今日話すこと

  • AWS CDK とは？
  • AWS CDK の書き方
  • サンプル

はじめます

AWS CDK とは？

TL;DR

TS を書くと AWS 環境が出来上がる

何言ってる分からｎ

見てみよう

AWS CDK の書き方

最小ファイル構成

package.json

{
  "name": "cdk-sample",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "scripts": {
    "cdk": "cdk",
    "synth": "cdk synth",
    "deploy": "cdk deploy"
  },
  "devDependencies": {
    "@types/node": "^10.9.4",
    "aws-cdk": "^0.30.0",
    "ts-node": "^8.1.0",
    "typescript": "^3.2.4"
  },
  "dependencies": {
    "@aws-cdk/aws-s3": "*",
    "@aws-cdk/cdk": "*"
  }
}

cdk.json

{ "app": "ts-node index.ts" }

index.ts

import cdk = require("@aws-cdk/cdk");
import s3 = require("@aws-cdk/aws-s3");
class MyStack extends cdk.Stack {
  constructor(parent: cdk.App, name: string) {
    super(parent, name);
    new s3.Bucket(this, "MyBucket", {
      bucketName: "bucket-tte-baketsu-no-koto-nandane"
    });
  }
}
const app = new cdk.App();
new MyStack(app, "CdkAample");

cdk synth

cdk deploy

s3 bucket できた

やったね！

TS で書ける CFn(Cloud Formation) て感じ

CFn は(あの使いにくい)AWS コンソールをそのままいじっている感じ

CDK はより直感的

TS の型に導かれる

インフラ構成の変更をコードレビューできるよ！

注意 !!!

サンプル

Static Site

import cdk = require('@aws-cdk/cdk')
import cloudfront = require('@aws-cdk/aws-cloudfront')
import s3 = require('@aws-cdk/aws-s3')
import s3deploy = require('@aws-cdk/aws-s3-deployment')
class MyStack extends cdk.Stack {
  constructor(parent: cdk.App, name: string) {
    super(parent, name)
    const siteBucket = new s3.Bucket(this, 'MyBucket', {
      bucketName: 'bucket-tte-baketsu-no-koto-nandane',
      websiteIndexDocument: 'index.html',
      publicReadAccess: true,
    })
    new s3deploy.BucketDeployment(this, 'MySiteDeployment', {
      source: s3deploy.Source.asset('./dist'),
      destinationBucket: siteBucket,
    })
    const distribution = new cloudfront.CloudFrontWebDistribution(
      this,
      'MyWebDistribution',
      {
        originConfigs: [
          {
            s3OriginSource: { s3BucketSource: siteBucket },
            behaviors: [{ isDefaultBehavior: true }],
          },
        ],
      },
    )
    new cdk.CfnOutput(this, 'DistributionId', {
      value: distribution.distributionId,
    })
    new cdk.CfnOutput(this, 'DomainName', {
      value: distribution.domainName,
    })
  }
}
const app = new cdk.App()
new MyStack(app, 'CdkAample')

Lambda Rest Api

import cdk = require('@aws-cdk/cdk')
import lambda = require('@aws-cdk/aws-lambda')
import apigateway = require('@aws-cdk/aws-apigateway')
class MyStack extends cdk.Stack {
  constructor(parent: cdk.App, name: string) {
    super(parent, name)
    const lambdaFn = new lambda.Function(this, 'MyLambda', {
      code: new lambda.AssetCode('./functions'),
      handler: 'hoge.handler',
      runtime: lambda.Runtime.NodeJS810,
    })
    const restApi = new apigateway.LambdaRestApi(this, 'MyRestApi', {
      handler: lambdaFn,
    })
    new cdk.CfnOutput(this, 'functionName', {
      value: lambdaFn.functionName,
    })
    new cdk.CfnOutput(this, 'restApiUrl', {
      value: restApi.url,
    })
  }
}
const app = new cdk.App()
new MyStack(app, 'CdkLambdaSample')

hoge.js

module.exports.handler = async (event, context) => {
  const now = new Date().toISOString()
  console.info(`now is ${now} !!!`)
  return {
    isBase64Encoded: false,
    statusCode: 200,
    headers: {},
    body: JSON.stringify({ now }),
  }
}

まとめ

AWS CDK はいいぞ！！

(プロダクトでのご利用は計画的に)

Cloud Formation もいいぞ！！

(プロダクトでガンガン使える)

  • CureApp
  • アプリで医療機器を作ってる
  • AWS, TS, react, RN, Node.js, MongoDB

おわり。

ご清聴ありがとうございました！！