Docker/Hub

Docker maintains a list of official images which "are a curated set of Docker repositories hosted on Docker Hub." These images are official to Docker and not to MediaWiki. The images meet Docker's best practices of what they believe makes a good base image, it does not fulfill all of the roles and capabilities that MediaWiki has to offer. The image intentionally includes only the minimal amount of software necessary to run MediaWiki. It is designed to be extended from rather than used directly.

The MediaWiki image can be found at:

https://hub.docker.com/_/mediawiki

The source code can be found at:

https://github.com/wikimedia/mediawiki-docker

When changes are made to this git repository, they must be deployed to Docker hub by modifying the configuration file in their repository:

https://github.com/docker-library/official-images/blob/master/library/mediawiki

Using on a single web server

A multi-server environment should use Kubernetes instead of Docker Compose. In fact, it may be better for a single server to use microk8s than Docker Compose (although for users operating in virtual machines, such as libxen or qubes appVM's, microk8s may not run well or at all).

Quick Start

1. Install Docker
2. Install Docker Compose
3. Create a folder for your project.
4. Create a docker-compose.yml with the sample contents.
5. Run docker-compose up -d.
6. After running the installer, add the LocalSettings.php file and mount it into the container by uncommenting the relevant line in your docker-compose.yml.

Initial docker-compose.yml

This sample assumes you will use a SQLite database. This makes MediaWiki available on port 80.

 services:
  web:
    image: mediawiki
    ports:
      - 80:80
    volumes:
      # - ./LocalSettings.php:/var/www/html/LocalSettings.php
      - database:/var/www/data
      - images:/var/www/html/images
volumes:
    database:
    images:

Using for MediaWiki Development

Quick Start

1. Install Docker
2. Install Docker Compose
3. Create a folder for your project.
4. Create a docker-compose.yml with the sample contents.
5. Clone MediaWiki in a subfolder called html.
6. Install the PHP dependencies by running docker run --rm --interactive --tty --volume $PWD/html:/app composer install or composer install -d ./html if you have composer installed.
7. Disable OPCache
8. Run docker-compose up

Sample docker-compose.yml

This sample assumes you will use a SQLite database. This makes MediaWiki available on port 8888.

 services:
  web:
    image: mediawiki
    ports:
      - 8888:80
    volumes:
      - ./html:/var/www/html:cached
      - database:/var/www/data
volumes:
    database:

Disabling OPCache

Create a .htaccess file in the web root, typically html/.htaccess with the following content:

php_flag opcache.enable Off

Adding a Database Server

This is a more complex example with an attached MariaDB server. MediaWiki should be configured to reach the database server at the database hostname.

 services:
  MediaWiki:
    container_name: wiki
    image: mediawiki
    restart: always
    ports: 
      - 80:80
    links:
      - database
    volumes:
      - images:/var/www/html/images
      # - ./LocalSettings.php:/var/www/html/LocalSettings.php
  database:
    container_name: db
    image: mysql
    environment:
      MYSQL_DATABASE: mediawiki
      MYSQL_USER: wiki
      MYSQL_PASSWORD: P@ssw0rd
      MYSQL_RANDOM_ROOT_PASSWORD: 'yes'
    volumes:
      - dbvolume:/var/lib/mysql
volumes:
  dbvolume:
      external: true
  images:

In order for a separate volume to store the database to have the correct name, we create it using docker:

docker volume create dbvolume

We are building and launching a stack of containers with the MediaWiki application and the database described in the wiki.yml file:

docker compose -f wiki.yml up -d

After installation, proceed to LocalSettings.php and we throw it to wiki.yml.

After that, go to wiki.yml and comment it out:

volumes:
  - images:/var/www/html/images
  - ./LocalSettings.php:/var/www/html/LocalSettings.php 

Restart the docker compose stack:

docker-compose -f wiki.yml stop

docker-compose -f wiki.yml up -d