diff --git a/container/gset/gset_str_set.go b/container/gset/gset_str_set.go
index 3d13de1e4..9a36f9016 100644
--- a/container/gset/gset_str_set.go
+++ b/container/gset/gset_str_set.go
@@ -69,7 +69,7 @@ func (set *StrSet) Add(item ...string) {
 }
 
 // AddIfNotExist checks whether item exists in the set,
-// it adds the item to set and returns true if it does not exists in the set,
+// it adds the item to set and returns true if it does not exist in the set,
 // or else it does nothing and returns false.
 func (set *StrSet) AddIfNotExist(item string) bool {
 	if !set.Contains(item) {
diff --git a/contrib/balancer/balancer.go b/contrib/balancer/balancer.go
index 1a1a3a556..01b5ffc60 100644
--- a/contrib/balancer/balancer.go
+++ b/contrib/balancer/balancer.go
@@ -2,20 +2,14 @@ package balancer
 
 import (
 	"github.com/gogf/gf/v2/net/gsel"
-	"github.com/gogf/gf/v2/net/gsvc"
-
 	"google.golang.org/grpc/balancer"
 	"google.golang.org/grpc/balancer/base"
 )
 
 const (
-	rawSvcKeyInSubConnInfo = `RawService`
+	RawSvcKeyInSubConnInfo = `RawService`
 )
 
-type Builder struct {
-	selector gsel.Selector
-}
-
 func Register(name string, selector gsel.Selector) {
 	balancer.Register(base.NewBalancerBuilder(
 		name,
@@ -23,23 +17,3 @@ func Register(name string, selector gsel.Selector) {
 		base.Config{HealthCheck: true},
 	))
 }
-
-// Build creates a grpc Picker.
-func (b *Builder) Build(info base.PickerBuildInfo) balancer.Picker {
-	if len(info.ReadySCs) == 0 {
-		return base.NewErrPicker(balancer.ErrNoSubConnAvailable)
-	}
-	nodes := make([]gsel.Node, len(info.ReadySCs))
-	for conn, subConnInfo := range info.ReadySCs {
-		svc, _ := subConnInfo.Address.Attributes.Value(rawSvcKeyInSubConnInfo).(*gsvc.Service)
-		nodes = append(nodes, &grpcNode{
-			service: svc,
-			subConn: conn,
-		})
-	}
-	p := &Picker{
-		selector: b.selector,
-	}
-	p.selector.Update(nodes)
-	return p
-}
diff --git a/contrib/balancer/balancer_builder.go b/contrib/balancer/balancer_builder.go
new file mode 100644
index 000000000..bf33cb184
--- /dev/null
+++ b/contrib/balancer/balancer_builder.go
@@ -0,0 +1,37 @@
+package balancer
+
+import (
+	"github.com/gogf/gf/v2/net/gsel"
+	"github.com/gogf/gf/v2/net/gsvc"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/balancer/base"
+)
+
+// Builder implements grpc balancer base.PickerBuilder,
+// which returns a picker that will be used by gRPC to pick a SubConn.
+type Builder struct {
+	selector gsel.Selector
+}
+
+// Build returns a picker that will be used by gRPC to pick a SubConn.
+func (b *Builder) Build(info base.PickerBuildInfo) balancer.Picker {
+	if len(info.ReadySCs) == 0 {
+		return base.NewErrPicker(balancer.ErrNoSubConnAvailable)
+	}
+	nodes := make([]gsel.Node, len(info.ReadySCs))
+	for conn, subConnInfo := range info.ReadySCs {
+		svc, _ := subConnInfo.Address.Attributes.Value(RawSvcKeyInSubConnInfo).(*gsvc.Service)
+		nodes = append(nodes, &Node{
+			service: svc,
+			conn:    conn,
+		})
+	}
+	p := &Picker{
+		selector: b.selector,
+	}
+	err := p.selector.Update(nodes)
+	if err != nil {
+		panic(err)
+	}
+	return p
+}
diff --git a/contrib/balancer/balancer_grpc_node.go b/contrib/balancer/balancer_node.go
similarity index 60%
rename from contrib/balancer/balancer_grpc_node.go
rename to contrib/balancer/balancer_node.go
index ef0059251..d4a2d93f1 100644
--- a/contrib/balancer/balancer_grpc_node.go
+++ b/contrib/balancer/balancer_node.go
@@ -5,11 +5,11 @@ import (
 	"google.golang.org/grpc/balancer"
 )
 
-type grpcNode struct {
+type Node struct {
 	service *gsvc.Service
-	subConn balancer.SubConn
+	conn    balancer.SubConn
 }
 
-func (n *grpcNode) Service() *gsvc.Service {
+func (n *Node) Service() *gsvc.Service {
 	return n.service
 }
diff --git a/contrib/balancer/balancer_picker.go b/contrib/balancer/balancer_picker.go
index 5ed4762b3..9776cfda5 100644
--- a/contrib/balancer/balancer_picker.go
+++ b/contrib/balancer/balancer_picker.go
@@ -5,17 +5,42 @@ import (
 	"google.golang.org/grpc/balancer"
 )
 
+// Picker implements grpc balancer.Picker,
+// which is used by gRPC to pick a SubConn to send an RPC.
+// Balancer is expected to generate a new picker from its snapshot every time its
+// internal state has changed.
+//
+// The pickers used by gRPC can be updated by ClientConn.UpdateState().
 type Picker struct {
 	selector gsel.Selector
 }
 
+// Pick returns the connection to use for this RPC and related information.
+//
+// Pick should not block.  If the balancer needs to do I/O or any blocking
+// or time-consuming work to service this call, it should return
+// ErrNoSubConnAvailable, and the Pick call will be repeated by gRPC when
+// the Picker is updated (using ClientConn.UpdateState).
+//
+// If an error is returned:
+//
+// - If the error is ErrNoSubConnAvailable, gRPC will block until a new
+//   Picker is provided by the balancer (using ClientConn.UpdateState).
+//
+// - If the error is a status error (implemented by the grpc/status
+//   package), gRPC will terminate the RPC with the code and message
+//   provided.
+//
+// - For all other errors, wait for ready RPCs will wait, but non-wait for
+//   ready RPCs will be terminated with this error's Error() string and
+//   status code Unavailable.
 func (p *Picker) Pick(info balancer.PickInfo) (balancer.PickResult, error) {
 	node, done, err := p.selector.Pick(info.Ctx)
 	if err != nil {
 		return balancer.PickResult{}, err
 	}
 	return balancer.PickResult{
-		SubConn: node.(*grpcNode).subConn,
+		SubConn: node.(*Node).conn,
 		Done: func(di balancer.DoneInfo) {
 			done(info.Ctx, gsel.DoneInfo{
 				Err:           di.Err,
diff --git a/contrib/registry/etcd/etcd.go b/contrib/registry/etcd/etcd.go
new file mode 100644
index 000000000..45201a299
--- /dev/null
+++ b/contrib/registry/etcd/etcd.go
@@ -0,0 +1,32 @@
+package etcd
+
+import (
+	"time"
+
+	"github.com/gogf/gf/v2/net/gsvc"
+	"github.com/gogf/gf/v2/os/glog"
+	etcd3 "go.etcd.io/etcd/client/v3"
+)
+
+var (
+	_ gsvc.Registry = &Registry{}
+	_ gsvc.Watcher  = &watcher{}
+)
+
+// Registry is etcd registry.
+type Registry struct {
+	client       *etcd3.Client
+	kv           etcd3.KV
+	lease        etcd3.Lease
+	keepaliveTTL time.Duration
+	logger       *glog.Logger
+}
+
+type Option struct {
+	Logger       *glog.Logger
+	KeepaliveTTL time.Duration
+}
+
+const (
+	DefaultKeepAliveTTL = 10 * time.Second
+)
diff --git a/contrib/registry/etcd/etcd_registry.go b/contrib/registry/etcd/etcd_registry.go
new file mode 100644
index 000000000..6db312482
--- /dev/null
+++ b/contrib/registry/etcd/etcd_registry.go
@@ -0,0 +1,142 @@
+package etcd
+
+import (
+	"context"
+
+	"github.com/gogf/gf/v2/errors/gcode"
+	"github.com/gogf/gf/v2/errors/gerror"
+	"github.com/gogf/gf/v2/net/gsvc"
+	"github.com/gogf/gf/v2/text/gstr"
+	etcd3 "go.etcd.io/etcd/client/v3"
+)
+
+func New(address string, option ...Option) (*Registry, error) {
+	endpoints := gstr.SplitAndTrim(address, ",")
+	if len(endpoints) == 0 {
+		return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid etcd address "%s"`, address)
+	}
+	client, err := etcd3.New(etcd3.Config{
+		Endpoints: endpoints,
+	})
+	if err != nil {
+		return nil, gerror.Wrap(err, `create etcd client failed`)
+	}
+	return NewWithClient(client, option...), nil
+}
+
+func NewWithClient(client *etcd3.Client, option ...Option) *Registry {
+	r := &Registry{
+		client: client,
+		kv:     etcd3.NewKV(client),
+	}
+	if len(option) > 0 {
+		r.logger = option[0].Logger
+		r.keepaliveTTL = option[0].KeepaliveTTL
+	}
+	if r.keepaliveTTL == 0 {
+		r.keepaliveTTL = DefaultKeepAliveTTL
+	}
+	return r
+}
+
+func (r *Registry) Register(ctx context.Context, service *gsvc.Service) error {
+	r.lease = etcd3.NewLease(r.client)
+	grant, err := r.lease.Grant(ctx, int64(r.keepaliveTTL.Seconds()))
+	if err != nil {
+		return err
+	}
+	_, err = r.client.Put(ctx, service.Key(), service.Value(), etcd3.WithLease(grant.ID))
+	if err != nil {
+		return err
+	}
+	keepAliceCh, err := r.client.KeepAlive(ctx, grant.ID)
+	if err != nil {
+		return err
+	}
+	go r.doKeepAlive(ctx, grant.ID, keepAliceCh)
+	return nil
+}
+
+func (r *Registry) Deregister(ctx context.Context, service *gsvc.Service) error {
+	defer func() {
+		if r.lease != nil {
+			_ = r.lease.Close()
+		}
+	}()
+	_, err := r.client.Delete(ctx, service.Key())
+	return err
+}
+
+func (r *Registry) Search(ctx context.Context, in gsvc.SearchInput) ([]*gsvc.Service, error) {
+	res, err := r.kv.Get(ctx, in.Key(), etcd3.WithPrefix())
+	if err != nil {
+		return nil, err
+	}
+	services, err := extractResponseToServices(res)
+	if err != nil {
+		return nil, err
+	}
+	// Service filter.
+	filteredServices := make([]*gsvc.Service, 0)
+	for _, v := range services {
+		if in.Deployment != "" && in.Deployment != v.Deployment {
+			continue
+		}
+		if in.Namespace != "" && in.Namespace != v.Namespace {
+			continue
+		}
+		if in.Name != "" && in.Name != v.Name {
+			continue
+		}
+		if in.Version != "" && in.Version != v.Version {
+			continue
+		}
+		service := v
+		filteredServices = append(filteredServices, service)
+	}
+	return filteredServices, nil
+}
+
+func (r *Registry) Watch(ctx context.Context, key string) (gsvc.Watcher, error) {
+	return newWatcher(ctx, key, r.client)
+}
+
+// doKeepAlive continuously keeps alive the lease from ETCD.
+func (r *Registry) doKeepAlive(
+	ctx context.Context, leaseID etcd3.LeaseID, keepAliceCh <-chan *etcd3.LeaseKeepAliveResponse,
+) {
+	for {
+		select {
+		case <-r.client.Ctx().Done():
+			r.logger.Debugf(ctx, "keepalive done for lease id: %d", leaseID)
+			return
+
+		case res, ok := <-keepAliceCh:
+			if res != nil {
+				r.logger.Debugf(ctx, `keepalive loop: %v, %s`, ok, res.String())
+			}
+			if !ok {
+				r.logger.Debugf(ctx, `keepalive exit, lease id: %d`, leaseID)
+				return
+			}
+		}
+	}
+}
+
+// extractResponseToServices extracts etcd watch response context to service list.
+func extractResponseToServices(res *etcd3.GetResponse) ([]*gsvc.Service, error) {
+	var services []*gsvc.Service
+	if res == nil || res.Kvs == nil {
+		return services, nil
+	}
+	for _, kv := range res.Kvs {
+		service, err := gsvc.NewServiceFromKV(kv.Key, kv.Value)
+		if err != nil {
+			return services, err
+		}
+		if service != nil {
+			services = append(services, service)
+		}
+	}
+	return services, nil
+}
diff --git a/contrib/registry/etcd/etcd_watcher.go b/contrib/registry/etcd/etcd_watcher.go
new file mode 100644
index 000000000..4ee36c214
--- /dev/null
+++ b/contrib/registry/etcd/etcd_watcher.go
@@ -0,0 +1,60 @@
+package etcd
+
+import (
+	"context"
+
+	"github.com/gogf/gf/v2/net/gsvc"
+	etcd3 "go.etcd.io/etcd/client/v3"
+)
+
+type watcher struct {
+	key         string
+	ctx         context.Context
+	cancel      context.CancelFunc
+	watchChan   etcd3.WatchChan
+	watcher     etcd3.Watcher
+	kv          etcd3.KV
+	initialized bool
+}
+
+func newWatcher(ctx context.Context, key string, client *etcd3.Client) (*watcher, error) {
+	w := &watcher{
+		key:         key,
+		watcher:     etcd3.NewWatcher(client),
+		kv:          etcd3.NewKV(client),
+		initialized: false,
+	}
+	w.ctx, w.cancel = context.WithCancel(ctx)
+	w.watchChan = w.watcher.Watch(w.ctx, key, etcd3.WithPrefix(), etcd3.WithRev(0))
+	err := w.watcher.RequestProgress(context.Background())
+	if err != nil {
+		return nil, err
+	}
+	return w, nil
+}
+
+func (w *watcher) Proceed() ([]*gsvc.Service, error) {
+	if !w.initialized {
+		w.initialized = true
+		return w.getServicesByPrefix()
+	}
+	select {
+	case <-w.ctx.Done():
+		return nil, w.ctx.Err()
+	case <-w.watchChan:
+		return w.getServicesByPrefix()
+	}
+}
+
+func (w *watcher) Close() error {
+	w.cancel()
+	return w.watcher.Close()
+}
+
+func (w *watcher) getServicesByPrefix() ([]*gsvc.Service, error) {
+	res, err := w.kv.Get(w.ctx, w.key, etcd3.WithPrefix())
+	if err != nil {
+		return nil, err
+	}
+	return extractResponseToServices(res)
+}
diff --git a/contrib/resolver/resolver.go b/contrib/resolver/resolver.go
new file mode 100644
index 000000000..8deae4445
--- /dev/null
+++ b/contrib/resolver/resolver.go
@@ -0,0 +1,15 @@
+package resolver
+
+import (
+	"google.golang.org/grpc/resolver"
+)
+
+// Register registers the resolver builder to the resolver map. b.Scheme will be
+// used as the scheme registered with this builder.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe. If multiple Resolvers are
+// registered with the same name, the one registered last will take effect.
+func Register(builder resolver.Builder) {
+	resolver.Register(builder)
+}
diff --git a/contrib/resolver/resolver_builder.go b/contrib/resolver/resolver_builder.go
new file mode 100644
index 000000000..e980fa92e
--- /dev/null
+++ b/contrib/resolver/resolver_builder.go
@@ -0,0 +1,50 @@
+package resolver
+
+import (
+	"context"
+
+	"github.com/gogf/gf/v2/errors/gerror"
+	"github.com/gogf/gf/v2/net/gsvc"
+	"google.golang.org/grpc/resolver"
+)
+
+const Name = "katyusha"
+
+type Builder struct {
+	registry gsvc.Registry
+}
+
+// NewBuilder creates a builder which is used to factory registry resolvers.
+func NewBuilder(registry gsvc.Registry) resolver.Builder {
+	b := &Builder{
+		registry: registry,
+	}
+	return b
+}
+
+func (b *Builder) Build(
+	target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions,
+) (resolver.Resolver, error) {
+	var (
+		err         error
+		watcher     gsvc.Watcher
+		ctx, cancel = context.WithCancel(context.Background())
+	)
+	if watcher, err = b.registry.Watch(ctx, target.URL.Path); err != nil {
+		cancel()
+		return nil, gerror.Wrap(err, `registry.Watch failed`)
+	}
+	r := &Resolver{
+		watcher: watcher,
+		cc:      cc,
+		ctx:     ctx,
+		cancel:  cancel,
+	}
+	go r.watch()
+	return r, nil
+}
+
+// Scheme return scheme of discovery
+func (*Builder) Scheme() string {
+	return Name
+}
diff --git a/contrib/resolver/resolver_resolver.go b/contrib/resolver/resolver_resolver.go
new file mode 100644
index 000000000..9b480b6c2
--- /dev/null
+++ b/contrib/resolver/resolver_resolver.go
@@ -0,0 +1,89 @@
+package resolver
+
+import (
+	"context"
+	"time"
+
+	"github.com/gogf/gf/v2/container/gset"
+	"github.com/gogf/gf/v2/contrib/balancer"
+	"github.com/gogf/gf/v2/net/gsvc"
+	"github.com/gogf/gf/v2/os/glog"
+	"google.golang.org/grpc/attributes"
+	"google.golang.org/grpc/resolver"
+)
+
+type Resolver struct {
+	watcher gsvc.Watcher
+	cc      resolver.ClientConn
+	ctx     context.Context
+	cancel  context.CancelFunc
+	logger  *glog.Logger
+}
+
+func (r *Resolver) watch() {
+	for {
+		select {
+		case <-r.ctx.Done():
+			return
+
+		default:
+			services, err := r.watcher.Proceed()
+			if err != nil {
+				r.logger.Warningf(r.ctx, `watcher.Proceed error: %+v`, err)
+				time.Sleep(time.Second)
+				continue
+			}
+			r.update(services)
+		}
+	}
+}
+
+func (r *Resolver) update(services []*gsvc.Service) {
+	var (
+		err        error
+		addresses  = make([]resolver.Address, 0)
+		addressSet = gset.NewStrSet()
+	)
+	for _, service := range services {
+		if !addressSet.AddIfNotExist(service.Address) {
+			continue
+		}
+		addr := resolver.Address{
+			Addr:       service.Address,
+			ServerName: service.Name,
+			Attributes: newAttributesFromMetadata(service.Metadata),
+		}
+		addr.Attributes = addr.Attributes.WithValue(balancer.RawSvcKeyInSubConnInfo, service)
+		addresses = append(addresses, addr)
+	}
+	if len(addresses) == 0 {
+		r.logger.Noticef(r.ctx, "empty addresses parsed from: %+v", services)
+		return
+	}
+	if err = r.cc.UpdateState(resolver.State{Addresses: addresses}); err != nil {
+		r.logger.Errorf(r.ctx, "UpdateState failed: %+v", err)
+	}
+}
+
+func (r *Resolver) Close() {
+	if err := r.watcher.Close(); err != nil {
+		r.logger.Errorf(r.ctx, `%+v`, err)
+	}
+	r.cancel()
+}
+
+func (r *Resolver) ResolveNow(options resolver.ResolveNowOptions) {
+
+}
+
+func newAttributesFromMetadata(metadata map[string]interface{}) *attributes.Attributes {
+	var a *attributes.Attributes
+	for k, v := range metadata {
+		if a == nil {
+			a = attributes.New(k, v)
+		} else {
+			a = a.WithValue(k, v)
+		}
+	}
+	return a
+}
diff --git a/go.mod b/go.mod
index 67817f8f8..9c312f425 100644
--- a/go.mod
+++ b/go.mod
@@ -12,9 +12,10 @@ require (
 	github.com/gorilla/websocket v1.4.2
 	github.com/grokify/html-strip-tags-go v0.0.1
 	github.com/olekukonko/tablewriter v0.0.5
-	go.opentelemetry.io/otel v1.0.0
-	go.opentelemetry.io/otel/sdk v1.0.0
-	go.opentelemetry.io/otel/trace v1.0.0
+	go.etcd.io/etcd/client/v3 v3.5.1
+	go.opentelemetry.io/otel v1.3.0
+	go.opentelemetry.io/otel/sdk v1.3.0
+	go.opentelemetry.io/otel/trace v1.3.0
 	golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2
 	golang.org/x/text v0.3.8-0.20211105212822-18b340fc7af2
 	google.golang.org/grpc v1.43.0
diff --git a/go.sum b/go.sum
index fd2454338..e9386658e 100644
--- a/go.sum
+++ b/go.sum
@@ -3,8 +3,20 @@ cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw=
 github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/StackExchange/wmi v1.2.1/go.mod h1:rcmrprowKIVzvc+NUiLncP2uuArMWLCbu9SBzvHz7e8=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
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@@ -14,18 +26,26 @@ github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDk
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@@ -35,14 +55,38 @@ github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4
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@@ -61,16 +105,38 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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@@ -78,6 +144,13 @@ github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9
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 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e h1:WUoyKPm6nCo1BnNUvPGnFG3T5DUVem42yDJZZ4CNxMA=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210816074244-15123e1e1f71 h1:ikCpsnYR+Ew0vu99XlDp55lGgDJdIMx3f4a18jfse/s=
+golang.org/x/sys v0.0.0-20210816074244-15123e1e1f71/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.8-0.20211105212822-18b340fc7af2 h1:GLw7MR8AfAG2GmGcmVgObFOHXYypgGjnGno25RDwn3Y=
 golang.org/x/text v0.3.8-0.20211105212822-18b340fc7af2/go.mod h1:EFNZuWvGYxIRUEX+K8UmCFwYmZjqcrnq15ZuVldZkZ0=
@@ -170,7 +313,11 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -183,12 +330,17 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
+google.golang.org/genproto v0.0.0-20211223182754-3ac035c7e7cb h1:ZrsicilzPCS/Xr8qtBZZLpy4P9TYXAfl49ctG1/5tgw=
+google.golang.org/genproto v0.0.0-20211223182754-3ac035c7e7cb/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
+google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/grpc v1.43.0 h1:Eeu7bZtDZ2DpRCsLhUlcrLnvYaMK1Gz86a+hMVvELmM=
 google.golang.org/grpc v1.43.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
@@ -201,16 +353,22 @@ google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
@@ -219,3 +377,4 @@ gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
diff --git a/net/gsvc/gsvc.go b/net/gsvc/gsvc.go
index f89b565b6..136758bc1 100644
--- a/net/gsvc/gsvc.go
+++ b/net/gsvc/gsvc.go
@@ -23,7 +23,7 @@ type Registry interface {
 	Search(ctx context.Context, in SearchInput) ([]*Service, error)
 
 	// Watch watches specified condition changes.
-	Watch(ctx context.Context, in WatchInput) (Watcher, error)
+	Watch(ctx context.Context, key string) (Watcher, error)
 }
 
 // Watcher interface for service.
diff --git a/net/gsvc/gsvc_registry.go b/net/gsvc/gsvc_registry.go
index 0a4b1886c..9e1c904b0 100644
--- a/net/gsvc/gsvc_registry.go
+++ b/net/gsvc/gsvc_registry.go
@@ -38,6 +38,6 @@ func Search(ctx context.Context, in SearchInput) ([]*Service, error) {
 }
 
 // Watch watches specified condition changes.
-func Watch(ctx context.Context, in WatchInput) (Watcher, error) {
-	return defaultRegistry.Watch(ctx, in)
+func Watch(ctx context.Context, key string) (Watcher, error) {
+	return defaultRegistry.Watch(ctx, key)
 }
diff --git a/net/gsvc/gsvc_search.go b/net/gsvc/gsvc_search.go
new file mode 100644
index 000000000..904c7c1e5
--- /dev/null
+++ b/net/gsvc/gsvc_search.go
@@ -0,0 +1,27 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gsvc
+
+func (s *SearchInput) Key() string {
+	keyPrefix := ""
+	if s.Prefix != "" {
+		keyPrefix += "/" + s.Prefix
+	}
+	if s.Deployment != "" {
+		keyPrefix += "/" + s.Deployment
+		if s.Namespace != "" {
+			keyPrefix += "/" + s.Namespace
+			if s.Name != "" {
+				keyPrefix += "/" + s.Name
+				if s.Version != "" {
+					keyPrefix += "/" + s.Version
+				}
+			}
+		}
+	}
+	return keyPrefix
+}
diff --git a/net/gsvc/gsvc_service.go b/net/gsvc/gsvc_service.go
index 7fece106f..1c1f77d21 100644
--- a/net/gsvc/gsvc_service.go
+++ b/net/gsvc/gsvc_service.go
@@ -16,8 +16,40 @@ import (
 	"github.com/gogf/gf/v2/text/gstr"
 )
 
+const (
+	DefaultPrefix     = `goframe`
+	DefaultDeployment = `default`
+	DefaultNamespace  = `default`
+	DefaultVersion    = `latest`
+)
+
+// NewServiceFromKV creates and returns service from `key` and `value`.
+func NewServiceFromKV(key, value []byte) (s *Service, err error) {
+	array := gstr.Split(string(key), "/")
+	if len(array) < 6 {
+		return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid service key "%s"`, key)
+	}
+	s = &Service{
+		Prefix:     array[0],
+		Deployment: array[1],
+		Namespace:  array[2],
+		Name:       array[3],
+		Version:    array[4],
+		Address:    array[5],
+		Metadata:   make(map[string]interface{}),
+	}
+	s.autoFillDefaultAttributes()
+	if len(value) > 0 {
+		if err = gjson.Unmarshal(value, &s.Metadata); err != nil {
+			return nil, gerror.WrapCodef(gcode.CodeInvalidParameter, err, `invalid service value "%s"`, value)
+		}
+	}
+	return s, nil
+}
+
 // Key formats the service information and returns the Service as registering key.
 func (s *Service) Key() string {
+	s.autoFillDefaultAttributes()
 	return gstr.Join([]string{
 		s.Prefix,
 		s.Deployment,
@@ -36,25 +68,17 @@ func (s *Service) Value() string {
 	return string(b)
 }
 
-// NewServiceFromKV creates and returns service from `key` and `value`.
-func NewServiceFromKV(key, value string) (s *Service, err error) {
-	array := gstr.Split(key, "/")
-	if len(array) < 6 {
-		return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid service key "%s"`, key)
+func (s *Service) autoFillDefaultAttributes() {
+	if s.Prefix == "" {
+		s.Prefix = DefaultPrefix
 	}
-	s = &Service{
-		Prefix:     array[0],
-		Deployment: array[1],
-		Namespace:  array[2],
-		Name:       array[3],
-		Version:    array[4],
-		Address:    array[5],
-		Metadata:   make(map[string]interface{}),
+	if s.Deployment == "" {
+		s.Deployment = DefaultDeployment
 	}
-	if len(value) > 0 {
-		if err = gjson.Unmarshal([]byte(value), &s.Metadata); err != nil {
-			return nil, gerror.WrapCodef(gcode.CodeInvalidParameter, err, `invalid service value "%s"`, value)
-		}
+	if s.Namespace == "" {
+		s.Namespace = DefaultNamespace
+	}
+	if s.Version == "" {
+		s.Version = DefaultVersion
 	}
-	return s, nil
 }