anchor.diff:  
   Multiple instances of KAUI and the Kill Bill server are deployed in the VPC, each running on its own Ubuntu Linux server. AWS autoscaling is used to increase and decrease the number of instances of each package as needed.
   
  -Access to these instances is managed by an AWS *Elastic Load Balancer (ELB)*. The ELB routes each request to the correct package and distributes the requests across the available instances. The ELB will listen on port `80` for routing traffic to the Kill Bill instances, and on port `9090` for accessing KAUI.
  -
  -
  -The elastic load balancer will listen on port `80` for routing traffic to our Kill Bill server instances, and on port `9090` for accessing KAUI, our admin UI. Internally, both Kill Bill server instances, and KAUI server instances will listen on port `8080`. These ports will be different if HTTPS is used (see below).
  +Access to these instances is managed by an AWS *Elastic Load Balancer (ELB)*. The ELB routes each request to the correct package and distributes the requests across the available instances. The ELB will listen on port 80 for routing traffic to the Kill Bill instances, and on port 9090 for accessing KAUI.
  +
  +
  +The elastic load balancer will listen on port 80 for routing traffic to our Kill Bill server instances, and on port 9090 for accessing KAUI, our admin UI. Internally, both Kill Bill server instances, and KAUI server instances will listen on port 8080. These ports will be different if HTTPS is used (see below).
   
   The back end of the system is an *Aurora* database manager provided through the AWS *Relational Database System (RDS)*. Aurora is a robust database system developed by AWS, compatible with MySQL and Postgres. There are separate databases maintained for Kill Bill and KAUI.
   
  
positive.code: Congratulations! Your CloudFormation installation is ready to go!
  
  
  == TroubleShooting Section TO BE REVIEWED
  
  === Stack Creation
  
  There are a couple of possible issues when starting the stack from CloudFormation (CFN) and so the goal of this section
  is to provide some tips debugging the issues, and knowledge about where to find various logs. Also keep in mind
  that starting the CFN stack will typically take in the order of 15-20', mostly because of the time it takes to setup the 
  RDS cluster, so be patient...
  
  
  Let's start with the https://console.aws.amazon.com/cloudformation[CloudFormation console]: The stack will have a status which will be `CREATE_IN_PROGRESS` for the duration of the initialization, and will then either transition to `CREATE_COMPLETE` or `CREATE_FAILED`. In case of `CREATE_FAILED`, try to locate from the `Resources` tab which resource fail to initialize properly.
  
  === Possible Issues
  
  
negative.code: image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/cf-success.png[align=center]
  
  
  If you are using HTTPS you should be able to login to KAUI from your browser using the URL https://kaui.DOMAIN, where DOMAIN is *your* domain that you have used for your certificate. If you are using HTTP you will need to use the URL http://DNS_NAME where DNS_NAME is the *DNS name* for the KAUI load balancer as given on the Load Balancer dashboard.
  
  The KAUI login screen should appear. For an introduction to KAUI, see our http://docs.killbill.io/latest/getting_started.html#_using_kill_bill_with_kaui[Getting Started] guide. The default credentials are: `admin` / `password`. The first few requests might be a bit slow as Kill Bill initializes itself.
  
  