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README.md

Pixelfed Docker images

Runtimes

The Pixelfed Dockerfile support multiple target runtimes (Apache, Nginx + FPM, and fpm).

You can consider a runtime target as individual Dockerfiles, but instead, all of them are build from the same optimized Dockerfile, sharing +90% of their configuration and packages.

Apache

Building a custom Pixelfed Docker image using Apache + mod_php can be achieved the following way.

docker build (Apache)

docker build \
 -f contrib/docker/Dockerfile \
 --target apache-runtime \
 --tag <docker hub user>/<docker hub repo> \
 .

docker compose (Apache)

version: "3"

services:
  app:
    build:
      context: .
      dockerfile: contrib/docker/Dockerfile
      target: apache-runtime

Nginx

Building a custom Pixelfed Docker image using nginx + FPM can be achieved the following way.

docker build (nginx)

docker build \
 -f contrib/docker/Dockerfile \
 --target nginx-runtime \
 --build-arg 'PHP_BASE_TYPE=fpm' \
 --tag <docker hub user>/<docker hub repo> \
 .

docker compose (nginx)

version: "3"

services:
 app:
  build:
   context: .
   dockerfile: contrib/docker/Dockerfile
   target: nginx-runtime
   args:
     PHP_BASE_TYPE: fpm

FPM

Building a custom Pixelfed Docker image using FPM (only) can be achieved the following way.

docker build (fpm)

docker build \
 -f contrib/docker/Dockerfile \
 --target fpm-runtime \
 --build-arg 'PHP_BASE_TYPE=fpm' \
 --tag <docker hub user>/<docker hub repo> \
 .

docker compose (fpm)

version: "3"

services:
 app:
  build:
   context: .
   dockerfile: contrib/docker/Dockerfile
   target: fpm-runtime
   args:
     PHP_BASE_TYPE: fpm

Build settings (arguments)

The Pixelfed Dockerfile utilizes Docker Multi-stage builds and Build arguments.

Using build arguments allow us to create a flexible and more maintainable Dockerfile, supporting multiple runtimes (FPM, Nginx, Apache + mod_php) and end-user flexibility without having to fork or copy the Dockerfile.

Build arguments can be configured using --build-arg 'name=value' for docker build, docker compose build and docker buildx build. For docker-compose.yml the args key for build can be used.

PHP_VERSION

The PHP version to use when building the runtime container.

Any valid Docker Hub PHP version is acceptable here, as long as it's published to Docker Hub

Example values:

  • 8 will use the latest version of PHP 8
  • 8.1 will use the latest version of PHP 8.1
  • 8.2.14 will use PHP 8.2.14
  • latest will use whatever is the latest PHP version

Default value: 8.1

PECL_EXTENSIONS

PECL extensions to install via pecl install

Use PECL_EXTENSIONS_EXTRA if you want to add additional extenstions.

Only change this setting if you want to change the baseline extensions.

See the PECL extensions documentation on Docker Hub for more information.

Default value: imagick redis

PECL_EXTENSIONS_EXTRA

Extra PECL extensions (separated by space) to install via pecl install

See the PECL extensions documentation on Docker Hub for more information.

Default value: ""

PHP_EXTENSIONS

PHP Extensions to install via docker-php-ext-install.

NOTE: use PHP_EXTENSIONS_EXTRA if you want to add additional extensions, only override this if you want to change the baseline extensions.

See the How to install more PHP extensions documentation on Docker Hub for more information

Default value: intl bcmath zip pcntl exif curl gd

PHP_EXTENSIONS_EXTRA

Extra PHP Extensions (separated by space) to install via docker-php-ext-install.

See the How to install more PHP extensions documentation on Docker Hub for more information.

Default value: ""

PHP_DATABASE_EXTENSIONS

PHP database extensions to install.

By default we install both pgsql and mysql since it's more convinient (and adds very little build time! but can be overwritten here if required.

Default value: pdo_pgsql pdo_mysql

COMPOSER_VERSION

The version of Composer to install.

Please see the Docker Hub composer page for valid values.

Default value: 2.6

APT_PACKAGES_EXTRA

Extra APT packages (separated by space) that should be installed inside the image by apt-get install

Default value: ""

NGINX_VERSION

Version of nginx to when targeting nginx-runtime.

Please see the Docker Hub nginx page for available versions.

Default value: 1.25.3

PHP_BASE_TYPE

The PHP base image layer to use when building the runtime container.

When targeting

Valid values:

  • apache
  • fpm
  • cli

Default value: apache

PHP_DEBIAN_RELEASE

The Debian Operation System version to use.

Valid values:

  • bullseye
  • bookworm

Default value: bullseye