AWS

[AWS] SAM 간단한 예제(RESTful API endpoint using Amazon API Gateway)

SAM으로 간단한 예제

1. template.yaml 설정

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AWSTemplateFormatVersion: '2010-09-09'   #SAM 템플릿
Transform: 'AWS::Serverless-2016-10-31'
Description: A simple backend with a RESTful API endpoint using Amazon API Gateway.
Resources:
  hello:
    Type: 'AWS::Serverless::Function'
    Properties:
      Handler: handler.hello    #실행 함수
      Runtime: nodejs8.10       #node.js 로 실행
      CodeUri: .                #파일 path
      Description: A simple backend with a RESTful API endpoint using Amazon API Gateway.
      MemorySize: 512           #function 할당 메모리
      Timeout: 10               #호출 타임아웃
      Events:
        Api1:
          Type: Api             #api gateway
          Properties:
            Path: /hello        #API호출경로
            Method: ANY         #모든메소드

2. handler.js

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'use strict';

// apigateway 에서 호출시 진입점(hello)
exports.hello = (event, context, callback) => {
    //console.log('Received event:', JSON.stringify(event, null, 2));

    switch (event.httpMethod) {
        case 'DELETE':
            sendResponse(200, 'DELETE happened', callback);
            break;
        case 'GET':
            sendResponse(200, 'GET happened', callback);
            break;
        case 'POST':
            sendResponse(200, 'POST happened', callback);
            break;
        case 'PUT':
            sendResponse(200, 'PUT happened', callback);
            break;
        default:
            sendResponse(200, `Unsupported method "${event.httpMethod}"`, callback);
    }
};

function sendResponse(statusCode, message, callback){
    const response = {
        statusCode: statusCode,
        body: JSON.stringify(message)
    };
    callback(null,response);
}

3. S3 bucket 생성
aws 설치 및 config 설정 생략…

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aws s3 mb s3://sam-test-bucket3
make_bucket: sam-test-bucket3

4. Packing Artifacts

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aws cloudformation package --template-file .\template.yml --s3-bucket sam-test-bucket3 --output-template.yaml
Uploading to 7e7043603cb391e49a966292b19ddcf0  42386 / 42386.0  (100.00%)
Successfully packaged artifacts and wrote output template to file packaged-template.yaml.
Execute the following command to deploy the packaged template

output-template.yaml 에 codeUri가 변경됨 S3의 위치로

5. 배포(Deploy)

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aws cloudformation deploy --template-file .\packaged-template.yaml --stack-name sam-test-basic3 --capabilities CAPABILITY_IAM

Waiting for changeset to be created..
Waiting for stack create/update to complete
Successfully created/updated stack - sam-test-basic3

6. 생성된 cloudFormation STACK
-

7. 생성된 STACK RESOURCE
-

8. 생성된 Template
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9. 생성된 API GATEWAY
-

10. API 호출정보 및 호출
-

호출

11. 삭제

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aws --region us-east-2 cloudformation delete-stack --stack-name sam-test-basic3