Docker PHP-FPM 7.3 & Nginx 1.18 on Alpine Linux

Example PHP-FPM 7.3 & Nginx 1.18 setup for Docker, build on Alpine Linux. The image is only +/- 35MB large.

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

• Built on the lightweight and secure Alpine Linux distribution
• Very small Docker image size (+/-35MB)
• Uses PHP 7.3 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 PM)
• The servers 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

Breaking changes (26/01/2019)

Please note that the new builds since 26/01/2019 are exposing a different port to access Nginx. To be able to run Nginx as a non-privileged user, the port it's running on needed to change to a non-privileged port (above 1024).

The last build of the old version that exposed port 80 was trafex/alpine-nginx-php7:ba1dd422

Usage

Start the Docker container:

docker run -p 80:8080 trafex/alpine-nginx-php7

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/alpine-nginx-php7

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/alpine-nginx-php7

PHP configuration:

docker run -v "`pwd`/php-setting.ini:/etc/php7/conf.d/settings.ini" trafex/alpine-nginx-php7

PHP-FPM configuration:

docker run -v "`pwd`/php-fpm-settings.conf:/etc/php7/php-fpm.d/server.conf" trafex/alpine-nginx-php7

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/alpine-nginx-php7: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/alpine-nginx-php7
COPY --chown=nginx --from=composer /app /var/www/html