Repository: go-kratos/kratos
Pull request #2605 (2023-01-05 15:40:59)

feat: support polaris service governance
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codecov-commenter: # [Codecov](https://codecov.io/gh/go-kratos/kratos/pull/2605?src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) Report
> Merging [#2605](https://codecov.io/gh/go-kratos/kratos/pull/2605?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) (b68d5c1) into [main](https://codecov.io/gh/go-kratos/kratos/commit/eafbe908a84d30bdb4fb2e72cb05ff77e1ed9ff8?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) (eafbe90) will **not change** coverage.
> The diff coverage is `n/a`.

> :exclamation: Current head b68d5c1 differs from pull request most recent head 1f7a430. Consider uploading reports for the commit 1f7a430 to get more accurate results

```diff
@@           Coverage Diff           @@
##             main    #2605   +/-   ##
=======================================
  Coverage   85.18%   85.18%           
=======================================
  Files          88       88           
  Lines        3840     3840           
=======================================
  Hits         3271     3271           
  Misses        396      396           
  Partials      173      173           
```



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Patch:
diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index fe89b765..a93a2dc8 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -13,7 +13,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go: [1.16, 1.17, 1.18, 1.19]
+        go: [1.17,1.18,1.19]
     name: build & test
     runs-on: ubuntu-latest
     services:
@@ -36,7 +36,7 @@ jobs:
           - "8848:8848"
           - "9848:9848"
       polaris:
-        image: polarismesh/polaris-server-standalone:v1.9.0
+        image: polarismesh/polaris-server-standalone:v1.13.3
         ports:
           - 8090:8090
           - 8091:8091
@@ -48,6 +48,21 @@ jobs:
         with:
           go-version: ${{ matrix.go }}
 
+      - name: Setup Environment
+        run: |
+          echo "GOPATH=$(go env GOPATH)" >> $GITHUB_ENV
+          echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
+
+      - name: Module cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go
+
       - name: Build
         run: go build ./...
 
@@ -67,4 +82,4 @@ jobs:
         run: |
           cd cmd/protoc-gen-go-http
           go build ./...
-          go test ./...
+          go test ./...
\ No newline at end of file
diff --git a/contrib/polaris/config.go b/contrib/polaris/config.go
new file mode 100644
index 00000000..5a79d2e8
--- /dev/null
+++ b/contrib/polaris/config.go
@@ -0,0 +1,119 @@
+package polaris
+
+import (
+	"path/filepath"
+	"strings"
+
+	"github.com/polarismesh/polaris-go"
+	"github.com/polarismesh/polaris-go/pkg/model"
+
+	"github.com/go-kratos/kratos/v2/config"
+	"github.com/go-kratos/kratos/v2/log"
+)
+
+// ConfigOption is polaris config option.
+type ConfigOption func(o *configOptions)
+
+type configOptions struct {
+	namespace  string
+	files      []File
+	configFile []polaris.ConfigFile
+}
+
+// WithConfigFile with polaris config file
+func WithConfigFile(file ...File) ConfigOption {
+	return func(o *configOptions) {
+		o.files = file
+	}
+}
+
+type File struct {
+	Name  string
+	Group string
+}
+
+type source struct {
+	client  polaris.ConfigAPI
+	options *configOptions
+}
+
+// Load return the config values
+func (s *source) Load() ([]*config.KeyValue, error) {
+	kv := make([]*config.KeyValue, 0)
+	for _, file := range s.options.files {
+		configFile, err := s.client.GetConfigFile(s.options.namespace, file.Group, file.Name)
+		if err != nil {
+			return nil, err
+		}
+		s.options.configFile = append(s.options.configFile, configFile)
+		kv = append(kv, &config.KeyValue{
+			Key:    file.Name,
+			Value:  []byte(configFile.GetContent()),
+			Format: strings.TrimPrefix(filepath.Ext(file.Name), "."),
+		})
+	}
+	return kv, nil
+}
+
+// Watch return the watcher
+func (s *source) Watch() (config.Watcher, error) {
+	return newConfigWatcher(s.options.configFile), nil
+}
+
+type ConfigWatcher struct {
+	event chan model.ConfigFileChangeEvent
+	cfg   []*config.KeyValue
+}
+
+func receive(event chan model.ConfigFileChangeEvent) func(m model.ConfigFileChangeEvent) {
+	return func(m model.ConfigFileChangeEvent) {
+		defer func() {
+			if err := recover(); err != nil {
+				log.Error(err)
+			}
+		}()
+		event <- m
+	}
+}
+
+func newConfigWatcher(configFile []polaris.ConfigFile) *ConfigWatcher {
+	w := &ConfigWatcher{
+		event: make(chan model.ConfigFileChangeEvent, len(configFile)),
+	}
+	for _, file := range configFile {
+		w.cfg = append(w.cfg, &config.KeyValue{
+			Key:    file.GetFileName(),
+			Value:  []byte(file.GetContent()),
+			Format: strings.TrimPrefix(filepath.Ext(file.GetFileName()), "."),
+		})
+	}
+	for _, file := range configFile {
+		file.AddChangeListener(receive(w.event))
+	}
+	return w
+}
+
+func (w *ConfigWatcher) Next() ([]*config.KeyValue, error) {
+	if event, ok := <-w.event; ok {
+		m := make(map[string]*config.KeyValue)
+		for _, file := range w.cfg {
+			m[file.Key] = file
+		}
+		m[event.ConfigFileMetadata.GetFileName()] = &config.KeyValue{
+			Key:    event.ConfigFileMetadata.GetFileName(),
+			Value:  []byte(event.NewValue),
+			Format: strings.TrimPrefix(filepath.Ext(event.ConfigFileMetadata.GetFileName()), "."),
+		}
+		w.cfg = make([]*config.KeyValue, 0, len(m))
+		for _, kv := range m {
+			w.cfg = append(w.cfg, kv)
+		}
+		return w.cfg, nil
+	}
+	return w.cfg, nil
+}
+
+func (w *ConfigWatcher) Stop() error {
+	close(w.event)
+	return nil
+}
diff --git a/contrib/polaris/go.mod b/contrib/polaris/go.mod
new file mode 100644
index 00000000..cd2e907f
--- /dev/null
+++ b/contrib/polaris/go.mod
@@ -0,0 +1,44 @@
+module github.com/go-kratos/kratos/contrib/polaris/v2
+
+go 1.18
+
+require (
+	github.com/go-kratos/kratos/v2 v2.5.3
+	github.com/google/uuid v1.3.0
+	github.com/polarismesh/polaris-go v1.3.0
+	google.golang.org/protobuf v1.28.0
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/dlclark/regexp2 v1.7.0 // indirect
+	github.com/go-playground/form/v4 v4.2.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/gorilla/mux v1.8.0 // indirect
+	github.com/hashicorp/errwrap v1.0.0 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
+	github.com/imdario/mergo v0.3.12 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/natefinch/lumberjack v2.0.0+incompatible // indirect
+	github.com/prometheus/client_golang v1.12.1 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.32.1 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
+	github.com/spaolacci/murmur3 v1.1.0 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	go.uber.org/zap v1.21.0 // indirect
+	golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4 // indirect
+	golang.org/x/sync v0.0.0-20220513210516-0976fa681c29 // indirect
+	golang.org/x/sys v0.0.0-20220503163025-988cb79eb6c6 // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/genproto v0.0.0-20220519153652-3a47de7e79bd // indirect
+	google.golang.org/grpc v1.46.2 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0 // indirect
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../
diff --git a/contrib/polaris/go.sum b/contrib/polaris/go.sum
new file mode 100644
index 00000000..ad9c6b43
--- /dev/null
+++ b/contrib/polaris/go.sum
@@ -0,0 +1,601 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
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diff --git a/contrib/polaris/polaris.go b/contrib/polaris/polaris.go
new file mode 100644
index 00000000..ec947653
--- /dev/null
+++ b/contrib/polaris/polaris.go
@@ -0,0 +1,79 @@
+package polaris
+
+import (
+	"errors"
+
+	"github.com/polarismesh/polaris-go"
+	"github.com/polarismesh/polaris-go/api"
+
+	"github.com/go-kratos/kratos/v2/config"
+)
+
+type Polaris struct {
+	router    polaris.RouterAPI
+	config    polaris.ConfigAPI
+	limit     polaris.LimitAPI
+	registry  polaris.ProviderAPI
+	discovery polaris.ConsumerAPI
+	namespace string
+}
+
+// Option is polaris option.
+type Option func(o *Polaris)
+
+// WithNamespace with polaris global testNamespace
+func WithNamespace(ns string) Option {
+	return func(o *Polaris) {
+		o.namespace = ns
+	}
+}
+
+// New polaris Service governance.
+func New(sdk api.SDKContext, opts ...Option) Polaris {
+	op := Polaris{
+		router:    polaris.NewRouterAPIByContext(sdk),
+		config:    polaris.NewConfigAPIByContext(sdk),
+		limit:     polaris.NewLimitAPIByContext(sdk),
+		registry:  polaris.NewProviderAPIByContext(sdk),
+		discovery: polaris.NewConsumerAPIByContext(sdk),
+		namespace: "default",
+	}
+	for _, option := range opts {
+		option(&op)
+	}
+	return op
+}
+
+func (p *Polaris) Config(opts ...ConfigOption) (config.Source, error) {
+	options := &configOptions{
+		namespace: p.namespace,
+	}
+
+	for _, opt := range opts {
+		opt(options)
+	}
+
+	if len(options.files) == 0 {
+		return nil, errors.New("fileNames invalid")
+	}
+
+	return &source{
+		client:  p.config,
+		options: options,
+	}, nil
+}
+
+func (p *Polaris) Registry(opts ...RegistryOption) (r *Registry) {
+	op := registryOptions{
+		Namespace: p.namespace,
+		Healthy:   true,
+	}
+	for _, option := range opts {
+		option(&op)
+	}
+	return &Registry{
+		opt:      op,
+		provider: p.registry,
+		consumer: p.discovery,
+	}
+}
diff --git a/contrib/polaris/registry.go b/contrib/polaris/registry.go
new file mode 100644
index 00000000..4d1e4a33
--- /dev/null
+++ b/contrib/polaris/registry.go
@@ -0,0 +1,380 @@
+package polaris
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"net/url"
+	"strconv"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/polarismesh/polaris-go"
+	"github.com/polarismesh/polaris-go/pkg/model"
+
+	"github.com/go-kratos/kratos/v2/registry"
+)
+
+var (
+	_ registry.Registrar = (*Registry)(nil)
+	_ registry.Discovery = (*Registry)(nil)
+)
+
+type registryOptions struct {
+	// required, testNamespace in polaris
+	Namespace string
+
+	// required, service access token
+	ServiceToken string
+
+	// service weight in polaris. Default value is 100, 0 <= weight <= 10000
+	Weight int
+
+	// service priority. Default value is 0. The smaller the value, the lower the priority
+	Priority int
+
+	// To show service is healthy or not. Default value is True .
+	Healthy bool
+
+	// To show service is isolate or not. Default value is False .
+	Isolate bool
+
+	// TTL timeout. if node needs to use heartbeat to report,required. If not set,server will throw ErrorCode-400141
+	TTL int
+
+	// optional, Timeout for single query. Default value is global config
+	// Total is (1+RetryCount) * Timeout
+	Timeout time.Duration
+
+	// optional, retry count. Default value is global config
+	RetryCount int
+}
+
+// RegistryOption is polaris option.
+type RegistryOption func(o *registryOptions)
+
+// Registry is polaris registry.
+type Registry struct {
+	opt      registryOptions
+	provider polaris.ProviderAPI
+	consumer polaris.ConsumerAPI
+}
+
+// WithRegistryServiceToken with ServiceToken option.
+func WithRegistryServiceToken(serviceToken string) RegistryOption {
+	return func(o *registryOptions) { o.ServiceToken = serviceToken }
+}
+
+// WithRegistryWeight with Weight option.
+func WithRegistryWeight(weight int) RegistryOption {
+	return func(o *registryOptions) { o.Weight = weight }
+}
+
+// WithRegistryHealthy with Healthy option.
+func WithRegistryHealthy(healthy bool) RegistryOption {
+	return func(o *registryOptions) { o.Healthy = healthy }
+}
+
+// WithRegistryIsolate with Isolate option.
+func WithRegistryIsolate(isolate bool) RegistryOption {
+	return func(o *registryOptions) { o.Isolate = isolate }
+}
+
+// WithRegistryTTL with TTL option.
+func WithRegistryTTL(TTL int) RegistryOption {
+	return func(o *registryOptions) { o.TTL = TTL }
+}
+
+// WithRegistryTimeout with Timeout option.
+func WithRegistryTimeout(timeout time.Duration) RegistryOption {
+	return func(o *registryOptions) { o.Timeout = timeout }
+}
+
+// WithRegistryRetryCount with RetryCount option.
+func WithRegistryRetryCount(retryCount int) RegistryOption {
+	return func(o *registryOptions) { o.RetryCount = retryCount }
+}
+
+// Register the registration.
+func (r *Registry) Register(_ context.Context, instance *registry.ServiceInstance) error {
+	id := uuid.NewString()
+	for _, endpoint := range instance.Endpoints {
+		u, err := url.Parse(endpoint)
+		if err != nil {
+			return err
+		}
+
+		host, port, err := net.SplitHostPort(u.Host)
+		if err != nil {
+			return err
+		}
+
+		portNum, err := strconv.Atoi(port)
+		if err != nil {
+			return err
+		}
+
+		// metadata
+		if instance.Metadata == nil {
+			instance.Metadata = make(map[string]string)
+		}
+		instance.Metadata["merge"] = id
+		if _, ok := instance.Metadata["weight"]; !ok {
+			instance.Metadata["weight"] = strconv.Itoa(r.opt.Weight)
+		}
+
+		weight, _ := strconv.Atoi(instance.Metadata["weight"])
+
+		_, err = r.provider.RegisterInstance(
+			&polaris.InstanceRegisterRequest{
+				InstanceRegisterRequest: model.InstanceRegisterRequest{
+					Service:      instance.Name,
+					ServiceToken: r.opt.ServiceToken,
+					Namespace:    r.opt.Namespace,
+					Host:         host,
+					Port:         portNum,
+					Protocol:     &u.Scheme,
+					Weight:       &weight,
+					Priority:     &r.opt.Priority,
+					Version:      &instance.Version,
+					Metadata:     instance.Metadata,
+					Healthy:      &r.opt.Healthy,
+					Isolate:      &r.opt.Isolate,
+					TTL:          &r.opt.TTL,
+					Timeout:      &r.opt.Timeout,
+					RetryCount:   &r.opt.RetryCount,
+				},
+			},
+		)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Deregister the registration.
+func (r *Registry) Deregister(_ context.Context, serviceInstance *registry.ServiceInstance) error {
+	for _, endpoint := range serviceInstance.Endpoints {
+		// get url
+		u, err := url.Parse(endpoint)
+		if err != nil {
+			return err
+		}
+
+		// get host and port
+		host, port, err := net.SplitHostPort(u.Host)
+		if err != nil {
+			return err
+		}
+
+		// port to int
+		portNum, err := strconv.Atoi(port)
+		if err != nil {
+			return err
+		}
+		// Deregister
+		err = r.provider.Deregister(
+			&polaris.InstanceDeRegisterRequest{
+				InstanceDeRegisterRequest: model.InstanceDeRegisterRequest{
+					Service:      serviceInstance.Name,
+					ServiceToken: r.opt.ServiceToken,
+					Namespace:    r.opt.Namespace,
+					Host:         host,
+					Port:         portNum,
+					Timeout:      &r.opt.Timeout,
+					RetryCount:   &r.opt.RetryCount,
+				},
+			},
+		)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// GetService return the service instances in memory according to the service name.
+func (r *Registry) GetService(_ context.Context, serviceName string) ([]*registry.ServiceInstance, error) {
+	// get all instances
+	instancesResponse, err := r.consumer.GetInstances(&polaris.GetInstancesRequest{
+		GetInstancesRequest: model.GetInstancesRequest{
+			Service:         serviceName,
+			Namespace:       r.opt.Namespace,
+			Timeout:         &r.opt.Timeout,
+			RetryCount:      &r.opt.RetryCount,
+			SkipRouteFilter: true,
+		},
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	serviceInstances := instancesToServiceInstances(merge(instancesResponse.GetInstances()))
+
+	return serviceInstances, nil
+}
+
+func merge(instances []model.Instance) map[string][]model.Instance {
+	m := make(map[string][]model.Instance)
+	for _, instance := range instances {
+		if v, ok := m[instance.GetMetadata()["merge"]]; ok {
+			m[instance.GetMetadata()["merge"]] = append(v, instance)
+		} else {
+			m[instance.GetMetadata()["merge"]] = []model.Instance{instance}
+		}
+	}
+	return m
+}
+
+// Watch creates a watcher according to the service name.
+func (r *Registry) Watch(ctx context.Context, serviceName string) (registry.Watcher, error) {
+	return newWatcher(ctx, r.opt.Namespace, serviceName, r.consumer)
+}
+
+type Watcher struct {
+	ServiceName      string
+	Namespace        string
+	Ctx              context.Context
+	Cancel           context.CancelFunc
+	Channel          <-chan model.SubScribeEvent
+	service          *model.InstancesResponse
+	ServiceInstances map[string][]model.Instance
+	first            bool
+}
+
+func newWatcher(ctx context.Context, namespace string, serviceName string, consumer polaris.ConsumerAPI) (*Watcher, error) {
+	watchServiceResponse, err := consumer.WatchService(&polaris.WatchServiceRequest{
+		WatchServiceRequest: model.WatchServiceRequest{
+			Key: model.ServiceKey{
+				Namespace: namespace,
+				Service:   serviceName,
+			},
+		},
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	w := &Watcher{
+		Namespace:        namespace,
+		ServiceName:      serviceName,
+		Channel:          watchServiceResponse.EventChannel,
+		service:          watchServiceResponse.GetAllInstancesResp,
+		ServiceInstances: merge(watchServiceResponse.GetAllInstancesResp.GetInstances()),
+	}
+	w.Ctx, w.Cancel = context.WithCancel(ctx)
+	return w, nil
+}
+
+// Next returns services in the following two cases:
+// 1.the first time to watch and the service instance list is not empty.
+// 2.any service instance changes found.
+// if the above two conditions are not met, it will block until context deadline exceeded or canceled
+func (w *Watcher) Next() ([]*registry.ServiceInstance, error) {
+	if !w.first {
+		w.first = true
+		if len(w.ServiceInstances) > 0 {
+			return instancesToServiceInstances(w.ServiceInstances), nil
+		}
+	}
+	select {
+	case <-w.Ctx.Done():
+		return nil, w.Ctx.Err()
+	case event := <-w.Channel:
+		if event.GetSubScribeEventType() == model.EventInstance {
+			// this always true, but we need to check it to make sure EventType not change
+			if instanceEvent, ok := event.(*model.InstanceEvent); ok {
+				// handle DeleteEvent
+				if instanceEvent.DeleteEvent != nil {
+					for _, instance := range instanceEvent.DeleteEvent.Instances {
+						delete(w.ServiceInstances, instance.GetMetadata()["merge"])
+					}
+				}
+				// handle UpdateEvent
+				if instanceEvent.UpdateEvent != nil {
+					for _, update := range instanceEvent.UpdateEvent.UpdateList {
+						if v, ok := w.ServiceInstances[update.After.GetMetadata()["merge"]]; ok {
+							var nv []model.Instance
+							m := map[string]model.Instance{}
+							for _, ins := range v {
+								m[ins.GetId()] = ins
+							}
+							m[update.After.GetId()] = update.After
+							for _, ins := range m {
+								if ins.IsHealthy() {
+									nv = append(nv, ins)
+								}
+							}
+							w.ServiceInstances[update.After.GetMetadata()["merge"]] = nv
+							if len(nv) == 0 {
+								delete(w.ServiceInstances, update.After.GetMetadata()["merge"])
+							}
+						} else {
+							if update.After.IsHealthy() {
+								w.ServiceInstances[update.After.GetMetadata()["merge"]] = []model.Instance{update.After}
+							}
+						}
+					}
+				}
+				// handle AddEvent
+				if instanceEvent.AddEvent != nil {
+					for _, instance := range instanceEvent.AddEvent.Instances {
+						if v, ok := w.ServiceInstances[instance.GetMetadata()["merge"]]; ok {
+							var nv []model.Instance
+							m := map[string]model.Instance{}
+							for _, ins := range v {
+								m[ins.GetId()] = ins
+							}
+							m[instance.GetId()] = instance
+							for _, ins := range m {
+								if ins.IsHealthy() {
+									nv = append(nv, ins)
+								}
+							}
+							if len(nv) != 0 {
+								w.ServiceInstances[instance.GetMetadata()["merge"]] = nv
+							}
+						} else {
+							if instance.IsHealthy() {
+								w.ServiceInstances[instance.GetMetadata()["merge"]] = []model.Instance{instance}
+							}
+						}
+					}
+				}
+			}
+			return instancesToServiceInstances(w.ServiceInstances), nil
+		}
+	}
+	return instancesToServiceInstances(w.ServiceInstances), nil
+}
+
+// Stop close the watcher.
+func (w *Watcher) Stop() error {
+	w.Cancel()
+	return nil
+}
+
+func instancesToServiceInstances(instances map[string][]model.Instance) []*registry.ServiceInstance {
+	serviceInstances := make([]*registry.ServiceInstance, 0, len(instances))
+	for _, inss := range instances {
+		if len(inss) == 0 {
+			continue
+		}
+		ins := &registry.ServiceInstance{
+			ID:       inss[0].GetId(),
+			Name:     inss[0].GetService(),
+			Version:  inss[0].GetVersion(),
+			Metadata: inss[0].GetMetadata(),
+		}
+		for _, item := range inss {
+			if item.IsHealthy() {
+				ins.Endpoints = append(ins.Endpoints, fmt.Sprintf("%s://%s:%d", item.GetProtocol(), item.GetHost(), item.GetPort()))
+			}
+		}
+		if len(ins.Endpoints) != 0 {
+			serviceInstances = append(serviceInstances, ins)
+		}
+	}
+	return serviceInstances
+}
diff --git a/contrib/polaris/router.go b/contrib/polaris/router.go
new file mode 100644
index 00000000..de2d714f
--- /dev/null
+++ b/contrib/polaris/router.go
@@ -0,0 +1,126 @@
+package polaris
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+
+	"github.com/polarismesh/polaris-go"
+	"github.com/polarismesh/polaris-go/pkg/model"
+	"github.com/polarismesh/polaris-go/pkg/model/local"
+	"github.com/polarismesh/polaris-go/pkg/model/pb"
+	v1 "github.com/polarismesh/polaris-go/pkg/model/pb/v1"
+	"google.golang.org/protobuf/types/known/wrapperspb"
+
+	"github.com/go-kratos/kratos/v2"
+	"github.com/go-kratos/kratos/v2/log"
+	"github.com/go-kratos/kratos/v2/selector"
+	"github.com/go-kratos/kratos/v2/transport"
+	"github.com/go-kratos/kratos/v2/transport/http"
+)
+
+// NodeFilter polaris dynamic router selector
+func (p *Polaris) NodeFilter() selector.NodeFilter {
+	return func(ctx context.Context, nodes []selector.Node) []selector.Node {
+		if len(nodes) == 0 {
+			return nodes
+		}
+		if appInfo, ok := kratos.FromContext(ctx); ok {
+			req := &polaris.ProcessRoutersRequest{
+				ProcessRoutersRequest: model.ProcessRoutersRequest{
+					SourceService: model.ServiceInfo{
+						Service:   appInfo.Name(),
+						Namespace: p.namespace,
+					},
+					DstInstances: buildPolarisInstance(p.namespace, nodes),
+				},
+			}
+			req.AddArguments(model.BuildCallerServiceArgument(p.namespace, appInfo.Name()))
+
+			// process transport
+			if tr, ok := transport.FromServerContext(ctx); ok {
+				req.AddArguments(model.BuildMethodArgument(tr.Operation()))
+				req.AddArguments(model.BuildPathArgument(tr.Operation()))
+
+				for _, key := range tr.RequestHeader().Keys() {
+					req.AddArguments(model.BuildHeaderArgument(key, tr.RequestHeader().Get(key)))
+				}
+
+				// http
+				if ht, ok := tr.(http.Transporter); ok {
+					req.AddArguments(model.BuildPathArgument(ht.Request().URL.Path))
+					req.AddArguments(model.BuildCallerIPArgument(ht.Request().RemoteAddr))
+
+					// cookie
+					for _, cookie := range ht.Request().Cookies() {
+						req.AddArguments(model.BuildCookieArgument(cookie.Name, cookie.Value))
+					}
+
+					// url query
+					for key, values := range ht.Request().URL.Query() {
+						req.AddArguments(model.BuildQueryArgument(key, strings.Join(values, ",")))
+					}
+				}
+			}
+
+			n := make(map[string]selector.Node, len(nodes))
+
+			for _, node := range nodes {
+				n[node.Address()] = node
+			}
+
+			m, err := p.router.ProcessRouters(req)
+			if err != nil {
+				log.Errorf("polaris process routers failed, err=%v", err)
+				return nodes
+			}
+
+			newNode := make([]selector.Node, 0, len(m.Instances))
+			for _, ins := range m.GetInstances() {
+				if v, ok := n[fmt.Sprintf("%s:%d", ins.GetHost(), ins.GetPort())]; ok {
+					newNode = append(newNode, v)
+				}
+			}
+			return newNode
+		}
+		return nodes
+	}
+}
+
+func buildPolarisInstance(namespace string, nodes []selector.Node) *pb.ServiceInstancesInProto {
+	ins := make([]*v1.Instance, 0, len(nodes))
+	for _, node := range nodes {
+		host, port, err := net.SplitHostPort(node.Address())
+		if err != nil {
+			return nil
+		}
+		portInt, err := strconv.Atoi(port)
+		if err != nil {
+			return nil
+		}
+		ins = append(ins, &v1.Instance{
+			Id:        wrapperspb.String(node.Metadata()["merge"]),
+			Service:   wrapperspb.String(node.ServiceName()),
+			Namespace: wrapperspb.String(namespace),
+			Host:      wrapperspb.String(host),
+			Port:      wrapperspb.UInt32(uint32(portInt)),
+			Protocol:  wrapperspb.String(node.Scheme()),
+			Version:   wrapperspb.String(node.Version()),
+			Weight:    wrapperspb.UInt32(uint32(*node.InitialWeight())),
+			Metadata:  node.Metadata(),
+		})
+	}
+
+	d := &v1.DiscoverResponse{
+		Code:      wrapperspb.UInt32(1),
+		Info:      wrapperspb.String("ok"),
+		Type:      v1.DiscoverResponse_INSTANCE,
+		Service:   &v1.Service{Name: wrapperspb.String(nodes[0].ServiceName()), Namespace: wrapperspb.String("default")},
+		Instances: ins,
+	}
+	return pb.NewServiceInstancesInProto(d, func(s string) local.InstanceLocalValue {
+		return local.NewInstanceLocalValue()
+	}, &pb.SvcPluginValues{Routers: nil, Loadbalancer: nil}, nil)
+}
diff --git a/contrib/registry/consul/client.go b/contrib/registry/consul/client.go
index dec4a7f8..31d0da68 100644
--- a/contrib/registry/consul/client.go
+++ b/contrib/registry/consul/client.go
@@ -3,6 +3,7 @@ package consul
 import (
 	"context"
 	"fmt"
+	"math/rand"
 	"net"
 	"net/url"
 	"strconv"
@@ -41,25 +42,6 @@ type Client struct {
 	serviceChecks api.AgentServiceChecks
 }
 
-// Deprecated use newClient instead.
-func NewClient(cli *api.Client) *Client {
-	return newClient(cli, SingleDatacenter)
-}
-
-func newClient(cli *api.Client, dc Datacenter) *Client {
-	c := &Client{
-		dc:                             dc,
-		cli:                            cli,
-		resolver:                       defaultResolver,
-		healthcheckInterval:            10,
-		heartbeat:                      true,
-		deregisterCriticalServiceAfter: 600,
-	}
-
-	c.ctx, c.cancel = context.WithCancel(context.Background())
-	return c
-}
-
 func defaultResolver(_ context.Context, entries []*api.ServiceEntry) []*registry.ServiceInstance {
 	services := make([]*registry.ServiceInstance, 0, len(entries))
 	for _, entry := range entries {
@@ -225,7 +207,15 @@ func (c *Client) Register(_ context.Context, svc *registry.ServiceInstance, enab
 				case <-ticker.C:
 					err = c.cli.Agent().UpdateTTL("service:"+svc.ID, "pass", "pass")
 					if err != nil {
-						log.Errorf("[Consul]update ttl heartbeat to consul failed!err:=%v", err)
+						log.Errorf("[Consul] update ttl heartbeat to consul failed! err=%v", err)
+						// when the previous report fails, try to re register the service
+						time.AfterFunc(time.Duration(rand.Intn(5))*time.Second, func() {
+							if err := c.cli.Agent().ServiceRegister(asr); err != nil {
+								log.Errorf("[Consul] re registry service failed!, err=%v", err)
+							} else {
+								log.Warn("[Consul] re registry of service occurred success")
+							}
+						})
 					}
 				case <-c.ctx.Done():
 					return
diff --git a/contrib/registry/consul/registry.go b/contrib/registry/consul/registry.go
index e5ac1819..8105ab1d 100644
--- a/contrib/registry/consul/registry.go
+++ b/contrib/registry/consul/registry.go
@@ -37,7 +37,7 @@ func WithTimeout(timeout time.Duration) Option {
 // WithDatacenter with registry datacenter option
 func WithDatacenter(dc Datacenter) Option {
 	return func(o *Registry) {
-		o.dc = dc
+		o.cli.dc = dc
 	}
 }
 
@@ -98,21 +98,27 @@ type Registry struct {
 	registry          map[string]*serviceSet
 	lock              sync.RWMutex
 	timeout           time.Duration
-	dc                Datacenter
 }
 
 // New creates consul registry
 func New(apiClient *api.Client, opts ...Option) *Registry {
 	r := &Registry{
-		dc:                SingleDatacenter,
 		registry:          make(map[string]*serviceSet),
 		enableHealthCheck: true,
 		timeout:           10 * time.Second,
+		cli: &Client{
+			dc:                             SingleDatacenter,
+			cli:                            apiClient,
+			resolver:                       defaultResolver,
+			healthcheckInterval:            10,
+			heartbeat:                      true,
+			deregisterCriticalServiceAfter: 600,
+		},
 	}
 	for _, o := range opts {
 		o(r)
 	}
-	r.cli = newClient(apiClient, r.dc)
+	r.cli.ctx, r.cli.cancel = context.WithCancel(context.Background())
 	return r
 }
 


Test patch:
diff --git a/contrib/config/polaris/config_test.go b/contrib/polaris/config_test.go
similarity index 59%
rename from contrib/config/polaris/config_test.go
rename to contrib/polaris/config_test.go
index 9559174f..3ad701e4 100644
--- a/contrib/config/polaris/config_test.go
+++ b/contrib/polaris/config_test.go
@@ -1,26 +1,28 @@
-package config
+package polaris
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io"
 	"net/http"
 	"reflect"
 	"strings"
 	"testing"
+	"time"
+
+	"github.com/go-kratos/kratos/v2/config"
 
 	"github.com/polarismesh/polaris-go"
 )
 
 var (
-	namespace     = "default"
-	fileGroup     = "test"
-	originContent = `server:
+	testNamespace     = "default"
+	testFileGroup     = "test"
+	testOriginContent = `server:
 		port: 8080`
-	updatedContent = `server:
+	testUpdatedContent = `server:
 		port: 8090`
-	configCenterURL = "http://127.0.0.1:8090"
+	testCenterURL = "http://127.0.0.1:8090"
 )
 
 func makeJSONRequest(uri string, data string, method string, headers map[string]string) ([]byte, error) {
@@ -57,7 +59,7 @@ type configClient struct {
 }
 
 func newConfigClient() (*configClient, error) {
-	token, err := getToken()
+	token, err := getToken(testCenterURL)
 	if err != nil {
 		return nil, err
 	}
@@ -66,7 +68,7 @@ func newConfigClient() (*configClient, error) {
 	}, nil
 }
 
-func getToken() (string, error) {
+func getToken(testCenterURL string) (string, error) {
 	data, err := json.Marshal(map[string]string{
 		"name":     "polaris",
 		"password": "polaris",
@@ -75,7 +77,7 @@ func getToken() (string, error) {
 		return "", err
 	}
 	// login use default user
-	res, err := makeJSONRequest(fmt.Sprintf("%s/core/v1/user/login", configCenterURL), string(data), http.MethodPost, map[string]string{})
+	res, err := makeJSONRequest(fmt.Sprintf("%s/core/v1/user/login", testCenterURL), string(data), http.MethodPost, map[string]string{})
 	if err != nil {
 		return "", nil
 	}
@@ -89,16 +91,16 @@ func getToken() (string, error) {
 func (client *configClient) createConfigFile(name string) error {
 	data, err := json.Marshal(map[string]string{
 		"name":      name,
-		"namespace": namespace,
-		"group":     fileGroup,
-		"content":   originContent,
+		"namespace": testNamespace,
+		"group":     testFileGroup,
+		"content":   testOriginContent,
 		"modifyBy":  "polaris",
 		"format":    "yaml",
 	})
 	if err != nil {
 		return err
 	}
-	res, err := makeJSONRequest(fmt.Sprintf("%s/config/v1/configfiles", configCenterURL), string(data), http.MethodPost, map[string]string{
+	res, err := makeJSONRequest(fmt.Sprintf("%s/config/v1/configfiles", testCenterURL), string(data), http.MethodPost, map[string]string{
 		"X-Polaris-Token": client.token,
 	})
 	if err != nil {
@@ -111,7 +113,7 @@ func (client *configClient) createConfigFile(name string) error {
 		return err
 	}
 	if resJSON.Code != 200000 {
-		return errors.New("create error")
+		return fmt.Errorf("create error, res: %s", string(res))
 	}
 	return nil
 }
@@ -119,16 +121,16 @@ func (client *configClient) createConfigFile(name string) error {
 func (client *configClient) updateConfigFile(name string) error {
 	data, err := json.Marshal(map[string]string{
 		"name":      name,
-		"namespace": namespace,
-		"group":     fileGroup,
-		"content":   updatedContent,
+		"namespace": testNamespace,
+		"group":     testFileGroup,
+		"content":   testUpdatedContent,
 		"modifyBy":  "polaris",
 		"format":    "yaml",
 	})
 	if err != nil {
 		return err
 	}
-	res, err := makeJSONRequest(fmt.Sprintf("%s/config/v1/configfiles", configCenterURL), string(data), http.MethodPut, map[string]string{
+	res, err := makeJSONRequest(fmt.Sprintf("%s/config/v1/configfiles", testCenterURL), string(data), http.MethodPut, map[string]string{
 		"X-Polaris-Token": client.token,
 	})
 	if err != nil {
@@ -140,7 +142,7 @@ func (client *configClient) updateConfigFile(name string) error {
 		return err
 	}
 	if resJSON.Code != 200000 {
-		return errors.New("update error")
+		return fmt.Errorf("update error, res: %s", string(res))
 	}
 	return nil
 }
@@ -150,7 +152,7 @@ func (client *configClient) deleteConfigFile(name string) error {
 	if err != nil {
 		return err
 	}
-	url := fmt.Sprintf("%s/config/v1/configfiles?namespace=%s&group=%s&name=%s", configCenterURL, namespace, fileGroup, name)
+	url := fmt.Sprintf("%s/config/v1/configfiles?namespace=%s&group=%s&name=%s", testCenterURL, testNamespace, testFileGroup, name)
 	res, err := makeJSONRequest(url, string(data), http.MethodDelete, map[string]string{
 		"X-Polaris-Token": client.token,
 	})
@@ -163,22 +165,22 @@ func (client *configClient) deleteConfigFile(name string) error {
 		return err
 	}
 	if resJSON.Code != 200000 {
-		return errors.New("delete error")
+		return fmt.Errorf("delete error, res: %s", string(res))
 	}
 	return nil
 }
 
 func (client *configClient) publishConfigFile(name string) error {
 	data, err := json.Marshal(map[string]string{
-		"namespace": namespace,
-		"group":     fileGroup,
+		"namespace": testNamespace,
+		"group":     testFileGroup,
 		"fileName":  name,
 		"name":      name,
 	})
 	if err != nil {
 		return err
 	}
-	res, err := makeJSONRequest(fmt.Sprintf("%s/config/v1/configfiles/release", configCenterURL), string(data), http.MethodPost, map[string]string{
+	res, err := makeJSONRequest(fmt.Sprintf("%s/config/v1/configfiles/release", testCenterURL), string(data), http.MethodPost, map[string]string{
 		"X-Polaris-Token": client.token,
 	})
 	if err != nil {
@@ -190,30 +192,35 @@ func (client *configClient) publishConfigFile(name string) error {
 		return err
 	}
 	if resJSON.Code != 200000 {
-		return errors.New("publish error")
+		return fmt.Errorf("publish error, res: %s", string(res))
 	}
 	return nil
 }
 
 func TestConfig(t *testing.T) {
-	name := "test.yaml"
+	name := "kratos-polaris-test.yaml"
 	client, err := newConfigClient()
 	if err != nil {
 		t.Fatal(err)
 	}
+	_ = client.deleteConfigFile(name)
 	if err = client.createConfigFile(name); err != nil {
 		t.Fatal(err)
 	}
+	time.Sleep(5 * time.Second)
 	if err = client.publishConfigFile(name); err != nil {
 		t.Fatal(err)
 	}
 
+	time.Sleep(5 * time.Second)
+
 	// Always remember clear test resource
-	configAPI, err := polaris.NewConfigAPI()
+	sdk, err := polaris.NewSDKContextByAddress("127.0.0.1:8091")
 	if err != nil {
 		t.Fatal(err)
 	}
-	config, err := New(configAPI, WithNamespace(namespace), WithFileGroup(fileGroup), WithFileName(name))
+	p := New(sdk)
+	config, err := p.Config(WithConfigFile(File{Name: name, Group: testFileGroup}))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -222,7 +229,10 @@ func TestConfig(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if len(kv) != 1 || kv[0].Key != name || string(kv[0].Value) != originContent {
+	for _, value := range kv {
+		t.Logf("key: %s, value: %s", value.Key, value.Value)
+	}
+	if len(kv) != 1 || kv[0].Key != name || string(kv[0].Value) != testOriginContent {
 		t.Fatal("config error")
 	}
 
@@ -230,18 +240,13 @@ func TestConfig(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	defer func() {
+
+	t.Cleanup(func() {
 		err = client.deleteConfigFile(name)
 		if err != nil {
 			t.Fatal(err)
 		}
-		if _, err = w.Next(); err != nil {
-			t.Fatal(err)
-		}
-		if err = w.Stop(); err != nil {
-			t.Fatal(err)
-		}
-	}()
+	})
 
 	if err = client.updateConfigFile(name); err != nil {
 		t.Fatal(err)
@@ -255,17 +260,22 @@ func TestConfig(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if len(kv) != 1 || kv[0].Key != name || string(kv[0].Value) != updatedContent {
+	for _, value := range kv {
+		t.Log(value.Key, string(value.Value))
+	}
+
+	if len(kv) != 1 || kv[0].Key != name || string(kv[0].Value) != testUpdatedContent {
 		t.Fatal("config error")
 	}
 }
 
 func TestExtToFormat(t *testing.T) {
-	name := "ext.yaml"
+	name := "kratos-polaris-ext.yaml"
 	client, err := newConfigClient()
 	if err != nil {
 		t.Fatal(err)
 	}
+	_ = client.deleteConfigFile(name)
 	if err = client.createConfigFile(name); err != nil {
 		t.Fatal(err)
 	}
@@ -274,22 +284,24 @@ func TestExtToFormat(t *testing.T) {
 	}
 
 	// Always remember clear test resource
-	defer func() {
+	t.Cleanup(func() {
 		if err = client.deleteConfigFile(name); err != nil {
 			t.Fatal(err)
 		}
-	}()
+	})
 
-	configAPI, err := polaris.NewConfigAPI()
+	sdk, err := polaris.NewSDKContextByAddress("127.0.0.1:8091")
 	if err != nil {
 		t.Fatal(err)
 	}
+	p := New(sdk)
 
-	config, err := New(configAPI, WithNamespace(namespace), WithFileGroup(fileGroup), WithFileName(name))
+	cfg, err := p.Config(WithConfigFile(File{Name: name, Group: testFileGroup}))
 	if err != nil {
 		t.Fatal(err)
 	}
-	kv, err := config.Load()
+
+	kv, err := cfg.Load()
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -299,10 +311,76 @@ func TestExtToFormat(t *testing.T) {
 	if !reflect.DeepEqual(name, kv[0].Key) {
 		t.Errorf("kvs[0].Key is %s", kv[0].Key)
 	}
-	if !reflect.DeepEqual(originContent, string(kv[0].Value)) {
+	if !reflect.DeepEqual(testOriginContent, string(kv[0].Value)) {
 		t.Errorf("kvs[0].Value is %s", kv[0].Value)
 	}
 	if !reflect.DeepEqual("yaml", kv[0].Format) {
 		t.Errorf("kvs[0].Format is %s", kv[0].Format)
 	}
 }
+
+func TestGetMultipleConfig(t *testing.T) {
+	client, err := newConfigClient()
+	files := make([]File, 0, 3)
+	for i := 0; i < 3; i++ {
+		name := fmt.Sprintf("kratos-polaris-test-%d.yaml", i)
+		if err != nil {
+			t.Fatal(err)
+		}
+		_ = client.deleteConfigFile(name)
+		if err = client.createConfigFile(name); err != nil {
+			t.Fatal(err)
+		}
+		if err = client.publishConfigFile(name); err != nil {
+			t.Fatal(err)
+		}
+		files = append(files, File{Name: name, Group: testFileGroup})
+	}
+
+	sdk, err := polaris.NewSDKContextByAddress("127.0.0.1:8091")
+	if err != nil {
+		t.Fatal(err)
+	}
+	p := New(sdk, WithNamespace("default"))
+
+	cfg, err := p.Config(WithConfigFile(files...))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	kvs, err := cfg.Load()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, kv := range kvs {
+		t.Logf("key: %s, value: %s", kv.Key, kv.Value)
+	}
+
+	w, err := cfg.Watch()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, file := range files {
+		if err = client.publishConfigFile(file.Name); err != nil {
+			t.Fatal(err)
+		}
+		kvs, err := w.Next()
+		if err != nil {
+			t.Fatal(err)
+		}
+		m := make(map[string]*config.KeyValue)
+		for _, kv := range kvs {
+			m[kv.Key] = kv
+		}
+		if !reflect.DeepEqual(file.Name, m[file.Name].Key) {
+			t.Errorf("m[file.Name].Key is %s", m[file.Name].Key)
+		}
+		if !reflect.DeepEqual(testOriginContent, string(m[file.Name].Value)) {
+			t.Errorf("m[file.Name].Value is %s", m[file.Name].Value)
+		}
+		if !reflect.DeepEqual("yaml", m[file.Name].Format) {
+			t.Errorf("m[file.Name].Format is %s", m[file.Name].Format)
+		}
+	}
+}
diff --git a/contrib/polaris/registry_test.go b/contrib/polaris/registry_test.go
new file mode 100644
index 00000000..327b5a63
--- /dev/null
+++ b/contrib/polaris/registry_test.go
@@ -0,0 +1,164 @@
+package polaris
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/polarismesh/polaris-go"
+
+	"github.com/go-kratos/kratos/v2/registry"
+)
+
+// TestRegistry
+func TestRegistry(t *testing.T) {
+	sdk, err := polaris.NewSDKContextByAddress("127.0.0.1:8091")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p := New(sdk)
+
+	r := p.Registry(
+		WithRegistryTimeout(time.Second),
+		WithRegistryHealthy(true),
+		WithRegistryIsolate(false),
+		WithRegistryRetryCount(3),
+		WithRegistryWeight(100),
+		WithRegistryTTL(1000),
+	)
+
+	ins := &registry.ServiceInstance{
+		ID:      "test-ut-1",
+		Name:    "test-ut-1",
+		Version: "v1.0.0",
+		Endpoints: []string{
+			"grpc://127.0.0.1:8080",
+			"http://127.0.0.1:9090",
+		},
+	}
+
+	err = r.Register(context.Background(), ins)
+
+	t.Cleanup(func() {
+		if err = r.Deregister(context.Background(), ins); err != nil {
+			t.Fatal(err)
+		}
+	})
+
+	if err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(time.Second * 3)
+	service, err := r.GetService(context.Background(), "test-ut-1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Log(service)
+}
+
+func TestWatch(t *testing.T) {
+	sdk, err := polaris.NewSDKContextByAddress("127.0.0.1:8091")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p := New(sdk)
+
+	r := p.Registry(
+		WithRegistryTimeout(time.Second),
+		WithRegistryHealthy(true),
+		WithRegistryIsolate(false),
+		WithRegistryRetryCount(3),
+		WithRegistryWeight(100),
+		WithRegistryTTL(1000),
+	)
+
+	err = r.Register(context.Background(), &registry.ServiceInstance{
+		ID:      "test-ut",
+		Name:    "test-ut",
+		Version: "v1.0.0",
+		Endpoints: []string{
+			"grpc://127.0.0.1:8080",
+			"http://127.0.0.1:9090",
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(time.Second * 3)
+	w, err := r.Watch(context.Background(), "test-ut")
+	if err != nil {
+		t.Fatal(err)
+	}
+	service, err := w.Next()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(service) != 1 {
+		t.Fatalf("want 1, got %d, service %+v", len(service), service)
+	}
+
+	err = r.Register(context.Background(), &registry.ServiceInstance{
+		ID:      "test-ut",
+		Name:    "test-ut",
+		Version: "v1.0.0",
+		Endpoints: []string{
+			"grpc://127.0.0.2:8080",
+			"http://127.0.0.2:9090",
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(time.Second * 3)
+	service, err = w.Next()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(service) != 2 {
+		t.Fatalf("want 1, got %d, service %+v", len(service), service)
+	}
+
+	err = r.Deregister(context.Background(), &registry.ServiceInstance{
+		ID:      "test-ut",
+		Name:    "test-ut",
+		Version: "v1.0.0",
+		Endpoints: []string{
+			"grpc://127.0.0.1:8080",
+			"http://127.0.0.1:9090",
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(time.Second * 3)
+	service, err = w.Next()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(service) != 1 {
+		t.Fatalf("want 1, got %d, service %+v", len(service), service)
+	}
+	err = r.Deregister(context.Background(), &registry.ServiceInstance{
+		ID:      "test-ut",
+		Name:    "test-ut",
+		Version: "v1.0.0",
+		Endpoints: []string{
+			"grpc://127.0.0.2:8080",
+			"http://127.0.0.2:9090",
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(time.Second * 3)
+	service, err = w.Next()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(service) != 0 {
+		t.Fatalf("want 0, got %d", len(service))
+	}
+}
diff --git a/contrib/polaris/router_test.go b/contrib/polaris/router_test.go
new file mode 100644
index 00000000..53552145
--- /dev/null
+++ b/contrib/polaris/router_test.go
@@ -0,0 +1,206 @@
+package polaris
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/polarismesh/polaris-go"
+
+	"github.com/go-kratos/kratos/v2"
+	"github.com/go-kratos/kratos/v2/registry"
+	"github.com/go-kratos/kratos/v2/selector"
+)
+
+func TestRouter(t *testing.T) {
+	token, err := getToken("http://127.0.0.1:8090")
+	if err != nil {
+		t.Fatal(err)
+	}
+	data := `
+[
+   {
+       "name":"kratos",
+       "enable":false,
+       "description":"123",
+       "priority":2,
+       "routing_config":{
+           "@type":"type.googleapis.com/v2.RuleRoutingConfig",
+           "sources":[
+               {
+                   "service":"*",
+                   "namespace":"*",
+                   "arguments":[
+
+                   ]
+               }
+           ],
+           "destinations":[
+               {
+                   "labels":{
+                       "az":{
+                           "value":"1",
+                           "value_type":"TEXT",
+                           "type":"EXACT"
+                       }
+                   },
+                   "weight":100,
+                   "priority":1,
+                   "isolate":false,
+                   "name":"实例分组1",
+                   "namespace":"default",
+                   "service":"test-ut"
+               }
+           ]
+       }
+   }
+]
+`
+	res, err := makeJSONRequest("http://127.0.0.1:8090/naming/v2/routings", data, http.MethodPost, map[string]string{
+		"X-Polaris-Token": token,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	resJSON := struct {
+		Code      int `json:"code"`
+		Responses []struct {
+			Data struct {
+				ID string `json:"id"`
+			}
+		} `json:"responses"`
+	}{}
+
+	err = json.Unmarshal(res, &resJSON)
+	if err != nil {
+		t.Fatal(err, string(res))
+	}
+	if resJSON.Code != 200000 {
+		t.Fatal("create failed", string(res))
+	}
+
+	// enable router
+	enableData := fmt.Sprintf(`[{"id":"%s","enable":true}]`, resJSON.Responses[0].Data.ID)
+	res, err = makeJSONRequest("http://127.0.0.1:8090/naming/v2/routings/enable", enableData, http.MethodPut, map[string]string{
+		"X-Polaris-Token": token,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = json.Unmarshal(res, &resJSON)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if resJSON.Code != 200000 {
+		t.Fatal("enable failed", string(res))
+	}
+
+	t.Cleanup(func() {
+		enableData := fmt.Sprintf(`[{"id":"%s"}]`, resJSON.Responses[0].Data.ID)
+		res, err = makeJSONRequest("http://127.0.0.1:8090/naming/v2/routings/delete", enableData, http.MethodPost, map[string]string{
+			"X-Polaris-Token": token,
+		})
+		resJSON := &commonRes{}
+		err = json.Unmarshal(res, resJSON)
+		if err != nil {
+			t.Fatal(err, string(res))
+		}
+		if resJSON.Code != 200000 {
+			t.Fatal("delete failed", string(res))
+		}
+	})
+
+	sdk, err := polaris.NewSDKContextByAddress("127.0.0.1:8091")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p := New(sdk)
+
+	r := p.Registry(
+		WithRegistryTimeout(time.Second),
+		WithRegistryHealthy(true),
+		WithRegistryIsolate(false),
+		WithRegistryRetryCount(0),
+		WithRegistryWeight(100),
+		WithRegistryTTL(10),
+	)
+
+	ins := &registry.ServiceInstance{
+		ID:      "kratos",
+		Name:    "kratos",
+		Version: "v1.0.0",
+		Endpoints: []string{
+			"grpc://127.0.0.1:8080",
+			"http://127.0.0.1:9090",
+		},
+	}
+
+	err = r.Register(context.Background(), ins)
+	if err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(time.Second * 5)
+	nodes := []selector.Node{
+		selector.NewNode("grpc", "127.0.0.1:9000", &registry.ServiceInstance{
+			ID:        "123",
+			Name:      "test-ut",
+			Version:   "v1.0.0",
+			Metadata:  map[string]string{"weight": "100", "az": "1"},
+			Endpoints: []string{"grpc://127.0.0.1:9000"},
+		}),
+		selector.NewNode("grpc", "127.0.0.2:9000", &registry.ServiceInstance{
+			ID:        "123",
+			Name:      "test-ut",
+			Version:   "v1.0.0",
+			Metadata:  map[string]string{"weight": "100", "az": "2"},
+			Endpoints: []string{"grpc://127.0.0.2:9000"},
+		}),
+		selector.NewNode("grpc", "127.0.0.3:9000", &registry.ServiceInstance{
+			ID:        "123",
+			Name:      "test-ut",
+			Version:   "v1.0.0",
+			Metadata:  map[string]string{"weight": "100", "az": "1"},
+			Endpoints: []string{"grpc://127.0.0.3:9000"},
+		}),
+	}
+
+	f := p.NodeFilter()
+	ctx := kratos.NewContext(context.Background(), &mockApp{})
+	n := f(ctx, nodes)
+	for _, node := range n {
+		if node.Metadata()["az"] != "1" {
+			t.Fatal("node filter result wrong")
+		}
+		t.Log(node)
+	}
+	if len(n) != 2 {
+		t.Fatal("node filter result wrong")
+	}
+}
+
+type mockApp struct{}
+
+func (m mockApp) ID() string {
+	return "1"
+}
+
+func (m mockApp) Name() string {
+	return "kratos"
+}
+
+func (m mockApp) Version() string {
+	return "v2.0.0"
+}
+
+func (m mockApp) Metadata() map[string]string {
+	return map[string]string{}
+}
+
+func (m mockApp) Endpoint() []string {
+	return []string{"grpc://123.123.123.123:9090"}
+}
diff --git a/contrib/registry/polaris/registry_test.go b/contrib/registry/polaris/registry_test.go
deleted file mode 100644
index 7d696064..00000000
--- a/contrib/registry/polaris/registry_test.go
+++ /dev/null
@@ -1,237 +0,0 @@
-package polaris
-
-import (
-	"context"
-	"testing"
-	"time"
-
-	"github.com/go-kratos/kratos/v2/registry"
-
-	"github.com/polarismesh/polaris-go/pkg/config"
-)
-
-// TestRegistry
-func TestRegistry(t *testing.T) {
-	conf := config.NewDefaultConfiguration([]string{"127.0.0.1:8091"})
-
-	r := NewRegistryWithConfig(
-		conf,
-		WithTimeout(time.Second),
-		WithHeartbeat(true),
-		WithHealthy(true),
-		WithIsolate(true),
-		WithNamespace("default"),
-		WithProtocol("tcp"),
-		WithRetryCount(0),
-		WithWeight(100),
-		WithTTL(10),
-	)
-
-	ctx := context.Background()
-
-	svc := &registry.ServiceInstance{
-		Name:      "kratos-provider-0-",
-		Version:   "test",
-		Metadata:  map[string]string{"app": "kratos"},
-		Endpoints: []string{"tcp://127.0.0.1:9000?isSecure=false"},
-	}
-
-	err := r.Register(ctx, svc)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	time.Sleep(time.Second)
-
-	result, err := r.GetService(context.Background(), "kratos-provider-0-tcp")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if len(result) != 1 {
-		t.Fatal("register error")
-	}
-
-	for _, item := range result {
-		if item.Name != "kratos-provider-0-tcp" || item.Endpoints[0] != "tcp://127.0.0.1:9000" {
-			t.Fatal("register error")
-		}
-	}
-
-	watch, err := r.Watch(ctx, "kratos-provider-0-tcp")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	// Test update
-	svc.Version = "release1.0.0"
-
-	if err = r.Register(ctx, svc); err != nil {
-		t.Fatal(err)
-	}
-
-	result, err = watch.Next()
-
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if len(result) != 1 || result[0].Version != "release1.0.0" {
-		t.Fatal("register error")
-	}
-	// Test add instance
-	svc1 := &registry.ServiceInstance{
-		Name:      "kratos-provider-0-",
-		Version:   "test",
-		Metadata:  map[string]string{"app": "kratos"},
-		Endpoints: []string{"tcp://127.0.0.1:9001?isSecure=false"},
-	}
-
-	if err = r.Register(ctx, svc1); err != nil {
-		t.Fatal(err)
-	}
-
-	if _, err = watch.Next(); err != nil {
-		t.Fatal(err)
-	}
-
-	result, err = r.GetService(ctx, "kratos-provider-0-tcp")
-
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if len(result) != 2 {
-		t.Fatal("register error")
-	}
-
-	if err = r.Deregister(ctx, svc); err != nil {
-		t.Fatal(err)
-	}
-	if err = r.Deregister(ctx, svc1); err != nil {
-		t.Fatal(err)
-	}
-
-	result, err = watch.Next()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if len(result) != 0 {
-		t.Fatal("register error")
-	}
-}
-
-// TestRegistryMany
-func TestRegistryMany(t *testing.T) {
-	conf := config.NewDefaultConfiguration([]string{"127.0.0.1:8091"})
-
-	r := NewRegistryWithConfig(
-		conf,
-		WithTimeout(time.Second),
-		WithHeartbeat(true),
-		WithHealthy(true),
-		WithIsolate(true),
-		WithNamespace("default"),
-		WithProtocol("tcp"),
-		WithRetryCount(0),
-		WithWeight(100),
-		WithTTL(10),
-	)
-
-	ctx := context.Background()
-
-	// Multi endpoint
-	svc := &registry.ServiceInstance{
-		Name:      "kratos-provider-1-",
-		Version:   "test",
-		Metadata:  map[string]string{"app": "kratos"},
-		Endpoints: []string{"tcp://127.0.0.1:9000?isSecure=false", "tcp://127.0.0.1:9001?isSecure=false"},
-	}
-	// Normal
-	svc1 := &registry.ServiceInstance{
-		Name:      "kratos-provider-2-",
-		Version:   "test",
-		Metadata:  map[string]string{"app": "kratos"},
-		Endpoints: []string{"tcp://127.0.0.1:9002?isSecure=false"},
-	}
-	// Without metadata
-	svc2 := &registry.ServiceInstance{
-		Name:      "kratos-provider-3-",
-		Version:   "test",
-		Endpoints: []string{"tcp://127.0.0.1:9003?isSecure=false"},
-	}
-
-	if err := r.Register(ctx, svc); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := r.Register(ctx, svc1); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := r.Register(ctx, svc2); err != nil {
-		t.Fatal(err)
-	}
-
-	time.Sleep(3 * time.Second)
-
-	result1, err := r.GetService(ctx, "kratos-provider-1-tcp")
-
-	if err != nil || len(result1) != 2 || result1[0].Name != "kratos-provider-1-tcp" {
-		t.Fatal(err)
-	}
-
-	result2, err := r.GetService(ctx, "kratos-provider-2-tcp")
-
-	if err != nil || len(result2) != 1 || result2[0].Name != "kratos-provider-2-tcp" || result2[0].Endpoints[0] != "tcp://127.0.0.1:9002" {
-		t.Fatal(err)
-	}
-
-	result3, err := r.GetService(ctx, "kratos-provider-3-tcp")
-
-	if err != nil || len(result3) != 1 || result3[0].Name != "kratos-provider-3-tcp" || result3[0].Endpoints[0] != "tcp://127.0.0.1:9003" {
-		t.Fatal(err)
-	}
-
-	watch1, err := r.Watch(ctx, "kratos-provider-1-tcp")
-	if err != nil {
-		t.Fatal(err)
-	}
-	watch2, err := r.Watch(ctx, "kratos-provider-2-tcp")
-	if err != nil {
-		t.Fatal(err)
-	}
-	watch3, err := r.Watch(ctx, "kratos-provider-3-tcp")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if err = r.Deregister(ctx, svc); err != nil {
-		t.Fatal(err)
-	}
-
-	result1, err = watch1.Next()
-	if err != nil || len(result1) != 0 {
-		t.Fatal("deregister error")
-	}
-
-	err = r.Deregister(ctx, svc1)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	result2, err = watch2.Next()
-	if err != nil || len(result2) != 0 {
-		t.Fatal("deregister error")
-	}
-	err = r.Deregister(ctx, svc2)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	result3, err = watch3.Next()
-	if err != nil || len(result3) != 0 {
-		t.Fatal("deregister error")
-	}
-}