add configurable VRF interface and user-timeout (#17108)

cmd/server-main.go

@@ -107,6 +107,19 @@ var ServerFlags = []cli.Flag{
 		Value:  10 * time.Minute,
 		EnvVar: "MINIO_CONN_WRITE_DEADLINE",
 	},
+	cli.DurationFlag{
+		Name:   "conn-user-timeout",
+		Usage:  "custom TCP_USER_TIMEOUT for socket buffers",
+		Hidden: true,
+		Value:  10 * time.Minute,
+		EnvVar: "MINIO_CONN_USER_TIMEOUT",
+	},
+	cli.StringFlag{
+		Name:   "interface",
+		Usage:  "bind to right VRF device for MinIO services",
+		Hidden: true,
+		EnvVar: "MINIO_INTERFACE",
+	},
 	cli.StringSliceFlag{
 		Name:  "ftp",
 		Usage: "enable and configure an FTP(Secure) server",
@@ -264,11 +277,16 @@ func serverHandleCmdArgs(ctx *cli.Context) {
 		},
 	})
 
+	globalTCPOptions = xhttp.TCPOptions{
+		UserTimeout: int(ctx.Duration("conn-user-timeout").Milliseconds()),
+		Interface:   ctx.String("interface"),
+	}
+
 	// On macOS, if a process already listens on LOCALIPADDR:PORT, net.Listen() falls back
 	// to IPv6 address ie minio will start listening on IPv6 address whereas another
 	// (non-)minio process is listening on IPv4 of given port.
 	// To avoid this error situation we check for port availability.
-	logger.FatalIf(checkPortAvailability(globalMinioHost, globalMinioPort), "Unable to start the server")
+	logger.FatalIf(xhttp.CheckPortAvailability(globalMinioHost, globalMinioPort, globalTCPOptions), "Unable to start the server")
 
 	globalIsErasure = (setupType == ErasureSetupType)
 	globalIsDistErasure = (setupType == DistErasureSetupType)
@@ -570,7 +588,8 @@ func serverMain(ctx *cli.Context) {
 		UseIdleTimeout(ctx.Duration("idle-timeout")).
 		UseReadHeaderTimeout(ctx.Duration("read-header-timeout")).
 		UseBaseContext(GlobalContext).
-		UseCustomLogger(log.New(io.Discard, "", 0)) // Turn-off random logging by Go stdlib
+		UseCustomLogger(log.New(io.Discard, "", 0)). // Turn-off random logging by Go stdlib
+		UseTCPOptions(globalTCPOptions)
 
 	go func() {
 		globalHTTPServerErrorCh <- httpServer.Start(GlobalContext)