Building Serverless APIs (January 2017)
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Talk @ AWS User Group Rennes, 16/01/2017 : Lambda, serverless frameworks for development & deployment, Lambda@Edge
![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)
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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 [email protected] @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/