Sample for simple log tracing via zerolog

main.go

package main

import (
	"context"

	"github.com/rs/zerolog"
	"github.com/rs/zerolog/log"
)

type traceContextKeyType int

const currentSpanKey traceContextKeyType = iota

type TracingHook struct{}

func (h TracingHook) Run(e *zerolog.Event, level zerolog.Level, msg string) {
	ctx := e.GetCtx()
	if traceId, ok := ctx.Value(currentSpanKey).(string); ok {
		e.Str("trace-id", traceId)
	}
}

func main() {
	zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
	log := log.Hook(TracingHook{})
	ctx := context.WithValue(context.Background(), currentSpanKey, "1234567890")

	log.Info().Ctx(ctx).Msg("Hello, World!")
}