Installing Symfony using Docker: a step-by-step guide

Installing Symfony using Docker: A Step-by-Step Guide

Symfony is a popular PHP framework that allows developers to quickly build high-quality web applications. Docker is a containerization platform that can easily deploy and manage applications. Using Symfony and Docker together can simplify environment configuration and improve development efficiency. This article will guide you step by step to install Symfony through Docker and provide specific code examples.

1. Installing Docker and Docker Compose
   To install Symfony using Docker, you first need to install Docker and Docker Compose on your computer. You can download and install them from the official website according to your operating system. Once the installation is complete, verify that the installation was successful by running the following command:

docker -v
docker-compose -v

2. Create Symfony Project
   Before installing Symfony, you need to create a new Symfony project. Switch to the project's working directory and create a new project using the following command:

docker run --rm -v $(pwd):/app composer create-project symfony/website-skeleton myproject

This will create a Symfony project named "myproject" in the current directory.

3. Configure Docker Compose file
   Create a file named docker-compose.yml in the root directory of the project and add the following content:

version: '3'
services:
  php:
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - .:/app
    ports:
      - 8000:8000
    depends_on:
      - db
  db:
    image: mysql:5.7
    environment:
      - MYSQL_ROOT_PASSWORD=root
      - MYSQL_DATABASE=myproject
      - MYSQL_USER=user
      - MYSQL_PASSWORD=pass

This The Docker Compose file configures two services, php and db. The php service will build a container based on the Dockerfile in the current project directory and map the project directory to the container's /app directory. It will also expose port 8000 for easy access to Symfony applications. The db service will use the MySQL 5.7 image and configure some environment variables.

4. Create Dockerfile
   Create a file named Dockerfile in the root directory of the project and add the following content:

FROM php:7.4-fpm

RUN apt-get update && apt-get install -y 
    git 
    unzip 
    libicu-dev 
    && docker-php-ext-install 
    intl 
    pdo_mysql 
    && pecl install apcu 
    && docker-php-ext-enable --ini-name 20-apcu.ini apcu

WORKDIR /app

COPY composer.json composer.lock ./

RUN composer install --prefer-dist --no-scripts --no-progress --no-suggest 
    && composer clear-cache

COPY . ./

CMD php -S 0.0.0.0:8000 -t public

This Dockerfile will be based on php:7.4 -fpm image builds a container. It installs some common extensions and dependencies and copies the Symfony application’s directory to the container’s /app directory. Finally, it starts the Symfony built-in web server using the php command.

5. Build and start the container
   Open a terminal in the root directory of the project and execute the following commands to build and start the container:

docker-compose up -d --build

This will use Docker Compose The configuration in the file builds and starts the containers for the php and db services. You can verify that the Symfony application is running successfully by visiting http://localhost:8000.

At this point, you have successfully installed Symfony using Docker. Now you can start developing and testing your Symfony application. Whenever you need to stop or start a Symfony application, just run the following command:

docker-compose stop   # 停止容器
docker-compose start  # 启动容器

Summary:
Installing Symfony using Docker simplifies environment configuration and provides consistency and portability. With the help of Docker Compose, we can easily build and manage multiple containers. In this article, we provide a concrete step-by-step and code example to help you quickly install and run Symfony using Docker. I hope this article can help you, and I wish you success in Symfony development!

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