func getRegion(ipv6 bool, headers map[string]string) string {
	region, _ := getAWSInfo("placement/region", ipv6, headers)
	return region
}

// getAvailabilityZone returns the AvailabilityZone that the instance is running in.
func getAvailabilityZone(ipv6 bool, headers map[string]string) string {
	az, _ := getAWSInfo("placement/availability-zone", ipv6, headers)
	return az
}