fix epm listen address and configuration file

epm/cmd/epm/app/server.go

@@ -6,6 +6,8 @@ import (
 	"net"
 	"time"
 
+	"github.com/golang/glog"
+
 	"github.com/alibaba/inclavare-containers/epm/cmd/epm/app/options"
 	"github.com/alibaba/inclavare-containers/epm/config"
 	"github.com/alibaba/inclavare-containers/epm/pkg/epm"
@@ -16,7 +18,7 @@ import (
 	"google.golang.org/grpc"
 )
 
-func runServer(opts *options.Options) error {
+func runServer(opts *options.Options, stopCh <-chan struct{}) error {
 	var err error
 	var cfg config.Config
 
@@ -36,11 +38,11 @@ func runServer(opts *options.Options) error {
 		serverOpts = append(serverOpts, grpc.MaxSendMsgSize(cfg.GRPC.MaxSendMsgSize))
 	}
 	metadata, err := cache_metadata.NewMetadataServer(cfg.DBPath, time.Second*time.Duration(cfg.DBTimeout))
-	defer metadata.Close()
 
 	if err != nil {
 		return fmt.Errorf("create metadata server failed. %++v", err)
 	}
+	defer metadata.Close()
 
 	server := epm.EnclavePoolManagerServer{}
 
@@ -58,12 +60,14 @@ func runServer(opts *options.Options) error {
 	// registry and start the cache pool manager server
 	v1alpha1.RegisterEnclavePoolManagerServer(s, &server)
 	// listen and serve
-	lis, err := net.Listen("udp", cfg.GRPC.Address)
+	lis, err := net.Listen("unix", cfg.GRPC.Address)
 	if err != nil {
 		log.Fatalf("failed to listen: %v", err)
 	}
+	glog.Info("start the and epm server...")
 	if err := s.Serve(lis); err != nil {
-		log.Fatalf("failed to start cache pool manager server: %v", err)
+		log.Fatalf("failed to start epm server: %v", err)
 	}
+	<-stopCh
 	return nil
 }

epm/cmd/epm/app/start.go

@@ -6,13 +6,13 @@ import (
 )
 
 // NewEnclavePoolManagerServer creat and start the enclave pool manager server
-func NewEnclavePoolManagerServer() *cobra.Command {
+func NewEnclavePoolManagerServer(stopCh <-chan struct{}) *cobra.Command {
 	opts := &options.Options{}
 	cmd := &cobra.Command{
 		Short: "Launch signature server",
 		Long:  "Launch signature server",
 		RunE: func(cmd *cobra.Command, args []string) error {
-			return runServer(opts)
+			return runServer(opts, stopCh)
 		},
 	}
 	flags := cmd.Flags()

epm/cmd/epm/main.go

@@ -3,24 +3,42 @@ package main
 import (
 	"flag"
 	"os"
+	"os/signal"
 	"runtime"
+	"syscall"
 
 	"github.com/alibaba/inclavare-containers/epm/cmd/epm/app"
 	"github.com/golang/glog"
 )
 
+var onlyOneSignalHandler = make(chan struct{})
+var shutdownSignals = []os.Signal{os.Interrupt, syscall.SIGTERM}
+
+func setupSignalHandler() <-chan struct{} {
+	close(onlyOneSignalHandler) // panics when called twice
+
+	stop := make(chan struct{})
+	c := make(chan os.Signal, 2)
+	signal.Notify(c, shutdownSignals...)
+	go func() {
+		<-c
+		close(stop)
+		<-c
+		os.Exit(1) // second signal. Exit directly.
+	}()
+
+	return stop
+}
+
 func main() {
+
 	if len(os.Getenv("GOMAXPROCS")) == 0 {
 		runtime.GOMAXPROCS(runtime.NumCPU())
 	}
-
-	cmd := app.NewEnclavePoolManagerServer()
+	stopCh := setupSignalHandler()
+	cmd := app.NewEnclavePoolManagerServer(stopCh)
 	cmd.Flags().AddGoFlagSet(flag.CommandLine)
 
-	if err := cmd.Execute(); err != nil {
-		glog.Fatal(err)
-	}
-
 	flag.CommandLine.Parse([]string{})
 	if err := cmd.Execute(); err != nil {
 		glog.Fatal(err)

epm/conf/config.toml

@@ -3,7 +3,7 @@ db_path = "/var/local/epm/epm.db"
 db_timeout = 10
 
 [grpc]
-  address = "/var/run/containerd/containerd.sock"
+  address = "/var/run/epm.sock"
   uid = 0
   gid = 0
   max_recv_message_size = 16777216