Google cloud logging consolidated logging in golang

server.go

package main

//https://github.com/GoogleCloudPlatform/google-cloud-go/issues/720#issuecomment-320798620

import (
	"fmt"
	"log"
	"net/http"
	"time"

	"cloud.google.com/go/logging"
	"golang.org/x/net/context"
	mrpb "google.golang.org/genproto/googleapis/api/monitoredres"
)

var (
	client *logging.Client
)

const (
	httpport = ":8080"
)


func fronthandler(w http.ResponseWriter, r *http.Request) {
	log.Println("Main Handler")
        s := r.Header.Get("X-Cloud-Trace-Context")
        log.Println("X-Cloud-Trace-Context: %s",s)

	parentLogger := client.Logger(
		"appengine.googleapis.com/request_log",
		logging.CommonLabels(map[string]string{
			"appengine.googleapis.com/trace_id": s,
		}),
		logging.CommonResource(&mrpb.MonitoredResource{
			Labels: map[string]string{
				"module_id":  "default",
				"project_id": "your_project",
				"version_id": "1",
			},
			Type: "gae_app",
		}),
	)


        childLogger := client.Logger(
                "my-log",
                logging.CommonLabels(map[string]string{
                        "appengine.googleapis.com/trace_id": s,
                }),
                logging.CommonResource(&mrpb.MonitoredResource{
                        Labels: map[string]string{
                                "module_id":  "default",
                                "project_id": "your_project",
                                "version_id": "1",
                        },
                        Type: "gae_app",
                }),
        )

	ent2 := logging.Entry{
		Timestamp: time.Now(),
		Severity:  logging.Debug,
		Trace:     r.Header.Get("X-Cloud-Trace-Context"),
		Payload: ">>>>>>>>>>>>>>>>>  Child Log message #1",
	}
	childLogger.Log(ent2)


	ent3 := logging.Entry{
		Timestamp: time.Now(),
		Severity:  logging.Debug,
		Trace:     r.Header.Get("X-Cloud-Trace-Context"),
		Payload: ">>>>>>>>>>>>>>>>>  Child Log message #2",
	}
	childLogger.Log(ent3)

	ent := logging.Entry{
		HTTPRequest: &logging.HTTPRequest{
			Request: r,
		},
		Timestamp: time.Now(),
		Severity:  logging.Debug,
		Trace:     r.Header.Get("X-Cloud-Trace-Context"),
	}
	parentLogger.Log(ent)

	fmt.Fprint(w, "hello world")
}

func healthhandler(w http.ResponseWriter, r *http.Request) {
	//log.Println("heathcheck...")
	fmt.Fprint(w, "ok")
}

func main() {

	ctx := context.Background()
	client, _ = logging.NewClient(ctx, "your_project")
	http.HandleFunc("/", fronthandler)
	http.HandleFunc("/_ah/health", healthhandler)

	log.Printf("Starting server on %v", httpport)
	srv := &http.Server{
		Addr:     httpport,
	}
	srv.ListenAndServe()
}

// For GCF:
	/*
			   logName:  "projects/your_project/logs/cloudfunctions.googleapis.com/cloud-functions"
		           labels: {
		  	      execution_id:  "4xsh8lstbb2r"
		           }
			   resource: {
			    labels: {
			     function_name:  "your_function"
			     project_id:  "your_project"
			     region:  "us-central1"
			    }
			    type:  "cloud_function"
			   }
	*/