# Prerequisites
<a name="tutorials-auto-scaling-group-prerequisites"></a>

To follow along in this tutorial:
+ Complete all of the steps in [Getting started with CodeDeploy](getting-started-codedeploy.md), including setting up and configuring the AWS CLI and creating an IAM instance profile (**CodeDeployDemo-EC2-Instance-Profile**) and a service role (**CodeDeployDemo**). A *service role* is a special type of IAM role that gives a service permission to act on your behalf.
+ If you create your Auto Scaling group with a launch template, you must add the following permissions:
  +  `ec2:RunInstances` 
  +  `ec2:CreateTags` 
  +  `iam:PassRole` 

  For more information, see [Step 2: Create a service role](getting-started-create-service-role.md), [Creating a launch template for an Auto Scaling group](https://docs.aws.amazon.com/autoscaling/ec2/userguide/create-launch-template.html), and [Launch template support](https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-launch-template-permissions.html) in the *Amazon EC2 Auto Scaling User Guide*. 
+  Create and use a revision that is compatible with an Ubuntu Server instance and CodeDeploy. For your revision, you can do one of the following:
  + Create and use the sample revision in [Step 2: Create a sample application revision](tutorials-on-premises-instance-2-create-sample-revision.md) in the [Tutorial: Deploy an application to an on-premises instance with CodeDeploy (Windows Server, Ubuntu Server, or Red Hat Enterprise Linux)](tutorials-on-premises-instance.md) tutorial. 
  + Create a revision on your own, see [Working with application revisions for CodeDeploy](application-revisions.md).
+ Create a Security Group named **CodeDeployDemo-AS-SG** with the following **Inbound rule**:
  + Type: HTTP
  + Source: Anywhere

  This is required to view your application and verify deployment success. For information on how to create a Security Group, see [Creating a security group](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/working-with-security-groups.html#creating-security-group) in the *Amazon EC2 user guide*.