Google Cloud Run 部署Knative Serverless 应用

水深无声 2022-01-30 23:25 201阅读 0赞

# Google Cloud Run 部署Knative Serverless 应用 #

> Google Cloud Run 是 Google 最近推出的基于容器运行的支持 Serverless 应用的服务，是 Knative 的Google Cloud 托管版本；和其他的 Serverless 如Google Cloud Functions, AWS Lambda 等相比，优点在于完全的基于容器，且不限语言

## 安装 [Cloud SDK][] ##

Cloud SDK 是 Google Cloud 的命令行工具，用于访问Google Cloud相关资源

具体平台的安装方式可以参考 [https://cloud.google.com/sdk/docs/quickstarts][https_cloud.google.com_sdk_docs_quickstarts]

## 创建应用，上传镜像 ##

以 Go 语言为例，创建一个应用，根据不同的请求返回不同的内容

*  main.go

package main
    
    import (
    	"encoding/json"
    	"fmt"
    	"net/http"
    	"net/url"
    )
    
    type CustomResponse struct { 
    	Code    int    `json:"code"`
    	Message string `json:"message"`
    }
    
    func main() { 
    	fmt.Println("Server started")
    	http.HandleFunc("/", rootHandler)
    	_ = http.ListenAndServe(":8080", nil)
    }
    
    func rootHandler(w http.ResponseWriter, r *http.Request) { 
    	fmt.Println("Start handler request")
    
    	queryForm, err := url.ParseQuery(r.URL.RawQuery)
    
    	w.Header().Set("Content-Type", "application/json")
    	message := ""
    
    	if err == nil && len(queryForm["message"]) > 0 { 
    		message = queryForm["message"][0]
    	} else { 
    		message = "Hello Go Server"
    	}
    
    	_ = json.NewEncoder(w).Encode(CustomResponse{ 200, message})
    	fmt.Println("Handler request completed")
    }

*  Dockerfile

FROM golang:1.12.3-alpine3.9
    RUN mkdir /app
    ADD . /app/
    WORKDIR /app
    RUN CGO_ENABLED=0 GOOS=linux go build -o main main.go
    EXPOSE 8080
    CMD ["/app/main"]

*  配置 [Google Container Registry][]

相关配置可以参考 [推送和拉取映像][Link 1]，需要注意的是需要一个项目 ID，这个 ID 可以在 [home/dashboard][home_dashboard] 下找到

![Google Porject][]

*  配置本地 Docker

gcloud auth configure-docker

*  构建镜像

docker build -t gcr.io/genial-post-128203/serverless .

*  推送镜像

docker push gcr.io/genial-post-128203/serverless

## 创建 Serverless 应用 ##

在[Cloud Run][] 页面选择创建服务

![创建服务][GoogleCloudRun2.png]

![服务详情][GoogleCloudRun3.png]

## 测试 ##

请求 URL [https://cloudserverless-pae2opltia-uc.a.run.app][https_cloudserverless-pae2opltia-uc.a.run.app]

*  不带参数

curl https://cloudserverless-pae2opltia-uc.a.run.app

{ "code":200,"message":"Hello Go Server"}

*  指定参数

curl https://cloudserverless-pae2opltia-uc.a.run.app?message=HelloWood

{ "code":200,"message":"HelloWood"}

--------------------

### 代码 ###

*  [https://github.com/helloworlde/google-cloud-run-go][https_github.com_helloworlde_google-cloud-run-go]

### 参考资料 ###

*  [Google Cloud Run详细介绍][Google Cloud Run]
 *  [推送和拉取映像][Link 2]
 *  [Using System Packages Tutorial][]

[Cloud SDK]: https://cloud.google.com/sdk/
[https_cloud.google.com_sdk_docs_quickstarts]: https://cloud.google.com/sdk/docs/quickstarts
[Google Container Registry]: https://console.cloud.google.com/gcr
[Link 1]: https://cloud.google.com/container-registry/docs/pushing-and-pulling
[home_dashboard]: https://console.cloud.google.com/home/dashboard
[Google Porject]: /images/20220131/878f30e37184483ba419ad31d275c74a.png
[Cloud Run]: https://console.cloud.google.com/run
[GoogleCloudRun2.png]: /images/20220131/f746fc221ccb4da89aa9d5eb4fc02791.png
[GoogleCloudRun3.png]: /images/20220131/f1662c04072146dcbb81d95636480208.png
[https_cloudserverless-pae2opltia-uc.a.run.app]: https://cloudserverless-pae2opltia-uc.a.run.app
[https_github.com_helloworlde_google-cloud-run-go]: https://github.com/helloworlde/google-cloud-run-go
[Google Cloud Run]: https://skyao.io/post/201905-google-cloud-run-detail/
[Link 2]: https://cloud.google.com/container-registry/docs/pushing-and-pulling?hl=zh-cn
[Using System Packages Tutorial]: https://cloud.google.com/run/docs/tutorials/system-packages