aws lambda in golang

@k_nishijima

AWS Lambda in Golang

JAWS-UG 201608 @k_nishijima

The Go gopher was designed by Renee French. (http://reneefrench.blogspot.com/) The design is licensed under the Creative Commons 3.0 Attributions license.

http://reneefrench.blogspot.com/

@k_nishijima

Go

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GoLambda

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/ https://www.r3it.com100%

okinawa.go JAWSUG

Facebook/Twitter

@k_nishijima

nishijima.koichiro

https://www.r3it.com

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AWSGolang Lambda

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AWSGo7

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AWSGo

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AWS SDK for Go https://aws.amazon.com/jp/sdk-for-go/

https://github.com/aws/aws-sdk-go

Lambda Node.js (JavaScript)Python Java (Java 8 )https://aws.amazon.com/jp/lambda/faqs/

https://aws.amazon.com/jp/sdk-for-go/https://github.com/aws/aws-sdk-gohttps://aws.amazon.com/jp/lambda/faqs/

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LambdaGo

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APEX : Lambdahttp://apex.run/https://github.com/apex/apex

Simple API Gateway : API Gateway https://github.com/horike37/simple-api-gateway

Terraform : https://www.terraform.io/

http://apex.run/https://github.com/apex/apexhttps://github.com/horike37/simple-api-gatewayhttps://www.terraform.io/

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Lambda

Terraform

Node.jsshimGoGoLambda

APEX

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Go

(^_^;)

APEX

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Simple API Gateway

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API GatewayCLI

API

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Simple API Gateway

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HashiCorp

JSON/

IAMLambda

Terraform

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LambdaWeb API

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DynamoDB

API

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Slack

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https://github.com/k-nishijima/lambda-handson-jawsug-okinawa-201608

infraTerraformtf lambdaLambda

https://github.com/k-nishijima/lambda-handson-jawsug-okinawa-201608

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TerraformAWSIAMDynamoDB API GatewayWeb API GoLambdaAPEX GoAWS

GoLambdaSimple API Gateway

HTTP LambdaAPI GatewayHTTP

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1. Terraform DBIAM 2. Go 3. APEXLambda 4. Simple API GatewayAPI1 5. APIOK? 235

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https://www.terraform.io/intro/getting-started/install.html

infraREADME.mdterraform apply"

DynamoDBIAM Role

Terraform

https://www.terraform.io/intro/getting-started/install.htmlhttps://github.com/k-nishijima/lambda-handson-jawsug-okinawa-201608/tree/master/infra

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Go

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GOPATHLambda

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~/gopath/src/github.com/k-nishijima/lambda-handson

APEXLambda

~/lambda-handson/functions/funcname/

import

APEXimport

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GoLambda

AWS DynamoDB localGoAwsSNS/SQS

https://docs.aws.amazon.com/ja_jp/amazondynamodb/latest/developerguide/DynamoDBLocal.htmlhttps://github.com/p4tin/GoAws

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https://github.com/k-nishijima/lambda-handson-golang-201608/blob/master/dao.go

GoAWSLambda

HTTP

https://github.com/k-nishijima/lambda-handson-golang-201608/blob/master/dao.gohttps://github.com/k-nishijima/lambda-handson-golang-201608/blob/master/dao.go#L17

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JSONvalidate

AWSProfile

svc

https://github.com/k-nishijima/lambda-handson-golang-201608/blob/master/dao.go#L17https://github.com/k-nishijima/lambda-handson-golang-201608/blob/master/dao.go#L44

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go install APEXLambda

go install

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(?)

GoLambda

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APEX

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$ apex -p lambda-handson-201608 init -pAWS profile

Lambda Terraform

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APEX

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functions hello index.js project.json

suffix

Node.jsindex.jshello

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project.json

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project.json

name: prefix

Lambdarole function.json

https://github.com/k-nishijima/lambda-handson-jawsug-okinawa-201608/blob/master/lambda/project.json

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GoLambda

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APEXSTDINSTDOUTNodeGoSTDERR os.Stderr.WriteString(hoge)

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func main() { apex.HandleFunc(func(event json.RawMessage, ctx *apex.Context) (interface{}, error) { // var request lambdaHandson.AddValueRequest if err := json.Unmarshal(event, &request); err != nil { return nil, err }

https://github.com/k-nishijima/lambda-handson-jawsug-okinawa-201608/blob/master/lambda/functions/contact/main.go#L11

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json.UnmarshalJSON

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type AddValueRequest struct { Stage string `json:"stage" valid:"required"` Email string `json:"email" valid:"email,length(1|512),required"` Message string `json:"message" valid:"length(1|1024),required"` }

{ "stage": "dev", "email": "foo@bar.com", "message": "hello golang"}

unmarshal

JSON

JSON

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validategovalidator

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type AddValueRequest struct { Stage string `json:"stage" valid:"required"` Email string `json:"email" valid:"email,length(1|512),required"` Message string `json:"message" valid:"length(1|1024),required"` }

https://github.com/asaskevich/govalidator

https://github.com/asaskevich/govalidator

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err = dao.Put(request) if err != nil { return nil, err }

Lambda

Lambda(^_^;)

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LambdaTIPS

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LambdaIAM RoleAccessKey = Profile

Lambda ProfileOK

https://github.com/k-nishijima/lambda-handson-golang-201608/blob/master/dao.go#L46

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(^^;

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$ apex -p lambda-handson-201608 deploy contact

contact

GUI(^_^;)

APEX

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APEX

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project.jsonname + function

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APEXLambda

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$ apex -p lambda-handson-201608 invoke contact < request_contact.json

JSONcontactinvoke

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DynamoDB

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DynamoDB(^_^;)

GetItemsAPI

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APEX

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$ apex -p lambda-handson-201608 logs contact

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GoGoLambda

S3

@k_nishijima

Web API><

LambdaHTTPS

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@k_nishijima

API Gateway

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@k_nishijima

Web API

HTML

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@k_nishijima

Simple API GatewayAPI

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npm install -g simple-api-gateway

ES6Node4AWS CLIhttps://github.com/horike37/simple-api-gateway

https://github.com/horike37/simple-api-gateway

@k_nishijima

Simple API GatewayAPI

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POST /contact Lambda API

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AWS

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https://github.com/horike37/simple-api-gateway/issues/5

(^_^;)

https://github.com/horike37/simple-api-gateway/issues/5

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west-mbp:lambda-handson-jawsug-okinawa-201608 nishijima$ apigw create ? Please select Region for API Gatway ap-northeast-1 ? Please input API Name Handson API API Create Success!! Please action `apigw edit` and set up API

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west-mbp:lambda-handson-jawsug-okinawa-201608 nishijima$ apigw edit ? Please select Region for API Gatway ap-northeast-1 ? Please select API Handson API

? Do you want to use an existing Resources on Handson APIor create a new one? Create A New Resouce

? Please select parent Resource / ? Please input Resouce Path contact

? Please select method POST ? Please select backend lambda function lambda-handson-jawsug-okinawa-201608_contact

? May I set enable CORS? Yes ? Set up mapping template? (y/N) y ? Please edit mapping template Received

? May I create the API? Yes Create Success!! Resource and Method on Handson API API.

https://github.com/k-nishijima/lambda-handson-jawsug-okinawa-201608/blob/master/apigw/mapping-tamplate.md

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Integration RequestURL//HTTPLambda

URLAPIGWHTTPLambda

http://docs.aws.amazon.com/ja_jp/apigateway/latest/developerguide/api-gateway-mapping-template-reference.htmlhttps://github.com/k-nishijima/lambda-handson-jawsug-okinawa-201608/blob/master/apigw/mapping-tamplate.md

@k_nishijima

API

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west-mbp:lambda-handson-jawsug-okinawa-201608 nishijima$ apigw deploy ? Please select Region for API Gatway ap-northeast-1 ? Please select API Handson API ? Please input Stage Name dev Deploy success! Endpoint:https://.execute-api.ap-northeast-1.amazonaws.com/dev

devAPI = OK URL Lambda

http://execute-api.ap-northeast-1.amazonaws.com/dev

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$ curl -H "Content-Type: application/json" -X POST -d "email=curl@foo.com&message=hello world via curl" https://URL.execute-api.ap-northeast-1.amazonaws.com/dev/contact "ok"

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!?

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Q: A: 1

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Q: A:

DynamoDB