[SOLVED] EC2 Instance doesn't become managed after installing SSM Agent

Issue

I've installed SSM Agent (2.2.607.0) on Windows Server 2012 R2 Standard instance with the EC2 Config (4.9.2688.0). After installing it, i cannot see the server on the Managed Instances screen. I did the same steps on other servers (Windows and Linux) and it worked.

Tried to uninstall the EC2 Config, reinstalled it again with no luck. Tried to install a different SSM Agent version (2.2.546.0) with no luck also.

Any thoughts?

Solution

The agent is installed, but the instance still needs the proper role to communicate with the systems manager. Particularly this step of Configuring Access to Systems Manager.

By default, Systems Manager doesn't have permission to perform actions on your instances. You must grant access by using an IAM instance profile. An instance profile is a container that passes IAM role information to an Amazon EC2 instance at launch.

You should review the whole configuration guide and make sure you have configured all required roles appropriately.

Answered By - Brandon Miller