Docker PHP-FPM 8.1 & Nginx 1.22 on Alpine Linux

Example PHP-FPM 8.1 & Nginx 1.22 container image for Docker, built on Alpine Linux.

Repository: https://github.com/TrafeX/docker-php-nginx

Built on the lightweight and secure Alpine Linux distribution
Multi-platform, supporting AMD4, ARMv6, ARMv7, ARM64
Very small Docker image size (+/-40MB)
Uses PHP 8.1 for better performance, lower CPU usage & memory footprint
Optimized for 100 concurrent users
Optimized to only use resources when there's traffic (by using PHP-FPM's on-demand process manager)
The services Nginx, PHP-FPM and supervisord run under a non-privileged user (nobody) to make it more secure
The logs of all the services are redirected to the output of the Docker container (visible with docker logs -f <container name>)
Follows the KISS principle (Keep It Simple, Stupid) to make it easy to understand and adjust the image to your needs

I can help you with Containerization, Kubernetes, Monitoring, Infrastructure as Code and other DevOps challenges.

Goal of this project

The goal of this container image is to provide an example for running Nginx and PHP-FPM in a container which follows the best practices and is easy to understand and modify to your needs.

Usage

Start the Docker container:

docker run -p 80:8080 trafex/php-nginx

See the PHP info on http://localhost, or the static html page on http://localhost/test.html

Or mount your own code to be served by PHP-FPM & Nginx

docker run -p 80:8080 -v ~/my-codebase:/var/www/html trafex/php-nginx

Docker Hub repository name change

Since we switched to PHP8 the repository name trafex/alpine-nginx-php7 didn't make sense anymore. Because you can't change the name of the repository on Docker Hub I created a new one.

From now on this image can be pulled from Docker Hub under the name trafex/php-nginx.

Configuration

In config/ you'll find the default configuration files for Nginx, PHP and PHP-FPM. If you want to extend or customize that you can do so by mounting a configuration file in the correct folder;

Nginx configuration:

docker run -v "`pwd`/nginx-server.conf:/etc/nginx/conf.d/server.conf" trafex/php-nginx

PHP configuration:

docker run -v "`pwd`/php-setting.ini:/etc/php81/conf.d/settings.ini" trafex/php-nginx

PHP-FPM configuration:

docker run -v "`pwd`/php-fpm-settings.conf:/etc/php8/php-fpm.d/server.conf" trafex/php-nginx

Note; Because -v requires an absolute path I've added pwd in the example to return the absolute path to the current directory

Adding composer

If you need Composer in your project, here's an easy way to add it.

FROM trafex/php-nginx:latest

# Install composer from the official image
COPY --from=composer /usr/bin/composer /usr/bin/composer

# Run composer install to install the dependencies
RUN composer install --optimize-autoloader --no-interaction --no-progress

Building with composer

If you are building an image with source code in it and dependencies managed by composer then the definition can be improved. The dependencies should be retrieved by the composer but the composer itself (/usr/bin/composer) is not necessary to be included in the image.

FROM composer AS composer

# copying the source directory and install the dependencies with composer
COPY <your_directory>/ /app

# run composer install to install the dependencies
RUN composer install \
  --optimize-autoloader \
  --no-interaction \
  --no-progress

# continue stage build with the desired image and copy the source including the
# dependencies downloaded by composer
FROM trafex/php-nginx
COPY --chown=nginx --from=composer /app /var/www/html