https://docs.aws.amazon.com/ja_jp/apigateway/latest/developerguide/http-api-dynamo-db.html
https://cloudaffaire.com/how-to-create-an-api-gateway-with-lambda-integration-using-aws-cli/
-- 1. コマンド等のインストール
-- 1.1 aws cli version 2 インストール
curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install
aws --version
-- 1.2 jqインストール
sudo yum -y install jq
-- 2. DynamoDB テーブルを作成する
aws dynamodb create-table \
--table-name tab1 \
--attribute-definitions \
AttributeName=id,AttributeType=S \
--key-schema \
AttributeName=id,KeyType=HASH \
--billing-mode=PAY_PER_REQUEST
aws dynamodb list-tables
aws dynamodb describe-table --table-name tab1
-- 3. IAMポリシー作成
vim policy01.json
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "Stmt1428341300017",
"Action": [
"dynamodb:DeleteItem",
"dynamodb:GetItem",
"dynamodb:PutItem",
"dynamodb:Query",
"dynamodb:Scan",
"dynamodb:UpdateItem"
],
"Effect": "Allow",
"Resource": "*"
},
{
"Sid": "",
"Resource": "*",
"Action": [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents"
],
"Effect": "Allow"
}
]
}
aws iam create-policy \
--policy-name policy01 \
--policy-document file://policy01.json
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": "lambda.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}
aws iam create-role \
--role-name role01 \
--assume-role-policy-document file://role01.json
-- 5. ポリシーをロールにアタッチ
aws iam attach-role-policy \
--policy-arn arn:aws:iam::999999999999:policy/policy01 \
--role-name role01
-- 6. Lambda関数作成
vim test.js
const AWS = require("aws-sdk");
const dynamo = new AWS.DynamoDB.DocumentClient();
exports.handler = async (event, context) => {
let body;
let statusCode = 200;
const headers = {
"Content-Type": "application/json"
};
try {
switch (event.routeKey) {
case "DELETE /items/{id}":
await dynamo
.delete({
TableName: "tab1",
Key: {
id: event.pathParameters.id
}
})
.promise();
body = `Deleted item ${event.pathParameters.id}`;
break;
case "GET /items/{id}":
body = await dynamo
.get({
TableName: "tab1",
Key: {
id: event.pathParameters.id
}
})
.promise();
break;
case "GET /items":
body = await dynamo.scan({ TableName: "tab1" }).promise();
break;
case "PUT /items":
let requestJSON = JSON.parse(event.body);
await dynamo
.put({
TableName: "tab1",
Item: {
id: requestJSON.id,
name: requestJSON.name,
price: requestJSON.price
}
})
.promise();
body = `Put item ${requestJSON.id}`;
break;
default:
throw new Error(`Unsupported route: "${event.routeKey}"`);
}
} catch (err) {
statusCode = 400;
body = err.message;
} finally {
body = JSON.stringify(body);
}
return {
statusCode,
body,
headers
};
};
chmod 755 test.js
zip test.zip test.js
aws lambda create-function \
--function-name func01 \
--zip-file fileb://test.zip \
--handler test.handler \
--runtime nodejs14.x \
--role arn:aws:iam::999999999999:role/role01
aws lambda list-functions | grep func01
aws lambda get-function --function-name func01
-- 7. HTTP API を作成する
aws apigatewayv2 create-api \
--name api01 \
--protocol-type HTTP \
--target arn:aws:lambda:ap-northeast-1:999999999999:function:func01
aws apigatewayv2 get-apis
aws apigatewayv2 get-apis| jq -r .Items.ApiId
aws apigatewayv2 get-api \
--api-id 1111111111
-- 8. ルートを作成する
aws apigatewayv2 get-integrations \
--api-id 1111111111
aws apigatewayv2 get-integrations \
--api-id 1111111111| jq -r .Items.IntegrationId
aws apigatewayv2 create-route \
--api-id 1111111111 \
--route-key 'GET /items/{id}' \
--target integrations/2222222
aws apigatewayv2 create-route \
--api-id 1111111111 \
--route-key 'GET /items' \
--target integrations/2222222
aws apigatewayv2 create-route \
--api-id 1111111111 \
--route-key 'PUT /items' \
--target integrations/2222222
aws apigatewayv2 create-route \
--api-id 1111111111 \
--route-key 'DELETE /items/{id}' \
--target integrations/2222222
aws apigatewayv2 get-routes \
--api-id 1111111111
-- 9. Lambda関数に権限を追加する
aws lambda add-permission \
--function-name func01 \
--statement-id apigw \
--action lambda:InvokeFunction \
--principal apigateway.amazonaws.com \
--source-arn "arn:aws:execute-api:ap-northeast-1:999999999999:1111111111/*"
aws lambda get-policy \
--function-name func01 | jq -r .Policy | jq .
-- 10. API をテストする
curl -v -X "PUT" -H "Content-Type: application/json" \
-d "{\"id\": \"001\", \"name\": \"item01\", \"price\": 100}" \
https://1111111111.execute-api.ap-northeast-1.amazonaws.com/items
curl -v -X "PUT" -H "Content-Type: application/json" \
-d "{\"id\": \"002\", \"name\": \"item02\", \"price\": 200}" \
https://1111111111.execute-api.ap-northeast-1.amazonaws.com/items
aws dynamodb scan --table-name tab1
curl -v https://1111111111.execute-api.ap-northeast-1.amazonaws.com/items
curl -v https://1111111111.execute-api.ap-northeast-1.amazonaws.com/items/001
curl -v -X "DELETE" https://1111111111.execute-api.ap-northeast-1.amazonaws.com/items/001
aws dynamodb scan --table-name tab1
-- 11. クリーンアップ
-- HTTP APIの削除
aws apigatewayv2 get-apis
aws apigatewayv2 delete-api \
--api-id 1111111111
-- Lambda関数の削除
aws lambda get-function --function-name func01
aws lambda delete-function --function-name func01
-- IAMロールの削除
aws iam list-roles | grep role01
aws iam detach-role-policy \
--role-name role01 \
--policy-arn arn:aws:iam::999999999999:policy/policy01
aws iam delete-role --role-name role01
-- IAMポリシーの削除
aws iam list-policies | grep policy01
aws iam delete-policy \
--policy-arn arn:aws:iam::999999999999:policy/policy01
-- DynamoDB テーブル削除
aws dynamodb list-tables
aws dynamodb delete-table --table-name tab1
