agent/ec2/ec2_metadata_client.go
func (c *ec2MetadataClientImpl) GetMetadata(path string) (string, error) {
	return c.client.GetMetadata(path)
}
func (c *ec2MetadataClientImpl) GetMetadata(path string) (string, error) {
	return c.client.GetMetadata(path)
}
// GetMetadata returns the metadata from instance metadata service specified by the path