Add log file close and reopen on receipt of SIGUSR1

server/server.go

@@ -15,7 +15,6 @@ import (
 	"regexp"
 	"sort"
 	"sync"
-	"syscall"
 	"time"
 
 	"github.com/containous/mux"
@@ -78,7 +77,7 @@ func NewServer(globalConfiguration GlobalConfiguration) *Server {
 	server.signals = make(chan os.Signal, 1)
 	server.stopChan = make(chan bool, 1)
 	server.providers = []provider.Provider{}
-	signal.Notify(server.signals, syscall.SIGINT, syscall.SIGTERM)
+	server.configureSignals()
 	currentConfigurations := make(configs)
 	server.currentConfigurations.Set(currentConfigurations)
 	server.globalConfiguration = globalConfiguration
@@ -426,13 +425,6 @@ func (server *Server) startProviders() {
 	}
 }
 
-func (server *Server) listenSignals() {
-	sig := <-server.signals
-	log.Infof("I have to go... %+v", sig)
-	log.Info("Stopping server")
-	server.Stop()
-}
-
 func createClientTLSConfig(tlsOption *TLS) (*tls.Config, error) {
 	if tlsOption == nil {
 		return nil, errors.New("no TLS provided")

server/server_signals.go

@@ -0,0 +1,38 @@
+// +build !windows
+
+package server
+
+import (
+	"os/signal"
+	"syscall"
+
+	"github.com/containous/traefik/log"
+)
+
+func (server *Server) configureSignals() {
+	signal.Notify(server.signals, syscall.SIGINT, syscall.SIGTERM, syscall.SIGUSR1)
+}
+
+func (server *Server) listenSignals() {
+	for {
+		sig := <-server.signals
+		switch sig {
+		case syscall.SIGUSR1:
+			log.Infof("Closing and re-opening log files for rotation: %+v", sig)
+
+			if server.accessLoggerMiddleware != nil {
+				if err := server.accessLoggerMiddleware.Rotate(); err != nil {
+					log.Errorf("Error rotating access log: %s", err)
+				}
+			}
+
+			if err := log.RotateFile(); err != nil {
+				log.Errorf("Error rotating error log: %s", err)
+			}
+		default:
+			log.Infof("I have to go... %+v", sig)
+			log.Info("Stopping server")
+			server.Stop()
+		}
+	}
+}

server/server_signals_windows.go

@@ -0,0 +1,26 @@
+// +build windows
+
+package server
+
+import (
+	"os/signal"
+	"syscall"
+
+	"github.com/containous/traefik/log"
+)
+
+func (server *Server) configureSignals() {
+	signal.Notify(server.signals, syscall.SIGINT, syscall.SIGTERM)
+}
+
+func (server *Server) listenSignals() {
+	for {
+		sig := <-server.signals
+		switch sig {
+		default:
+			log.Infof("I have to go... %+v", sig)
+			log.Info("Stopping server")
+			server.Stop()
+		}
+	}
+}