feat: add daemon and connect is ok

pkg/daemon/client.go

@@ -0,0 +1,35 @@
+package daemon
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	log "github.com/sirupsen/logrus"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+	_ "google.golang.org/grpc/resolver/dns"
+	_ "google.golang.org/grpc/resolver/passthrough"
+
+	"github.com/wencaiwulue/kubevpn/pkg/config"
+	"github.com/wencaiwulue/kubevpn/pkg/daemon/rpc"
+)
+
+func GetClient(isSudo bool) rpc.DaemonClient {
+	name := "daemon"
+	if isSudo {
+		name = "sudo_daemon"
+	}
+	port, err2 := os.ReadFile(filepath.Join(config.DaemonPortPath, name))
+	if err2 != nil {
+		return nil
+	}
+	ctx := context.Background()
+	conn, err := grpc.DialContext(ctx, fmt.Sprintf("localhost:%s", string(port)), grpc.WithTransportCredentials(insecure.NewCredentials()))
+	if err != nil {
+		log.Errorf("cannot connect to server: %v", err)
+		return nil
+	}
+	return rpc.NewDaemonClient(conn)
+}