https://github.com/BinWang-sh/opentracing-go

https://github.com/BinWang-sh/opentracing-go

Last synced: 7 days ago
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• Host: GitHub
• URL: https://github.com/BinWang-sh/opentracing-go
• Owner: BinWang-sh
• Created: 2019-12-12T12:34:31.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2019-12-16T02:55:23.000Z (almost 5 years ago)
• Last Synced: 2024-08-02T15:18:12.153Z (3 months ago)
• Language: Go
• Size: 39.1 KB
• Stars: 7
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
An example of using opentracing.

This example shows how to trace over the process boundaries and RPC calls.

Jaeger start

    docker run \

    -p 5775:5775/udp \

    -p 16686:16686 \

    -p 6831:6831/udp \

    -p 6832:6832/udp \

    -p 5778:5778 \

    -p 14268:14268 \

    jaegertracing/all-in-one:latest

    

Client side

<1>import

    import (

        "github.com/opentracing/opentracing-go/ext"

    )

    

<2>inject

    ext.SpanKindRPCClient.Set(reqSpan)

    ext.HTTPUrl.Set(reqSpan, reqURL)

    ext.HTTPMethod.Set(reqSpan, "GET")

    span.Tracer().Inject(

        span.Context(),

        opentracing.HTTPHeaders,

        opentracing.HTTPHeadersCarrier(req.Header),

    )

Server side

<1>import

    import (

        opentracing "github.com/opentracing/opentracing-go"

        "github.com/opentracing/opentracing-go/ext"

        otlog "github.com/opentracing/opentracing-go/log"

        "github.com/yurishkuro/opentracing-tutorial/go/lib/tracing"

    )

<2>Extrace span context from incoming http request

    

    spanCtx, _ := tracer.Extract(opentracing.HTTPHeaders, opentracing.HTTPHeadersCarrier(r.Header))

<3>Creates a ChildOf reference to the passed spanCtx as well as sets a span.kind=server tag on the new span by using a special option RPCServerOption

    

    span := tracer.StartSpan("format", ext.RPCServerOption(spanCtx))

    defer span.Finish()