Developer story

Leverage the IMDSv1 endpoint to fetch the instance hostname in AWS to avoid the dependency on the  AWS Tools for PowerShell library (https://github.com/aws/aws-tools-for-powershell) library that may not be available, especially in the BYOH use case.

Engineering Details

This approach was introduced in a previous PR (https://github.com/openshift/windows-machine-config-operator/pull/1284) for GCP.  

Use the Instance Metadata Service Version 1 (IMDSv1) to fetch the hostname in AWS. IMDSv1 will continue to be supported indefinitely as per AWS docs., hence is it safe to use it.

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-retrieval.html

Acceptance Criteria

• IMDSv1 is used to retrieve the hostname in AWS