Launch Auto Scaling Instances with an IAM Role
AWS Identity and Access Management (IAM) roles for EC2 instances make it easier for you to access other AWS services securely from within the EC2 instances. EC2 instances launched with an IAM role automatically have AWS security credentials available.
You can launch your Auto Scaling instances with an IAM role to automatically enable applications running on your instances to securely access other AWS resources. You do this by creating a launch configuration with an EC2 instance profile. An instance profile is a container for an IAM role. First, create an IAM role that has all the permissions required to access the AWS resources, then add your role to the instance profile.
For more information about IAM roles and instance profiles, see IAM Roles in the IAM User Guide.
Create an IAM role for your EC2 instances. The console creates an instance profile with the same name as the IAM role.
To create an IAM role
Open the IAM console at https://console.aws.amazon.com/iam/.
In the navigation pane, choose Roles, Create new role.
On the Select role type page, choose Select next to Amazon EC2.
On the Attach Policy page, select an AWS managed policy that grants your instances access to the resources that they need.
On the Set role name and review page, type a name for the role and choose Create role.
Create a Launch Configuration
When you create the launch configuration using the AWS Management Console, on the Configure Details page, select the role from IAM role. For more information, see Creating a Launch Configuration.
When you create the launch configuration using the create-launch-configuration command from the AWS CLI, specify the name of the instance profile as follows:
aws autoscaling create-launch-configuration --launch-configuration-name