rewrite this docker-compose.yml using php and composer’s official image?

The following are my attempts:

version: '3'
 
 services:
 php:
 image: php:7-fpm
 ports:
 - "3021:8000"
 volumes:
 - ./laravel-app:/app
 composer:
 image: composer:latest
 volumes:
 - ./laravel-app:/app
 working_dir: /app
 command: ["install","php artisan serve --host=0.0.0.0"]
 depends_on:
 - php

After completing this docker-compose.yml, I will execute itdocker-compose up –force-recreate -d, however127.0.0.1:3021However, no information was captured on the website.

I’ll follow updocker-compose psAnddocker-compose log, found that composer’s container was not started with the following error information

Invalid argument php artisan serve --host=0.0.0.0. Use "composer require php artisan serve --host=0.0.0.0" instead to add packages to your composer.json.

May I know how to amend it?

Answer 1

When Dockerfile was built, the basic image was the alpine image version, and then the composer construction was separated into a single stage (multi-stage construction).

What I mean is that it is meaningless to simply tear down the container to a minimum. On the contrary, it may cause bugs or bottlenecks when network data frequently enter and leave the container. Moreover, the way of building+docker-compose.yml to pull up services through Dockerfile was quite good before, and it was not necessary to write all of them into dockercomposition.yml. In addition, some things, such as mbstring, exist in the basic image itself, so there is no need to install them again. It is recommended that you goDocker StoreSearch the underlying image (point Tag to see the build script), and then select the appropriate Tag.