Wikimedia Labs is a bit like Heroku (for which we have 167 questions), but restricted to Wikimedia-related activities.

People can create/manage instances.  
[Puppet][1] is used for almost everything, and all configuration (except passwords) is [open][2].  
Despite having "Labs" in the name, the platform is used for live production, for instance serving web requests, executing data tasks, etc.

So, if I have a well-researched question about a Puppet deployment to Wikimedia Labs, is it on-topic or off-topic here?


  [1]: https://en.wikipedia.org/wiki/Puppet_%28software%29
  [2]: http://git.wikimedia.org/tree/operations/puppet.git