anchor.diff:  themselves, and metrics describing the infrastructure on which these
   systems run.
   
  -In this article we discuss the use of datadog to manage metrics produced
  -by two types of Kill Bill implementations on Amazon Web Services (AWS):
  +Datadog can be integrated with several types of Kill Bill installations. In this article we discuss the use of datadog to manage metrics produced
  +by two types of implementations on Amazon Web Services (AWS):
   Single Tier and Multitier. With the latest Amazon Machine Image (AMI)
   for Kill Bill, it is very easy to direct the Kill Bill metrics to
  -datadog and work with them in the way that suits your needs.
  +datadog and work with them in the way that best suits your needs.
   
   == Your Kill Bill System
   
  
positive.code: == Setting up the Authorization
  
  To authorize the sending of the Kill Bill metrics, it is necessary to
  edit two lines in the file /var/lib/tomcat/bin/setenv2.sh. This file
  contains configuration information for tomcat, which manages the
  KillBill web applications.
  
  This is a small file. The two lines to be edited are:
  
  -Dcom.killbill.datadog.enable=false
  
  -Dcom.killbill.datadog.apiKey=
  
  These should be changed to
  
  -Dcom.killbill.datadog.enable=true
  
  -Dcom.killbill.datadog.apiKey=__Your-API-Key__
  
  The API Key to be added is the same one contained in the command you
  used to install the agent.
  
negative.code: You should be running Kill Bill version 2021.9 or later. This version
  can be configured to provide its full collection of Kill Bill metrics to
  datadog (and several other analysis tools). If you open the Kill Bill
  admin page in your browser, it should show that you are
  running the "Kill Bill Premium edition":
  
  image::metrics-kb-admin.png[align=center]
  
  
  If you see this page you are ready to go. If not, you should upgrade
  your installation.
  
  While you are on this page, if you want to see all the metrics that Kill
  Bill has to offer, just add the path `/1.0/metrics` to the URL. Have fun!
  If you find these hard to understand, though, maybe datadog can help.
  
  == Setting up Datadog
  