Hi,
sorry if I followed the wrong guide.

I followerd the official guide, too
https://hub.docker.com/_/mediawiki

I tried with docker compose, but nothing, during the first configuration it is impossible to connect the db to the mediawiki project.

I used the same stack.yml file, with the same password and user
During the configuration I used localhost as url of the db.

I optioned the following message:

Cannot access the database: :real_connect(): (HY000/2002): No such file or directory. Check the host, username and password and try again. If using "localhost" as the database host, try using "127.0.0.1" instead (or vice versa).

Ideas?

I think tha the two guides are equivalents

Angelo

@Manang: Please see my previous comment: Please provide a complete (!) list (!) of steps, as a list, with commands, which lead to that error message.

Hi,
my version of docker: 2.3.0.3 (45519)
host: mac os x 10.15.5

the steps are:
I create the stack.yml file with the following content:

# MediaWiki with MariaDB
#
# Access via "http://localhost:8080"
#   (or "http://$(docker-machine ip):8080" if using docker-machine)
version: '3'
services:
  mediawiki:
    image: mediawiki
    restart: always
    ports:
      - 8080:80
    links:
      - database
    volumes:
      - /var/www/html/images
      # After initial setup, download LocalSettings.php to the same directory as
      # this yaml and uncomment the following line and use compose to restart
      # the mediawiki service
      # - ./LocalSettings.php:/var/www/html/LocalSettings.php
  database:
    image: mariadb
    restart: always
    environment:
      # @see https://phabricator.wikimedia.org/source/mediawiki/browse/master/includes/DefaultSettings.php
      MYSQL_DATABASE: my_wiki
      MYSQL_USER: wikiuser
      MYSQL_PASSWORD: example
      MYSQL_RANDOM_ROOT_PASSWORD: 'yes'

After, I deployed the stack with the following command:

docker stack deploy -c stack.yml mediawiki

At the end I opened the configuration page of mediawiki (http://localhost:8080).
I put the following data

Database hos: localhost
database name: my_wiki
database username: wikiuser
database password: example

What I expected is that the configuration process recognizes the database, in this case mariaDb, but I tried with mysql and the situation is the same.
What I obtained is the following error message:

Cannot access the database: :real_connect(): (HY000/2002): No such file or directory. Check the host, username and password and try again. If using "localhost" as the database host, try using "127.0.0.1" instead (or vice versa).

Thanks
Angelo

I tried with your solution and it works!!

I also ran into this and the solution was the same: the hostname needs to be the name of the docker host when running with docker-compose. I'd submit a PR, but the error is on Docker Hub, and I don't see an obvious way to edit that.

In T254405#6758944, @AdamMillerchip wrote:

I also ran into this and the solution was the same: the hostname needs to be the name of the docker host when running with docker-compose. I'd submit a PR, but the error is on Docker Hub, and I don't see an obvious way to edit that.

The docs are located here:
https://github.com/docker-library/docs/tree/master/mediawiki