diff --git a/go.mod b/go.mod
index 714f2934f..d21eb3e15 100644
--- a/go.mod
+++ b/go.mod
@@ -23,6 +23,7 @@ require (
 	github.com/mattn/go-colorable v0.0.9 // indirect
 	github.com/mattn/go-isatty v0.0.4 // indirect
 	github.com/montanaflynn/stats v0.5.0
+	github.com/openzipkin/zipkin-go v0.2.0
 	github.com/pkg/errors v0.8.1
 	github.com/prometheus/client_golang v0.9.2
 	github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001 // indirect
diff --git a/go.sum b/go.sum
index b0075cdbd..72b08b006 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
+github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/aristanetworks/goarista v0.0.0-20190409234242-46f4bc7b73ef h1:ajsnF5qTstiBlP+V/mgh91zZfoKP477KfSmRoCoyYGU=
 github.com/aristanetworks/goarista v0.0.0-20190409234242-46f4bc7b73ef/go.mod h1:D/tb0zPVXnP7fmsLZjtdUhSsumbK/ij54UXjjVgMGxQ=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
@@ -18,6 +20,9 @@ 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=
 github.com/dgryski/go-farm v0.0.0-20190323231341-8198c7b169ec h1:sElGDs3V8VdCxH5tWi0ycWJzteOPLJ3HtItSSKI95PY=
 github.com/dgryski/go-farm v0.0.0-20190323231341-8198c7b169ec/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
+github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
+github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
+github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
 github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
@@ -47,6 +52,7 @@ github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/sync v0.0.0-20181108010431-42b317875d0f h1:vuwODIDRvDgwjIl6VTMf0c1Z9uVMUUxiu6UPUjiGhD4=
 github.com/golang/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:YCHYtYb9c8Q7XgYVYjmJBPtFPKx5QvOcPxHZWjldabE=
 github.com/golang/sys v0.0.0-20180905080454-ebe1bf3edb33 h1:GJexUf2QgFNvMR9sjJ1iqs+2TxZqJko+Muhnu04tPuU=
@@ -61,8 +67,11 @@ github.com/google/go-genproto v0.0.0-20180817151627-c66870c02cf8 h1:I9PuChzQA31g
 github.com/google/go-genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:3Rcd9jSoLVkV/osPrt5CogLvLiarfI8U9/x78NwhuDU=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/googleapis/google-cloud-go v0.26.0/go.mod h1:yJoOdPPE9UpqbamBhJvp7Ur6OUPPV4rUY3RnssPGNBA=
+github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
+github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
 github.com/grpc/grpc-go v1.20.1 h1:pk72GtSPpOdZDTkPneppDMGW10HYPC7RqNJT/JvUpV0=
 github.com/grpc/grpc-go v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -80,8 +89,15 @@ github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0j
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/montanaflynn/stats v0.5.0 h1:2EkzeTSqBB4V4bJwWrt5gIIrZmpJBcoIRGS2kWLgzmk=
 github.com/montanaflynn/stats v0.5.0/go.mod h1:wL8QJuTMNUDYhXwkmfOly8iTdp5TEcJFWZD2D7SIkUc=
+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
+github.com/openzipkin/zipkin-go v0.2.0 h1:33/f6xXB6YlOQ9tgTsXVOkdLCJsHTcZJnMy4DnSd6FU=
+github.com/openzipkin/zipkin-go v0.2.0/go.mod h1:NaW6tEwdmWMaCDZzg8sh+IBNOxHMPnhQw8ySjnjRyN4=
+github.com/pierrec/lz4 v1.0.2-0.20190131084431-473cd7ce01a1/go.mod h1:3/3N9NVKO0jef7pBehbT1qWhCMrIgbYNnFAZCqQ5LRc=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/profile v1.2.1/go.mod h1:hJw3o1OdXxsrSjjVksARp5W95eeEaEfptyVZyv6JUPA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v0.9.2 h1:awm861/B8OKDd2I/6o1dy3ra4BamzKhYOiGItCeZ740=
@@ -92,6 +108,7 @@ github.com/prometheus/common v0.0.0-20181126121408-4724e9255275 h1:PnBWHBf+6L0jO
 github.com/prometheus/common v0.0.0-20181126121408-4724e9255275/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a h1:9a8MnZMP0X2nLJdBg+pBmGgkJlSaKC2KaQmTCk1XDtE=
 github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
+github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
 github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001 h1:YDeskXpkNDhPdWN3REluVa46HQOVuVkjkd2sWnrABNQ=
 github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
@@ -103,6 +120,7 @@ github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726 h1:xT+JlYxNGqyT+XcU8
 github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726/go.mod h1:3yhqj7WBBfRhbBlzyOC3gUxftwsU0u8gqevxwIHQpMw=
 github.com/sirupsen/logrus v1.4.1 h1:GL2rEmy6nsikmW0r8opw9JIRScdMF5hA8cOYLH7In1k=
 github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
+github.com/streadway/amqp v0.0.0-20190404075320-75d898a42a94/go.mod h1:AZpEONHx3DKn8O/DFsRAY58/XVQiIPMTMB1SddzLXVw=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
@@ -112,16 +130,19 @@ github.com/tsuna/gohbase v0.0.0-20190201102810-d3184c1526df h1:jYiwqXfoRWU6pJMzC
 github.com/tsuna/gohbase v0.0.0-20190201102810-d3184c1526df/go.mod h1:3HfLQly3YNLGxNv/2YOfmz30vcjG9hbuME1GpxoLlGs=
 github.com/urfave/cli v1.20.0 h1:fDqGv3UG/4jbVl/QkFwEdddtEDjh/5Ov6X+0B/3bPaw=
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
-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=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
 golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
+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/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 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/go-playground/assert.v1 v1.2.1 h1:xoYuJVE7KT85PYWrN730RguIQO0ePzVRfFMXadIrXTM=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v9 v9.26.0 h1:2NPPsBpD0ZoxshmLWewQru8rWmbT5JqSzz9D1ZrAjYQ=
 gopkg.in/go-playground/validator.v9 v9.26.0/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/pkg/net/trace/config.go b/pkg/net/trace/config.go
index c43e09e71..7741dc147 100644
--- a/pkg/net/trace/config.go
+++ b/pkg/net/trace/config.go
@@ -58,7 +58,7 @@ func TracerFromEnvFlag() (Tracer, error) {
 		return nil, err
 	}
 	report := newReport(cfg.Network, cfg.Addr, time.Duration(cfg.Timeout), cfg.ProtocolVersion)
-	return newTracer(env.AppID, report, cfg), nil
+	return NewTracer(env.AppID, report, cfg.DisableSample), nil
 }
 
 // Init init trace report.
@@ -71,5 +71,5 @@ func Init(cfg *Config) {
 		}
 	}
 	report := newReport(cfg.Network, cfg.Addr, time.Duration(cfg.Timeout), cfg.ProtocolVersion)
-	SetGlobalTracer(newTracer(env.AppID, report, cfg))
+	SetGlobalTracer(NewTracer(env.AppID, report, cfg.DisableSample))
 }
diff --git a/pkg/net/trace/dapper.go b/pkg/net/trace/dapper.go
index 5a1675ddf..03048da19 100644
--- a/pkg/net/trace/dapper.go
+++ b/pkg/net/trace/dapper.go
@@ -8,21 +8,21 @@ import (
 )
 
 const (
-	_maxLevel    = 64
+	_maxLevel = 64
+	// hard code reset probability at 0.00025, 1/4000
 	_probability = 0.00025
 )
 
-func newTracer(serviceName string, report reporter, cfg *Config) Tracer {
-	// hard code reset probability at 0.00025, 1/4000
-	cfg.Probability = _probability
-	sampler := newSampler(cfg.Probability)
+// NewTracer new a tracer.
+func NewTracer(serviceName string, report reporter, disableSample bool) Tracer {
+	sampler := newSampler(_probability)
 
 	// default internal tags
 	tags := extendTag()
 	stdlog := log.New(os.Stderr, "trace", log.LstdFlags)
 	return &dapper{
-		cfg:         cfg,
-		serviceName: serviceName,
+		serviceName:   serviceName,
+		disableSample: disableSample,
 		propagators: map[interface{}]propagator{
 			HTTPFormat: httpPropagator{},
 			GRPCFormat: grpcPropagator{},
@@ -30,20 +30,20 @@ func newTracer(serviceName string, report reporter, cfg *Config) Tracer {
 		reporter: report,
 		sampler:  sampler,
 		tags:     tags,
-		pool:     &sync.Pool{New: func() interface{} { return new(span) }},
+		pool:     &sync.Pool{New: func() interface{} { return new(Span) }},
 		stdlog:   stdlog,
 	}
 }
 
 type dapper struct {
-	cfg         *Config
-	serviceName string
-	tags        []Tag
-	reporter    reporter
-	propagators map[interface{}]propagator
-	pool        *sync.Pool
-	stdlog      *log.Logger
-	sampler     sampler
+	serviceName   string
+	disableSample bool
+	tags          []Tag
+	reporter      reporter
+	propagators   map[interface{}]propagator
+	pool          *sync.Pool
+	stdlog        *log.Logger
+	sampler       sampler
 }
 
 func (d *dapper) New(operationName string, opts ...Option) Trace {
@@ -54,7 +54,7 @@ func (d *dapper) New(operationName string, opts ...Option) Trace {
 	traceID := genID()
 	var sampled bool
 	var probability float32
-	if d.cfg.DisableSample {
+	if d.disableSample {
 		sampled = true
 		probability = 1
 	} else {
@@ -160,7 +160,7 @@ func (d *dapper) Close() error {
 	return d.reporter.Close()
 }
 
-func (d *dapper) report(sp *span) {
+func (d *dapper) report(sp *Span) {
 	if sp.context.isSampled() {
 		if err := d.reporter.WriteSpan(sp); err != nil {
 			d.stdlog.Printf("marshal trace span error: %s", err)
@@ -169,7 +169,7 @@ func (d *dapper) report(sp *span) {
 	d.putSpan(sp)
 }
 
-func (d *dapper) putSpan(sp *span) {
+func (d *dapper) putSpan(sp *Span) {
 	if len(sp.tags) > 32 {
 		sp.tags = nil
 	}
@@ -179,8 +179,8 @@ func (d *dapper) putSpan(sp *span) {
 	d.pool.Put(sp)
 }
 
-func (d *dapper) getSpan() *span {
-	sp := d.pool.Get().(*span)
+func (d *dapper) getSpan() *Span {
+	sp := d.pool.Get().(*Span)
 	sp.dapper = d
 	sp.childs = 0
 	sp.tags = sp.tags[:0]
diff --git a/pkg/net/trace/dapper_test.go b/pkg/net/trace/dapper_test.go
index f5e3ab7da..ce9517c7c 100644
--- a/pkg/net/trace/dapper_test.go
+++ b/pkg/net/trace/dapper_test.go
@@ -10,10 +10,10 @@ import (
 )
 
 type mockReport struct {
-	sps []*span
+	sps []*Span
 }
 
-func (m *mockReport) WriteSpan(sp *span) error {
+func (m *mockReport) WriteSpan(sp *Span) error {
 	m.sps = append(m.sps, sp)
 	return nil
 }
@@ -25,8 +25,8 @@ func (m *mockReport) Close() error {
 func TestDapperPropagation(t *testing.T) {
 	t.Run("test HTTP progagation", func(t *testing.T) {
 		report := &mockReport{}
-		t1 := newTracer("service1", report, &Config{DisableSample: true})
-		t2 := newTracer("service2", report, &Config{DisableSample: true})
+		t1 := NewTracer("service1", report, true)
+		t2 := NewTracer("service2", report, true)
 		sp1 := t1.New("opt_1")
 		sp2 := sp1.Fork("", "opt_client")
 		header := make(http.Header)
@@ -49,8 +49,8 @@ func TestDapperPropagation(t *testing.T) {
 	})
 	t.Run("test gRPC progagation", func(t *testing.T) {
 		report := &mockReport{}
-		t1 := newTracer("service1", report, &Config{DisableSample: true})
-		t2 := newTracer("service2", report, &Config{DisableSample: true})
+		t1 := NewTracer("service1", report, true)
+		t2 := NewTracer("service2", report, true)
 		sp1 := t1.New("opt_1")
 		sp2 := sp1.Fork("", "opt_client")
 		md := make(metadata.MD)
@@ -73,14 +73,14 @@ func TestDapperPropagation(t *testing.T) {
 	})
 	t.Run("test normal", func(t *testing.T) {
 		report := &mockReport{}
-		t1 := newTracer("service1", report, &Config{Probability: 0.000000001})
+		t1 := NewTracer("service1", report, true)
 		sp1 := t1.New("test123")
 		sp1.Finish(nil)
 	})
 	t.Run("test debug progagation", func(t *testing.T) {
 		report := &mockReport{}
-		t1 := newTracer("service1", report, &Config{})
-		t2 := newTracer("service2", report, &Config{})
+		t1 := NewTracer("service1", report, true)
+		t2 := NewTracer("service2", report, true)
 		sp1 := t1.New("opt_1", EnableDebug())
 		sp2 := sp1.Fork("", "opt_client")
 		header := make(http.Header)
@@ -106,7 +106,7 @@ func TestDapperPropagation(t *testing.T) {
 func BenchmarkSample(b *testing.B) {
 	err := fmt.Errorf("test error")
 	report := &mockReport{}
-	t1 := newTracer("service1", report, &Config{})
+	t1 := NewTracer("service1", report, true)
 	for i := 0; i < b.N; i++ {
 		sp1 := t1.New("test_opt1")
 		sp1.SetTag(TagString("test", "123"))
@@ -122,7 +122,7 @@ func BenchmarkSample(b *testing.B) {
 func BenchmarkDisableSample(b *testing.B) {
 	err := fmt.Errorf("test error")
 	report := &mockReport{}
-	t1 := newTracer("service1", report, &Config{DisableSample: true})
+	t1 := NewTracer("service1", report, true)
 	for i := 0; i < b.N; i++ {
 		sp1 := t1.New("test_opt1")
 		sp1.SetTag(TagString("test", "123"))
diff --git a/pkg/net/trace/marshal.go b/pkg/net/trace/marshal.go
index 6324694e0..2d3f58226 100644
--- a/pkg/net/trace/marshal.go
+++ b/pkg/net/trace/marshal.go
@@ -20,14 +20,14 @@ var (
 	errSpanVersion = errs.New("trace: marshal not support version")
 )
 
-func marshalSpan(sp *span, version int32) ([]byte, error) {
+func marshalSpan(sp *Span, version int32) ([]byte, error) {
 	if version == protoVersion1 {
 		return marshalSpanV1(sp)
 	}
 	return nil, errSpanVersion
 }
 
-func marshalSpanV1(sp *span) ([]byte, error) {
+func marshalSpanV1(sp *Span) ([]byte, error) {
 	protoSpan := new(protogen.Span)
 	protoSpan.Version = protoVersion1
 	protoSpan.ServiceName = sp.dapper.serviceName
diff --git a/pkg/net/trace/marshal_test.go b/pkg/net/trace/marshal_test.go
index 30fe50cc9..3c4d5831d 100644
--- a/pkg/net/trace/marshal_test.go
+++ b/pkg/net/trace/marshal_test.go
@@ -6,8 +6,8 @@ import (
 
 func TestMarshalSpanV1(t *testing.T) {
 	report := &mockReport{}
-	t1 := newTracer("service1", report, &Config{DisableSample: true})
-	sp1 := t1.New("opt_test").(*span)
+	t1 := NewTracer("service1", report, true)
+	sp1 := t1.New("opt_test").(*Span)
 	sp1.SetLog(Log("hello", "test123"))
 	sp1.SetTag(TagString("tag1", "hell"), TagBool("booltag", true), TagFloat64("float64tag", 3.14159))
 	sp1.Finish(nil)
diff --git a/pkg/net/trace/report.go b/pkg/net/trace/report.go
index e9b8e4122..6bce7ea28 100644
--- a/pkg/net/trace/report.go
+++ b/pkg/net/trace/report.go
@@ -20,7 +20,7 @@ const (
 
 // reporter trace reporter.
 type reporter interface {
-	WriteSpan(sp *span) error
+	WriteSpan(sp *Span) error
 	Close() error
 }
 
@@ -64,7 +64,7 @@ func (c *connReport) daemon() {
 	c.done <- struct{}{}
 }
 
-func (c *connReport) WriteSpan(sp *span) error {
+func (c *connReport) WriteSpan(sp *Span) error {
 	data, err := marshalSpan(sp, c.version)
 	if err != nil {
 		return err
diff --git a/pkg/net/trace/span.go b/pkg/net/trace/span.go
index 74d9eb756..f943f84a7 100644
--- a/pkg/net/trace/span.go
+++ b/pkg/net/trace/span.go
@@ -13,9 +13,10 @@ const (
 	_maxLogs   = 256
 )
 
-var _ Trace = &span{}
+var _ Trace = &Span{}
 
-type span struct {
+// Span is a trace span.
+type Span struct {
 	dapper        *dapper
 	context       spanContext
 	operationName string
@@ -26,11 +27,39 @@ type span struct {
 	childs        int
 }
 
-func (s *span) TraceID() string {
+func (s *Span) Name() string {
+	return s.operationName
+}
+
+func (s *Span) StartTime() time.Time {
+	return s.startTime
+}
+
+func (s *Span) Duration() time.Duration {
+	return s.duration
+}
+
+func (s *Span) TraceID() string {
 	return s.context.String()
 }
 
-func (s *span) Fork(serviceName, operationName string) Trace {
+func (s *Span) Tid() uint64 {
+	return s.context.traceID
+}
+
+func (s *Span) SpanID() uint64 {
+	return s.context.spanID
+}
+
+func (s *Span) ParentID() uint64 {
+	return s.context.parentID
+}
+
+func (s *Span) Tags() []Tag {
+	return s.tags
+}
+
+func (s *Span) Fork(serviceName, operationName string) Trace {
 	if s.childs > _maxChilds {
 		// if child span more than max childs set return noopspan
 		return noopspan{}
@@ -40,11 +69,11 @@ func (s *span) Fork(serviceName, operationName string) Trace {
 	return s.dapper.newSpanWithContext(operationName, s.context).SetTag(TagString(TagSpanKind, "client"))
 }
 
-func (s *span) Follow(serviceName, operationName string) Trace {
+func (s *Span) Follow(serviceName, operationName string) Trace {
 	return s.Fork(serviceName, operationName).SetTag(TagString(TagSpanKind, "producer"))
 }
 
-func (s *span) Finish(perr *error) {
+func (s *Span) Finish(perr *error) {
 	s.duration = time.Since(s.startTime)
 	if perr != nil && *perr != nil {
 		err := *perr
@@ -57,7 +86,7 @@ func (s *span) Finish(perr *error) {
 	s.dapper.report(s)
 }
 
-func (s *span) SetTag(tags ...Tag) Trace {
+func (s *Span) SetTag(tags ...Tag) Trace {
 	if !s.context.isSampled() && !s.context.isDebug() {
 		return s
 	}
@@ -72,7 +101,7 @@ func (s *span) SetTag(tags ...Tag) Trace {
 
 // LogFields is an efficient and type-checked way to record key:value
 // NOTE current unsupport
-func (s *span) SetLog(logs ...LogField) Trace {
+func (s *Span) SetLog(logs ...LogField) Trace {
 	if !s.context.isSampled() && !s.context.isDebug() {
 		return s
 	}
@@ -85,7 +114,7 @@ func (s *span) SetLog(logs ...LogField) Trace {
 	return s
 }
 
-func (s *span) setLog(logs ...LogField) Trace {
+func (s *Span) setLog(logs ...LogField) Trace {
 	protoLog := &protogen.Log{
 		Timestamp: time.Now().UnixNano(),
 		Fields:    make([]*protogen.Field, len(logs)),
@@ -98,15 +127,15 @@ func (s *span) setLog(logs ...LogField) Trace {
 }
 
 // Visit visits the k-v pair in trace, calling fn for each.
-func (s *span) Visit(fn func(k, v string)) {
+func (s *Span) Visit(fn func(k, v string)) {
 	fn(KratosTraceID, s.context.String())
 }
 
 // SetTitle reset trace title
-func (s *span) SetTitle(operationName string) {
+func (s *Span) SetTitle(operationName string) {
 	s.operationName = operationName
 }
 
-func (s *span) String() string {
+func (s *Span) String() string {
 	return s.context.String()
 }
diff --git a/pkg/net/trace/span_test.go b/pkg/net/trace/span_test.go
index 17a3cef4c..d91c6b358 100644
--- a/pkg/net/trace/span_test.go
+++ b/pkg/net/trace/span_test.go
@@ -12,14 +12,14 @@ import (
 
 func TestSpan(t *testing.T) {
 	report := &mockReport{}
-	t1 := newTracer("service1", report, &Config{DisableSample: true})
+	t1 := NewTracer("service1", report, true)
 	t.Run("test span string", func(t *testing.T) {
-		sp1 := t1.New("testfinish").(*span)
+		sp1 := t1.New("testfinish").(*Span)
 		assert.NotEmpty(t, fmt.Sprint(sp1))
 	})
 	t.Run("test fork", func(t *testing.T) {
-		sp1 := t1.New("testfork").(*span)
-		sp2 := sp1.Fork("xxx", "opt_2").(*span)
+		sp1 := t1.New("testfork").(*Span)
+		sp2 := sp1.Fork("xxx", "opt_2").(*Span)
 		assert.Equal(t, sp1.context.traceID, sp2.context.traceID)
 		assert.Equal(t, sp1.context.spanID, sp2.context.parentID)
 		t.Run("test max fork", func(t *testing.T) {
@@ -39,14 +39,14 @@ func TestSpan(t *testing.T) {
 	})
 	t.Run("test finish", func(t *testing.T) {
 		t.Run("test finish ok", func(t *testing.T) {
-			sp1 := t1.New("testfinish").(*span)
+			sp1 := t1.New("testfinish").(*Span)
 			time.Sleep(time.Millisecond)
 			sp1.Finish(nil)
 			assert.True(t, sp1.startTime.Unix() > 0)
 			assert.True(t, sp1.duration > time.Microsecond)
 		})
 		t.Run("test finish error", func(t *testing.T) {
-			sp1 := t1.New("testfinish").(*span)
+			sp1 := t1.New("testfinish").(*Span)
 			time.Sleep(time.Millisecond)
 			err := fmt.Errorf("🍻")
 			sp1.Finish(&err)
@@ -71,7 +71,7 @@ func TestSpan(t *testing.T) {
 			assert.True(t, messageLog)
 		})
 		t.Run("test finish error stack", func(t *testing.T) {
-			sp1 := t1.New("testfinish").(*span)
+			sp1 := t1.New("testfinish").(*Span)
 			time.Sleep(time.Millisecond)
 			err := fmt.Errorf("🍻")
 			err = errors.WithStack(err)
@@ -87,7 +87,7 @@ func TestSpan(t *testing.T) {
 			assert.True(t, ok, "LogStack set")
 		})
 		t.Run("test too many tags", func(t *testing.T) {
-			sp1 := t1.New("testfinish").(*span)
+			sp1 := t1.New("testfinish").(*Span)
 			for i := 0; i < 1024; i++ {
 				sp1.SetTag(Tag{Key: strconv.Itoa(i), Value: "hello"})
 			}
@@ -96,7 +96,7 @@ func TestSpan(t *testing.T) {
 			assert.Equal(t, sp1.tags[_maxTags].Value, "too many tags")
 		})
 		t.Run("test too many logs", func(t *testing.T) {
-			sp1 := t1.New("testfinish").(*span)
+			sp1 := t1.New("testfinish").(*Span)
 			for i := 0; i < 1024; i++ {
 				sp1.SetLog(LogField{Key: strconv.Itoa(i), Value: "hello"})
 			}
diff --git a/pkg/net/trace/util_test.go b/pkg/net/trace/util_test.go
index c6223bd84..6d98908a1 100644
--- a/pkg/net/trace/util_test.go
+++ b/pkg/net/trace/util_test.go
@@ -9,7 +9,7 @@ import (
 
 func TestFromContext(t *testing.T) {
 	report := &mockReport{}
-	t1 := newTracer("service1", report, &Config{DisableSample: true})
+	t1 := NewTracer("service1", report, true)
 	sp1 := t1.New("test123")
 	ctx := context.Background()
 	ctx = NewContext(ctx, sp1)
diff --git a/pkg/net/trace/zipkin/config.go b/pkg/net/trace/zipkin/config.go
new file mode 100644
index 000000000..37e3037e8
--- /dev/null
+++ b/pkg/net/trace/zipkin/config.go
@@ -0,0 +1,30 @@
+package zipkin
+
+import (
+	"time"
+
+	"github.com/bilibili/kratos/pkg/conf/env"
+	"github.com/bilibili/kratos/pkg/net/trace"
+	xtime "github.com/bilibili/kratos/pkg/time"
+)
+
+// Config config.
+// url should be the endpoint to send the spans to, e.g.
+// http://localhost:9411/api/v2/spans
+type Config struct {
+	Endpoint      string         `dsn:"endpoint"`
+	BatchSize     int            `dsn:"query.batch_size,100"`
+	Timeout       xtime.Duration `dsn:"query.timeout,200ms"`
+	DisableSample bool           `dsn:"query.disable_sample"`
+}
+
+// Init init trace report.
+func Init(c *Config) {
+	if c.BatchSize == 0 {
+		c.BatchSize = 100
+	}
+	if c.Timeout == 0 {
+		c.Timeout = xtime.Duration(200 * time.Millisecond)
+	}
+	trace.SetGlobalTracer(trace.NewTracer(env.AppID, newReport(c), c.DisableSample))
+}
diff --git a/pkg/net/trace/zipkin/zipkin.go b/pkg/net/trace/zipkin/zipkin.go
new file mode 100644
index 000000000..8cd1532b0
--- /dev/null
+++ b/pkg/net/trace/zipkin/zipkin.go
@@ -0,0 +1,64 @@
+package zipkin
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/bilibili/kratos/pkg/net/trace"
+	"github.com/openzipkin/zipkin-go/model"
+	"github.com/openzipkin/zipkin-go/reporter"
+	"github.com/openzipkin/zipkin-go/reporter/http"
+)
+
+type report struct {
+	rpt reporter.Reporter
+}
+
+func newReport(c *Config) *report {
+	return &report{
+		rpt: http.NewReporter(c.Endpoint,
+			http.Timeout(time.Duration(c.Timeout)),
+			http.BatchSize(c.BatchSize),
+		),
+	}
+}
+
+// WriteSpan write a trace span to queue.
+func (r *report) WriteSpan(raw *trace.Span) (err error) {
+	traceID := model.TraceID{Low: raw.Tid()}
+	spanID := model.ID(raw.SpanID())
+	parentID := model.ID(raw.ParentID())
+	span := model.SpanModel{
+		SpanContext: model.SpanContext{
+			TraceID:  traceID,
+			ID:       spanID,
+			ParentID: &parentID,
+		},
+		Name:      raw.Name(),
+		Timestamp: raw.StartTime(),
+		Duration:  raw.Duration(),
+		Tags:      make(map[string]string, len(raw.Tags())),
+	}
+	for _, tag := range raw.Tags() {
+		switch tag.Key {
+		case trace.TagSpanKind:
+			span.Kind = model.Kind(tag.Value.(string))
+		case trace.TagPeerService:
+			span.LocalEndpoint = &model.Endpoint{ServiceName: tag.Value.(string)}
+		default:
+			v, ok := tag.Value.(string)
+			if ok {
+				span.Tags[tag.Key] = v
+			} else {
+				span.Tags[tag.Key] = fmt.Sprint(v)
+			}
+		}
+	}
+	r.rpt.Send(span)
+	return
+}
+
+// Close close the report.
+func (r *report) Close() error {
+	return r.rpt.Close()
+}
diff --git a/pkg/net/trace/zipkin/zipkin_test.go b/pkg/net/trace/zipkin/zipkin_test.go
new file mode 100644
index 000000000..34435b5d5
--- /dev/null
+++ b/pkg/net/trace/zipkin/zipkin_test.go
@@ -0,0 +1,33 @@
+package zipkin
+
+import (
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/bilibili/kratos/pkg/net/trace"
+	xtime "github.com/bilibili/kratos/pkg/time"
+)
+
+func TestZipkin(t *testing.T) {
+	c := &Config{
+		Endpoint:  "http://127.0.0.1:9411/api/v2/spans",
+		Timeout:   xtime.Duration(time.Second * 5),
+		BatchSize: 100,
+	}
+	report := newReport(c)
+	t1 := trace.NewTracer("service1", report, true)
+	t2 := trace.NewTracer("service2", report, true)
+	sp1 := t1.New("opt_1")
+	sp2 := sp1.Fork("", "opt_client")
+	header := make(http.Header)
+	t1.Inject(sp2, trace.HTTPFormat, header)
+	sp3, err := t2.Extract(trace.HTTPFormat, header)
+	if err != nil {
+		t.Fatal(err)
+	}
+	sp3.Finish(nil)
+	sp2.Finish(nil)
+	sp1.Finish(nil)
+	report.Close()
+}