diff --git a/backend/apps/interfaces.go b/backend/apps/interfaces.go
index 8a96450e..dbdd24fd 100644
--- a/backend/apps/interfaces.go
+++ b/backend/apps/interfaces.go
@@ -9,8 +9,17 @@ type App interface {
 	Stop()
 }
 
-type MasterApp interface {
+type NodeApp interface {
 	App
 	interfaces.WithConfigPath
+	SetGrpcAddress(address interfaces.Address)
+}
+
+type MasterApp interface {
+	NodeApp
 	SetRunOnMaster(ok bool)
 }
+
+type WorkerApp interface {
+	NodeApp
+}
diff --git a/backend/apps/master.go b/backend/apps/master.go
index 8b222c6b..1fc86345 100644
--- a/backend/apps/master.go
+++ b/backend/apps/master.go
@@ -10,6 +10,7 @@ import (
 type Master struct {
 	// settings
 	runOnMaster bool
+	grpcAddress interfaces.Address
 
 	// dependencies
 	interfaces.WithConfigPath
@@ -22,6 +23,10 @@ type Master struct {
 	quit chan int
 }
 
+func (app *Master) SetGrpcAddress(address interfaces.Address) {
+	app.grpcAddress = address
+}
+
 func (app *Master) SetRunOnMaster(ok bool) {
 	app.runOnMaster = ok
 }
@@ -56,9 +61,15 @@ func NewMaster(opts ...MasterOption) (app MasterApp) {
 		opt(m)
 	}
 
+	// service options
+	var svcOpts []service.Option
+	if m.grpcAddress != nil {
+		svcOpts = append(svcOpts, service.WithAddress(m.grpcAddress))
+	}
+
 	// dependency injection
 	c := dig.New()
-	if err := c.Provide(service.ProvideMasterService(m.GetConfigPath())); err != nil {
+	if err := c.Provide(service.ProvideMasterService(m.GetConfigPath(), svcOpts...)); err != nil {
 		panic(err)
 	}
 	if err := c.Invoke(func(masterSvc interfaces.NodeMasterService) {
diff --git a/backend/apps/options.go b/backend/apps/options.go
index 80b5bdc1..70280058 100644
--- a/backend/apps/options.go
+++ b/backend/apps/options.go
@@ -1,15 +1,37 @@
 package apps
 
+import "github.com/crawlab-team/crawlab-core/interfaces"
+
 type MasterOption func(app MasterApp)
 
-func WithConfigPath(path string) MasterOption {
+func WithMasterConfigPath(path string) MasterOption {
 	return func(app MasterApp) {
 		app.SetConfigPath(path)
 	}
 }
 
+func WithMasterGrpcAddress(address interfaces.Address) MasterOption {
+	return func(app MasterApp) {
+		app.SetGrpcAddress(address)
+	}
+}
+
 func WithRunOnMaster(ok bool) MasterOption {
 	return func(app MasterApp) {
 		app.SetRunOnMaster(ok)
 	}
 }
+
+type WorkerOption func(app WorkerApp)
+
+func WithWorkerConfigPath(path string) WorkerOption {
+	return func(app WorkerApp) {
+		app.SetConfigPath(path)
+	}
+}
+
+func WithWorkerGrpcAddress(address interfaces.Address) WorkerOption {
+	return func(app WorkerApp) {
+		app.SetGrpcAddress(address)
+	}
+}
diff --git a/backend/apps/worker.go b/backend/apps/worker.go
index a3fe5d83..7d1200d7 100644
--- a/backend/apps/worker.go
+++ b/backend/apps/worker.go
@@ -1,16 +1,33 @@
 package apps
 
+import (
+	"github.com/crawlab-team/crawlab-core/config"
+	"github.com/crawlab-team/crawlab-core/interfaces"
+	"github.com/crawlab-team/crawlab-core/node/service"
+	"go.uber.org/dig"
+)
+
 type Worker struct {
-	handler *Handler
-	quit    chan int
+	// settings
+	grpcAddress interfaces.Address
+
+	// dependencies
+	interfaces.WithConfigPath
+	workerSvc interfaces.NodeWorkerService
+
+	// internals
+	quit chan int
+}
+
+func (app *Worker) SetGrpcAddress(address interfaces.Address) {
+	app.grpcAddress = address
 }
 
 func (app *Worker) Init() {
-	initApp("handler", app.handler) // handler
 }
 
 func (app *Worker) Start() {
-	go app.handler.Start()
+	go app.workerSvc.Start()
 }
 
 func (app *Worker) Wait() {
@@ -18,14 +35,37 @@ func (app *Worker) Wait() {
 }
 
 func (app *Worker) Stop() {
-	app.handler.Stop()
-
 	app.quit <- 1
 }
 
-func NewWorker() *Worker {
-	return &Worker{
-		handler: NewHandler(),
-		quit:    make(chan int, 1),
+func NewWorker(opts ...WorkerOption) (app *Worker) {
+	// worker
+	w := &Worker{
+		WithConfigPath: config.NewConfigPathService(),
+		quit:           make(chan int, 1),
 	}
+
+	// apply options
+	for _, opt := range opts {
+		opt(w)
+	}
+
+	// service options
+	var svcOpts []service.Option
+	if w.grpcAddress != nil {
+		svcOpts = append(svcOpts, service.WithAddress(w.grpcAddress))
+	}
+
+	// dependency injection
+	c := dig.New()
+	if err := c.Provide(service.ProvideWorkerService(w.GetConfigPath(), svcOpts...)); err != nil {
+		panic(err)
+	}
+	if err := c.Invoke(func(workerSvc interfaces.NodeWorkerService) {
+		w.workerSvc = workerSvc
+	}); err != nil {
+		panic(err)
+	}
+
+	return w
 }
diff --git a/backend/cmd/master.go b/backend/cmd/master.go
index 065d37b8..2e739d29 100644
--- a/backend/cmd/master.go
+++ b/backend/cmd/master.go
@@ -2,11 +2,26 @@ package cmd
 
 import (
 	"crawlab/apps"
+	"fmt"
+	"github.com/crawlab-team/crawlab-core/entity"
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var (
+	runOnMaster       bool
+	masterConfigPath  string
+	masterGrpcAddress string
 )
 
 func init() {
 	rootCmd.AddCommand(masterCmd)
+
+	masterCmd.PersistentFlags().StringVarP(&masterConfigPath, "config-path", "c", "", "Config path of master node")
+	_ = viper.BindPFlag("configPath", masterCmd.PersistentFlags().Lookup("configPath"))
+
+	masterCmd.PersistentFlags().StringVarP(&masterGrpcAddress, "grpc-address", "g", "", "gRPC address of master node")
+	_ = viper.BindPFlag("grpcAddress", masterCmd.PersistentFlags().Lookup("grpcAddress"))
 }
 
 var masterCmd = &cobra.Command{
@@ -16,9 +31,26 @@ var masterCmd = &cobra.Command{
 	Long: `Start a master instance of Crawlab 
 which runs api and assign tasks to worker nodes`,
 	Run: func(cmd *cobra.Command, args []string) {
-		master := apps.NewMaster(
-			apps.WithRunOnMaster(runOnMaster),
-		)
+		// options
+		var opts []apps.MasterOption
+		if masterConfigPath != "" {
+			opts = append(opts, apps.WithMasterConfigPath(masterConfigPath))
+			viper.Set("config.path", masterConfigPath)
+		}
+		opts = append(opts, apps.WithRunOnMaster(runOnMaster))
+		if masterGrpcAddress != "" {
+			address, err := entity.NewAddressFromString(masterGrpcAddress)
+			if err != nil {
+				fmt.Println(fmt.Sprintf("invalid grpc-address: %s", masterGrpcAddress))
+			}
+			opts = append(opts, apps.WithMasterGrpcAddress(address))
+			viper.Set("grpc.client.address", masterGrpcAddress)
+		}
+
+		// app
+		master := apps.NewMaster(opts...)
+
+		// start
 		apps.Start(master)
 	},
 }
diff --git a/backend/cmd/root.go b/backend/cmd/root.go
index aa53dc1b..067d4d74 100644
--- a/backend/cmd/root.go
+++ b/backend/cmd/root.go
@@ -10,8 +10,7 @@ import (
 
 var (
 	// Used for flags.
-	cfgFile     string
-	runOnMaster bool
+	cfgFile string
 
 	rootCmd = &cobra.Command{
 		Use:   "crawlab",
@@ -30,9 +29,6 @@ func Execute() error {
 
 func init() {
 	cobra.OnInitialize(initConfig)
-
-	rootCmd.PersistentFlags().BoolVar(&runOnMaster, "runOnMaster", false, "Whether to run tasks on master node (default: false)")
-	_ = viper.BindPFlag("runOnMaster", rootCmd.PersistentFlags().Lookup("runOnMaster"))
 }
 
 func initConfig() {
diff --git a/backend/cmd/worker.go b/backend/cmd/worker.go
index 30e85566..93a6ca1d 100644
--- a/backend/cmd/worker.go
+++ b/backend/cmd/worker.go
@@ -2,11 +2,25 @@ package cmd
 
 import (
 	"crawlab/apps"
+	"fmt"
+	"github.com/crawlab-team/crawlab-core/entity"
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var (
+	workerConfigPath  string
+	workerGrpcAddress string
 )
 
 func init() {
 	rootCmd.AddCommand(workerCmd)
+
+	workerCmd.PersistentFlags().StringVarP(&workerConfigPath, "config-path", "c", "", "Config path of worker node")
+	_ = viper.BindPFlag("configPath", workerCmd.PersistentFlags().Lookup("configPath"))
+
+	workerCmd.PersistentFlags().StringVarP(&workerGrpcAddress, "grpc-address", "g", "", "gRPC address of worker node")
+	_ = viper.BindPFlag("grpcAddress", workerCmd.PersistentFlags().Lookup("grpcAddress"))
 }
 
 var workerCmd = &cobra.Command{
@@ -17,7 +31,26 @@ var workerCmd = &cobra.Command{
 serving in the worker node and executes tasks
 assigned by the master node`,
 	Run: func(cmd *cobra.Command, args []string) {
-		worker := apps.NewWorker()
-		apps.Start(worker)
+		// options
+		var opts []apps.WorkerOption
+		if workerConfigPath != "" {
+			opts = append(opts, apps.WithWorkerConfigPath(workerConfigPath))
+			viper.Set("config.path", workerConfigPath)
+		}
+		if workerGrpcAddress != "" {
+			address, err := entity.NewAddressFromString(workerGrpcAddress)
+			if err != nil {
+				fmt.Println(fmt.Sprintf("invalid grpc-address: %s", workerGrpcAddress))
+				return
+			}
+			opts = append(opts, apps.WithWorkerGrpcAddress(address))
+			viper.Set("grpc.client.address", workerGrpcAddress)
+		}
+
+		// app
+		master := apps.NewWorker(opts...)
+
+		// start
+		apps.Start(master)
 	},
 }
diff --git a/backend/conf/config.yml b/backend/conf/config.yml
index 8f69d28f..302fe70f 100644
--- a/backend/conf/config.yml
+++ b/backend/conf/config.yml
@@ -61,4 +61,10 @@ notification:
     senderIdentity: ''
     smtp:
       user: ''
-      password: ''
\ No newline at end of file
+      password: ''
+config:
+  path: ''
+grpc:
+  client:
+    address: localhost:9666
+  authKey: Crawlab2021!
\ No newline at end of file
diff --git a/backend/test/config-master.json b/backend/test/config-master.json
new file mode 100644
index 00000000..98ead88c
--- /dev/null
+++ b/backend/test/config-master.json
@@ -0,0 +1,10 @@
+{
+  "key": "master",
+  "is_master": true,
+  "name": "master",
+  "ip": "",
+  "mac": "",
+  "hostname": "",
+  "description": "",
+  "auth_key": "Crawlab2021!"
+}
\ No newline at end of file
diff --git a/backend/test/config-worker-invalid-auth-key.json b/backend/test/config-worker-invalid-auth-key.json
new file mode 100644
index 00000000..5c724985
--- /dev/null
+++ b/backend/test/config-worker-invalid-auth-key.json
@@ -0,0 +1,10 @@
+{
+  "key": "worker-invalid-auth-key",
+  "is_master": false,
+  "name": "worker",
+  "ip": "",
+  "mac": "",
+  "hostname": "",
+  "description": "",
+  "auth_key": "invalid-auth-key"
+}
\ No newline at end of file
diff --git a/backend/test/config-worker.json b/backend/test/config-worker.json
new file mode 100644
index 00000000..f88c1630
--- /dev/null
+++ b/backend/test/config-worker.json
@@ -0,0 +1,10 @@
+{
+  "key": "worker",
+  "is_master": false,
+  "name": "worker",
+  "ip": "",
+  "mac": "",
+  "hostname": "",
+  "description": "",
+  "auth_key": "Crawlab2021!"
+}
\ No newline at end of file