Posted On: Aug 24, 2020

We’ve introduced the following 5 fields to the instance metadata service: region, placement group name, partition number, host ID, and availability zone-ID. You can use these fields after launch or while your instance is running to understand your instance location. This is useful for populating the region for your AWS environment. Additionally, these fields help you identify your instance placement information within an availability zone.  

These instance metadata categories are now available in all commercial regions. 

To learn more about these fields, see the user guide.

To learn more about partition placement groups, see the user guide for EC2 Partition Placement Groups.