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doc.go
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doc.go
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/*
* Copyright 2019 Insolar Technologies
*
* 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.
*/
/*
Package instracer contains helpers for opencesus tracer.
Example:
import (
"github.com/insolar/insolar/configuration"
"github.com/insolar/insolar/log"
)
// on client side
//
entryvalue := "entryvalue"
ctx := context.Background()
jaegerflush = instracer.ShouldRegisterJaeger(ctx, "insolard", "localhost:6831", "")
ctx = instracer.SetBaggage(ctx, instracer.Entry{Key: "someentry", Value: entryvalue})
defer jaegerflush() // wait all trace data to send on jaeger server
// serialize clientctx
spanbindata := instracer.MustSerialize(ctx)
// send spanbindata on wire with request
// someSendMethod(ctxdata, request)
// on server side
//
// deserialized from wire
// spanbindata := someRecieverMethod()
ctx := context.Background()
instracer.MustDeserialize(spanbindata)
ctx = instracer.WithParentSpan(ctx, parentspan)
donefn := instracer.ShouldRegisterJaeger(ctx, "server", "localhost:6831", "")
defer donefn()
servctx, servspan := instracer.StartSpan(ctx, "server")
defer servspan.End()
// call subrequests with servctx, and use instracer.StartSpan
Hints:
Use environment variables for log level setup:
INSOLAR_TRACER_JAEGER_AGENTENDPOINT="localhost:6831"
How to run Jaeger locally:
docker run --rm --name jaeger \
-p 6831:6831/udp \
-p 16686:16686 \
jaegertracing/all-in-one:1.7 --log-level=debug
*/
package instracer