Docker MYSQL '[2002] Connection refused'
<p>I was trying out Docker for the first time. Got a LEMP stack up and running, but I can't connect to the MYSQL Database. Not on my Symfony application, not on PHPMyAdmin. The applications are returning the following error code:</p>

<blockquote>
  <p>An exception occured in driver: SQLSTATE[HY000] [2002] Connection refused</p>
</blockquote>

<p>This is my docker-compose.yml:</p>

<pre><code>nginx:
    image: tutum/nginx
    ports:
        - "80:80"
    links:
        - phpfpm
    volumes:
        - ./nginx/default:/etc/nginx/sites-available/default
        - ./nginx/default:/etc/nginx/sites-enabled/default

        - ./logs/nginx-error.log:/var/log/nginx/error.log
        - ./logs/nginx-access.log:/var/log/nginx/access.log
phpfpm:
    build: phpfpm/
    ports:
        - "9000:9000"
    volumes:
        - ./public:/usr/share/nginx/html
mysql:
  image: mariadb
  ports:
    - 3306:3306
  environment:
    MYSQL_ROOT_PASSWORD: admin
phpmyadmin:
  image: phpmyadmin/phpmyadmin
  restart: always
  links:
    - mysql
  ports:
    - 8183:80
  environment:
    MYSQL_USERNAME: admin
    MYSQL_ROOT_PASSWORD: admin
    PMA_ARBITRARY: 1
</code></pre>

<p>Dockerfile PHPFPM:</p>

<pre><code>    FROM php:fpm

RUN docker-php-ext-enable opcache
RUN apt-get update \
  &amp;&amp; apt-get install -y --no-install-recommends libpq-dev \
  &amp;&amp; docker-php-ext-install mysqli pdo_pgsql pdo_mysql
</code></pre>

<p>GitHub URL: <a href="https://github.com/MolengraafFrank/DockerSymfony" rel="noreferrer">https://github.com/MolengraafFrank/DockerSymfony</a></p>

<p>Could someone help me out? Thank you for your time.</p>