AWS Documentation » AWS Systems Manager » User Guide » Setting Up AWS Systems Manager » Setting Up AWS Systems Manager in Hybrid Environments » Creating an IAM Service Role for a Hybrid Environment

Creating an IAM Service Role for a Hybrid Environment

Servers and virtual machines (VMs) in a hybrid environment require an IAM role to communicate with the Systems Manager SSM service. The role grants AssumeRole trust to the SSM service.

Note

You only need to create the service role once for each AWS account.

To create an IAM service role (Tools for Windows PowerShell)

1. Create a text file (in this example it is named SSMService-Trust.json) with the following trust policy. Save the file with the .json file extension.

   {
     "Version": "2012-10-17",
     "Statement": {
       "Effect": "Allow",
       "Principal": {"Service": "ssm.amazonaws.com"},
       "Action": "sts:AssumeRole"
     }
   }

2. Use New-IAMRole as follows to create a service role. This example creates a role named SSMServiceRole.

   New-IAMRole -RoleName SSMServiceRole -AssumeRolePolicyDocument (Get-Content -raw SSMService-Trust.json)

3. Use Register-IAMRolePolicy as follows to enable the SSMServiceRole to create a session token. The session token gives your managed instance permission to run commands using Systems Manager.

   Register-IAMRolePolicy -RoleName SSMServiceRole -PolicyArn arn:aws:iam::aws:policy/service-role/AmazonEC2RoleforSSM

To create an IAM service role (AWS CLI)

1. Create a text file (in this example it is named SSMService-Trust.json) with the following trust policy. Save the file with the .json file extension.

   {
     "Version": "2012-10-17",
     "Statement": {
       "Effect": "Allow",
       "Principal": {"Service": "ssm.amazonaws.com"},
       "Action": "sts:AssumeRole"
     }
   }

2. Use the create-role command to create the service role. This example creates a role named SSMServiceRole.

   aws iam create-role --role-name SSMServiceRole --assume-role-policy-document file://SSMService-Trust.json 

3. Use attach-role-policy as follows to enable the SSMServiceRole to create a session token. The session token gives your managed instance permission to run commands using Systems Manager.

   aws iam attach-role-policy --role-name SSMServiceRole --policy-arn arn:aws:iam::aws:policy/service-role/AmazonEC2RoleforSSM 

Note

Users in your company or organization who will use Systems Manager on your hybrid machines must be granted permission in IAM to call the SSM API. For more information, see Configuring Access to Systems Manager.