title: Celery ensure a task is run on each server
body: <p>I have a <code>flask</code> / <code>django</code> webapp running on multiple web servers, in particular the celery task will run and update a server at random. I'm in a situation where I need the task to run once on all servers and have each server updated by the task. </p>
  
  <p>How can I run a <code>celery</code> task and ensure the task is run once on all web servers?</p>