Create log folder if not present

cmd/traefik/traefik.go

@@ -7,6 +7,7 @@ import (
 	fmtlog "log"
 	"net/http"
 	"os"
+	"path/filepath"
 	"reflect"
 	"runtime"
 	"strings"
@@ -206,6 +207,13 @@ func run(traefikConfiguration *server.TraefikConfiguration) {
 	}
 	log.SetLevel(level)
 	if len(globalConfiguration.TraefikLogsFile) > 0 {
+		dir := filepath.Dir(globalConfiguration.TraefikLogsFile)
+
+		err := os.MkdirAll(dir, 0755)
+		if err != nil {
+			log.Errorf("Failed to create log path %s: %s", dir, err)
+		}
+
 		fi, err := os.OpenFile(globalConfiguration.TraefikLogsFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
 		defer func() {
 			if err := fi.Close(); err != nil {

middlewares/logger.go

@@ -7,6 +7,7 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"sync/atomic"
@@ -54,6 +55,13 @@ type logInfoResponseWriter struct {
 // NewLogger returns a new Logger instance.
 func NewLogger(file string) *Logger {
 	if len(file) > 0 {
+		dir := filepath.Dir(file)
+
+		err := os.MkdirAll(dir, 0755)
+		if err != nil {
+			log.Errorf("Failed to create log path %s: %s", dir, err)
+		}
+
 		fi, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
 		if err != nil {
 			log.Error("Error opening file", err)

middlewares/logger_test.go

@@ -7,7 +7,6 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
-	"runtime"
 	"testing"
 
 	shellwords "github.com/mattn/go-shellwords"
@@ -18,8 +17,7 @@ type logtestResponseWriter struct{}
 
 var (
 	logger                  *Logger
-	logfileName             = "traefikTestLogger.log"
-	logfilePath             string
+	logfileNameSuffix       = "/traefik/logger/test.log"
 	helloWorld              = "Hello, World"
 	testBackendName         = "http://127.0.0.1/testBackend"
 	testFrontendName        = "testFrontend"
@@ -39,14 +37,21 @@ var (
 )
 
 func TestLogger(t *testing.T) {
-	if runtime.GOOS == "windows" {
-		logfilePath = filepath.Join(os.Getenv("TEMP"), logfileName)
-	} else {
-		logfilePath = filepath.Join("/tmp", logfileName)
+	tmp, err := ioutil.TempDir("", "testlogger")
+	if err != nil {
+		t.Fatalf("failed to create temp dir: %s", err)
 	}
+	defer os.RemoveAll(tmp)
+
+	logfilePath := filepath.Join(tmp, logfileNameSuffix)
 
 	logger = NewLogger(logfilePath)
-	defer cleanup()
+	defer logger.Close()
+
+	if _, err := os.Stat(logfilePath); os.IsNotExist(err) {
+		t.Fatalf("logger should create %s", logfilePath)
+	}
+
 	SetBackend2FrontendMap(&testBackend2FrontendMap)
 
 	r := &http.Request{
@@ -86,11 +91,6 @@ func TestLogger(t *testing.T) {
 	}
 }
 
-func cleanup() {
-	logger.Close()
-	os.Remove(logfilePath)
-}
-
 func printLogdata(logdata []byte) string {
 	return fmt.Sprintf(
 		"\nExpected: %s\n"+