Repository: go-kratos/kratos
Pull request #1399 (2021-08-31 07:59:55)

refactor: move plugins to contrib dir

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> Merging [#1399](https://codecov.io/gh/go-kratos/kratos/pull/1399?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) (662fdf9) into [main](https://codecov.io/gh/go-kratos/kratos/commit/a180043076a4c1944b075f71e3aa113c4eb75e13?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) (a180043) will **increase** coverage by `1.26%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/go-kratos/kratos/pull/1399/graphs/tree.svg?width=650&height=150&src=pr&token=XwnmBTz78x&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos)](https://codecov.io/gh/go-kratos/kratos/pull/1399?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos)

```diff
@@            Coverage Diff             @@
##             main    #1399      +/-   ##
==========================================
+ Coverage   66.16%   67.43%   +1.26%     
==========================================
  Files          53       58       +5     
  Lines        2530     2730     +200     
==========================================
+ Hits         1674     1841     +167     
- Misses        710      732      +22     
- Partials      146      157      +11     
```


| [Impacted Files](https://codecov.io/gh/go-kratos/kratos/pull/1399?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) | Coverage Δ | |
|---|---|---|
| [middleware/recovery/recovery.go](https://codecov.io/gh/go-kratos/kratos/pull/1399/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-bWlkZGxld2FyZS9yZWNvdmVyeS9yZWNvdmVyeS5nbw==) | `100.00% <0.00%> (ø)` | |
| [middleware/metadata/metadata.go](https://codecov.io/gh/go-kratos/kratos/pull/1399/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-bWlkZGxld2FyZS9tZXRhZGF0YS9tZXRhZGF0YS5nbw==) | `93.47% <0.00%> (ø)` | |
| [middleware/metrics/metrics.go](https://codecov.io/gh/go-kratos/kratos/pull/1399/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-bWlkZGxld2FyZS9tZXRyaWNzL21ldHJpY3MuZ28=) | `46.42% <0.00%> (ø)` | |
| [middleware/logging/logging.go](https://codecov.io/gh/go-kratos/kratos/pull/1399/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-bWlkZGxld2FyZS9sb2dnaW5nL2xvZ2dpbmcuZ28=) | `96.96% <0.00%> (ø)` | |
| [middleware/validate/validate.go](https://codecov.io/gh/go-kratos/kratos/pull/1399/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-bWlkZGxld2FyZS92YWxpZGF0ZS92YWxpZGF0ZS5nbw==) | `100.00% <0.00%> (ø)` | |
| [internal/context/context.go](https://codecov.io/gh/go-kratos/kratos/pull/1399/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-aW50ZXJuYWwvY29udGV4dC9jb250ZXh0Lmdv) | `100.00% <0.00%> (+2.98%)` | :arrow_up: |

------

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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/go-kratos/kratos/pull/1399?src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos). Last update [a180043...662fdf9](https://codecov.io/gh/go-kratos/kratos/pull/1399?src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos).

Windfarer: ref #1386 
shenqidebaozi: example 示例貌似没改？
shenqidebaozi: 另外刚才想了下，要不把 ../kratos 去掉吧。

Patch:
diff --git a/config/apollo/go.mod b/config/apollo/go.mod
deleted file mode 100644
index be02c28f..00000000
--- a/config/apollo/go.mod
+++ /dev/null
@@ -1,10 +0,0 @@
-module github.com/go-kratos/kratos/config/apollo/v2
-
-require (
-	github.com/apolloconfig/agollo/v4 v4.0.8
-	github.com/go-kratos/kratos/v2 v2.0.4
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
-
-go 1.15
diff --git a/config/kubernetes/go.mod b/config/kubernetes/go.mod
deleted file mode 100644
index 4ba96ab7..00000000
--- a/config/kubernetes/go.mod
+++ /dev/null
@@ -1,12 +0,0 @@
-module github.com/go-kratos/kratos/config/kubernetes/v2
-
-go 1.15
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.0-rc3
-	k8s.io/api v0.21.1
-	k8s.io/apimachinery v0.21.1
-	k8s.io/client-go v0.21.1
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/config/apollo/apollo.go b/contrib/config/apollo/apollo.go
similarity index 93%
rename from config/apollo/apollo.go
rename to contrib/config/apollo/apollo.go
index 25c20ff8..b73f60c9 100644
--- a/config/apollo/apollo.go
+++ b/contrib/config/apollo/apollo.go
@@ -23,7 +23,7 @@ func NewSource() config.Source {
 }
 
 func (e *apollo) load() []*config.KeyValue {
-	kv := make([]*config.KeyValue,e.client.GetDefaultConfigCache().EntryCount())
+	kv := make([]*config.KeyValue, e.client.GetDefaultConfigCache().EntryCount())
 	e.client.GetDefaultConfigCache().Range(func(key, value interface{}) bool {
 		kv = append(kv, &config.KeyValue{
 			Key:   key.(string),
@@ -44,4 +44,4 @@ func (e *apollo) Watch() (config.Watcher, error) {
 		return nil, err
 	}
 	return w, nil
-}
\ No newline at end of file
+}
diff --git a/contrib/config/apollo/go.mod b/contrib/config/apollo/go.mod
new file mode 100644
index 00000000..50062dbb
--- /dev/null
+++ b/contrib/config/apollo/go.mod
@@ -0,0 +1,10 @@
+module github.com/go-kratos/kratos/contrib/config/apollo/v2
+
+go 1.15
+
+require (
+	github.com/apolloconfig/agollo/v4 v4.0.8
+	github.com/go-kratos/kratos/v2 v2.0.0
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../
diff --git a/config/apollo/go.sum b/contrib/config/apollo/go.sum
similarity index 97%
rename from config/apollo/go.sum
rename to contrib/config/apollo/go.sum
index 64315fdd..82e09ff0 100644
--- a/config/apollo/go.sum
+++ b/contrib/config/apollo/go.sum
@@ -47,7 +47,6 @@ github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymF
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
@@ -90,9 +89,8 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
-github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
 github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
@@ -222,12 +220,6 @@ github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
-go.opentelemetry.io/otel v1.0.0-RC1 h1:4CeoX93DNTWt8awGK9JmNXzF9j7TyOu9upscEdtcdXc=
-go.opentelemetry.io/otel v1.0.0-RC1/go.mod h1:x9tRa9HK4hSSq7jf2TKbqFbtt58/TGk0f9XiEYISI1I=
-go.opentelemetry.io/otel/oteltest v1.0.0-RC1/go.mod h1:+eoIG0gdEOaPNftuy1YScLr1Gb4mL/9lpDkZ0JjMRq4=
-go.opentelemetry.io/otel/sdk v1.0.0-RC1/go.mod h1:kj6yPn7Pgt5ByRuwesbaWcRLA+V7BSDg3Hf8xRvsvf8=
-go.opentelemetry.io/otel/trace v1.0.0-RC1 h1:jrjqKJZEibFrDz+umEASeU3LvdVyWKlnTh7XEfwrT58=
-go.opentelemetry.io/otel/trace v1.0.0-RC1/go.mod h1:86UHmyHWFEtWjfWPSbu0+d0Pf9Q6e1U+3ViBOc+NXAg=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
@@ -334,7 +326,7 @@ golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 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 v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 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=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -360,7 +352,7 @@ google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBr
 google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 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 v0.0.0-20210629200056-84d6f6074151/go.mod h1:yiaVoXHpRzHGyxV3o4DktVWY4mSUErTKaeEOq6C3t3U=
+google.golang.org/genproto v0.0.0-20210805201207-89edb61ffb67/go.mod h1:ob2IJxKrgPT52GcgX759i1sleT07tiKowYBGbczaW48=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
@@ -369,8 +361,8 @@ google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQ
 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 v1.39.0/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
+google.golang.org/grpc v1.39.1/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
diff --git a/config/apollo/watcher.go b/contrib/config/apollo/watcher.go
similarity index 94%
rename from config/apollo/watcher.go
rename to contrib/config/apollo/watcher.go
index 140ea631..33463518 100644
--- a/config/apollo/watcher.go
+++ b/contrib/config/apollo/watcher.go
@@ -18,7 +18,7 @@ func (c *customChangeListener) OnChange(changeEvent *storage.ChangeEvent) {
 }
 
 func (c *customChangeListener) OnNewestChange(changeEvent *storage.FullChangeEvent) {
-	kv := make([]*config.KeyValue,len(changeEvent.Changes))
+	kv := make([]*config.KeyValue, len(changeEvent.Changes))
 	for key, value := range changeEvent.Changes {
 		kv = append(kv, &config.KeyValue{
 			Key:   key,
diff --git a/config/kubernetes/README.md b/contrib/config/kubernetes/README.md
similarity index 100%
rename from config/kubernetes/README.md
rename to contrib/config/kubernetes/README.md
diff --git a/config/kubernetes/config.go b/contrib/config/kubernetes/config.go
similarity index 98%
rename from config/kubernetes/config.go
rename to contrib/config/kubernetes/config.go
index 1daaaea9..2e66fbc7 100644
--- a/config/kubernetes/config.go
+++ b/contrib/config/kubernetes/config.go
@@ -71,12 +71,12 @@ type kube struct {
 
 // NewSource new a kubernetes config source.
 func NewSource(opts ...Option) config.Source {
-	options := options{}
+	op := options{}
 	for _, o := range opts {
-		o(&options)
+		o(&op)
 	}
 	return &kube{
-		opts: options,
+		opts: op,
 	}
 }
 
diff --git a/config/kubernetes/config_test.go b/contrib/config/kubernetes/config_test.go
similarity index 100%
rename from config/kubernetes/config_test.go
rename to contrib/config/kubernetes/config_test.go
diff --git a/config/kubernetes/example.go b/contrib/config/kubernetes/example.go
similarity index 100%
rename from config/kubernetes/example.go
rename to contrib/config/kubernetes/example.go
diff --git a/contrib/config/kubernetes/go.mod b/contrib/config/kubernetes/go.mod
new file mode 100644
index 00000000..b4612a1e
--- /dev/null
+++ b/contrib/config/kubernetes/go.mod
@@ -0,0 +1,12 @@
+module github.com/go-kratos/kratos/contrib/config/kubernetes/v2
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.0
+	k8s.io/api v0.21.1
+	k8s.io/apimachinery v0.21.1
+	k8s.io/client-go v0.21.1
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../
diff --git a/config/kubernetes/go.sum b/contrib/config/kubernetes/go.sum
similarity index 99%
rename from config/kubernetes/go.sum
rename to contrib/config/kubernetes/go.sum
index 81eb4f3b..36237bcb 100644
--- a/config/kubernetes/go.sum
+++ b/contrib/config/kubernetes/go.sum
@@ -111,6 +111,7 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
 github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -143,6 +144,7 @@ github.com/imdario/mergo v0.3.5/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJ
 github.com/imdario/mergo v0.3.12 h1:b6R2BslTbIEToALKP7LxUvijTsNI9TAe80pLWN2g/HU=
 github.com/imdario/mergo v0.3.12/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
+github.com/json-iterator/go v1.1.10 h1:Kz6Cvnvv2wGdaG/V8yMvfkmNiXq9Ya2KUv4rouJJr68=
 github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/json-iterator/go v1.1.11 h1:uVUAXhF2To8cbw/3xN3pxj6kk7TYKs98NIrTqPlMWAQ=
 github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
@@ -272,6 +274,7 @@ golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210224082022-3d97a244fca7/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d h1:20cMwl2fHAzkJMEA+8J4JgqBQcQGzbisXo31MIeenXI=
 golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
@@ -318,6 +321,7 @@ golang.org/x/sys v0.0.0-20210225134936-a50acf3fe073/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/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 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 h1:siQdpVirKtzPhKl3lZWozZraCFObP8S1v6PRp0bLrtU=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -331,6 +335,7 @@ golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3
 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 v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
diff --git a/config/kubernetes/watcher.go b/contrib/config/kubernetes/watcher.go
similarity index 100%
rename from config/kubernetes/watcher.go
rename to contrib/config/kubernetes/watcher.go
diff --git a/config/kubernetes/watcher_test.go b/contrib/config/kubernetes/watcher_test.go
similarity index 100%
rename from config/kubernetes/watcher_test.go
rename to contrib/config/kubernetes/watcher_test.go
diff --git a/contrib/metrics/README.md b/contrib/metrics/README.md
new file mode 100644
index 00000000..e69de29b
diff --git a/metrics/prometheus/README.md b/contrib/metrics/prometheus/README.md
similarity index 100%
rename from metrics/prometheus/README.md
rename to contrib/metrics/prometheus/README.md
diff --git a/metrics/prometheus/metrics/counter.go b/contrib/metrics/prometheus/counter.go
similarity index 97%
rename from metrics/prometheus/metrics/counter.go
rename to contrib/metrics/prometheus/counter.go
index c5e468a0..8b90beab 100644
--- a/metrics/prometheus/metrics/counter.go
+++ b/contrib/metrics/prometheus/counter.go
@@ -1,4 +1,4 @@
-package metrics
+package prometheus
 
 import (
 	"github.com/go-kratos/kratos/v2/metrics"
diff --git a/metrics/prometheus/metrics/gauge.go b/contrib/metrics/prometheus/gauge.go
similarity index 97%
rename from metrics/prometheus/metrics/gauge.go
rename to contrib/metrics/prometheus/gauge.go
index 3f1b4641..6df11d69 100644
--- a/metrics/prometheus/metrics/gauge.go
+++ b/contrib/metrics/prometheus/gauge.go
@@ -1,4 +1,4 @@
-package metrics
+package prometheus
 
 import (
 	"github.com/go-kratos/kratos/v2/metrics"
diff --git a/contrib/metrics/prometheus/go.mod b/contrib/metrics/prometheus/go.mod
new file mode 100644
index 00000000..6f53a170
--- /dev/null
+++ b/contrib/metrics/prometheus/go.mod
@@ -0,0 +1,10 @@
+module github.com/go-kratos/kratos/contrib/prometheus/prometric/v2
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.0
+	github.com/prometheus/client_golang v1.9.0
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../
diff --git a/metrics/prometheus/go.sum b/contrib/metrics/prometheus/go.sum
similarity index 99%
rename from metrics/prometheus/go.sum
rename to contrib/metrics/prometheus/go.sum
index 624ed700..cf342824 100644
--- a/metrics/prometheus/go.sum
+++ b/contrib/metrics/prometheus/go.sum
@@ -371,6 +371,7 @@ golang.org/x/sys v0.0.0-20201214210602-f9fddec55a1e/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/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 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 h1:siQdpVirKtzPhKl3lZWozZraCFObP8S1v6PRp0bLrtU=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
diff --git a/metrics/prometheus/metrics/histogram.go b/contrib/metrics/prometheus/histogram.go
similarity index 96%
rename from metrics/prometheus/metrics/histogram.go
rename to contrib/metrics/prometheus/histogram.go
index 1ccc4328..81b3b281 100644
--- a/metrics/prometheus/metrics/histogram.go
+++ b/contrib/metrics/prometheus/histogram.go
@@ -1,4 +1,4 @@
-package metrics
+package prometheus
 
 import (
 	"github.com/go-kratos/kratos/v2/metrics"
diff --git a/metrics/prometheus/metrics/summary.go b/contrib/metrics/prometheus/summary.go
similarity index 96%
rename from metrics/prometheus/metrics/summary.go
rename to contrib/metrics/prometheus/summary.go
index f07a4181..d8bcad91 100644
--- a/metrics/prometheus/metrics/summary.go
+++ b/contrib/metrics/prometheus/summary.go
@@ -1,4 +1,4 @@
-package metrics
+package prometheus
 
 import (
 	"github.com/go-kratos/kratos/v2/metrics"
diff --git a/registry/consul/client.go b/contrib/registry/consul/client.go
similarity index 99%
rename from registry/consul/client.go
rename to contrib/registry/consul/client.go
index caed5476..aec2b5fa 100644
--- a/registry/consul/client.go
+++ b/contrib/registry/consul/client.go
@@ -1,4 +1,4 @@
-package registry
+package consul
 
 import (
 	"context"
diff --git a/contrib/registry/consul/go.mod b/contrib/registry/consul/go.mod
new file mode 100644
index 00000000..ea897990
--- /dev/null
+++ b/contrib/registry/consul/go.mod
@@ -0,0 +1,11 @@
+module github.com/go-kratos/kratos/contrib/registry/consul/v2
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.0
+	github.com/hashicorp/consul/api v1.9.1
+	github.com/stretchr/testify v1.7.0
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../
diff --git a/registry/consul/go.sum b/contrib/registry/consul/go.sum
similarity index 99%
rename from registry/consul/go.sum
rename to contrib/registry/consul/go.sum
index c544f3a7..db0dca23 100644
--- a/registry/consul/go.sum
+++ b/contrib/registry/consul/go.sum
@@ -197,6 +197,7 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/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 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 h1:siQdpVirKtzPhKl3lZWozZraCFObP8S1v6PRp0bLrtU=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
diff --git a/registry/consul/registry.go b/contrib/registry/consul/registry.go
similarity index 99%
rename from registry/consul/registry.go
rename to contrib/registry/consul/registry.go
index be828ecb..f3c87abd 100644
--- a/registry/consul/registry.go
+++ b/contrib/registry/consul/registry.go
@@ -1,4 +1,4 @@
-package registry
+package consul
 
 import (
 	"context"
diff --git a/registry/consul/service.go b/contrib/registry/consul/service.go
similarity index 96%
rename from registry/consul/service.go
rename to contrib/registry/consul/service.go
index b502ccac..a0a16609 100644
--- a/registry/consul/service.go
+++ b/contrib/registry/consul/service.go
@@ -1,4 +1,4 @@
-package registry
+package consul
 
 import (
 	"sync"
diff --git a/registry/consul/watcher.go b/contrib/registry/consul/watcher.go
similarity index 97%
rename from registry/consul/watcher.go
rename to contrib/registry/consul/watcher.go
index 91cbc69f..33693da7 100644
--- a/registry/consul/watcher.go
+++ b/contrib/registry/consul/watcher.go
@@ -1,4 +1,4 @@
-package registry
+package consul
 
 import (
 	"context"
diff --git a/contrib/registry/etcd/go.mod b/contrib/registry/etcd/go.mod
new file mode 100644
index 00000000..63059c3e
--- /dev/null
+++ b/contrib/registry/etcd/go.mod
@@ -0,0 +1,11 @@
+module github.com/go-kratos/kratos/contrib/registry/etcd/v2
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.0
+	go.etcd.io/etcd/client/v3 v3.5.0
+	google.golang.org/grpc v1.40.0
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../
diff --git a/registry/etcd/go.sum b/contrib/registry/etcd/go.sum
similarity index 99%
rename from registry/etcd/go.sum
rename to contrib/registry/etcd/go.sum
index dd1c1c1c..ce4a23dc 100644
--- a/registry/etcd/go.sum
+++ b/contrib/registry/etcd/go.sum
@@ -185,6 +185,7 @@ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d h1:20cMwl2fHAzkJMEA+8J4JgqBQcQGzbisXo31MIeenXI=
 golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
@@ -225,6 +226,7 @@ golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9sn
 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 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
diff --git a/registry/etcd/registry.go b/contrib/registry/etcd/registry.go
similarity index 98%
rename from registry/etcd/registry.go
rename to contrib/registry/etcd/registry.go
index 50f07cac..db593e59 100644
--- a/registry/etcd/registry.go
+++ b/contrib/registry/etcd/registry.go
@@ -1,4 +1,4 @@
-package registry
+package etcd
 
 import (
 	"context"
@@ -54,17 +54,17 @@ type Registry struct {
 
 // New creates etcd registry
 func New(client *clientv3.Client, opts ...Option) (r *Registry) {
-	options := &options{
+	op := &options{
 		ctx:       context.Background(),
 		namespace: "/microservices",
 		ttl:       time.Second * 15,
 		maxRetry:  5,
 	}
 	for _, o := range opts {
-		o(options)
+		o(op)
 	}
 	return &Registry{
-		opts:   options,
+		opts:   op,
 		client: client,
 		kv:     clientv3.NewKV(client),
 	}
diff --git a/registry/etcd/service.go b/contrib/registry/etcd/service.go
similarity index 95%
rename from registry/etcd/service.go
rename to contrib/registry/etcd/service.go
index 63650633..e6aa851c 100644
--- a/registry/etcd/service.go
+++ b/contrib/registry/etcd/service.go
@@ -1,4 +1,4 @@
-package registry
+package etcd
 
 import (
 	"encoding/json"
diff --git a/registry/etcd/watcher.go b/contrib/registry/etcd/watcher.go
similarity index 98%
rename from registry/etcd/watcher.go
rename to contrib/registry/etcd/watcher.go
index 8e85f047..aa6562b1 100644
--- a/registry/etcd/watcher.go
+++ b/contrib/registry/etcd/watcher.go
@@ -1,4 +1,4 @@
-package registry
+package etcd
 
 import (
 	"context"
@@ -18,7 +18,7 @@ type watcher struct {
 	watchChan clientv3.WatchChan
 	watcher   clientv3.Watcher
 	kv        clientv3.KV
-	first bool
+	first     bool
 }
 
 func newWatcher(ctx context.Context, key string, client *clientv3.Client) *watcher {
diff --git a/contrib/registry/kubernetes/go.mod b/contrib/registry/kubernetes/go.mod
new file mode 100644
index 00000000..98631db6
--- /dev/null
+++ b/contrib/registry/kubernetes/go.mod
@@ -0,0 +1,13 @@
+module github.com/go-kratos/kratos/contrib/registry/kubernetes/v2
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.0
+	github.com/json-iterator/go v1.1.11
+	k8s.io/api v0.22.1
+	k8s.io/apimachinery v0.22.1
+	k8s.io/client-go v0.22.1
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../
diff --git a/registry/kubernetes/go.sum b/contrib/registry/kubernetes/go.sum
similarity index 99%
rename from registry/kubernetes/go.sum
rename to contrib/registry/kubernetes/go.sum
index 485c5ba8..9e37e403 100644
--- a/registry/kubernetes/go.sum
+++ b/contrib/registry/kubernetes/go.sum
@@ -111,6 +111,7 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
 github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -270,6 +271,7 @@ golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.0.0-20210520170846-37e1c6afe023 h1:ADo5wSpq2gqaCGQWzk7S5vd//0iyyLeAratkEoG5dLE=
 golang.org/x/net v0.0.0-20210520170846-37e1c6afe023/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d h1:20cMwl2fHAzkJMEA+8J4JgqBQcQGzbisXo31MIeenXI=
 golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
@@ -318,6 +320,7 @@ golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7w
 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 v0.0.0-20210616094352-59db8d763f22 h1:RqytpXGR1iVNX7psjB3ff8y7sNFinVFvkx1c8SjBkio=
 golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 h1:siQdpVirKtzPhKl3lZWozZraCFObP8S1v6PRp0bLrtU=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
diff --git a/registry/kubernetes/registry.go b/contrib/registry/kubernetes/registry.go
similarity index 99%
rename from registry/kubernetes/registry.go
rename to contrib/registry/kubernetes/registry.go
index 329f3bf1..46117bbc 100644
--- a/registry/kubernetes/registry.go
+++ b/contrib/registry/kubernetes/registry.go
@@ -1,5 +1,5 @@
 // The package registry simply implements the Kubernetes-based Registry
-package kubernetes
+package kuberegistry
 
 import (
 	"context"
diff --git a/contrib/registry/nacos/go.mod b/contrib/registry/nacos/go.mod
new file mode 100644
index 00000000..e11e455b
--- /dev/null
+++ b/contrib/registry/nacos/go.mod
@@ -0,0 +1,10 @@
+module github.com/go-kratos/kratos/contrib/registry/nacos/v2
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.0
+	github.com/nacos-group/nacos-sdk-go v1.0.8
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../
diff --git a/registry/nacos/go.sum b/contrib/registry/nacos/go.sum
similarity index 100%
rename from registry/nacos/go.sum
rename to contrib/registry/nacos/go.sum
diff --git a/registry/nacos/registry.go b/contrib/registry/nacos/registry.go
similarity index 98%
rename from registry/nacos/registry.go
rename to contrib/registry/nacos/registry.go
index 3cccb305..f36e4c2f 100644
--- a/registry/nacos/registry.go
+++ b/contrib/registry/nacos/registry.go
@@ -1,4 +1,4 @@
-package registry
+package nacos
 
 import (
 	"context"
@@ -55,17 +55,17 @@ type Registry struct {
 
 // New new a nacos registry.
 func New(cli naming_client.INamingClient, opts ...Option) (r *Registry) {
-	options := options{
+	op := options{
 		prefix:  "/microservices",
 		cluster: "DEFAULT",
 		group:   "DEFAULT_GROUP",
 		weight:  100,
 	}
 	for _, option := range opts {
-		option(&options)
+		option(&op)
 	}
 	return &Registry{
-		opts: options,
+		opts: op,
 		cli:  cli,
 	}
 }
diff --git a/registry/nacos/watcher.go b/contrib/registry/nacos/watcher.go
similarity index 99%
rename from registry/nacos/watcher.go
rename to contrib/registry/nacos/watcher.go
index 212a6ae4..9696a864 100644
--- a/registry/nacos/watcher.go
+++ b/contrib/registry/nacos/watcher.go
@@ -1,4 +1,4 @@
-package registry
+package nacos
 
 import (
 	"context"
diff --git a/contrib/registry/zookeeper/go.mod b/contrib/registry/zookeeper/go.mod
new file mode 100644
index 00000000..f8cdaa20
--- /dev/null
+++ b/contrib/registry/zookeeper/go.mod
@@ -0,0 +1,10 @@
+module github.com/go-kratos/kratos/contrib/registry/zookeeper/v2
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.0
+	github.com/go-zookeeper/zk v1.0.2
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../
diff --git a/registry/zookeeper/go.sum b/contrib/registry/zookeeper/go.sum
similarity index 100%
rename from registry/zookeeper/go.sum
rename to contrib/registry/zookeeper/go.sum
diff --git a/registry/zookeeper/register.go b/contrib/registry/zookeeper/register.go
similarity index 99%
rename from registry/zookeeper/register.go
rename to contrib/registry/zookeeper/register.go
index 58e01d13..22062bb0 100644
--- a/registry/zookeeper/register.go
+++ b/contrib/registry/zookeeper/register.go
@@ -1,4 +1,4 @@
-package registry
+package zookeeper
 
 import (
 	"context"
diff --git a/registry/zookeeper/service.go b/contrib/registry/zookeeper/service.go
similarity index 96%
rename from registry/zookeeper/service.go
rename to contrib/registry/zookeeper/service.go
index b502ccac..59eb7a13 100644
--- a/registry/zookeeper/service.go
+++ b/contrib/registry/zookeeper/service.go
@@ -1,4 +1,4 @@
-package registry
+package zookeeper
 
 import (
 	"sync"
diff --git a/registry/zookeeper/watcher.go b/contrib/registry/zookeeper/watcher.go
similarity index 97%
rename from registry/zookeeper/watcher.go
rename to contrib/registry/zookeeper/watcher.go
index 62dcab88..9430e9ce 100644
--- a/registry/zookeeper/watcher.go
+++ b/contrib/registry/zookeeper/watcher.go
@@ -1,4 +1,4 @@
-package registry
+package zookeeper
 
 import (
 	"context"
diff --git a/examples/blog/cmd/blog/main.go b/examples/blog/cmd/blog/main.go
index 1f553138..bb127488 100644
--- a/examples/blog/cmd/blog/main.go
+++ b/examples/blog/cmd/blog/main.go
@@ -1,12 +1,9 @@
 package main
 
 import (
-	"context"
 	"flag"
 	"os"
-	"time"
 
-	v1 "github.com/go-kratos/kratos/examples/blog/api/blog/v1"
 	"github.com/go-kratos/kratos/examples/blog/internal/conf"
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/config"
@@ -14,6 +11,7 @@ import (
 	"github.com/go-kratos/kratos/v2/log"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
+	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/exporters/jaeger"
 	"go.opentelemetry.io/otel/sdk/resource"
@@ -48,23 +46,26 @@ func newApp(logger log.Logger, hs *http.Server, gs *grpc.Server) *kratos.App {
 	)
 }
 
-func tracerProvider(url string) (*tracesdk.TracerProvider, error) {
+// Set global trace provider
+func setTracerProvider(url string) error {
 	// Create the Jaeger exporter
 	exp, err := jaeger.New(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(url)))
 	if err != nil {
-		return nil, err
+		return err
 	}
 	tp := tracesdk.NewTracerProvider(
+		// Set the sampling rate based on the parent span to 100%
+		tracesdk.WithSampler(tracesdk.ParentBased(tracesdk.TraceIDRatioBased(1.0))),
 		// Always be sure to batch in production.
 		tracesdk.WithBatcher(exp),
 		// Record information about this application in an Resource.
 		tracesdk.WithResource(resource.NewSchemaless(
-			semconv.ServiceNameKey.String(v1.BlogService_ServiceDesc.ServiceName),
-			attribute.String("environment", "development"),
-			attribute.Int64("ID", 1),
+			semconv.ServiceNameKey.String(Name),
+			attribute.String("env", "dev"),
 		)),
 	)
-	return tp, nil
+	otel.SetTracerProvider(tp)
+	return nil
 }
 
 func main() {
@@ -84,23 +85,12 @@ func main() {
 	if err := cfg.Scan(&bc); err != nil {
 		panic(err)
 	}
-	tp, err := tracerProvider(bc.Trace.Endpoint)
-	if err != nil {
+
+	if err := setTracerProvider(bc.Trace.Endpoint); err != nil {
 		panic(err)
 	}
 
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-	defer func(ctx context.Context) {
-		// Do not make the application hang when it is shutdown.
-		ctx, cancel = context.WithTimeout(ctx, time.Second*5)
-		defer cancel()
-		if err := tp.Shutdown(ctx); err != nil {
-			panic(err)
-		}
-	}(ctx)
-
-	app, cleanup, err := initApp(bc.Server, bc.Data, tp, logger)
+	app, cleanup, err := initApp(bc.Server, bc.Data, logger)
 	if err != nil {
 		panic(err)
 	}
diff --git a/examples/blog/cmd/blog/wire.go b/examples/blog/cmd/blog/wire.go
index de51b789..2d3db884 100644
--- a/examples/blog/cmd/blog/wire.go
+++ b/examples/blog/cmd/blog/wire.go
@@ -13,10 +13,9 @@ import (
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/log"
 	"github.com/google/wire"
-	"go.opentelemetry.io/otel/trace"
 )
 
 // initApp init kratos application.
-func initApp(*conf.Server, *conf.Data, trace.TracerProvider, log.Logger) (*kratos.App, func(), error) {
+func initApp(*conf.Server, *conf.Data, log.Logger) (*kratos.App, func(), error) {
 	panic(wire.Build(server.ProviderSet, data.ProviderSet, biz.ProviderSet, service.ProviderSet, newApp))
 }
diff --git a/examples/blog/cmd/blog/wire_gen.go b/examples/blog/cmd/blog/wire_gen.go
index c5b8eada..118c1296 100644
--- a/examples/blog/cmd/blog/wire_gen.go
+++ b/examples/blog/cmd/blog/wire_gen.go
@@ -13,13 +13,12 @@ import (
 	"github.com/go-kratos/kratos/examples/blog/internal/service"
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/log"
-	"go.opentelemetry.io/otel/trace"
 )
 
 // Injectors from wire.go:
 
 // initApp init kratos application.
-func initApp(confServer *conf.Server, confData *conf.Data, traceTracerProvider trace.TracerProvider, logger log.Logger) (*kratos.App, func(), error) {
+func initApp(confServer *conf.Server, confData *conf.Data, logger log.Logger) (*kratos.App, func(), error) {
 	dataData, cleanup, err := data.NewData(confData, logger)
 	if err != nil {
 		return nil, nil, err
@@ -27,8 +26,8 @@ func initApp(confServer *conf.Server, confData *conf.Data, traceTracerProvider t
 	articleRepo := data.NewArticleRepo(dataData, logger)
 	articleUsecase := biz.NewArticleUsecase(articleRepo, logger)
 	blogService := service.NewBlogService(articleUsecase, logger)
-	httpServer := server.NewHTTPServer(confServer, logger, traceTracerProvider, blogService)
-	grpcServer := server.NewGRPCServer(confServer, logger, traceTracerProvider, blogService)
+	httpServer := server.NewHTTPServer(confServer, logger, blogService)
+	grpcServer := server.NewGRPCServer(confServer, logger, blogService)
 	app := newApp(logger, httpServer, grpcServer)
 	return app, func() {
 		cleanup()
diff --git a/examples/blog/internal/server/grpc.go b/examples/blog/internal/server/grpc.go
index 5d58c65b..6b14380d 100644
--- a/examples/blog/internal/server/grpc.go
+++ b/examples/blog/internal/server/grpc.go
@@ -5,20 +5,19 @@ import (
 	"github.com/go-kratos/kratos/examples/blog/internal/conf"
 	"github.com/go-kratos/kratos/examples/blog/internal/service"
 	"github.com/go-kratos/kratos/v2/log"
-	"github.com/go-kratos/kratos/middleware/logging/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
-	"github.com/go-kratos/kratos/middleware/tracing/v2"
-	"github.com/go-kratos/kratos/middleware/validate/v2"
+	"github.com/go-kratos/kratos/v2/middleware/logging"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
+	"github.com/go-kratos/kratos/v2/middleware/tracing"
+	"github.com/go-kratos/kratos/v2/middleware/validate"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
-	"go.opentelemetry.io/otel/trace"
 )
 
 // NewGRPCServer new a gRPC server.
-func NewGRPCServer(c *conf.Server, logger log.Logger, tracer trace.TracerProvider, blog *service.BlogService) *grpc.Server {
+func NewGRPCServer(c *conf.Server, logger log.Logger, blog *service.BlogService) *grpc.Server {
 	var opts = []grpc.ServerOption{
 		grpc.Middleware(
 			recovery.Recovery(),
-			tracing.Server(tracing.WithTracerProvider(tracer)),
+			tracing.Server(),
 			logging.Server(logger),
 			validate.Validator(),
 		),
diff --git a/examples/blog/internal/server/http.go b/examples/blog/internal/server/http.go
index 2784b8e3..340713fd 100644
--- a/examples/blog/internal/server/http.go
+++ b/examples/blog/internal/server/http.go
@@ -5,20 +5,19 @@ import (
 	"github.com/go-kratos/kratos/examples/blog/internal/conf"
 	"github.com/go-kratos/kratos/examples/blog/internal/service"
 	"github.com/go-kratos/kratos/v2/log"
-	"github.com/go-kratos/kratos/middleware/logging/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
-	"github.com/go-kratos/kratos/middleware/tracing/v2"
-	"github.com/go-kratos/kratos/middleware/validate/v2"
+	"github.com/go-kratos/kratos/v2/middleware/logging"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
+	"github.com/go-kratos/kratos/v2/middleware/tracing"
+	"github.com/go-kratos/kratos/v2/middleware/validate"
 	"github.com/go-kratos/kratos/v2/transport/http"
-	"go.opentelemetry.io/otel/trace"
 )
 
 // NewHTTPServer new a HTTP server.
-func NewHTTPServer(c *conf.Server, logger log.Logger, tracer trace.TracerProvider, blog *service.BlogService) *http.Server {
+func NewHTTPServer(c *conf.Server, logger log.Logger, blog *service.BlogService) *http.Server {
 	var opts = []http.ServerOption{
 		http.Middleware(
 			recovery.Recovery(),
-			tracing.Server(tracing.WithTracerProvider(tracer)),
+			tracing.Server(),
 			logging.Server(logger),
 			validate.Validator(),
 		),
diff --git a/examples/go.mod b/examples/go.mod
index 597f5ad4..8de7ae9f 100644
--- a/examples/go.mod
+++ b/examples/go.mod
@@ -5,28 +5,16 @@ go 1.16
 require (
 	entgo.io/ent v0.9.0
 	github.com/BurntSushi/toml v0.3.1
-	github.com/aliyun/alibaba-cloud-sdk-go v1.61.1110 // indirect
-	github.com/buger/jsonparser v1.1.1 // indirect
 	github.com/envoyproxy/protoc-gen-validate v0.6.1
 	github.com/gin-gonic/gin v1.7.3
-	github.com/go-errors/errors v1.4.0 // indirect
-	github.com/go-kratos/consul v0.1.4
-	github.com/go-kratos/etcd v0.1.3
 	github.com/go-kratos/gin v0.1.0
-	github.com/go-kratos/kratos/middleware/logging/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/middleware/metadata/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/middleware/metrics/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/middleware/recovery/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/middleware/tracing/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/middleware/validate/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/registry/consul/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/registry/etcd/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/registry/nacos/v2 v2.0.0-00010101000000-000000000000
-	github.com/go-kratos/kratos/registry/zookeeper/v2 v2.0.0-00010101000000-000000000000
+	github.com/go-kratos/kratos/contrib/metrics/prometheus/v2 v2.0.0-00010101000000-000000000000
+	github.com/go-kratos/kratos/contrib/registry/consul/v2 v2.0.0-00010101000000-000000000000
+	github.com/go-kratos/kratos/contrib/registry/etcd/v2 v2.0.0-00010101000000-000000000000
+	github.com/go-kratos/kratos/contrib/registry/nacos/v2 v2.0.0-00010101000000-000000000000
+	github.com/go-kratos/kratos/contrib/registry/zookeeper/v2 v2.0.0-00010101000000-000000000000
 	github.com/go-kratos/kratos/v2 v2.0.5
-	github.com/go-kratos/prometheus v0.0.0-20210522055322-137e29e7cf47
 	github.com/go-kratos/swagger-api v1.0.0
-	github.com/go-playground/validator/v10 v10.6.1 // indirect
 	github.com/go-redis/redis/extra/redisotel v0.3.0
 	github.com/go-redis/redis/v8 v8.11.2
 	github.com/go-sql-driver/mysql v1.6.0
@@ -36,43 +24,30 @@ require (
 	github.com/gorilla/websocket v1.4.2
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.5.0
 	github.com/hashicorp/consul/api v1.9.1
-	github.com/hashicorp/go-sockaddr v1.0.2 // indirect
-	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/kr/text v0.2.0 // indirect
 	github.com/labstack/echo/v4 v4.5.0
-	github.com/leodido/go-urn v1.2.1 // indirect
 	github.com/nacos-group/nacos-sdk-go v1.0.8
 	github.com/nicksnyder/go-i18n/v2 v2.1.2
 	github.com/prometheus/client_golang v1.11.0
 	github.com/segmentio/kafka-go v0.4.17
 	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/testify v1.7.0
-	github.com/ugorji/go v1.2.6 // indirect
 	go.etcd.io/etcd/client/v3 v3.5.0
 	go.opentelemetry.io/otel v1.0.0-RC2
 	go.opentelemetry.io/otel/exporters/jaeger v1.0.0-RC2
 	go.opentelemetry.io/otel/sdk v1.0.0-RC2
 	go.opentelemetry.io/otel/trace v1.0.0-RC2
 	go.uber.org/zap v1.19.0
-	golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e // indirect
 	golang.org/x/text v0.3.6
 	google.golang.org/genproto v0.0.0-20210805201207-89edb61ffb67
 	google.golang.org/grpc v1.40.0
 	google.golang.org/protobuf v1.27.1
-	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
-	gopkg.in/ini.v1 v1.62.0 // indirect
 )
 
 replace (
-	github.com/go-kratos/kratos/middleware/logging/v2 => ../middleware/logging
-	github.com/go-kratos/kratos/middleware/metadata/v2 => ../middleware/metadata
-	github.com/go-kratos/kratos/middleware/metrics/v2 => ../middleware/metrics
-	github.com/go-kratos/kratos/middleware/recovery/v2 => ../middleware/recovery
-	github.com/go-kratos/kratos/middleware/tracing/v2 => ../middleware/tracing
-	github.com/go-kratos/kratos/middleware/validate/v2 => ../middleware/validate
-	github.com/go-kratos/kratos/registry/consul/v2 => ../registry/consul
-	github.com/go-kratos/kratos/registry/etcd/v2 => ../registry/etcd
-	github.com/go-kratos/kratos/registry/nacos/v2 => ../registry/nacos
-	github.com/go-kratos/kratos/registry/zookeeper/v2 => ../registry/zookeeper
+	github.com/go-kratos/kratos/contrib/metrics/prometheus/v2 => ../contrib/metrics/prometheus
+	github.com/go-kratos/kratos/contrib/registry/consul/v2 => ../contrib/registry/consul
+	github.com/go-kratos/kratos/contrib/registry/etcd/v2 => ../contrib/registry/etcd
+	github.com/go-kratos/kratos/contrib/registry/nacos/v2 => ../contrib/registry/nacos
+	github.com/go-kratos/kratos/contrib/registry/zookeeper/v2 => ../contrib/registry/zookeeper
 	github.com/go-kratos/kratos/v2 => ../
 )
diff --git a/examples/go.sum b/examples/go.sum
index 140ef6d9..96f29a44 100644
--- a/examples/go.sum
+++ b/examples/go.sum
@@ -39,7 +39,6 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
 github.com/DATA-DOG/go-sqlmock v1.5.0/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
-github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
@@ -51,16 +50,14 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuy
 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/aliyun/alibaba-cloud-sdk-go v1.61.18 h1:zOVTBdCKFd9JbCKz9/nt+FovbjPFmb7mUnp8nH9fQBA=
 github.com/aliyun/alibaba-cloud-sdk-go v1.61.18/go.mod h1:v8ESoHo4SyHmuB4b1tJqDHxfTGEciD+yhvOU/5s1Rfk=
-github.com/aliyun/alibaba-cloud-sdk-go v1.61.1110 h1:/KPjix8A/jm4AN5qrytNc18BPJDvxPpFphQ326wTms0=
-github.com/aliyun/alibaba-cloud-sdk-go v1.61.1110/go.mod h1:pUKYbK5JQ+1Dfxk80P0qxGqe5dkxDoabbZS7zOcouyA=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
+github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da h1:8GUt8eRujhVEGZFFEjBj46YV4rDjvGrNxb0KMWYkL2I=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
-github.com/armon/go-metrics v0.3.9 h1:O2sNqxBdvq8Eq5xmzljcYzAORli6RWCvEym4cJf9m18=
-github.com/armon/go-metrics v0.3.9/go.mod h1:4O98XIr/9W0sxpJ8UaYkvjk10Iff7SnFrb4QAOwNTFc=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
@@ -75,9 +72,8 @@ github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
+github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23 h1:D21IyuvjDCshj1/qq+pCNd3VZOAEI9jy6Bi131YlXgI=
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
-github.com/buger/jsonparser v1.1.1 h1:2PnMjfWD7wBILjqQbt530v576A/cAbQvEW9gGIpYMUs=
-github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
 github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
 github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -88,8 +84,6 @@ github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
-github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
 github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
@@ -112,7 +106,6 @@ github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfc
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -140,9 +133,8 @@ github.com/envoyproxy/protoc-gen-validate v0.6.1/go.mod h1:txg5va2Qkip90uYoSKH+n
 github.com/fastly/go-utils v0.0.0-20180712184237-d95a45783239 h1:Ghm4eQYC0nEPnSJdVkTrXpu9KtoVCSo1hg7mtI7G9KU=
 github.com/fastly/go-utils v0.0.0-20180712184237-d95a45783239/go.mod h1:Gdwt2ce0yfBxPvZrHkprdPPTTS3N5rwmLE8T22KBXlw=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
 github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
-github.com/fatih/color v1.12.0 h1:mRhaKNwANqRgUBGKmnI5ZxEk7QXmjQeCcuYFMX2bfcc=
-github.com/fatih/color v1.12.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
 github.com/felixge/httpsnoop v1.0.1 h1:lvB5Jl89CsZtGIWuTcDM1E/vkVs49/Ml7JJe07l8SPQ=
 github.com/felixge/httpsnoop v1.0.1/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/franela/goblin v0.0.0-20200105215937-c9ffbefa60db/go.mod h1:7dvUGVsVBjqR7JHJk0brhHOZYGmfBYOrK0ZhYMEtBr4=
@@ -160,9 +152,8 @@ github.com/gin-gonic/gin v1.7.2/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjX
 github.com/gin-gonic/gin v1.7.3 h1:aMBzLJ/GMEYmv1UWs2FFTcPISLrQH2mRgL9Glz8xows=
 github.com/gin-gonic/gin v1.7.3/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjXkfUtY=
 github.com/go-bindata/go-bindata v1.0.1-0.20190711162640-ee3c2418e368/go.mod h1:7xCgX1lzlrXPHkfvn3EhumqHkmSlzt8at9q7v0ax19c=
+github.com/go-errors/errors v1.0.1 h1:LUHzmkK3GUKUrL/1gfBUxAHzcev3apQlezX/+O7ma6w=
 github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
-github.com/go-errors/errors v1.4.0 h1:2OA7MFw38+e9na72T1xgkomPb6GzZzzxvJ5U630FoRM=
-github.com/go-errors/errors v1.4.0/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3BopGUQ5a5Og=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
@@ -170,16 +161,10 @@ github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.10.0/go.mod h1:xUsJbQ/Fp4kEt7AFgCuvyX4a71u8h9jB8tj/ORgOZ7o=
 github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
-github.com/go-kratos/consul v0.1.4 h1:qOOQE/FYpbWLV4cipC+jPrrc/gQY1DdfnX0IJvQleXE=
-github.com/go-kratos/consul v0.1.4/go.mod h1:egsB9apqg+4BMYVnY/VuQCeC3aAmd7mpYfIMhs4ga4U=
-github.com/go-kratos/etcd v0.1.3 h1:ARz1j4nZGgpeSw8WYau5y8LiKbsty/tMASQCaiOGZnM=
-github.com/go-kratos/etcd v0.1.3/go.mod h1:4UAwbmm/PIjUS9KwhqmfsBi9pksuvwc3ae+xaKF0Lwk=
 github.com/go-kratos/gin v0.1.0 h1:yq5GfZnSNo8cOIqxqPE0FVNQ8fm++oKQBd3/rTTp4oI=
 github.com/go-kratos/gin v0.1.0/go.mod h1:KzE88+mV1QJdmiT+sU2D560ucOXnWZx+4m0OnVcSyzQ=
 github.com/go-kratos/grpc-gateway/v2 v2.0.0-20210804092615-bdc92eb5ce83 h1:YN1KsqX3mB8hkSrOLZv3xZaZh+lZ/L7QC00RATFLJSg=
 github.com/go-kratos/grpc-gateway/v2 v2.0.0-20210804092615-bdc92eb5ce83/go.mod h1:qV5/s5A7wfY7GkNzptcUFRGAG4Y8H4mlXpSrOkDEIk0=
-github.com/go-kratos/prometheus v0.0.0-20210522055322-137e29e7cf47 h1:uJennLdg0rwhrIl0bjsObwub+I3U0vJGAhpK6CYASrM=
-github.com/go-kratos/prometheus v0.0.0-20210522055322-137e29e7cf47/go.mod h1:e3D0pnFDX5SG+ZGmGONd83WvrbmFWCdx5l4Hkl3I1eY=
 github.com/go-kratos/swagger-api v1.0.0 h1:R1JcAqLSvfDzqHoDnpK3Jt1MEJAXGNifV7AnBEhP3PE=
 github.com/go-kratos/swagger-api v1.0.0/go.mod h1:BPeS1OUN4jtMitb99ptZAagAgyQ51S2F2vd9dT/J3eM=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
@@ -194,9 +179,8 @@ github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8c
 github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
 github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no=
 github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
+github.com/go-playground/validator/v10 v10.4.1 h1:pH2c5ADXtd66mxoE0Zm9SUhxE20r7aM3F26W0hOn+GE=
 github.com/go-playground/validator/v10 v10.4.1/go.mod h1:nlOn6nFhuKACm19sB/8EGNn9GlaMV7XkbRSipzJ0Ii4=
-github.com/go-playground/validator/v10 v10.6.1 h1:W6TRDXt4WcWp4c4nf/G+6BkGdhiIo0k417gfr+V6u4I=
-github.com/go-playground/validator/v10 v10.6.1/go.mod h1:xm76BBt941f7yWdGnI2DVPFFg1UK3YY04qifoXU3lOk=
 github.com/go-redis/redis/extra/rediscmd v0.2.0 h1:A3bhCsCKsedClEH9/jYlcKqOuBoeeV+H0yDie5t+a6w=
 github.com/go-redis/redis/extra/rediscmd v0.2.0/go.mod h1:Z5bP1EHl9PvWhx/DupfCdZwB0JgOO3aVxWc/PFux+BE=
 github.com/go-redis/redis/extra/redisotel v0.3.0 h1:8rrizwFAUUeMgmelyiQi9KeFwmpQhay9E+/rE6qHsBM=
@@ -324,28 +308,22 @@ github.com/hashicorp/consul/sdk v0.8.0 h1:OJtKBtEjboEZvG6AOUdh4Z1Zbyu0WcxQ0qatRr
 github.com/hashicorp/consul/sdk v0.8.0/go.mod h1:GBvyrGALthsZObzUGsfgHZQDXjg4lOjagTIwIR1vPms=
 github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
-github.com/hashicorp/go-cleanhttp v0.5.0/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
+github.com/hashicorp/go-cleanhttp v0.5.1 h1:dH3aiDG9Jvb5r5+bYHsikaOUIpcM0xvgMXVoDkXMzJM=
 github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
-github.com/hashicorp/go-cleanhttp v0.5.2 h1:035FKYIWjmULyFRBKPs8TBQoi0x6d9G4xc9neXJWAZQ=
-github.com/hashicorp/go-cleanhttp v0.5.2/go.mod h1:kO/YDlP8L1346E6Sodw+PrpBSV4/SoxCXGY6BqNFT48=
+github.com/hashicorp/go-hclog v0.12.0 h1:d4QkX8FRTYaKaCZBoXYY8zJX2BXjWxurN/GA2tkrmZM=
 github.com/hashicorp/go-hclog v0.12.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
-github.com/hashicorp/go-hclog v0.16.2 h1:K4ev2ib4LdQETX5cSZBG0DVLk1jwGqSPXBjdah3veNs=
-github.com/hashicorp/go-hclog v0.16.2/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
+github.com/hashicorp/go-immutable-radix v1.0.0 h1:AKDB1HM5PWEA7i4nhcpwOrO2byshxBjXVn/J/3+z5/0=
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@@ -353,9 +331,8 @@ github.com/hashicorp/go-uuid v1.0.1/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/b
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@@ -377,11 +354,8 @@ github.com/influxdata/influxdb1-client v0.0.0-20191209144304-8bf82d3c094d/go.mod
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@@ -414,16 +388,14 @@ github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfn
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@@ -448,9 +420,8 @@ github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hd
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@@ -466,7 +437,6 @@ github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG
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@@ -521,9 +491,8 @@ github.com/openzipkin/zipkin-go v0.1.6/go.mod h1:QgAqvLzwWbR/WpD4A3cGpPtJrZXNIiJ
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@@ -546,7 +515,6 @@ github.com/prometheus/client_golang v0.9.3-0.20190127221311-3c4408c8b829/go.mod
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@@ -563,7 +531,6 @@ github.com/prometheus/common v0.2.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y8
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-github.com/prometheus/common v0.9.1/go.mod h1:yhUN8i9wzaXS3w1O07YhxHEBxD+W35wd8bs7vj7HSQ4=
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@@ -586,7 +553,6 @@ github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6L
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@@ -638,13 +604,10 @@ github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1
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@@ -666,13 +629,10 @@ go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738 h1:VcrIfasaLFkyjk6KNlXQSzO+B0fZcnECiDrKJsfxka0=
 go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg=
-go.etcd.io/etcd/api/v3 v3.5.0-rc.1/go.mod h1:cbVKeC6lCfl7j/8jBhAK6aIYO9XOjdptoxU/nLQcPvs=
 go.etcd.io/etcd/api/v3 v3.5.0 h1:GsV3S+OfZEOCNXdtNkBSR7kgLobAa/SO6tCxRa0GAYw=
 go.etcd.io/etcd/api/v3 v3.5.0/go.mod h1:cbVKeC6lCfl7j/8jBhAK6aIYO9XOjdptoxU/nLQcPvs=
-go.etcd.io/etcd/client/pkg/v3 v3.5.0-rc.1/go.mod h1:IJHfcCEKxYu1Os13ZdwCwIUTUVGYTSAM3YSwc9/Ac1g=
 go.etcd.io/etcd/client/pkg/v3 v3.5.0 h1:2aQv6F436YnN7I4VbI8PPYrBhu+SmrTaADcf8Mi/6PU=
 go.etcd.io/etcd/client/pkg/v3 v3.5.0/go.mod h1:IJHfcCEKxYu1Os13ZdwCwIUTUVGYTSAM3YSwc9/Ac1g=
-go.etcd.io/etcd/client/v3 v3.5.0-rc.1/go.mod h1:2N1F3ShRL8f2OhE5R4JvjHicW6XDgYMZMH9JES76bOQ=
 go.etcd.io/etcd/client/v3 v3.5.0 h1:62Eh0XOro+rDwkrypAGDfgmNh5Joq+z+W9HZdlXMzek=
 go.etcd.io/etcd/client/v3 v3.5.0/go.mod h1:AIKXXVX/DQXtfTEqBryiLTUXwON+GuvO6Z7lLS/oTh0=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
@@ -702,17 +662,15 @@ go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
+go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
-go.uber.org/atomic v1.8.0 h1:CUhrE4N1rqSE6FM9ecihEjRkLQu8cDfgDyoOs83mEY4=
-go.uber.org/atomic v1.8.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/goleak v1.1.10 h1:z+mqJhf6ss6BSfSM671tgKyZBFPTTJM+HLxnhPC3wu0=
 go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
 go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=
+go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
-go.uber.org/multierr v1.7.0 h1:zaiO/rmgFjbmCXdSYJWQcdvOCsthmdaHfr3Gm2Kx4Ec=
-go.uber.org/multierr v1.7.0/go.mod h1:7EAYxJLBy9rStEaz58O2t4Uvip6FSURkq8/ppBp95ak=
 go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee/go.mod h1:vJERXedbb3MVM5f9Ejo0C68/HhF8uaILCdgjnY+goOA=
 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 go.uber.org/zap v1.13.0/go.mod h1:zwrFLgMcdUuIBviXEYEH1YKNaOBnKXsx2IPda5bBwHM=
@@ -731,9 +689,8 @@ golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392/go.mod h1:/lpIB1dKB+9EgE3H3cr1v9wB50oz8l4C4h62xy7jSTY=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2 h1:It14KIkyBFYkHkwZ7k45minvA9aorojkyjGk9KJ5B/w=
 golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
-golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e h1:gsTQYXdTw2Gq7RBsWvlQ91b+aEQ6bXFUngBGuR8sPpI=
-golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -808,9 +765,8 @@ golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
-golang.org/x/net v0.0.0-20210610132358-84b48f89b13b h1:k+E048sYJHyVnsr1GDrRZWQ32D2C7lWs9JRc0bel53A=
-golang.org/x/net v0.0.0-20210610132358-84b48f89b13b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -887,13 +843,10 @@ golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4/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 h1:JWgyZ1qgdTaF3N3oxC+MdTV7qvEEgHo3otj+HB5CM7Q=
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210611083646-a4fc73990273/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 h1:SrN+KX8Art/Sf4HNj6Zcz06G7VEz+7w9tdXTPOZ7+l4=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -1029,7 +982,6 @@ google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6D
 google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
-google.golang.org/genproto v0.0.0-20210611144927-798beca9d670/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
 google.golang.org/genproto v0.0.0-20210617175327-b9e0b3197ced/go.mod h1:SzzZ/N+nwJDaO1kznhnlzqS8ocJICar6hYhVyhi++24=
 google.golang.org/genproto v0.0.0-20210701191553-46259e63a0a9/go.mod h1:yiaVoXHpRzHGyxV3o4DktVWY4mSUErTKaeEOq6C3t3U=
 google.golang.org/genproto v0.0.0-20210805201207-89edb61ffb67 h1:VmMSf20ssFK0+u1dscyTH9bU4/M4y+X/xNfkvD6kGtM=
@@ -1076,17 +1028,15 @@ google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQ
 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 v1.0.0-20180628173108-788fd7840127/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/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
 gopkg.in/ini.v1 v1.42.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
-gopkg.in/ini.v1 v1.62.0 h1:duBzk771uxoUuOlyRLkHsygud9+5lrlGjdFBb4mSKDU=
-gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 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=
diff --git a/examples/helloworld/client/main.go b/examples/helloworld/client/main.go
index 83fdb152..1be1c779 100644
--- a/examples/helloworld/client/main.go
+++ b/examples/helloworld/client/main.go
@@ -6,7 +6,7 @@ import (
 
 	pb "github.com/go-kratos/kratos/examples/helloworld/helloworld"
 	"github.com/go-kratos/kratos/v2/errors"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	transgrpc "github.com/go-kratos/kratos/v2/transport/grpc"
 	transhttp "github.com/go-kratos/kratos/v2/transport/http"
 )
diff --git a/examples/helloworld/server/main.go b/examples/helloworld/server/main.go
index aae7419e..f60cdfcb 100644
--- a/examples/helloworld/server/main.go
+++ b/examples/helloworld/server/main.go
@@ -8,7 +8,7 @@ import (
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/errors"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 )
diff --git a/examples/http/gin/main.go b/examples/http/gin/main.go
index 00f897ea..82e9fec3 100644
--- a/examples/http/gin/main.go
+++ b/examples/http/gin/main.go
@@ -10,7 +10,7 @@ import (
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/errors"
 	"github.com/go-kratos/kratos/v2/middleware"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	"github.com/go-kratos/kratos/v2/transport"
 	"github.com/go-kratos/kratos/v2/transport/http"
 )
diff --git a/examples/i18n/internal/server/grpc.go b/examples/i18n/internal/server/grpc.go
index c2f99ec3..a8da23ae 100644
--- a/examples/i18n/internal/server/grpc.go
+++ b/examples/i18n/internal/server/grpc.go
@@ -5,11 +5,11 @@ import (
 	"github.com/go-kratos/kratos/examples/i18n/internal/conf"
 	"github.com/go-kratos/kratos/examples/i18n/internal/service"
 	"github.com/go-kratos/kratos/v2/log"
-	"github.com/go-kratos/kratos/middleware/logging/v2"
-	"github.com/go-kratos/kratos/middleware/metrics/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
-	"github.com/go-kratos/kratos/middleware/tracing/v2"
-	"github.com/go-kratos/kratos/middleware/validate/v2"
+	"github.com/go-kratos/kratos/v2/middleware/logging"
+	"github.com/go-kratos/kratos/v2/middleware/metrics"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
+	"github.com/go-kratos/kratos/v2/middleware/tracing"
+	"github.com/go-kratos/kratos/v2/middleware/validate"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 )
 
diff --git a/examples/i18n/internal/server/http.go b/examples/i18n/internal/server/http.go
index 36fb5d3f..28aaa568 100644
--- a/examples/i18n/internal/server/http.go
+++ b/examples/i18n/internal/server/http.go
@@ -1,16 +1,16 @@
 package server
 
 import (
-	"github.com/go-kratos/kratos/examples/i18n/api/helloworld/v1"
+	v1 "github.com/go-kratos/kratos/examples/i18n/api/helloworld/v1"
 	"github.com/go-kratos/kratos/examples/i18n/internal/conf"
 	"github.com/go-kratos/kratos/examples/i18n/internal/pkg/middleware/localize"
 	"github.com/go-kratos/kratos/examples/i18n/internal/service"
 	"github.com/go-kratos/kratos/v2/log"
-	"github.com/go-kratos/kratos/middleware/logging/v2"
-	"github.com/go-kratos/kratos/middleware/metrics/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
-	"github.com/go-kratos/kratos/middleware/tracing/v2"
-	"github.com/go-kratos/kratos/middleware/validate/v2"
+	"github.com/go-kratos/kratos/v2/middleware/logging"
+	"github.com/go-kratos/kratos/v2/middleware/metrics"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
+	"github.com/go-kratos/kratos/v2/middleware/tracing"
+	"github.com/go-kratos/kratos/v2/middleware/validate"
 	"github.com/go-kratos/kratos/v2/transport/http"
 )
 
diff --git a/examples/metadata/client/main.go b/examples/metadata/client/main.go
index aed7fcb9..643a2a48 100644
--- a/examples/metadata/client/main.go
+++ b/examples/metadata/client/main.go
@@ -6,7 +6,7 @@ import (
 
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
 	"github.com/go-kratos/kratos/v2/metadata"
-	mmd "github.com/go-kratos/kratos/middleware/metadata/v2"
+	mmd "github.com/go-kratos/kratos/v2/middleware/metadata"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 )
diff --git a/examples/metadata/server/main.go b/examples/metadata/server/main.go
index 1dd5048f..e8ef1daa 100644
--- a/examples/metadata/server/main.go
+++ b/examples/metadata/server/main.go
@@ -8,7 +8,7 @@ import (
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/metadata"
-	mmd "github.com/go-kratos/kratos/middleware/metadata/v2"
+	mmd "github.com/go-kratos/kratos/v2/middleware/metadata"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 )
diff --git a/examples/metrics/main.go b/examples/metrics/main.go
index f7a6269e..84019477 100644
--- a/examples/metrics/main.go
+++ b/examples/metrics/main.go
@@ -5,8 +5,8 @@ import (
 	"fmt"
 	"log"
 
-	"github.com/go-kratos/kratos/middleware/metrics/v2"
-	prom "github.com/go-kratos/prometheus/metrics"
+	prom "github.com/go-kratos/kratos/contrib/metrics/prometheus/v2"
+	"github.com/go-kratos/kratos/v2/middleware/metrics"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
diff --git a/examples/registry/consul/client/main.go b/examples/registry/consul/client/main.go
index e03f6ee4..10ceaee0 100644
--- a/examples/registry/consul/client/main.go
+++ b/examples/registry/consul/client/main.go
@@ -5,9 +5,9 @@ import (
 	"log"
 	"time"
 
+	"github.com/go-kratos/kratos/contrib/registry/consul/v2"
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
-	"github.com/go-kratos/kratos/registry/consul/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 	"github.com/hashicorp/consul/api"
@@ -26,7 +26,7 @@ func main() {
 }
 
 func callGRPC(cli *api.Client) {
-	r := registry.New(cli)
+	r := consul.New(cli)
 	conn, err := grpc.DialInsecure(
 		context.Background(),
 		grpc.WithEndpoint("discovery:///helloworld"),
@@ -45,7 +45,7 @@ func callGRPC(cli *api.Client) {
 }
 
 func callHTTP(cli *api.Client) {
-	r := registry.New(cli)
+	r := consul.New(cli)
 	conn, err := http.NewClient(
 		context.Background(),
 		http.WithMiddleware(
diff --git a/examples/registry/consul/server/main.go b/examples/registry/consul/server/main.go
index 675dfb21..6da9587f 100644
--- a/examples/registry/consul/server/main.go
+++ b/examples/registry/consul/server/main.go
@@ -5,10 +5,10 @@ import (
 	"fmt"
 	"log"
 
+	"github.com/go-kratos/kratos/contrib/registry/consul/v2"
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
-	"github.com/go-kratos/kratos/registry/consul/v2"
 	"github.com/go-kratos/kratos/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 	"github.com/hashicorp/consul/api"
@@ -47,7 +47,7 @@ func main() {
 	helloworld.RegisterGreeterServer(grpcSrv, s)
 	helloworld.RegisterGreeterHTTPServer(httpSrv, s)
 
-	r := registry.New(consulClient)
+	r := consul.New(consulClient)
 	app := kratos.New(
 		kratos.Name("helloworld"),
 		kratos.Server(
diff --git a/examples/registry/etcd/client/main.go b/examples/registry/etcd/client/main.go
index cc5da257..c63feacd 100644
--- a/examples/registry/etcd/client/main.go
+++ b/examples/registry/etcd/client/main.go
@@ -5,8 +5,8 @@ import (
 	"log"
 	"time"
 
+	"github.com/go-kratos/kratos/contrib/registry/etcd/v2"
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
-	"github.com/go-kratos/kratos/registry/etcd/v2"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 	clientv3 "go.etcd.io/etcd/client/v3"
@@ -20,9 +20,9 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-	r := registry.New(cli)
+	r := etcd.New(cli)
 
-	connGrpc, err := grpc.DialInsecure(
+	connGRPC, err := grpc.DialInsecure(
 		context.Background(),
 		grpc.WithEndpoint("discovery:///helloworld"),
 		grpc.WithDiscovery(r),
@@ -30,9 +30,9 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	defer connGrpc.Close()
+	defer connGRPC.Close()
 
-	connHttp, err := http.NewClient(
+	connHTTP, err := http.NewClient(
 		context.Background(),
 		http.WithEndpoint("discovery:///helloworld"),
 		http.WithDiscovery(r),
@@ -41,16 +41,16 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	defer connHttp.Close()
+	defer connHTTP.Close()
 
 	for {
-		callHTTP(r, connHttp)
-		callGRPC(r, connGrpc)
+		callHTTP(r, connHTTP)
+		callGRPC(r, connGRPC)
 		time.Sleep(time.Second)
 	}
 }
 
-func callGRPC(r *registry.Registry, conn *srcgrpc.ClientConn) {
+func callGRPC(r *etcd.Registry, conn *srcgrpc.ClientConn) {
 	client := helloworld.NewGreeterClient(conn)
 	reply, err := client.SayHello(context.Background(), &helloworld.HelloRequest{Name: "kratos"})
 	if err != nil {
@@ -59,7 +59,7 @@ func callGRPC(r *registry.Registry, conn *srcgrpc.ClientConn) {
 	log.Printf("[grpc] SayHello %+v\n", reply)
 }
 
-func callHTTP(r *registry.Registry,conn *http.Client) {
+func callHTTP(r *etcd.Registry, conn *http.Client) {
 	client := helloworld.NewGreeterHTTPClient(conn)
 	reply, err := client.SayHello(context.Background(), &helloworld.HelloRequest{Name: "kratos"})
 	if err != nil {
diff --git a/examples/registry/etcd/server/main.go b/examples/registry/etcd/server/main.go
index 37aff62c..9589d434 100644
--- a/examples/registry/etcd/server/main.go
+++ b/examples/registry/etcd/server/main.go
@@ -5,13 +5,13 @@ import (
 	"fmt"
 	"log"
 
+	"github.com/go-kratos/kratos/contrib/registry/etcd/v2"
 	pb "github.com/go-kratos/kratos/examples/helloworld/helloworld"
-	"github.com/go-kratos/kratos/registry/etcd/v2"
 	"github.com/go-kratos/kratos/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
-	etcd "go.etcd.io/etcd/client/v3"
+	etcdclient "go.etcd.io/etcd/client/v3"
 )
 
 // server is used to implement helloworld.GreeterServer.
@@ -25,7 +25,7 @@ func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloRe
 }
 
 func main() {
-	client, err := etcd.New(etcd.Config{
+	client, err := etcdclient.New(etcdclient.Config{
 		Endpoints: []string{"127.0.0.1:2379"},
 	})
 	if err != nil {
@@ -49,7 +49,7 @@ func main() {
 	pb.RegisterGreeterServer(grpcSrv, s)
 	pb.RegisterGreeterHTTPServer(httpSrv, s)
 
-	r := registry.New(client)
+	r := etcd.New(client)
 	app := kratos.New(
 		kratos.Name("helloworld"),
 		kratos.Server(
diff --git a/examples/registry/nacos/client/main.go b/examples/registry/nacos/client/main.go
index 91fab6f2..615ac53c 100644
--- a/examples/registry/nacos/client/main.go
+++ b/examples/registry/nacos/client/main.go
@@ -4,8 +4,8 @@ import (
 	"context"
 	"log"
 
+	"github.com/go-kratos/kratos/contrib/registry/nacos/v2"
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
-	"github.com/go-kratos/kratos/registry/nacos/v2"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/nacos-group/nacos-sdk-go/clients"
 	"github.com/nacos-group/nacos-sdk-go/common/constant"
@@ -41,7 +41,7 @@ func main() {
 	conn, err := grpc.DialInsecure(
 		context.Background(),
 		grpc.WithEndpoint("discovery:///helloworld"),
-		grpc.WithDiscovery(registry.New(cli)),
+		grpc.WithDiscovery(nacos.New(cli)),
 	)
 	if err != nil {
 		log.Fatal(err)
diff --git a/examples/registry/nacos/server/main.go b/examples/registry/nacos/server/main.go
index 97c7b446..f7e73924 100644
--- a/examples/registry/nacos/server/main.go
+++ b/examples/registry/nacos/server/main.go
@@ -5,10 +5,10 @@ import (
 	"fmt"
 	"log"
 
+	"github.com/go-kratos/kratos/contrib/registry/nacos/v2"
 	pb "github.com/go-kratos/kratos/examples/helloworld/helloworld"
-	"github.com/go-kratos/kratos/registry/nacos/v2"
 	"github.com/go-kratos/kratos/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 	"github.com/nacos-group/nacos-sdk-go/clients"
@@ -69,7 +69,7 @@ func main() {
 	pb.RegisterGreeterServer(grpcSrv, s)
 	pb.RegisterGreeterHTTPServer(httpSrv, s)
 
-	r := registry.New(client)
+	r := nacos.New(client)
 	app := kratos.New(
 		kratos.Name("helloworld"),
 		kratos.Server(
diff --git a/examples/registry/zookeeper/client/main.go b/examples/registry/zookeeper/client/main.go
index 7e6b4dc3..9e8ce7cd 100644
--- a/examples/registry/zookeeper/client/main.go
+++ b/examples/registry/zookeeper/client/main.go
@@ -5,14 +5,14 @@ import (
 	"log"
 	"time"
 
+	"github.com/go-kratos/kratos/contrib/registry/zookeeper/v2"
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
-	"github.com/go-kratos/kratos/registry/zookeeper/v2"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 )
 
 func main() {
-	r, err := registry.New([]string{"127.0.0.1:2181"})
+	r, err := zookeeper.New([]string{"127.0.0.1:2181"})
 	if err != nil {
 		panic(err)
 	}
@@ -23,7 +23,7 @@ func main() {
 	}
 }
 
-func callGRPC(r *registry.Registry) {
+func callGRPC(r *zookeeper.Registry) {
 	conn, err := grpc.DialInsecure(
 		context.Background(),
 		grpc.WithEndpoint("discovery:///helloworld"),
@@ -41,7 +41,7 @@ func callGRPC(r *registry.Registry) {
 	log.Printf("[grpc] SayHello %+v\n", reply)
 }
 
-func callHTTP(r *registry.Registry) {
+func callHTTP(r *zookeeper.Registry) {
 	conn, err := http.NewClient(
 		context.Background(),
 		http.WithEndpoint("discovery:///helloworld"),
diff --git a/examples/registry/zookeeper/server/main.go b/examples/registry/zookeeper/server/main.go
index 86060a68..ef9947d5 100644
--- a/examples/registry/zookeeper/server/main.go
+++ b/examples/registry/zookeeper/server/main.go
@@ -5,10 +5,10 @@ import (
 	"fmt"
 	"log"
 
+	"github.com/go-kratos/kratos/contrib/registry/zookeeper/v2"
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
-	"github.com/go-kratos/kratos/registry/zookeeper/v2"
 	"github.com/go-kratos/kratos/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 )
@@ -24,7 +24,7 @@ func (s *server) SayHello(ctx context.Context, in *helloworld.HelloRequest) (*he
 }
 
 func main() {
-	r, err := registry.New([]string{"127.0.0.1:2181"})
+	r, err := zookeeper.New([]string{"127.0.0.1:2181"})
 	if err != nil {
 		log.Fatal(err)
 	}
diff --git a/examples/stream/client/main.go b/examples/stream/client/main.go
index e2a56a35..5086ae7e 100644
--- a/examples/stream/client/main.go
+++ b/examples/stream/client/main.go
@@ -10,7 +10,7 @@ import (
 	"time"
 
 	"github.com/go-kratos/kratos/examples/stream/hello"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	transgrpc "github.com/go-kratos/kratos/v2/transport/grpc"
 )
 
diff --git a/examples/stream/server/main.go b/examples/stream/server/main.go
index b0102128..b2561217 100644
--- a/examples/stream/server/main.go
+++ b/examples/stream/server/main.go
@@ -6,7 +6,7 @@ import (
 	"github.com/go-kratos/kratos/examples/stream/hello"
 	"github.com/go-kratos/kratos/examples/stream/service"
 	"github.com/go-kratos/kratos/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 )
 
diff --git a/examples/traces/app/message/main.go b/examples/traces/app/message/main.go
index 1993ccb9..7f59c69b 100644
--- a/examples/traces/app/message/main.go
+++ b/examples/traces/app/message/main.go
@@ -8,9 +8,9 @@ import (
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/log"
 	"github.com/go-kratos/kratos/v2/middleware"
-	"github.com/go-kratos/kratos/middleware/logging/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
-	"github.com/go-kratos/kratos/middleware/tracing/v2"
+	"github.com/go-kratos/kratos/v2/middleware/logging"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
+	"github.com/go-kratos/kratos/v2/middleware/tracing"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
@@ -85,7 +85,6 @@ func main() {
 		grpc.Middleware(
 			middleware.Chain(
 				recovery.Recovery(),
-				// Configuring tracing Middleware
 				tracing.Server(),
 				logging.Server(logger),
 			),
diff --git a/examples/traces/app/user/main.go b/examples/traces/app/user/main.go
index 9f64a29b..ad672a1e 100644
--- a/examples/traces/app/user/main.go
+++ b/examples/traces/app/user/main.go
@@ -7,11 +7,11 @@ import (
 
 	messagev1 "github.com/go-kratos/kratos/examples/traces/api/message"
 	v1 "github.com/go-kratos/kratos/examples/traces/api/user"
-	"github.com/go-kratos/kratos/middleware/logging/v2"
-	"github.com/go-kratos/kratos/middleware/recovery/v2"
-	"github.com/go-kratos/kratos/middleware/tracing/v2"
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/log"
+	"github.com/go-kratos/kratos/v2/middleware/logging"
+	"github.com/go-kratos/kratos/v2/middleware/recovery"
+	"github.com/go-kratos/kratos/v2/middleware/tracing"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 
@@ -107,7 +107,6 @@ func main() {
 		http.Address(":8000"),
 		http.Middleware(
 			recovery.Recovery(),
-			// Configuring tracing middleware
 			tracing.Server(),
 			logging.Server(logger),
 		),
diff --git a/examples/validate/main.go b/examples/validate/main.go
index afbb308b..bd42edfb 100644
--- a/examples/validate/main.go
+++ b/examples/validate/main.go
@@ -6,7 +6,7 @@ import (
 
 	"github.com/go-kratos/kratos/examples/validate/api"
 	"github.com/go-kratos/kratos/v2"
-	"github.com/go-kratos/kratos/middleware/validate/v2"
+	"github.com/go-kratos/kratos/v2/middleware/validate"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
 	"github.com/go-kratos/kratos/v2/transport/http"
 )
diff --git a/go.mod b/go.mod
index b9dc745b..2169804e 100644
--- a/go.mod
+++ b/go.mod
@@ -9,6 +9,9 @@ require (
 	github.com/gorilla/mux v1.8.0
 	github.com/imdario/mergo v0.3.12
 	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/otel v1.0.0-RC2
+	go.opentelemetry.io/otel/sdk v1.0.0-RC2
+	go.opentelemetry.io/otel/trace v1.0.0-RC2
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 	google.golang.org/genproto v0.0.0-20210805201207-89edb61ffb67
 	google.golang.org/grpc v1.39.1
diff --git a/go.sum b/go.sum
index 07adf0ac..a96db6f9 100644
--- a/go.sum
+++ b/go.sum
@@ -43,8 +43,9 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -62,6 +63,12 @@ github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+go.opentelemetry.io/otel v1.0.0-RC2 h1:SHhxSjB+omnGZPgGlKe+QMp3MyazcOHdQ8qwo89oKbg=
+go.opentelemetry.io/otel v1.0.0-RC2/go.mod h1:w1thVQ7qbAy8MHb0IFj8a5Q2QU0l2ksf8u/CN8m3NOM=
+go.opentelemetry.io/otel/sdk v1.0.0-RC2 h1:ROuteeSCBaZNjiT9JcFzZepmInDvLktR28Y6qKo8bCs=
+go.opentelemetry.io/otel/sdk v1.0.0-RC2/go.mod h1:fgwHyiDn4e5k40TD9VX243rOxXR+jzsWBZYA2P5jpEw=
+go.opentelemetry.io/otel/trace v1.0.0-RC2 h1:dunAP0qDULMIT82atj34m5RgvsIK6LcsXf1c/MsYg1w=
+go.opentelemetry.io/otel/trace v1.0.0-RC2/go.mod h1:JPQ+z6nNw9mqEGT8o3eoPTdnNI+Aj5JcxEsVGREIAy4=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
@@ -98,6 +105,7 @@ golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/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 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
diff --git a/metrics/prometheus/LICENSE b/metrics/prometheus/LICENSE
deleted file mode 100644
index fa53a35f..00000000
--- a/metrics/prometheus/LICENSE
+++ /dev/null
@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2021 Kratos
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/metrics/prometheus/go.mod b/metrics/prometheus/go.mod
deleted file mode 100644
index e7d0be78..00000000
--- a/metrics/prometheus/go.mod
+++ /dev/null
@@ -1,10 +0,0 @@
-module github.com/go-kratos/kratos/metrics/prometheus/v2
-
-go 1.15
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.5
-	github.com/prometheus/client_golang v1.9.0
-)
-
-replace github.com/go-kratos/kratos/v2 v2.0.5 => ../../../kratos
diff --git a/middleware/logging/go.mod b/middleware/logging/go.mod
deleted file mode 100644
index a881725d..00000000
--- a/middleware/logging/go.mod
+++ /dev/null
@@ -1,7 +0,0 @@
-module github.com/go-kratos/kratos/middleware/logging/v2
-
-go 1.15
-
-require github.com/go-kratos/kratos/v2 v2.0.5
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/middleware/logging/go.sum b/middleware/logging/go.sum
deleted file mode 100644
index 3f1a4310..00000000
--- a/middleware/logging/go.sum
+++ /dev/null
@@ -1,155 +0,0 @@
-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=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
-github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
-github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
-github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
-github.com/go-playground/assert/v2 v2.0.1 h1:MsBgLAaY856+nPRTKrp3/OZK38U/wa0CcBYNjji3q3A=
-github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
-github.com/go-playground/form/v4 v4.2.0 h1:N1wh+Goz61e6w66vo8vJkQt+uwZSoLz50kZPJWR8eic=
-github.com/go-playground/form/v4 v4.2.0/go.mod h1:q1a2BY+AQUUzhl6xA/6hBetay6dEIhMHjgvJiGo6K7U=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
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-github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
-github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
-github.com/imdario/mergo v0.3.12/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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-go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
-golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
-golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
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-golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
-golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
-golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
-golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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diff --git a/middleware/logging/logging.go b/middleware/logging/logging.go
index 668254ab..d050da9a 100644
--- a/middleware/logging/logging.go
+++ b/middleware/logging/logging.go
@@ -97,4 +97,4 @@ func extractError(err error) (log.Level, string) {
 		return log.LevelError, fmt.Sprintf("%+v", err)
 	}
 	return log.LevelInfo, ""
-}
\ No newline at end of file
+}
diff --git a/middleware/metadata/go.mod b/middleware/metadata/go.mod
deleted file mode 100644
index c3848c4c..00000000
--- a/middleware/metadata/go.mod
+++ /dev/null
@@ -1,7 +0,0 @@
-module github.com/go-kratos/kratos/middleware/metadata/v2
-
-go 1.15
-
-require github.com/go-kratos/kratos/v2 v2.0.5
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/middleware/metadata/go.sum b/middleware/metadata/go.sum
deleted file mode 100644
index 7e4a1159..00000000
--- a/middleware/metadata/go.sum
+++ /dev/null
@@ -1,150 +0,0 @@
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diff --git a/middleware/metrics/go.mod b/middleware/metrics/go.mod
deleted file mode 100644
index 20706528..00000000
--- a/middleware/metrics/go.mod
+++ /dev/null
@@ -1,10 +0,0 @@
-module github.com/go-kratos/kratos/middleware/metrics/v2
-
-go 1.15
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.5
-	github.com/stretchr/testify v1.7.0
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/middleware/metrics/go.sum b/middleware/metrics/go.sum
deleted file mode 100644
index 3f1a4310..00000000
--- a/middleware/metrics/go.sum
+++ /dev/null
@@ -1,155 +0,0 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
-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=
diff --git a/middleware/metrics/metrics.go b/middleware/metrics/metrics.go
index 64ecaed0..1ca95cca 100644
--- a/middleware/metrics/metrics.go
+++ b/middleware/metrics/metrics.go
@@ -37,9 +37,9 @@ type options struct {
 
 // Server is middleware server-side metrics.
 func Server(opts ...Option) middleware.Middleware {
-	options := options{}
+	op := options{}
 	for _, o := range opts {
-		o(&options)
+		o(&op)
 	}
 	return func(handler middleware.Handler) middleware.Handler {
 		return func(ctx context.Context, req interface{}) (interface{}, error) {
@@ -59,11 +59,11 @@ func Server(opts ...Option) middleware.Middleware {
 				code = int(se.Code)
 				reason = se.Reason
 			}
-			if options.requests != nil {
-				options.requests.With(kind, operation, strconv.Itoa(code), reason).Inc()
+			if op.requests != nil {
+				op.requests.With(kind, operation, strconv.Itoa(code), reason).Inc()
 			}
-			if options.seconds != nil {
-				options.seconds.With(kind, operation).Observe(time.Since(startTime).Seconds())
+			if op.seconds != nil {
+				op.seconds.With(kind, operation).Observe(time.Since(startTime).Seconds())
 			}
 			return reply, err
 		}
@@ -72,9 +72,9 @@ func Server(opts ...Option) middleware.Middleware {
 
 // Client is middleware client-side metrics.
 func Client(opts ...Option) middleware.Middleware {
-	options := options{}
+	op := options{}
 	for _, o := range opts {
-		o(&options)
+		o(&op)
 	}
 	return func(handler middleware.Handler) middleware.Handler {
 		return func(ctx context.Context, req interface{}) (interface{}, error) {
@@ -94,11 +94,11 @@ func Client(opts ...Option) middleware.Middleware {
 				code = int(se.Code)
 				reason = se.Reason
 			}
-			if options.requests != nil {
-				options.requests.With(kind, operation, strconv.Itoa(code), reason).Inc()
+			if op.requests != nil {
+				op.requests.With(kind, operation, strconv.Itoa(code), reason).Inc()
 			}
-			if options.seconds != nil {
-				options.seconds.With(kind, operation).Observe(time.Since(startTime).Seconds())
+			if op.seconds != nil {
+				op.seconds.With(kind, operation).Observe(time.Since(startTime).Seconds())
 			}
 			return reply, err
 		}
diff --git a/middleware/recovery/go.mod b/middleware/recovery/go.mod
deleted file mode 100644
index 4ff8fe66..00000000
--- a/middleware/recovery/go.mod
+++ /dev/null
@@ -1,7 +0,0 @@
-module github.com/go-kratos/kratos/middleware/recovery/v2
-
-go 1.15
-
-require github.com/go-kratos/kratos/v2 v2.0.5
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/middleware/recovery/go.sum b/middleware/recovery/go.sum
deleted file mode 100644
index 7646e429..00000000
--- a/middleware/recovery/go.sum
+++ /dev/null
@@ -1,153 +0,0 @@
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-golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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-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=
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-golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
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-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
-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=
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-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-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 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
-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=
diff --git a/middleware/recovery/recovery.go b/middleware/recovery/recovery.go
index 83083c05..8cb26e24 100644
--- a/middleware/recovery/recovery.go
+++ b/middleware/recovery/recovery.go
@@ -37,16 +37,16 @@ func WithLogger(logger log.Logger) Option {
 
 // Recovery is a server middleware that recovers from any panics.
 func Recovery(opts ...Option) middleware.Middleware {
-	options := options{
+	op := options{
 		logger: log.DefaultLogger,
 		handler: func(ctx context.Context, req, err interface{}) error {
 			return errors.InternalServer("RECOVERY", fmt.Sprintf("panic triggered: %v", err))
 		},
 	}
 	for _, o := range opts {
-		o(&options)
+		o(&op)
 	}
-	logger := log.NewHelper(options.logger)
+	logger := log.NewHelper(op.logger)
 	return func(handler middleware.Handler) middleware.Handler {
 		return func(ctx context.Context, req interface{}) (reply interface{}, err error) {
 			defer func() {
@@ -56,7 +56,7 @@ func Recovery(opts ...Option) middleware.Middleware {
 					buf = buf[:n]
 					logger.Errorf("%v: %+v\n%s\n", rerr, req, buf)
 
-					err = options.handler(ctx, req, rerr)
+					err = op.handler(ctx, req, rerr)
 				}
 			}()
 			return handler(ctx, req)
diff --git a/middleware/tracing/go.mod b/middleware/tracing/go.mod
deleted file mode 100644
index 6a80ffe6..00000000
--- a/middleware/tracing/go.mod
+++ /dev/null
@@ -1,15 +0,0 @@
-module github.com/go-kratos/kratos/middleware/tracing/v2
-
-go 1.15
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.5
-	github.com/stretchr/testify v1.7.0
-	go.opentelemetry.io/otel v1.0.0-RC2
-	go.opentelemetry.io/otel/sdk v1.0.0-RC2
-	go.opentelemetry.io/otel/trace v1.0.0-RC2
-	google.golang.org/grpc v1.39.1
-	google.golang.org/protobuf v1.27.1
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/middleware/tracing/go.sum b/middleware/tracing/go.sum
deleted file mode 100644
index 7d54b41f..00000000
--- a/middleware/tracing/go.sum
+++ /dev/null
@@ -1,166 +0,0 @@
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-github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
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-github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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-github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
-go.opentelemetry.io/otel v1.0.0-RC2 h1:SHhxSjB+omnGZPgGlKe+QMp3MyazcOHdQ8qwo89oKbg=
-go.opentelemetry.io/otel v1.0.0-RC2/go.mod h1:w1thVQ7qbAy8MHb0IFj8a5Q2QU0l2ksf8u/CN8m3NOM=
-go.opentelemetry.io/otel/sdk v1.0.0-RC2 h1:ROuteeSCBaZNjiT9JcFzZepmInDvLktR28Y6qKo8bCs=
-go.opentelemetry.io/otel/sdk v1.0.0-RC2/go.mod h1:fgwHyiDn4e5k40TD9VX243rOxXR+jzsWBZYA2P5jpEw=
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-go.opentelemetry.io/otel/trace v1.0.0-RC2/go.mod h1:JPQ+z6nNw9mqEGT8o3eoPTdnNI+Aj5JcxEsVGREIAy4=
-go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
-golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
-golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
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-golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
-golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
-golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
-golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
-golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
-golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/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 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
-golang.org/x/sys v0.0.0-20210510120138-977fb7262007/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 v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
-golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
-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 v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-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=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
-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 v0.0.0-20210805201207-89edb61ffb67 h1:VmMSf20ssFK0+u1dscyTH9bU4/M4y+X/xNfkvD6kGtM=
-google.golang.org/genproto v0.0.0-20210805201207-89edb61ffb67/go.mod h1:ob2IJxKrgPT52GcgX759i1sleT07tiKowYBGbczaW48=
-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 v1.39.0/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
-google.golang.org/grpc v1.39.1 h1:f37vZbBVTiJ6jKG5mWz8ySOBxNqy6ViPgyhSdVnxF3E=
-google.golang.org/grpc v1.39.1/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
-google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
-google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-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/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-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 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
-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=
diff --git a/middleware/tracing/tracer.go b/middleware/tracing/tracer.go
index 8bad3987..bb606ff1 100644
--- a/middleware/tracing/tracer.go
+++ b/middleware/tracing/tracer.go
@@ -22,21 +22,21 @@ type Tracer struct {
 
 // NewTracer create tracer instance
 func NewTracer(kind trace.SpanKind, opts ...Option) *Tracer {
-	options := options{
+	op := options{
 		propagator: propagation.NewCompositeTextMapPropagator(Metadata{}, propagation.Baggage{}, propagation.TraceContext{}),
 	}
 	for _, o := range opts {
-		o(&options)
+		o(&op)
 	}
-	if options.tracerProvider != nil {
-		otel.SetTracerProvider(options.tracerProvider)
+	if op.tracerProvider != nil {
+		otel.SetTracerProvider(op.tracerProvider)
 	}
 
 	switch kind {
 	case trace.SpanKindClient:
-		return &Tracer{tracer: otel.Tracer("kartos"), kind: kind, opt: &options}
+		return &Tracer{tracer: otel.Tracer("kartos"), kind: kind, opt: &op}
 	case trace.SpanKindServer:
-		return &Tracer{tracer: otel.Tracer("kartos"), kind: kind, opt: &options}
+		return &Tracer{tracer: otel.Tracer("kartos"), kind: kind, opt: &op}
 	default:
 		panic(fmt.Sprintf("unsupported span kind: %v", kind))
 	}
diff --git a/middleware/tracing/tracing.go b/middleware/tracing/tracing.go
index b900d271..c04b13d0 100644
--- a/middleware/tracing/tracing.go
+++ b/middleware/tracing/tracing.go
@@ -2,6 +2,7 @@ package tracing
 
 import (
 	"context"
+
 	"github.com/go-kratos/kratos/v2/log"
 
 	"github.com/go-kratos/kratos/v2/middleware"
@@ -83,4 +84,4 @@ func SpanID() log.Valuer {
 		}
 		return ""
 	}
-}
\ No newline at end of file
+}
diff --git a/middleware/validate/go.mod b/middleware/validate/go.mod
deleted file mode 100644
index 757b4309..00000000
--- a/middleware/validate/go.mod
+++ /dev/null
@@ -1,7 +0,0 @@
-module github.com/go-kratos/kratos/middleware/validate/v2
-
-go 1.15
-
-require github.com/go-kratos/kratos/v2 v2.0.5
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/middleware/validate/go.sum b/middleware/validate/go.sum
deleted file mode 100644
index 7646e429..00000000
--- a/middleware/validate/go.sum
+++ /dev/null
@@ -1,153 +0,0 @@
-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=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.39.0/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
-google.golang.org/grpc v1.39.1 h1:f37vZbBVTiJ6jKG5mWz8ySOBxNqy6ViPgyhSdVnxF3E=
-google.golang.org/grpc v1.39.1/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
-google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
-google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-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/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-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 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
-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=
diff --git a/registry/README.md b/registry/README.md
index 483472d0..f5fcb08c 100644
--- a/registry/README.md
+++ b/registry/README.md
@@ -2,25 +2,25 @@
 
 ## Consul
 ```shell
-go get -u github.com/go-kratos/kratos/registry/consul/v2
+go get -u github.com/go-kratos/kratos/contrib/registry/consul/v2
 ```
 
 ## Etcd
 ```shell
-go get -u github.com/go-kratos/kratos/registry/etcd/v2
+go get -u github.com/go-kratos/kratos/contrib/registry/etcd/v2
 ```
 
 ## zookeeper
 ```shell
-go get -u github.com/go-kratos/kratos/registry/zookeeper/v2
+go get -u github.com/go-kratos/kratos/contrib/registry/zookeeper/v2
 ```
 
 ## Nacos
 ```shell
-go get -u github.com/go-kratos/kratos/registry/nacos/v2
+go get -u github.com/go-kratos/kratos/contrib/registry/nacos/v2
 ```
 
 ## kubernetes
 ```shell
-go get -u github.com/go-kratos/kratos/registry/kubernetes/v2
+go get -u github.com/go-kratos/kratos/contrib/registry/kubernetes/v2
 ```
\ No newline at end of file
diff --git a/registry/consul/go.mod b/registry/consul/go.mod
deleted file mode 100644
index 113ea60e..00000000
--- a/registry/consul/go.mod
+++ /dev/null
@@ -1,12 +0,0 @@
-module github.com/go-kratos/kratos/registry/consul/v2
-
-go 1.16
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.5
-	github.com/hashicorp/consul/api v1.9.1
-	github.com/stretchr/testify v1.7.0
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
-
diff --git a/registry/etcd/go.mod b/registry/etcd/go.mod
deleted file mode 100644
index 15c27cf1..00000000
--- a/registry/etcd/go.mod
+++ /dev/null
@@ -1,11 +0,0 @@
-module github.com/go-kratos/kratos/registry/etcd/v2
-
-go 1.16
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.5
-	go.etcd.io/etcd/client/v3 v3.5.0
-	google.golang.org/grpc v1.40.0
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/registry/kubernetes/go.mod b/registry/kubernetes/go.mod
deleted file mode 100644
index 69bf9e84..00000000
--- a/registry/kubernetes/go.mod
+++ /dev/null
@@ -1,13 +0,0 @@
-module github.com/go-kratos/kratos/registry/kubernetes/v2
-
-go 1.17
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.5
-	github.com/json-iterator/go v1.1.11
-	k8s.io/api v0.22.1
-	k8s.io/apimachinery v0.22.1
-	k8s.io/client-go v0.22.1
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
\ No newline at end of file
diff --git a/registry/nacos/go.mod b/registry/nacos/go.mod
deleted file mode 100644
index e1146d92..00000000
--- a/registry/nacos/go.mod
+++ /dev/null
@@ -1,10 +0,0 @@
-module github.com/go-kratos/kratos/registry/nacos/v2
-
-go 1.16
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.5
-	github.com/nacos-group/nacos-sdk-go v1.0.8
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos
diff --git a/registry/zookeeper/go.mod b/registry/zookeeper/go.mod
deleted file mode 100644
index b99ad025..00000000
--- a/registry/zookeeper/go.mod
+++ /dev/null
@@ -1,10 +0,0 @@
-module github.com/go-kratos/kratos/registry/zookeeper/v2
-
-go 1.16
-
-require (
-	github.com/go-kratos/kratos/v2 v2.0.5
-	github.com/go-zookeeper/zk v1.0.2
-)
-
-replace github.com/go-kratos/kratos/v2 => ../../../kratos


Test patch:
diff --git a/registry/consul/registry_test.go b/contrib/registry/consul/registry_test.go
similarity index 99%
rename from registry/consul/registry_test.go
rename to contrib/registry/consul/registry_test.go
index c17c297c..c95f6b02 100644
--- a/registry/consul/registry_test.go
+++ b/contrib/registry/consul/registry_test.go
@@ -1,4 +1,4 @@
-package registry
+package consul
 
 import (
 	"context"
diff --git a/registry/etcd/registry_test.go b/contrib/registry/etcd/registry_test.go
similarity index 99%
rename from registry/etcd/registry_test.go
rename to contrib/registry/etcd/registry_test.go
index 1bc35b0f..67e9d244 100644
--- a/registry/etcd/registry_test.go
+++ b/contrib/registry/etcd/registry_test.go
@@ -1,4 +1,4 @@
-package registry
+package etcd
 
 import (
 	"context"
diff --git a/registry/zookeeper/register_test.go b/contrib/registry/zookeeper/register_test.go
similarity index 98%
rename from registry/zookeeper/register_test.go
rename to contrib/registry/zookeeper/register_test.go
index 3ad17366..6e2f92c7 100644
--- a/registry/zookeeper/register_test.go
+++ b/contrib/registry/zookeeper/register_test.go
@@ -1,4 +1,4 @@
-package registry
+package zookeeper
 
 import (
 	"context"
diff --git a/examples/registry/registry_test.go b/examples/registry/registry_test.go
index 76eca40a..56c64d85 100644
--- a/examples/registry/registry_test.go
+++ b/examples/registry/registry_test.go
@@ -10,8 +10,8 @@ import (
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
 	pb "github.com/go-kratos/kratos/examples/helloworld/helloworld"
 
-	consulregistry "github.com/go-kratos/consul/registry"
-	etcdregistry "github.com/go-kratos/etcd/registry"
+	consulregistry "github.com/go-kratos/kratos/contrib/registry/consul/v2"
+	etcdregistry "github.com/go-kratos/kratos/contrib/registry/etcd/v2"
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/registry"
 	"github.com/go-kratos/kratos/v2/transport/grpc"
diff --git a/examples/tls/tls_test.go b/examples/tls/tls_test.go
index 518b1787..166f727b 100644
--- a/examples/tls/tls_test.go
+++ b/examples/tls/tls_test.go
@@ -9,7 +9,7 @@ import (
 	"testing"
 	"time"
 
-	etcdregistry "github.com/go-kratos/etcd/registry"
+	etcdregistry "github.com/go-kratos/kratos/contrib/registry/etcd/v2"
 	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
 	pb "github.com/go-kratos/kratos/examples/helloworld/helloworld"
 	"github.com/go-kratos/kratos/v2"