opentelemetry-go的分布式追踪

调试

自制一个propagator实现propagation.TextMapPropagator接口

import (
    propagation "go.opentelemetry.io/otel/propagation"
)

type myPropagator struct {
}

func (ppgt myPropagator) Inject(ctx context.Context, carrier propagation.TextMapCarrier) {
}

func (ppgt myPropagator) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context {
    sb := strings.Builder{}
    for _, key := range carrier.Keys() {
        value := carrier.Get(key)
        sb.WriteString(key)
        sb.WriteString(":")
        sb.WriteString(value)
        sb.WriteString("; ")
    }
    log.Debug(sb.String())
    return ctx
}

func (ppgt myPropagator) Fields() []string {
    return []string{}
}

把它与别的propagator组合起来

pgt := propagation.NewCompositeTextMapPropagator(
    myPropagator{},
    sentryotel.NewSentryPropagator(),
)
otel.SetTextMapPropagator(pgt)