Decouple ServiceUpdate to ServerUpdate to be more native (#8138)

The change now is to ensure that we take custom URL as
well for updating the deployment, this is required for
hotfix deliveries for certain deployments - other than
the community release.

This commit changes the previous work d65a2c6725
with newer set of requirements.

Also deprecates PeerUptime()

cmd/admin-handlers.go

@@ -1,5 +1,5 @@
 /*
- * MinIO Cloud Storage, (C) 2016, 2017, 2018, 2019 MinIO, Inc.
+ * MinIO Cloud Storage, (C) 2016-2019 MinIO, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,10 @@ import (
 	"io"
 	"io/ioutil"
 	"net/http"
+	"net/url"
 	"os"
+	"path"
+	"runtime"
 	"sort"
 	"strconv"
 	"strings"
@@ -66,18 +69,27 @@ const (
 	mgmtForceStop                = "forceStop"
 )
 
-func updateServer() (us madmin.ServiceUpdateStatus, err error) {
+func updateServer(updateURL, sha256Hex string, latestReleaseTime time.Time) (us madmin.ServerUpdateStatus, err error) {
 	minioMode := getMinioMode()
-	updateMsg, sha256Hex, _, latestReleaseTime, err := getUpdateInfo(updateTimeout, minioMode)
-	if err != nil {
-		return us, err
+	// No inputs provided we should try to update using the default URL.
+	if updateURL == "" && sha256Hex == "" && latestReleaseTime.IsZero() {
+		var updateMsg string
+		updateMsg, sha256Hex, _, latestReleaseTime, err = getUpdateInfo(updateTimeout, minioMode)
+		if err != nil {
+			return us, err
+		}
+		if updateMsg == "" {
+			us.CurrentVersion = Version
+			us.UpdatedVersion = Version
+			return us, nil
+		}
+		if runtime.GOOS == "windows" {
+			updateURL = minioReleaseURL + "minio.exe"
+		} else {
+			updateURL = minioReleaseURL + "minio"
+		}
 	}
-	if updateMsg == "" {
-		us.CurrentVersion = Version
-		us.UpdatedVersion = Version
-		return us, nil
-	}
-	if err = doUpdate(sha256Hex, minioMode, latestReleaseTime, true); err != nil {
+	if err = doUpdate(updateURL, sha256Hex, minioMode); err != nil {
 		return us, err
 	}
 	us.CurrentVersion = Version
@@ -85,12 +97,88 @@ func updateServer() (us madmin.ServiceUpdateStatus, err error) {
 	return us, nil
 }
 
-// ServiceActionHandler - POST /minio/admin/v1/service
-// Body: {"action": <action>}
+// ServerUpdateHandler - POST /minio/admin/v1/update?updateURL={updateURL}
 // ----------
-// restarts/updates/stops minio server gracefully. In a distributed setup,
-// restarts/updates/stops all the servers in the cluster. Also asks for
-// server version and uptime.
+// updates all minio servers and restarts them gracefully.
+func (a adminAPIHandlers) ServerUpdateHandler(w http.ResponseWriter, r *http.Request) {
+	ctx := newContext(r, w, "ServerUpdate")
+
+	objectAPI := validateAdminReq(ctx, w, r)
+	if objectAPI == nil {
+		return
+	}
+
+	if globalInplaceUpdateDisabled {
+		// if MINIO_UPDATE=off - inplace update is disabled, mostly
+		// in containers.
+		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrMethodNotAllowed), r.URL)
+		return
+	}
+
+	vars := mux.Vars(r)
+	updateURL := vars[peerRESTUpdateURL]
+	mode := getMinioMode()
+	var sha256Hex string
+	var latestReleaseTime time.Time
+	if updateURL != "" {
+		u, err := url.Parse(updateURL)
+		if err != nil {
+			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
+			return
+		}
+
+		content, err := downloadReleaseURL(updateURL, updateTimeout, mode)
+		if err != nil {
+			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
+			return
+		}
+
+		sha256Hex, latestReleaseTime, err = parseReleaseData(content)
+		if err != nil {
+			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
+			return
+		}
+
+		if runtime.GOOS == "windows" {
+			u.Path = path.Dir(u.Path) + "minio.exe"
+		} else {
+			u.Path = path.Dir(u.Path) + "minio"
+		}
+
+		updateURL = u.String()
+	}
+
+	for _, nerr := range globalNotificationSys.ServerUpdate(updateURL, sha256Hex, latestReleaseTime) {
+		if nerr.Err != nil {
+			logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
+			logger.LogIf(ctx, nerr.Err)
+		}
+	}
+
+	updateStatus, err := updateServer(updateURL, sha256Hex, latestReleaseTime)
+	if err != nil {
+		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
+		return
+	}
+
+	// Marshal API response
+	jsonBytes, err := json.Marshal(updateStatus)
+	if err != nil {
+		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
+		return
+	}
+
+	writeSuccessResponseJSON(w, jsonBytes)
+
+	if updateStatus.CurrentVersion != updateStatus.UpdatedVersion {
+		// We did upgrade - restart all services.
+		globalServiceSignalCh <- serviceRestart
+	}
+}
+
+// ServiceActionHandler - POST /minio/admin/v1/service?action={action}
+// ----------
+// restarts/stops minio server gracefully. In a distributed setup,
 func (a adminAPIHandlers) ServiceActionHandler(w http.ResponseWriter, r *http.Request) {
 	ctx := newContext(r, w, "ServiceAction")
 
@@ -108,80 +196,12 @@ func (a adminAPIHandlers) ServiceActionHandler(w http.ResponseWriter, r *http.Re
 		serviceSig = serviceRestart
 	case madmin.ServiceActionStop:
 		serviceSig = serviceStop
-	case madmin.ServiceActionUpdate:
-		if globalInplaceUpdateDisabled {
-			// if MINIO_UPDATE=off - inplace update is disabled, mostly
-			// in containers.
-			writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrMethodNotAllowed), r.URL)
-			return
-		}
-		// update, updates the server and restarts them.
-		serviceSig = serviceUpdate | serviceRestart
-	case madmin.ServiceActionStatus:
-		serviceSig = serviceStatus
 	default:
 		logger.LogIf(ctx, fmt.Errorf("Unrecognized service action %s requested", action))
 		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrMalformedPOSTRequest), r.URL)
 		return
 	}
 
-	if serviceSig&serviceUpdate == serviceUpdate {
-		for _, nerr := range globalNotificationSys.SignalService(serviceSig) {
-			if nerr.Err != nil {
-				logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
-				logger.LogIf(ctx, nerr.Err)
-			}
-		}
-
-		updateStatus, err := updateServer()
-		if err != nil {
-			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
-			return
-		}
-
-		// Marshal API response
-		jsonBytes, err := json.Marshal(updateStatus)
-		if err != nil {
-			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
-			return
-		}
-
-		writeSuccessResponseJSON(w, jsonBytes)
-
-		if updateStatus.CurrentVersion != updateStatus.UpdatedVersion {
-			// We did upgrade - restart all services.
-			globalServiceSignalCh <- serviceSig
-		}
-		return
-	}
-
-	if serviceSig == serviceStatus {
-		// Fetch server version
-		serverVersion := madmin.ServerVersion{
-			Version:  Version,
-			CommitID: CommitID,
-		}
-
-		// Fetch uptimes from all peers and pick the latest.
-		uptime := getPeerUptimes(globalNotificationSys.ServerInfo(ctx))
-
-		// Create API response
-		serverStatus := madmin.ServiceStatus{
-			ServerVersion: serverVersion,
-			Uptime:        uptime,
-		}
-
-		// Marshal API response
-		jsonBytes, err := json.Marshal(serverStatus)
-		if err != nil {
-			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
-			return
-		}
-
-		writeSuccessResponseJSON(w, jsonBytes)
-		return
-	}
-
 	// Notify all other MinIO peers signal service.
 	for _, nerr := range globalNotificationSys.SignalService(serviceSig) {
 		if nerr.Err != nil {

cmd/admin-handlers_test.go

@@ -349,8 +349,7 @@ func initTestXLObjLayer() (ObjectLayer, []string, error) {
 type cmdType int
 
 const (
-	statusCmd cmdType = iota
-	restartCmd
+	restartCmd cmdType = iota
 	stopCmd
 )
 
@@ -358,14 +357,12 @@ const (
 // value to its corresponding serviceSignal value.
 func (c cmdType) toServiceSignal() serviceSignal {
 	switch c {
-	case statusCmd:
-		return serviceStatus
 	case restartCmd:
 		return serviceRestart
 	case stopCmd:
 		return serviceStop
 	}
-	return serviceStatus
+	return serviceRestart
 }
 
 func (c cmdType) toServiceAction() madmin.ServiceAction {
@@ -374,10 +371,8 @@ func (c cmdType) toServiceAction() madmin.ServiceAction {
 		return madmin.ServiceActionRestart
 	case stopCmd:
 		return madmin.ServiceActionStop
-	case statusCmd:
-		return madmin.ServiceActionStatus
 	}
-	return madmin.ServiceActionStatus
+	return madmin.ServiceActionRestart
 }
 
 // testServiceSignalReceiver - Helper function that simulates a
@@ -449,28 +444,11 @@ func testServicesCmdHandler(cmd cmdType, t *testing.T) {
 		t.Errorf("Expected to receive %d status code but received %d. Body (%s)",
 			http.StatusOK, rec.Code, string(resp))
 	}
-	if cmd == statusCmd {
-		expectedInfo := madmin.ServiceStatus{
-			ServerVersion: madmin.ServerVersion{Version: Version, CommitID: CommitID},
-		}
-		receivedInfo := madmin.ServiceStatus{}
-		if jsonErr := json.Unmarshal(rec.Body.Bytes(), &receivedInfo); jsonErr != nil {
-			t.Errorf("Failed to unmarshal StorageInfo - %v", jsonErr)
-		}
-		if expectedInfo.ServerVersion != receivedInfo.ServerVersion {
-			t.Errorf("Expected storage info and received storage info differ, %v %v", expectedInfo, receivedInfo)
-		}
-	}
 
 	// Wait until testServiceSignalReceiver() called in a goroutine quits.
 	wg.Wait()
 }
 
-// Test for service status management REST API.
-func TestServiceStatusHandler(t *testing.T) {
-	testServicesCmdHandler(statusCmd, t)
-}
-
 // Test for service restart management REST API.
 func TestServiceRestartHandler(t *testing.T) {
 	testServicesCmdHandler(restartCmd, t)

cmd/admin-router.go

@@ -42,8 +42,10 @@ func registerAdminRouter(router *mux.Router, enableConfigOps, enableIAMOps bool)
 
 	/// Service operations
 
-	// Get status, update, restart and stop MinIO service.
+	// Restart and stop MinIO service.
 	adminV1Router.Methods(http.MethodPost).Path("/service").HandlerFunc(httpTraceAll(adminAPI.ServiceActionHandler)).Queries("action", "{action:.*}")
+	// Update MinIO servers.
+	adminV1Router.Methods(http.MethodPost).Path("/update").HandlerFunc(httpTraceAll(adminAPI.ServerUpdateHandler)).Queries("updateURL", "{updateURL:.*}")
 
 	// Info operations
 	adminV1Router.Methods(http.MethodGet).Path("/info").HandlerFunc(httpTraceAll(adminAPI.ServerInfoHandler))

cmd/common-main.go

@@ -67,7 +67,7 @@ func checkUpdate(mode string) {
 		if globalInplaceUpdateDisabled {
 			logger.StartupMessage(updateMsg)
 		} else {
-			logger.StartupMessage(prepareUpdateMessage("Run `minio update`", latestReleaseTime.Sub(currentReleaseTime)))
+			logger.StartupMessage(prepareUpdateMessage("Run `mc admin update`", latestReleaseTime.Sub(currentReleaseTime)))
 		}
 	}
 }

cmd/notification.go

@@ -405,6 +405,21 @@ func (sys *NotificationSys) DownloadProfilingData(ctx context.Context, writer io
 	return profilingDataFound
 }
 
+// ServerUpdate - updates remote peers.
+func (sys *NotificationSys) ServerUpdate(updateURL, sha256Hex string, latestReleaseTime time.Time) []NotificationPeerErr {
+	ng := WithNPeers(len(sys.peerClients))
+	for idx, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
+		client := client
+		ng.Go(context.Background(), func() error {
+			return client.ServerUpdate(updateURL, sha256Hex, latestReleaseTime)
+		}, idx, *client.host)
+	}
+	return ng.Wait()
+}
+
 // SignalService - calls signal service RPC call on all peers.
 func (sys *NotificationSys) SignalService(sig serviceSignal) []NotificationPeerErr {
 	ng := WithNPeers(len(sys.peerClients))

cmd/peer-rest-client.go

@@ -503,6 +503,24 @@ func (client *peerRESTClient) LoadGroup(group string) error {
 	return nil
 }
 
+// ServerUpdate - sends server update message to remote peers.
+func (client *peerRESTClient) ServerUpdate(updateURL, sha256Hex string, latestReleaseTime time.Time) error {
+	values := make(url.Values)
+	values.Set(peerRESTUpdateURL, updateURL)
+	values.Set(peerRESTSha256Hex, sha256Hex)
+	if !latestReleaseTime.IsZero() {
+		values.Set(peerRESTLatestRelease, latestReleaseTime.Format(time.RFC3339))
+	} else {
+		values.Set(peerRESTLatestRelease, "")
+	}
+	respBody, err := client.call(peerRESTMethodServerUpdate, values, nil, -1)
+	if err != nil {
+		return err
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
 // SignalService - sends signal to peer nodes.
 func (client *peerRESTClient) SignalService(sig serviceSignal) error {
 	values := make(url.Values)

cmd/peer-rest-common.go

@@ -27,6 +27,7 @@ const (
 	peerRESTMethodMemUsageInfo             = "memusageinfo"
 	peerRESTMethodDrivePerfInfo            = "driveperfinfo"
 	peerRESTMethodDeleteBucket             = "deletebucket"
+	peerRESTMethodServerUpdate             = "serverupdate"
 	peerRESTMethodSignalService            = "signalservice"
 	peerRESTMethodBackgroundHealStatus     = "backgroundhealstatus"
 	peerRESTMethodBackgroundOpsStatus      = "backgroundopsstatus"
@@ -53,17 +54,20 @@ const (
 )
 
 const (
-	peerRESTNetPerfSize = "netperfsize"
-	peerRESTBucket      = "bucket"
-	peerRESTUser        = "user"
-	peerRESTGroup       = "group"
-	peerRESTUserTemp    = "user-temp"
-	peerRESTPolicy      = "policy"
-	peerRESTUserOrGroup = "user-or-group"
-	peerRESTIsGroup     = "is-group"
-	peerRESTSignal      = "signal"
-	peerRESTProfiler    = "profiler"
-	peerRESTDryRun      = "dry-run"
-	peerRESTTraceAll    = "all"
-	peerRESTTraceErr    = "err"
+	peerRESTNetPerfSize   = "netperfsize"
+	peerRESTBucket        = "bucket"
+	peerRESTUser          = "user"
+	peerRESTGroup         = "group"
+	peerRESTUserTemp      = "user-temp"
+	peerRESTPolicy        = "policy"
+	peerRESTUserOrGroup   = "user-or-group"
+	peerRESTIsGroup       = "is-group"
+	peerRESTUpdateURL     = "updateURL"
+	peerRESTSha256Hex     = "sha256Hex"
+	peerRESTLatestRelease = "latestReleaseTime"
+	peerRESTSignal        = "signal"
+	peerRESTProfiler      = "profiler"
+	peerRESTDryRun        = "dry-run"
+	peerRESTTraceAll      = "all"
+	peerRESTTraceErr      = "err"
 )

cmd/peer-rest-server.go

@@ -24,7 +24,6 @@ import (
 	"io"
 	"io/ioutil"
 	"net/http"
-	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -67,46 +66,6 @@ func getServerInfo() (*ServerInfoData, error) {
 	}, nil
 }
 
-// uptimes - used to sort uptimes in chronological order.
-type uptimes []time.Duration
-
-func (ts uptimes) Len() int {
-	return len(ts)
-}
-
-func (ts uptimes) Less(i, j int) bool {
-	return ts[i] < ts[j]
-}
-
-func (ts uptimes) Swap(i, j int) {
-	ts[i], ts[j] = ts[j], ts[i]
-}
-
-// getPeerUptimes - returns the uptime.
-func getPeerUptimes(serverInfo []ServerInfo) time.Duration {
-	// In a single node Erasure or FS backend setup the uptime of
-	// the setup is the uptime of the single minio server
-	// instance.
-	if !globalIsDistXL {
-		return UTCNow().Sub(globalBootTime)
-	}
-
-	var times []time.Duration
-
-	for _, info := range serverInfo {
-		if info.Error != "" {
-			continue
-		}
-		times = append(times, info.Data.Properties.Uptime)
-	}
-
-	// Sort uptimes in chronological order.
-	sort.Sort(uptimes(times))
-
-	// Return the latest time as the uptime.
-	return times[0]
-}
-
 // NetReadPerfInfoHandler - returns network read performance information.
 func (s *peerRESTServer) NetReadPerfInfoHandler(w http.ResponseWriter, r *http.Request) {
 	if !s.IsValid(w, r) {
@@ -809,6 +768,35 @@ func (s *peerRESTServer) ListenBucketNotificationHandler(w http.ResponseWriter,
 	w.(http.Flusher).Flush()
 }
 
+// ServerUpdateHandler - updates the current server.
+func (s *peerRESTServer) ServerUpdateHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	updateURL := vars[peerRESTUpdateURL]
+	sha256Hex := vars[peerRESTSha256Hex]
+	var latestReleaseTime time.Time
+	var err error
+	if latestRelease := vars[peerRESTLatestRelease]; latestRelease != "" {
+		latestReleaseTime, err = time.Parse(latestRelease, time.RFC3339)
+		if err != nil {
+			s.writeErrorResponse(w, err)
+			return
+		}
+	}
+	us, err := updateServer(updateURL, sha256Hex, latestReleaseTime)
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+	if us.CurrentVersion != us.UpdatedVersion {
+		globalServiceSignalCh <- serviceRestart
+	}
+}
+
 var errUnsupportedSignal = fmt.Errorf("unsupported signal: only restart and stop signals are supported")
 
 // SignalServiceHandler - signal service handler.
@@ -831,22 +819,10 @@ func (s *peerRESTServer) SignalServiceHandler(w http.ResponseWriter, r *http.Req
 	}
 	signal := serviceSignal(si)
 	defer w.(http.Flusher).Flush()
-	switch {
-	case signal&serviceUpdate == serviceUpdate:
-		us, err := updateServer()
-		if err != nil {
-			s.writeErrorResponse(w, err)
-			return
-		}
-		// We didn't upgrade, no need to restart
-		// the services.
-		if us.CurrentVersion == us.UpdatedVersion {
-			return
-		}
-		fallthrough
-	case signal&serviceRestart == serviceRestart:
-		fallthrough
-	case signal&serviceStop == serviceStop:
+	switch signal {
+	case serviceRestart:
+		globalServiceSignalCh <- signal
+	case serviceStop:
 		globalServiceSignalCh <- signal
 	default:
 		s.writeErrorResponse(w, errUnsupportedSignal)
@@ -954,6 +930,7 @@ func registerPeerRESTHandlers(router *mux.Router) {
 	subrouter.Methods(http.MethodPost).Path(SlashSeparator + peerRESTMethodDrivePerfInfo).HandlerFunc(httpTraceHdrs(server.DrivePerfInfoHandler))
 	subrouter.Methods(http.MethodPost).Path(SlashSeparator + peerRESTMethodDeleteBucket).HandlerFunc(httpTraceHdrs(server.DeleteBucketHandler)).Queries(restQueries(peerRESTBucket)...)
 	subrouter.Methods(http.MethodPost).Path(SlashSeparator + peerRESTMethodSignalService).HandlerFunc(httpTraceHdrs(server.SignalServiceHandler)).Queries(restQueries(peerRESTSignal)...)
+	subrouter.Methods(http.MethodPost).Path(SlashSeparator + peerRESTMethodServerUpdate).HandlerFunc(httpTraceHdrs(server.ServerUpdateHandler)).Queries(restQueries(peerRESTUpdateURL, peerRESTSha256Hex, peerRESTLatestRelease)...)
 
 	subrouter.Methods(http.MethodPost).Path(SlashSeparator + peerRESTMethodBucketPolicyRemove).HandlerFunc(httpTraceAll(server.RemoveBucketPolicyHandler)).Queries(restQueries(peerRESTBucket)...)
 	subrouter.Methods(http.MethodPost).Path(SlashSeparator + peerRESTMethodBucketPolicySet).HandlerFunc(httpTraceHdrs(server.SetBucketPolicyHandler)).Queries(restQueries(peerRESTBucket)...)

cmd/service.go

@@ -26,10 +26,8 @@ import (
 type serviceSignal int
 
 const (
-	serviceStatus  serviceSignal = iota // Gets status about the service.
-	serviceRestart                      // Restarts the service.
+	serviceRestart serviceSignal = iota // Restarts the server.
 	serviceStop                         // Stops the server.
-	serviceUpdate                       // Updates the server.
 	// Add new service requests here.
 )
 

cmd/signals.go

@@ -77,14 +77,14 @@ func handleSignals() {
 			logger.Info("Exiting on signal: %s", strings.ToUpper(osSignal.String()))
 			exit(stopProcess())
 		case signal := <-globalServiceSignalCh:
-			switch {
-			case signal&serviceRestart == serviceRestart:
+			switch signal {
+			case serviceRestart:
 				logger.Info("Restarting on service signal")
 				stop := stopProcess()
 				rerr := restartProcess()
 				logger.LogIf(context.Background(), rerr)
 				exit(stop && rerr == nil)
-			case signal&serviceStop == serviceStop:
+			case serviceStop:
 				logger.Info("Stopping on service signal")
 				exit(stopProcess())
 			}

cmd/update.go

@@ -77,11 +77,14 @@ func releaseTimeToReleaseTag(releaseTime time.Time) string {
 
 // releaseTagToReleaseTime - reverse of `releaseTimeToReleaseTag()`
 func releaseTagToReleaseTime(releaseTag string) (releaseTime time.Time, err error) {
-	tagTimePart := strings.TrimPrefix(releaseTag, "RELEASE.")
-	if tagTimePart == releaseTag {
+	fields := strings.Split(releaseTag, ".")
+	if len(fields) < 2 || len(fields) > 3 {
 		return releaseTime, fmt.Errorf("%s is not a valid release tag", releaseTag)
 	}
-	return time.Parse(minioReleaseTagTimeLayout, tagTimePart)
+	if fields[0] != "RELEASE" {
+		return releaseTime, fmt.Errorf("%s is not a valid release tag", releaseTag)
+	}
+	return time.Parse(minioReleaseTagTimeLayout, fields[1])
 }
 
 // getModTime - get the file modification time of `path`
@@ -343,10 +346,20 @@ func DownloadReleaseData(timeout time.Duration, mode string) (data string, err e
 //
 // The expected format is a single line with two words like:
 //
-// fbe246edbd382902db9a4035df7dce8cb441357d minio.RELEASE.2016-10-07T01-16-39Z
+// fbe246edbd382902db9a4035df7dce8cb441357d minio.RELEASE.2016-10-07T01-16-39Z.<hotfix_optional>
 //
 // The second word must be `minio.` appended to a standard release tag.
 func parseReleaseData(data string) (sha256Hex string, releaseTime time.Time, err error) {
+	defer func() {
+		if err != nil {
+			err = AdminError{
+				Code:       AdminUpdateUnexpectedFailure,
+				Message:    err.Error(),
+				StatusCode: http.StatusInternalServerError,
+			}
+		}
+	}()
+
 	fields := strings.Fields(data)
 	if len(fields) != 2 {
 		err = fmt.Errorf("Unknown release data `%s`", data)
@@ -356,17 +369,18 @@ func parseReleaseData(data string) (sha256Hex string, releaseTime time.Time, err
 	sha256Hex = fields[0]
 	releaseInfo := fields[1]
 
-	fields = strings.SplitN(releaseInfo, ".", 2)
-	if len(fields) != 2 {
+	// Split release of style minio.RELEASE.2019-08-21T19-40-07Z.<hotfix>
+	nfields := strings.SplitN(releaseInfo, ".", 2)
+	if len(nfields) != 2 {
 		err = fmt.Errorf("Unknown release information `%s`", releaseInfo)
 		return sha256Hex, releaseTime, err
 	}
-	if fields[0] != "minio" {
+	if nfields[0] != "minio" {
 		err = fmt.Errorf("Unknown release `%s`", releaseInfo)
 		return sha256Hex, releaseTime, err
 	}
 
-	releaseTime, err = releaseTagToReleaseTime(fields[1])
+	releaseTime, err = releaseTagToReleaseTime(nfields[1])
 	if err != nil {
 		err = fmt.Errorf("Unknown release tag format. %s", err)
 	}
@@ -460,15 +474,19 @@ func getUpdateInfo(timeout time.Duration, mode string) (updateMsg string, sha256
 	return prepareUpdateMessage(downloadURL, older), sha256Hex, currentReleaseTime, latestReleaseTime, nil
 }
 
-func doUpdate(sha256Hex string, mode string, latestReleaseTime time.Time, ok bool) (err error) {
+func doUpdate(updateURL, sha256Hex, mode string) (err error) {
 	var sha256Sum []byte
 	sha256Sum, err = hex.DecodeString(sha256Hex)
 	if err != nil {
-		return err
+		return AdminError{
+			Code:       AdminUpdateUnexpectedFailure,
+			Message:    err.Error(),
+			StatusCode: http.StatusInternalServerError,
+		}
 	}
 
 	clnt := &http.Client{Transport: getUpdateTransport(30 * time.Second)}
-	req, err := http.NewRequest(http.MethodGet, getDownloadURL(releaseTimeToReleaseTag(latestReleaseTime)), nil)
+	req, err := http.NewRequest(http.MethodGet, updateURL, nil)
 	if err != nil {
 		return AdminError{
 			Code:       AdminUpdateUnexpectedFailure,

cmd/update_test.go

@@ -285,6 +285,7 @@ func TestParseReleaseData(t *testing.T) {
 		{"more minio.RELEASE.fields", time.Time{}, "", fmt.Errorf(`Unknown release tag format. parsing time "fields" as "2006-01-02T15-04-05Z": cannot parse "fields" as "2006"`)},
 		{"more minio.RELEASE.2016-10-07T01-16-39Z", releaseTime, "more", nil},
 		{"fbe246edbd382902db9a4035df7dce8cb441357d minio.RELEASE.2016-10-07T01-16-39Z\n", releaseTime, "fbe246edbd382902db9a4035df7dce8cb441357d", nil},
+		{"fbe246edbd382902db9a4035df7dce8cb441357d minio.RELEASE.2016-10-07T01-16-39Z.customer-hotfix\n", releaseTime, "fbe246edbd382902db9a4035df7dce8cb441357d", nil},
 	}
 
 	for i, testCase := range testCases {