Docker installation of Symfony: one-stop development environment configuration

Docker installation of Symfony: one-stop development environment configuration

Introduction:
When developing web applications, correct environment configuration is crucial. Symfony is a popular PHP framework that helps developers build efficient, flexible and scalable applications. However, Symfony installation and configuration can be complex. Using Docker can simplify this process and provide a one-stop development environment configuration. This article will show you how to install and configure Symfony using Docker, while providing specific code examples.

Part One: Docker Basics
Before we start, we need to understand some basic knowledge of Docker. Docker is an open source containerization platform that helps developers create, deploy and run applications. Containers are a lightweight virtualization technology that packages applications and their dependencies into a portable container to ensure that the application can run consistently in different environments.

The core concepts used in Docker include Image, Container and Repository. An image is a read-only file that contains all dependencies and configuration information for an application. Containers are executable instances created based on images in which applications can be run. The warehouse is a place used to store and share images.

Part 2: Installing Docker
Before starting to install Symfony, we first need to install Docker. Docker provides installation programs for different operating systems. You can choose the appropriate installation program for installation according to your operating system.

After the installation is complete, you can verify whether Docker is installed correctly by running the following command:

docker --version

If the version information of Docker can be displayed correctly, it means that Docker has been installed successfully.

Part 3: Create a Symfony Project
The first step in installing and configuring Symfony using Docker is to create a Symfony project. You can use Symfony's command line tools to create projects. First, open a terminal or command line window and navigate to the directory where you wish to create your project. Then run the following command:

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

The above command will create a Symfony project named "myproject" in the current directory.

Part 4: Configure Docker Image
Before continuing, we need to configure a Docker image for the Symfony project. First, you need to create a file named "Dockerfile" and copy the following content into the file:

FROM php:7.4-cli

RUN apt-get update && apt-get install -y 
    git 
    unzip 
    libpq-dev

RUN docker-php-ext-install pdo_pgsql

WORKDIR /app

CMD php -S 0.0.0.0:8000 -t public

The above Dockerfile specifies the CLI version using PHP 7.4 as the base image. Then, we installed some necessary dependencies via apt-get command, including git, unzip, and libpq-dev. Next, the pdo_pgsql extension was installed via the docker-php-ext-install command.

Finally, we set the current working directory to "/app" through the WORKDIR command and use the CMD command to run the Symfony development server.

Part 5: Building the Docker image
After completing the configuration of the Dockerfile, we need to use this file to build the Docker image. In a terminal or command line window, navigate to the root directory of the Symfony project and run the following command:

docker build -t myproject .

The above command will create a Docker image named "myproject" using the Dockerfile in the current directory.

Part 6: Running the Symfony application
After starting the Docker image, we can run the Symfony application. Run the following command in a terminal or command line window:

docker run -p 8000:8000 -v $(pwd):/app myproject

The above command will run the Symfony application on the local port 8000 and mount the current directory to the "/app" directory in the container.

Now you can access the Symfony application by visiting http://localhost:8000.

Conclusion:
Using Docker to install and configure Symfony can simplify the configuration process of the development environment. Through containerization technology, we can easily create, deploy and run Symfony applications while maintaining the consistency of the environment. With the specific code examples provided in this article, you can quickly get up and running with Symfony. I wish you success in your Symfony development journey!

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