Disable printing access/secrets in systemd (#6621)

Minio when run as a service in `systemd` should
avoid printing access/secret keys.

cmd/gateway-startup-msg.go

@@ -57,8 +57,10 @@ func printGatewayCommonMsg(apiEndpoints []string) {
 	apiEndpointStr := strings.Join(apiEndpoints, "  ")
 	// Colorize the message and print.
 	logger.StartupMessage(colorBlue("\nEndpoint: ") + colorBold(fmt.Sprintf(getFormatStr(len(apiEndpointStr), 1), apiEndpointStr)))
+	if isTerminal() {
 		logger.StartupMessage(colorBlue("AccessKey: ") + colorBold(fmt.Sprintf("%s ", cred.AccessKey)))
 		logger.StartupMessage(colorBlue("SecretKey: ") + colorBold(fmt.Sprintf("%s ", cred.SecretKey)))
+	}
 
 	if globalIsBrowserEnabled {
 		logger.StartupMessage(colorBlue("\nBrowser Access:"))

cmd/server-startup-msg.go

@@ -116,11 +116,13 @@ func printServerCommonMsg(apiEndpoints []string) {
 
 	// Colorize the message and print.
 	logger.StartupMessage(colorBlue("Endpoint: ") + colorBold(fmt.Sprintf(getFormatStr(len(apiEndpointStr), 1), apiEndpointStr)))
+	if isTerminal() {
 		logger.StartupMessage(colorBlue("AccessKey: ") + colorBold(fmt.Sprintf("%s ", cred.AccessKey)))
 		logger.StartupMessage(colorBlue("SecretKey: ") + colorBold(fmt.Sprintf("%s ", cred.SecretKey)))
 		if region != "" {
 			logger.StartupMessage(colorBlue("Region: ") + colorBold(fmt.Sprintf(getFormatStr(len(region), 3), region)))
 		}
+	}
 	printEventNotifiers()
 
 	if globalIsBrowserEnabled {
@@ -151,6 +153,7 @@ func printCLIAccessMsg(endPoint string, alias string) {
 	cred := globalServerConfig.GetCredential()
 
 	// Configure 'mc', following block prints platform specific information for minio client.
+	if isTerminal() {
 		logger.StartupMessage(colorBlue("\nCommand-line Access: ") + mcQuickStartGuide)
 		if runtime.GOOS == globalWindowsOSName {
 			mcMessage := fmt.Sprintf("$ mc.exe config host add %s %s %s %s", alias, endPoint, cred.AccessKey, cred.SecretKey)
@@ -159,6 +162,7 @@ func printCLIAccessMsg(endPoint string, alias string) {
 			mcMessage := fmt.Sprintf("$ mc config host add %s %s %s %s", alias, endPoint, cred.AccessKey, cred.SecretKey)
 			logger.StartupMessage(fmt.Sprintf(getFormatStr(len(mcMessage), 3), mcMessage))
 		}
+	}
 }
 
 // Prints startup message for Object API acces, prints link to our SDK documentation.