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Zipkin exporter (#495)
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* Add zipkin exporter

The zipkin exporter implements the SpanBatcher interface. It follows
the current-at-the-time-of-writing document about conversion from
OpenTelemetry span data to Zipkin spans. Which means that endpoint
information is not yet filled.

* Fix typo in docs

* Add a zipkin example

This sends span information to a locally running zipkin collector.
Currently I have a problem getting the collector to show me the spans
after accepting them with HTTP 202. Not sure if this is because of
missing endpoint information.

* Make gitignore consistent

The fixed paths should be prefixed with a slash. The "relative" paths
mean that git will ignore all the files that end with the path.

* Add tests for zipkin exporter
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krnowak authored Mar 11, 2020
1 parent 4047c08 commit d9210f5
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5 changes: 3 additions & 2 deletions .gitignore
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Expand Up @@ -9,10 +9,11 @@ Thumbs.db
coverage.*

/example/basic/basic
example/grpc/client/client
example/grpc/server/server
/example/grpc/client/client
/example/grpc/server/server
/example/http/client/client
/example/http/server/server
/example/jaeger/jaeger
/example/namedtracer/namedtracer
/example/prometheus/prometheus
/example/zipkin/zipkin
16 changes: 16 additions & 0 deletions example/zipkin/README.md
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# Zipkin Exporter Example

Sends spans to zipkin collector.

### Run collector

```sh
docker run -d -p 9411:9411 openzipkin/zipkin
```

### Run client

```sh
go build .
./zipkin
```
13 changes: 13 additions & 0 deletions example/zipkin/go.mod
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module go.opentelemetry.go/otel/example/zipkin

go 1.13

replace (
go.opentelemetry.io/otel => ../..
go.opentelemetry.io/otel/exporters/trace/zipkin => ../../exporters/trace/zipkin
)

require (
go.opentelemetry.io/otel v0.2.3
go.opentelemetry.io/otel/exporters/trace/zipkin v0.2.3
)
104 changes: 104 additions & 0 deletions example/zipkin/go.sum
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cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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github.com/DataDog/sketches-go v0.0.0-20190923095040-43f19ad77ff7/go.mod h1:Q5DbzQ+3AkgGwymQO7aZFNP7ns2lZKGtvRBzRXfdi60=
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=
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github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
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github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
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golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
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golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
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google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8=
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google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLDdAQM=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
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gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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=
79 changes: 79 additions & 0 deletions example/zipkin/main.go
Original file line number Diff line number Diff line change
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// Copyright 2020, OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Command zipkin is an example program that creates spans
// and uploads to openzipkin collector.
package main

import (
"context"
"log"
"os"
"time"

"go.opentelemetry.io/otel/api/global"

"go.opentelemetry.io/otel/exporters/trace/zipkin"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)

var logger = log.New(os.Stderr, "zipkin-example", log.Ldate|log.Ltime|log.Llongfile)

// initTracer creates a new trace provider instance and registers it as global trace provider.
func initTracer() {
// Create Zipkin Exporter
exporter, err := zipkin.NewExporter(
"http://localhost:9411/api/v2/spans",
zipkin.WithLogger(logger),
)
if err != nil {
log.Fatal(err)
}

// For demoing purposes, always sample. In a production application, you should
// configure this to a trace.ProbabilitySampler set at the desired
// probability.
tp, err := sdktrace.NewProvider(
sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}),
sdktrace.WithBatcher(exporter,
sdktrace.WithScheduleDelayMillis(5),
sdktrace.WithMaxExportBatchSize(10),
),
)
if err != nil {
log.Fatal(err)
}
global.SetTraceProvider(tp)
}

func main() {
initTracer()

ctx := context.Background()

tr := global.TraceProvider().Tracer("component-main")
ctx, span := tr.Start(ctx, "foo")
<-time.After(6 * time.Millisecond)
bar(ctx)
<-time.After(6 * time.Millisecond)
span.End()
<-time.After(24 * time.Millisecond)
}

func bar(ctx context.Context) {
tr := global.TraceProvider().Tracer("component-bar")
_, span := tr.Start(ctx, "bar")
<-time.After(6 * time.Millisecond)
span.End()
}
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