Cloud Run Golang Example

go.mod

module loremipsum.co.jp/column-cloudrun-go

go 1.18

main.go

package main

import (
	"encoding/json"
	"log"
	"net/http"
	"os"
)

func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { // <1>
		var res struct { // <2>
			Ok bool `json:"ok"`
		}

		res.Ok = true

		b, err := json.Marshal(&res) // <3>

		if err != nil { // <4>
			log.Println(err)
			w.WriteHeader(500)
			return
		}

		w.WriteHeader(200) // <5>
		w.Write(b) // <6>
	})

	port := os.Getenv("PORT") // <7>

	log.Printf("Listening on %v", port)
	log.Fatal(http.ListenAndServe(":"+port, nil)) // <8>
}

makefile

IMAGE = asia-northeast1-docker.pkg.dev/`gcloud config get-value project`/cloud-run/column-cloudrun-nodejs

build:
	pack build column-cloudrun-go --builder gcr.io/buildpacks/builder	

tag:
	docker image tag column-cloudrun-go $(IMAGE)

push:
	docker image push $(IMAGE)

deploy:
	gcloud run deploy column-cloudrun-go \
		--image $(IMAGE) \
		--region asia-northeast1 \
		--platform managed \
		--allow-unauthenticated

staging: build tag push deploy

delete:
	gcloud run services delete column-cloudrun-go \
		--region asia-northeast1 \
		--platform managed