Prerequisites

Before you start, you need to have some certain prerequisites in place:

Installing Docker Docker Desktop. If you’re using up-to-date versions of Windows or Mac, install Docker Desktop and you’re done. If you are a Linux user, Docker packages are popular and usually included in your distribution’s repository. For example, installing it on Ubuntu or Debian is as easy as: $ apt-get update && apt-get install docker. Installing PHP Packages with Docker and Composer Written on October 13th, 2017 by Karl Hughes Package management is a method for importing code (often from open source libraries) and keeping dependencies up to date in a software development project.

• PHP 7.1.3+
• Local machine running the latest version of Docker.

Get Started

Let's create a Symfony project and then see how we can dockerize it using Docker.

Symfony Requirements

In this tutorial we will use Symfony 4. These are the technical requirements to run it:

• PHP version: 7.1.3 or higher
• PHP extensions: (all of them are installed and enabled by default in PHP 7+)
  • Ctype
  • iconv
  • JSON
  • PCRE
  • Session
  • SimpleXML
  • Tokenizer

Step 1 - Install Symfony

Symfony utilizes Composer to manage its dependencies, similar to Laravel. So, before using Symfony, make sure you have Composer installed on your machine.

Install Composer

Composer is a tool for dependency management in PHP. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you. To a install it quickly, just open up a terminal and run this command:

Composer is multi-platform and it run equally well on Windows, Linux and macOS. Here you will get more information regarding how to install composer in each platform:

To make things simple, Symfony provides a tool to quickly check if your system meets these requirements. In addition, the tool provides recommendations if applicable. So run this command to install the tool:

Once you have fixed all the reported issues, uninstall the requirements checker to avoid leaking internal information about your application to visitors:

Step 2 - Create a Symfony Project

You can create a symfony skeleton project by issuing the Composer create-project command in your terminal:

The project directory will contain the following folders:

• config: holds config files
• src: where we place our PHP code
• bin: contains executable files
• var: where automatically-created files are stored (cache, log)
• vendor: contains third-party libraries
• public: contains publicly accessible files

Then, to install all dependencies and run the project, you need to run the following commands:

You will see your Symfony server running on: http://127.0.0.1:8000

Congratulations, you’ve created a Symfony project!

Step 3 - Dockerize the Project

Setup Docker

Before creating a container for the Symfony application and shipping it off, you need to install Docker on your local machine. For learning purpose, you will install Docker Community Edition. Select your OS from the list below and follow the setup instructions:

Make the docker App image

The next stage to improve your docker php development workflow is adding a Dockerfile to your project. The structure of a Dockerfile can be considered a series of instructions on how to build your container/image.

Start the Dockerfile by creating an empty file named Dockerfile in the root of your project. Then, complete each instruction according to the following example:

Building and Running the Container

Building the container is very straight forward once you have Docker and Docker Machine on your system. The following command will look for your Dockerfile and download all the necessary layers required to get your container image running. Afterwards, it will run the instructions in the Dockerfile and leave you with a container that is ready to start.

To build your php laravel docker container, you will use the docker build command and provide a tag or a name for the container, so you can reference it later when you want to run it. The final part of the command tells Docker which directory to build from.

The final step is to run the container you have just built using Docker:

The command tells Docker to run the container and forward the exposed port 8000 to port 8000 on your local machine. After you run this command, you should be able to visit http://localhost:8000 in your browser.

You can see the Docker containers that are currently running on your system (along with their Container IDs) with:

To turn off your Docker container, run:

Push to cloud

1. Create your app

In order to install your docker php example, just create a new app via cli or admin panel and set a port to 8000.

2. Push your docker container

3. Set up resources

4. Logs and app status

5. Release your app

After to click on the release button, your php docker tutorial will be deployed, Just click on the generated URL and you will get your app running.

Now you can deploy your Symfony app without a massive build time.

Bonus 1: SSL certificate for HTTPS

It's already done for you. If you need to connect your custom domain, SSL certificate will be provided for it.

Bonus 2: Autoscaling

With autoscaling the app will be scaled up when CPU and RAM load goes up and scaled down when it goes down.

Now you can deploy your Symfony app without a massive build time.

Package management is a method for importing code (often from open sourcelibraries) and keeping dependencies up to date in a software developmentproject. In PHP, we have a couple ways to manage packages, but the dominantchoice for modern PHP development is Composer.

While you can install PHP and Composer on your local machine directly, in thistutorial we’ll use Docker, which allows us to run PHP and Composer scriptswithout configuring either on our system directly. If you haven’t already, youshould install Docker for your operatingsystem.

Creating a PHP Timer Script

We are going to write a PHP script that sleeps for between 1 and 3 seconds, thentells us how long it waited. It’s very simple using the PHP Timerpackage, but we’ll need toimport it.

composer.json

Create a new file called composer.json and add the following to it:

This tells Composer about our dependencies — in this case, just one package —when we run the install command.

Installing the Dependencies

Ubuntu Install Composer

Next, we will install the dependencies using the official Composer Dockerimage:

Docker Install Composer Php Online

Let’s look at this docker command and see what’s going on:

• docker run is Docker’s command to run a command within a newcontainer. There are a lot ofoptions that you can pass in, so be sure to read the documentation.
• --rm tells Docker to “remove” the container after the command is run.Alternatively, you can save the container and name it to run it again.
• -v $(pwd):/app is telling Docker to mount avolume. You typicallypass in a path to a folder on your root directory, a colon, and then a path tothe folder in the container. Here we are mounting the current directory (alongwith the composer.json file we created) into a container. This mounting goesboth ways, so we will also see the /vendor folder created when Composer runs.
• composer/composer:latest is the actual image we’re using for this container.This will install the packages for PHP 7, but Composer also has images for olderversions of PHP.
• install is the Composer command that is going to be run. You can also doupdate or dump-autoload in this same manner.

Now all the dependencies are installed in a new /vendor folder, but we stillhave to import them and write our PHP script.

The PHP Script

Our PHP script imports the dependencies that are included in Composer’svendor/autoload.php file, starts a timer, waits between 1 and 3 seconds, thenoutputs the final time that the script took to run. This part of the tutorialworks the same way whether you use Docker or not. This file should be namedindex.php:

Running the PHP Script

Finally, we just need to run the new PHP script we created in another Dockercontainer. This is covered in more detail in our tutorial on running PHP scriptsin Docker, but the final command should be:

Install Php

You should see either 1 second, 2 seconds, or 3 seconds on your terminaloutput.

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