anchor.diff:  metrics. This requires either a *cluster-reader* or *cluster-admin* level
   privileges to access.
   
  +[[cluster-metrics-authorization]]
   === Authorization
   
   The Hawkular Metrics service will authenticate the user against {product-title}
  
positive.code: cause Cassandra disk usage to unpredictably increase.
  ====
  
  The link:http://www.hawkular.org/docs/rest/rest-metrics.html[Hawkular Metrics
  documentation] covers how to use the API, but there are a few differences when
  dealing with the version of Hawkular Metrics configured for use on
  {product-title}:
  
  [[cluster-metrics-openshift-projects-and-hawkular-tenants]]
  === {product-title} Projects and Hawkular Tenants
  
negative.code: *Authorization* header.
  
  ifdef::openshift-origin[]
  [[cluster-metrics-accessing-heapster-directly]]
  == Accessing Heapster Directly
  
  Heapster has been configured to be only accessible via the
  