title: AWS: Switch an Aurora MySQL RDS Instance from multi-az to single-az
body: <p>I have an Aurora MySQL RDS deployment with a writer and reader with multi-az enabled.
  I'm having to look at trying to cut costs on AWS and one of the things that I want to downgrade is the multi-az to single-az.
  Is it possible to do this with an Aurora MySQL instance/cluster?
  The setting isn't available from the modify page.</p>
  
  <p>If it's not possible does this mean I need to recreate the DB with multi-az disabled?
  Would that mean the endpoint changes? This would be a problem for me as many applications use the current endpoint so if that was to change everything would go down until all the applications were updated.
  Is there a way to do this while maintaining the original endpoint?</p>
  
  <p>Any help with this would be greatly appreciated.</p>