title: Correct MySQL configuration for Ruby on Rails Database.yml file
body: <p>I have this configuration:</p>
  
  <pre><code>development:
    adapter: mysql2
    encoding: utf8
    database: my_db_name
    username: root
    password: my_password
    host: mysql://127.0.0.1:3306
  </code></pre>
  
  <p>And I am getting this error:</p>
  
  <pre><code>Unknown MySQL server host 'mysql://127.0.0.1:3306' (1)
  </code></pre>
  
  <p>Is there something obvious that I am doing incorrectly? </p>