[ec2-user@i-1234.... ~]$ sudo poweroff

[ec2-user@i-1234.... ~]$ curl http://169.254.169.254/latest/meta-data/iam/info
{
  "Code" : "Success",
  "LastUpdated" : "2019-01-18T20:30:58Z",
  "InstanceProfileArn" : "arn:aws:iam::123456789012:instance-profile/...",
  "InstanceProfileId" : "AIPA..."
}

[ec2-user@i-1234.... ~]$ curl http://169.254.169.254/latest/meta-data/instance-id
i-abcd1234abcd1234