ms.server = httpServer
	url, err := url.Parse(httpServer.URL)
	if err != nil {
		return nil, fmt.Errorf("parse URL failed: %v", err)
	}
	if err := os.Setenv("GCE_METADATA_HOST", url.Host); err != nil {
		fmt.Printf("Error running os.Setenv: %v", err)
		ms.Stop()
		return nil, err
	}
	return ms, nil
}

func (ms *MetadataServer) setToken(t string) {
	ms.mutex.Lock()

	return metadataSupplier{
		Property: property,
		Fn:       fn,
	}
}

func isMetadataEndpointAccessible() bool {
	// From the Go package, but private so copied here
	const metadataHostEnv = "GCE_METADATA_HOST"
	const metadataIP = "169.254.169.254"
	host := os.Getenv(metadataHostEnv)
	if host == "" {
		host = metadataIP
	}
	_, err := net.DialTimeout("tcp", defaultPort(host, "80"), 5*time.Second)
	if err != nil {