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We have to install “bootstrap stack” per each environment
[Account + Region] to support CDK](https://image.slidesharecdn.com/lambdaless-public-191109051757/85/Lambdaless-and-AWS-CDK-123-320.jpg)
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Lambdaless and AWS CDK
- Lambdaless refers to a serverless architecture that does not use AWS Lambda functions. It utilizes AWS API Gateway to directly call other AWS services. - Some examples of how Lambdaless can be used include building a URL shortener service using S3 redirects and access logs or building a basic CRUD API that stores data in DynamoDB. - Lambdaless is best suited for simple tasks that involve calling a single AWS service API, while more complex business logic requiring data joins or computation should use Lambda functions.
Lambdaless and AWS CDK
- 1. Lambdaless, and AWS CDK MooYeolPrescott Lee Software Engineer @ Vingle, Inc.
- 2. • Serverless Lover • Loves building all kinds of multimedia services • Software Engineer @ Vingle • https://github.com/mooyoul • https://mooyoul.github.io Who am i?
- 3. Topics • Lambdaless • What’sLambdaless? When to use? How? • Real-world Examples • AWS CDK • What's AWS CDK, How to use that? • Unlocking new possibilities
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- 9. Recap How Lambdacan be called via HTTP endpoint
- 10. How Lambda invokedvia HTTP AWS Lambda Amazon S3 Role Internet Amazon API Gateway Role Users GET https://api-id.execute-api.amazonaws.com/stage/path
- 11. How Lambda invokedvia HTTP AWS Lambda Amazon S3 Role Internet Amazon API Gateway Role Users Call AWS Service API
- 12. How Lambda invokedvia HTTP AWS Lambda Amazon S3 Role Internet Amazon API Gateway Role Users Call AWS Service API
- 13. How Lambda invokedvia HTTP AWS Lambda Amazon S3 Role Internet Amazon API Gateway Role Users Call AWS Service API
- 14. How Lambda invokedvia HTTP AWS Lambda Amazon S3 Role Internet Amazon API Gateway Role Users Get file contents by calling GetObject
- 15. How Lambda invokedvia HTTP AWS Lambda Amazon S3 Role Internet Amazon API Gateway Role Users Get file contents by calling GetObject
- 16. How Lambda invokedvia HTTP AWS Lambda Amazon S3 Role Internet Amazon API Gateway Role Users Get file contents by calling GetObject
- 17. How Lambda invokedvia HTTP AWS Lambda Amazon S3 Role Internet Amazon API Gateway Role Users Let’s focus this part
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- 20. API Gateway can call AWSService APIs
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- 24. If you needto build an URL shortener service, What will you do?
- 25. URL Shortener requirements •Create Shorten ID and Store original URL • Redirect to original URL if exists • Collect visitor statistics
- 26. URL Shortener requirements •Create Shorten ID and Store original URL • Redirect to original URL if exists • Collect visitor statistics https://docs.aws.amazon.com/AmazonS3/latest/dev/how-to-page-redirect.html
- 27. URL Shortener requirements •Create Shorten ID and Store original URL • Redirect to original URL if exists • Collect visitor statistics S3 built-in feature
- 28. URL Shortener requirements •Create Shorten ID and Store original URL • Redirect to original URL if exists • Collect visitor statistics Turn on Access Log & Run ETL through Athena
- 29. Users Amazon API Gateway AmazonCloudfront Amazon S3 AWS Lambda Lookup shorten id and redirect Store original URL with shorten id Store access logs
- 31. Lambda just do simpletasks ☎
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- 33. Users Amazon API Gateway AmazonCloudfront Amazon S3 AWS Lambda Lookup shorten id and redirect Store original URL with shorten id Store access logs
- 34. Users Amazon API Gateway AmazonCloudfront Amazon S3 Lookup shorten id and redirect Store access logs Store original URL with shorten id
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- 36. Set destination w/ pathparameter
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- 39. Assign Random ID by referencing Request ID
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- 42. Set object contentwith additional data
- 43. Create shorten urlof https://www.vingle.net/mooyoul
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- 55. Bring API Gatewayas First Class
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- 58. At Vingle, We havemultiple Media formats
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- 63. Embedded Video Youtube Vimeo Naver TVTwitch Clip Twitch VideoV LIVE
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- 67. We access webpages fromVirginia Region
- 68. Embedded Video Youtube Vimeo Naver TVTwitch Clip Twitch VideoV LIVE
- 69. We had issueswith some websites 😭
- 70. Access denied dueto Firewall Policy (They blocked some N. Virginia CIDRs) (Actually we got 403 Forbidden)
- 71. Timeouts due to poorinternet connectivity
- 72. We should buildProxy 🛠
- 73. It’s easy aspie 🥧
- 74. Users Amazon API GatewayAmazonCloudfront AWS Lambda 3rd Party Website
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- 78. Hidden parts • Dependencymanagement • If axios is updated, We need to update axios dependency and deploy function • Runtime management • If Node.js runtime reaches EOL, We need to update lambda runtime and deploy function • Monitoring • We need to monitor Lambda metrics • Wasting Money • Most of execution time: Just waiting for response • Performance overhead & Size limitations
- 79. I don’t wantto manage Lambda either 😫
- 80. Use API Gateway asProxy 🛤
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- 83. Users Amazon API GatewayAmazonCloudfront AWS Lambda 3rd Party Website
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- 92. Users Amazon API GatewayAmazonCloudfront AWS Lambda Amazon Dynamo DB Amazon RDS
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- 99. Users Amazon API GatewayAmazonCloudfront AWS Lambda Amazon Dynamo DB Amazon RDS
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- 101. RDS can besupported 👀
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- 104. More use cases •Expose Kinesis Firehose endpoint to collect data • Collect external incoming webhook payload (e.g. SendGrid Events, Slack Outgoing Webhook) • Expose Amazon IoT Data endpoint to publish events • Public Real-time messaging • Public Event Pub/Sub Channel • Expose Step Functions Execution endpoint • Any else AWS API can be invoked via API Gateway • e.g. SNS, SQS, AppSync
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- 106. Anything else? • SecuringAPI Gateway • API Key • Cognito Integration • Parameter Validation • Supports OpenAPI Schema to validate payload • Parameter Mapping • Context Parameters
- 107. Bonus: Lambdaless Scheduled Task •Setup Cron Rule from CloudWatch Events • Publish Cron Trigger Event to SNS topic • Subscribe SNS topic and Notify Event to HTTP Endpoint (Webhook) • Use Webhook Endpoint as API Gateway • It’s possible in theory, but not recommended!
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- 109. When to useLambdaless • Super simple Task • Proxy • Mock API • Call single AWS Service API
- 110. When NOT touse Lambdaless • Anything else of “When to use Lambdaless” • Require complex business logic • Require data join • Require computation • Require non-interactive event triggers (e.g. DynamoDB Callback)
- 111. Recap: Lambdaless • What’sLambdaless? • Serverless Architecture without Lambda • Use API Gateway as first class • When to use Lambdaless? • Super simple task only • Use-cases • URL Shortener Service, Basic CRUD API (DynamoDB), Proxy
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- 119. CDK Key Features •Define AWS Resources in modern programming language, not YAML • TypeScript, Python • Reusable Template, Abstract the details • Easy to reference pre-existing AWS Resources
- 120. CDK Key Features •Built-in CLI provides seamless development experience • Easy Deploy & Packaging • Build Docker Image & Publish to ECR • Package lambda code • Extended AWS Resource support • Issue a ACM Certificate using DNS Validation
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- 123. Bootstrap AWS Environment Wehave to install “bootstrap stack” per each environment [Account + Region] to support CDK
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- 126. Let’s build Lambda Applicationwith CDK
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- 129. Edit Stack Define LambdaFunction
- 130. Edit Stack Define APIGateway API
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- 137. Users Amazon API GatewayAmazonCloudfront AWS Lambda 3rd Party Website
- 138. Make Proxy Serviceto Logical Resource
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- 150. Expand Application code toprovision resources
- 153. See also • https://github.com/aws-samples/aws-cdk- examples •https://cdkworkshop.com/
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