title: Migrating existing Windows service to Service Fabric
body: <p>Recently, I have encountered an issue where I want to make my existing Windows service to run in a SF cluster.
  However, this service does some registry operations, and it is dependent on it.</p>
  
  <p>At SF, this is meaningless (as the service can be shutdown and re-run on another node). What are my options to make a smooth transition?
  Use DB instead of a registry? Any other ideas (as in some cases the service stores data in the registry in case an error will occur in DB)?</p>