anchor.diff:  The first time you login, you will see a warning message asking if you want to add this host to your list of hosts. You should answer `yes`.
   
   You will now be able to explore your instance and perform various configuration and maintenance tasks. To exit from your login, type `exit`.
  -
  -
   
   
   === Create the Databases
  
positive.code: 
  All other options will disappear. Click *Launch*.
  
  The next page is titled *Choose Instance Type*. Your instance type is already chosen, so click *Configure Instance Details* at the bottom of the page.
  
  The next page will provide you with a long list of options. The first option is *Number of Instances*. Set the number of instances you wish to launch. Each instance will have essentially the same configuration, including the same image, the same subnet and availability zone, and the same security group.
  
  After setting the number of instances, scroll down to the bottom of the page. The last section is titled *Advanced Settings*. In this section you should set the configuration file you produced above. The setting panel should look like this:
  
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/multitier-userdata.png[align=center]
  
  Now click *Review and Launch* at the bottom of the page. The following page is headed *Review Instance Launch*. This provides a chance to review the details of your chosen instances. Then click *Launch* at the bottom of the page.
  
  ==== 3. Setup a Key Pair
  
  Next you will see a very important popup that asks you to choose or create a *key pair*.
  
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/multitier-keypair.png[align=center]
  
  The key pair provides the credentials you will need to login to your EC2 instances. For details about key pairs, see the https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html[AWS documentation]. We recommend that you create a new key pair. All your instances can use the same one. Give the key pair a simple, easy to remember name such as `My-Key-Pair`. Then click **Download Key Pair**. Important: You *must* save the private key that will be generated in this step. If you lose this key, you will *not* be able to login to your instances.
  
  ==== 4. Launch your Instances
  
  When the key pair is generated, click *Launch Instances*. You should see the screen below:
  
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/multitier-launching.png[align=center]
  
  Your instances are finally launching! To follow what is happening on the EC2 Dashboard, scroll all the way down to the bottom, and click *View Instance* at the bottom right. This will take you to the *Instances* screen which is part of the EC2 Dashboard.
  
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/multitier-instances.png[align=center]
  
  
  In a short time, the *Instance State* for each instance should indicate *Running*. You will need to scroll to the right to see all of the information available about your instances.
  
  ==== 5. Setup Security Rules
  
  You are almost set, but there is one more thing you need to do, and that is to scroll down in the menu on the left side to select *Security Groups*. You should see a list of two or more groups. Select the group whose name begins with `Kill Bill on AWS`, then scroll to the bottom and select the tab for *Inbound Rules*. You should see:
  
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/multitier-inbound-original.png[align=center]
  
  
negative.code: 
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws/multitier-configure.png[align=center]
  
  Be sure to select the region you plan to operate in. In most cases you should accept the other defaults. Then click *Continue to Launch*.
  
  The next page will give you several options for the launch method. We recommend that you choose *Launch through EC2*.
  
  