Building Serverless APIs (January 2017)
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The document discusses the AWS Lambda service and various serverless frameworks for building APIs and applications, highlighting their features and use cases. It introduces tools like the Serverless Framework, Gordon, and AWS Chalice, which simplify the deployment and management of serverless applications across multiple programming languages. Additionally, it covers development workflows, the AWS Serverless Application Model (SAM), and the Lambda@Edge feature for running code at AWS edge locations.
![Serverless: “Hello World” API
$ serverless create
Edit handler.js, serverless.yml and event.json
$ serverless deploy [--stage stage_name]
$ serverless invoke [--local] --function function_name
$ serverless info
$ http $URL](https://image.slidesharecdn.com/20170116ugrennes-170117055753/85/Building-Serverless-APIs-January-2017-9-320.jpg)
![Gordon: “Hello World” API
$ gordon startproject helloworld
$ gordon startapp helloapp
Write hellofunc() function
$ gordon build
$ echo '{"name":"Julien"}' | gordon run helloapp.hellofunc
$ gordon apply [--stage stage_name]
$ http post $URL name=Julien](https://image.slidesharecdn.com/20170116ugrennes-170117055753/85/Building-Serverless-APIs-January-2017-11-320.jpg)
![AWS Chalice: “Hello World” API
$ chalice new-project helloworld
Write your function in app.py
$ chalice local
$ chalice deploy
$ export URL=`chalice url`
$ http $URL
$ http put $URL/hello/julien
$ chalice logs [ --include-lambda-messages ]](https://image.slidesharecdn.com/20170116ugrennes-170117055753/85/Building-Serverless-APIs-January-2017-13-320.jpg)
![AWS Chalice: PUT/GET in S3 bucket
$ chalice new-project s3test
Write your function in app.py
$ chalice local
$ http put http://localhost:8000/objects/doc.json value1=5 value2=8
$ http get http://localhost:8000/objects/doc.json
$ chalice deploy [stage_name]
$ export URL=`chalice url`
$ http put $URL/objects/doc.json value1=5 value2=8
$ http get $URL/objects/doc.json](https://image.slidesharecdn.com/20170116ugrennes-170117055753/85/Building-Serverless-APIs-January-2017-14-320.jpg)
Building Serverless APIs (January 2017)
- 1. ©2015, Amazon Web Services, Inc. or its affiliates. All rights reserved Building serverless APIs Julien Simon, Principal Technical Evangelist, AWS julsimon@amazon.fr @julsimon
- 2. Serverless architecture" =" Managed services " +" AWS Lambda" " Reference architectures: http://www.allthingsdistributed.com/2016/06/aws-lambda-serverless-reference-architectures.html
- 3. AWS Lambda • Announced at re:Invent 2014 • Deploy pure functions in Java, Python, Node.js and C# • Just code, without the infrastructure drama • Built-in scalability and high availability • Integrated with many AWS services • Pay as you go • Combination of execution time (100ms slots) & memory used • Starts at $0.000000208 per 100ms • Free tier available: first 1 million requests per month are free http://aws.amazon.com/lambda AWS re:Invent 2014 | (MBL202) NEW LAUNCH: Getting Started with AWS Lambda https://www.youtube.com/watch?v=UFj27laTWQA
- 4. What can you do with AWS Lambda? • Grow ‘connective tissue’ in your AWS infrastructure – Example: http://www.slideshare.net/JulienSIMON5/building-a-serverless-pipeline • Build event-driven applications • Build APIs together with Amazon API Gateway • RESTful APIs • Resources, methods • Stages http://aws.amazon.com/apigateway
- 5. https://read.acloud.guru/serverless-the-future-of-software-architecture-d4473ffed864 A Cloud Guru: 100% Serverless
- 6. Typical development workflow 1. Write and deploy a Lambda function 2. Create and deploy a REST API with API Gateway 3. Connect the API to the Lambda function 4. Invoke the API 5. Test, debug and repeat ;)
- 7. " Simplifying Development " "Code samples available at https://github.com/juliensimon/aws/tree/master/lambda_frameworks " "
- 8. The Serverless framework " formerly known as JAWS: Just AWS Without Servers • Announced at re:Invent 2015 by Austen Collins and Ryan Pendergast • Supports Node.js, as well as Python and Java (with restrictions) • Auto-deploys and runs Lambda functions, locally or remotely • Auto-deploys your Lambda event sources: API Gateway, S3, DynamoDB, etc. • Creates all required infrastructure with CloudFormation • Simple configuration in YML http://github.com/serverless/serverless https://serverless.com AWS re:Invent 2015 | (DVO209) https://www.youtube.com/watch?v=D_U6luQ6I90 & https://vimeo.com/141132756
- 9. Serverless: “Hello World” API $ serverless create Edit handler.js, serverless.yml and event.json $ serverless deploy [--stage stage_name] $ serverless invoke [--local] --function function_name $ serverless info $ http $URL
- 10. Gordon • Released in Oct’15 by Jorge Batista • Supports Python, Javascript, Golang, Java, Scala, Kotlin (including in the same project) • Auto-deploys and runs Lambda functions, locally or remotely • Auto-deploys your Lambda event sources: API Gateway, CloudWatch Events, DynamoDB Streams, Kinesis Streams, S3 • Creates all required infrastructure with CloudFormation • Simple configuration in YML https://github.com/jorgebastida/gordon https://news.ycombinator.com/item?id=11821295
- 11. Gordon: “Hello World” API $ gordon startproject helloworld $ gordon startapp helloapp Write hellofunc() function $ gordon build $ echo '{"name":"Julien"}' | gordon run helloapp.hellofunc $ gordon apply [--stage stage_name] $ http post $URL name=Julien
- 12. AWS Chalice " Think of it as a serverless framework for Flask apps" • Released in Jul’16, still in beta • Just add your Python code – Deploy with a single call and zero config – The API is created automatically, the IAM policy is auto-generated • Run APIs locally on port 8000 (similar to Flask) • Fast & lightweight framework – 100% boto3 calls (AWS SDK for Python) à fast – No integration with CloudFormation à no creation of event sources https://github.com/awslabs/chalice https://aws.amazon.com/blogs/developer/preview-the-python-serverless-microframework-for-aws/
- 13. AWS Chalice: “Hello World” API $ chalice new-project helloworld Write your function in app.py $ chalice local $ chalice deploy $ export URL=`chalice url` $ http $URL $ http put $URL/hello/julien $ chalice logs [ --include-lambda-messages ]
- 14. AWS Chalice: PUT/GET in S3 bucket $ chalice new-project s3test Write your function in app.py $ chalice local $ http put http://localhost:8000/objects/doc.json value1=5 value2=8 $ http get http://localhost:8000/objects/doc.json $ chalice deploy [stage_name] $ export URL=`chalice url` $ http put $URL/objects/doc.json value1=5 value2=8 $ http get $URL/objects/doc.json
- 15. Summing things up Serverless The most popular serverless framework Built with and for Node.js. Python and Java: YMMV Rich features, many event sources Not a web framework Gordon Great challenger! Node.js, Python, Java, Scala, Golang Comparable to Serverless feature-wise Not a web framework Chalice AWS project, in beta Python only Does only one thing, but does it great Dead simple, zero config Flask web framework
- 16. More Lambda frameworks • Kappa https://github.com/garnaat/kappa – Released Dec’14 by Mitch Garnaat, author of boto and the AWS CLI (still maintained?) – Python only, multiple event sources • Apex https://github.com/apex/apex – Released in Dec’15 by TJ Holowaychuk – Python, Javascript, Java, Golang – Terraform integration to manage infrastructure for event sources • Zappa https://github.com/Miserlou/Zappa – Released in Feb’16 by Rich Jones – Python web applications on AWS Lambda + API Gateway • Docker-lambda https://github.com/lambci/docker-lambda – Released in May’16 by Michael Hart – Run functions in Docker images that “replicate” the live Lambda environment
- 17. 2 Java tools for AWS Lambda https://java.awsblog.com/post/TxWZES6J1RSQ2Z/Testing-Lambda-functions-using-the-AWS-Toolkit-for-Eclipse https://aws.amazon.com/blogs/developer/aws-toolkit-for-eclipse-serverless-application https://github.com/awslabs/aws-serverless-java-container Eclipse plug-in • Code, test and deploy Lambdas from Eclipse • Run your functions locally and remotely • Test with local events and Junit4 • Deploy standalone functions, or with the " AWS Serverless Application Model (Dec’16) Serverless Java Container • Run Java RESTful APIs as-is • Default implementation of the Java servlet HttpServletRequest " HttpServletResponse • Support for Java frameworks such as Jersey or Spark
- 19. AWS Serverless Application Model (SAM)" • CloudFormation extension released in Nov’16 to bundle Lambda functions, APIs & events • 3 new CloudFormation resource types – AWS::Serverless::Function – AWS::Serverless::Api – AWS::Serverless::SimpleTable (DynamoDB) • 2 new CloudFormation CLI commands – ‘aws cloudformation package’ – ‘aws cloudformation deploy’ • Integration with CodeBuild and CodePipeline for CI/CD • Expect SAM to be integrated in most / all frameworks https://aws.amazon.com/fr/blogs/compute/introducing-simplified-serverless-application-deplyoment-and-management https://github.com/awslabs/serverless-application-model/
- 20. AWSTemplateFormatVersion: '2010-09-09' Transform: AWS::Serverless-2016-10-31 Description: Get items from a DynamoDB table. Resources: GetFunction: Type: AWS::Serverless::Function Properties: Handler: index.get Runtime: nodejs4.3 Policies: AmazonDynamoDBReadOnlyAccess Environment: Variables: TABLE_NAME: !Ref Table Events: GetResource: Type: Api Properties: Path: /resource/{resourceId} Method: get Table: Type: AWS::Serverless::SimpleTable Sample SAM template for: • Lambda function • HTTP GET API • DynamoDB table
- 22. The AWS edge North America South America EMEA APAC POPs Cities Countries Continents Regional Edge Caches
- 23. Lambda@Edge • Lambda@Edge is an extension of AWS Lambda that allows you to run Node.js code at AWS global edge locations. • Bring your own code to the edge and customize your content very close to your users, improving the end-user experience. • Typical use cases • Customize content, based on user/device properties • Validate visitors: check tokens, filter bot traffic • Rewrite URLs: inject ads, hide file structure • Run A/B testing
- 24. CloudFront Triggers for " Lambda@Edge Functions
- 25. Lambda@Edge Service Limits Items Lambda@Edge Lambda Timeout 50 ms 300 seconds Function “Power Level” 128 MB 128 MB – 1.5 GB Function Deployment Package Size 1MB 50MB • Runtime: Node.js 4.3 • Triggered by CloudFront events • Access: No network connections, AWS region access, disk access or Amazon VPC
- 26. Lambda@Edge demo: the Metal A/B test m/ • Static website in S3, distributed to CloudFront http://d2eb9d90qk3238.cloudfront.net • The index page references an image file that doesn’t exist in the S3 bucket <img src="http://d2eb9d90qk3238.cloudfront.net/album.jpg"> • A Lambda function is triggered on the “Origin request” event and replaces album.jpg with a random file
- 28. New Lambda videos from re:Invent 2016 AWS re:Invent 2016: What’s New with AWS Lambda (SVR202) https://www.youtube.com/watch?v=CwxWhyGteNc AWS re:Invent 2016: Serverless Apps with AWS Step Functions (SVR201) https://www.youtube.com/watch?v=75MRve4nv8s AWS re:Invent 2016: Real-time Data Processing Using AWS Lambda (SVR301) https://www.youtube.com/watch?v=VFLKOy4GKXQ AWS re:Invent 2016: Serverless Architectural Patterns and Best Practices (ARC402) https://www.youtube.com/watch?v=b7UMoc1iUYw AWS re:Invent 2016: Bringing AWS Lambda to the Edge (CTD206) https://www.youtube.com/watch?v=j26novaqF6M AWS re:Invent 2016: Ubiquitous Computing with Greengrass (IOT201) https://www.youtube.com/watch?v=XQQjX8GTEko
- 29. The only Lambda book you need to read Written by AWS Technical Evangelist Danilo Poccia Released in December 2016 https://www.amazon.com/Aws-Lambda-Action- Event-driven-Applications/dp/1617293717/