func TestMain(m *testing.M) {
	startLockServers()

	// Initialize locker clients for dsync.
	var clnts []NetLocker
	for i := range nodes {
		clnts = append(clnts, newClient(nodes[i].URL))
	}

	ds = &Dsync{
		GetLockers: func() ([]NetLocker, string) { return clnts, uuid.New().String() },
		Timeouts: Timeouts{
			Acquire:         testDrwMutexAcquireTimeout,

	if bucket == "" {
		return errors.New("bucket name cannot be empty")
	}

	clnt, err := driver.getMinIOClient(ctx)
	if err != nil {
		return err
	}

	if prefix == "" {
		return clnt.MakeBucket(context.Background(), bucket, minio.MakeBucketOptions{Region: globalSite.Region()})
	}

	dirPath := buildMinioDir(prefix)

}

// NewDRWMutex - initializes a new dsync RW mutex.
func NewDRWMutex(clnt *Dsync, names ...string) *DRWMutex {
	restClnts, _ := clnt.GetLockers()
	sort.Strings(names)
	return &DRWMutex{
		writeLocks:           make([]string, len(restClnts)),
		readLocks:            make([]string, len(restClnts)),
		Names:                names,
		clnt:                 clnt,

func newHCClient() *madmin.AnonymousClient {
	clnt, e := madmin.NewAnonymousClientNoEndpoint()
	if e != nil {
		bugLogIf(GlobalContext, errors.New("Unable to initialize health check client"))
		return nil
	}
	clnt.SetCustomTransport(globalRemoteTargetTransport)
	return clnt
}

// heartBeat performs liveness check on remote endpoints.

		HealthCheckReconnectUnit: 200 * time.Millisecond,
		HealthCheckTimeout:       time.Second,
	}
	if err != nil {
		clnt.lastErr = err
		clnt.lastErrTime = time.Now()
	}

	if clnt.HealthCheckFn != nil {
		// make connection pre-emptively.
		go clnt.HealthCheckFn()
	}
	return clnt
}

// IsOnline returns whether the client is likely to be online.
func (c *Client) IsOnline() bool {

		UserMetadata:         userMetadata,
		DisableContentSha256: !opts.enableSha256,
		DisableMultipart:     !opts.enableMultipart,
	}

	clnt := globalMinioClient
	if !globalAPIConfig.permitRootAccess() {
		region := globalSite.Region()
		if region == "" {
			region = "us-east-1"
		}
		clnt, err = minio.New(globalLocalNodeName, &minio.Options{

		secure = globalMinioEndpointURL.Scheme == "https"
	}

	duration := time.Until(cred.Expiration)
	if duration > time.Hour || duration < time.Hour {
		// Always limit to 1 hour.
		duration = time.Hour
	}

	clnt, err := miniogo.New(host, &miniogo.Options{
		Creds:     credentials.NewStaticV4(cred.AccessKey, cred.SecretKey, cred.SessionToken),
		Secure:    secure,
		Transport: globalRemoteTargetTransport,
		Region:    globalSite.Region(),

	d := DiscoveryDoc{}
	req, err := http.NewRequest(http.MethodGet, u.String(), nil)
	if err != nil {
		return d, err
	}
	clnt := http.Client{
		Transport: transport,
	}
	resp, err := clnt.Do(req)
	if err != nil {
		return d, err
	}
	defer closeRespFn(resp.Body)
	if resp.StatusCode != http.StatusOK {

		return MinioReleaseURL + "minio.exe"
	}

	return MinioReleaseURL + "minio"
}

func getUpdateReaderFromURL(u *url.URL, transport http.RoundTripper, mode string) (io.ReadCloser, error) {
	clnt := &http.Client{
		Transport: transport,
	}
	req, err := http.NewRequest(http.MethodGet, u.String(), nil)
	if err != nil {
		return nil, AdminError{
			Code:       AdminUpdateUnexpectedFailure,

	if err != nil {
		return err
	}

	if token != "" {
		req.Header.Set("Authorization", token)
	}
	req.Header.Set("Content-Type", "application/json")

	clnt := http.Client{Transport: getRemoteInstanceTransport()}
	resp, err := clnt.Do(req)
	if err != nil {
		return err
	}

	xhttp.DrainBody(resp.Body)
	if resp.StatusCode != http.StatusOK {
		return errors.New(resp.Status)
	}