title: Spec for http health checks?
body: <p>I want to implement a simple health check and make it available via http.</p>
  
  <p>Up to now I have only experience writing nagios plugins. Nagios has this <a href="https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/3/en/pluginapi.html" rel="nofollow noreferrer">API spec</a></p>
  
  <p>Is there already a common way how to write vendor-neutral health checks?</p>
  
  <p>If not, what should a sane health check return to make it portable to many different monitoring server implementations?</p>