opentelemetry-go/example

Example

HTTP

This is a simple example that demonstrates tracing http request from client to server. The example shows key aspects of tracing such as

• Root Span (on Client)
• Child Span (on Client)
• Child Span from a Remote Parent (on Server)
• SpanContext Propagation (from Client to Server)
• Span Events
• Span Attributes

Example uses

• open-telemetry SDK as trace instrumentation provider,
• httptrace plugin to facilitate tracing http request on client and server
• http trace_context propagation to propagate SpanContext on the wire.
• jaeger exporter to export spans to visualize and store them.

How to run?

Prequisites

• go 1.12 installed
• GOPATH is configured.

1 Download git repo

GO111MODULE="" go get -d go.opentelemetry.io

2 Start All-in-one Jaeger

docker run -d --name jaeger \
  -p 16686:16686 \
  -p 14268:14268 \
  jaegertracing/all-in-one:1.8

3 Start Server

cd $GOPATH/src/go.opentelemetry.io/example/http/
go run ./server/server.go

4 Start Client

cd $GOPATH/src/go.opentelemetry.io/example/http/
go run ./client/client.go

5 Check traces on Jaeger UI

Visit http://localhost:16686 with a web browser Click on 'Find' to see traces.

Sample Snapshot