Add gRPC servers to ncm service

Add a contextupdate grpc server to the ncm service.

Issue-ID: MULTICLOUD-1029
Signed-off-by: Eric Multanen <eric.w.multanen@intel.com>
Change-Id: I38caa625c028baac06a6202f03b86d0f2bf38126

1 files changed, 58 insertions, 1 deletions

diff --git a/src/ncm/cmd/main.go b/src/ncm/cmd/main.go
index c4ae423f..49af81ee 100644
--- a/src/ncm/cmd/main.go
+++ b/src/ncm/cmd/main.go
@@ -15,23 +15,73 @@ package main
 
 import (
 	"context"
+	"fmt"
 	"log"
 	"math/rand"
+	"net"
 	"net/http"
 	"os"
 	"os/signal"
+	"strings"
 	"time"
 
 	"github.com/gorilla/handlers"
 	"github.com/onap/multicloud-k8s/src/ncm/api"
+	register "github.com/onap/multicloud-k8s/src/ncm/pkg/grpc"
+	"github.com/onap/multicloud-k8s/src/ncm/pkg/grpc/contextupdateserver"
+	updatepb "github.com/onap/multicloud-k8s/src/orchestrator/pkg/grpc/contextupdate"
 	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/auth"
 	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/config"
 	contextDb "github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/contextdb"
 	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/db"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/testdata"
 )
 
-func main() {
+func startGrpcServer() error {
+	var tls bool
+
+	if strings.Contains(config.GetConfiguration().GrpcEnableTLS, "enable") {
+		tls = true
+	} else {
+		tls = false
+	}
+	certFile := config.GetConfiguration().GrpcServerCert
+	keyFile := config.GetConfiguration().GrpcServerKey
+
+	host, port := register.GetServerHostPort()
+
+	lis, err := net.Listen("tcp", fmt.Sprintf("%s:%d", host, port))
+	if err != nil {
+		log.Fatalf("Could not listen to port: %v", err)
+	}
+	var opts []grpc.ServerOption
+	if tls {
+		if certFile == "" {
+			certFile = testdata.Path("server.pem")
+		}
+		if keyFile == "" {
+			keyFile = testdata.Path("server.key")
+		}
+		creds, err := credentials.NewServerTLSFromFile(certFile, keyFile)
+		if err != nil {
+			log.Fatalf("Could not generate credentials %v", err)
+		}
+		opts = []grpc.ServerOption{grpc.Creds(creds)}
+	}
+	grpcServer := grpc.NewServer(opts...)
+	updatepb.RegisterContextupdateServer(grpcServer, contextupdateserver.NewContextupdateServer())
 
+	log.Println("Starting Network Configuration Manager gRPC Server")
+	err = grpcServer.Serve(lis)
+	if err != nil {
+		log.Fatalf("ncm grpc server is not serving %v", err)
+	}
+	return err
+}
+
+func main() {
 	rand.Seed(time.Now().UnixNano())
 
 	err := db.InitializeDatabaseConnection("mco")
@@ -56,6 +106,13 @@ func main() {
 		Addr:    ":" + config.GetConfiguration().ServicePort,
 	}
 
+	go func() {
+		err := startGrpcServer()
+		if err != nil {
+			log.Fatalf("GRPC server failed to start")
+		}
+	}()
+
 	connectionsClose := make(chan struct{})
 	go func() {
 		c := make(chan os.Signal, 1)