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Serverless Framework (2018)
- 1. An introduction to AWS Lambda and the Serverless Framework © Rowell Belen 1
- 2. About Me Rowell Belen / Senior Platform Engineer @ Algorithmia » LinkedIn: https://linkedin.com/in/rowellbelen » Blog: https://www.rowellbelen.com » GitHub: https://github.com/bytekast » Twitter: @bytekast » Email: rowell.belen@bytekast.com © Rowell Belen 2
- 3. What is Serverless Computing? Serverless Computing is a cloud computing model that allows you to build and run applications and services without thinking about servers. The platform takes care of everything required to run and scale your code with high availability. © Rowell Belen 3
- 4. The Sweet Spot © Rowell Belen 4
- 5. But... but... aren't PaaS and Serverless the same? © Rowell Belen 5
- 6. What is the key difference between PaaS and Serverless? © Rowell Belen 6
- 9. Unit of Scale » Data Center: Hardware (Physical Hosting Env Abstraction) » IaaS: Virtual Machines (Hardware Abstraction) » Paas: Application (VM Abstraction) » Serverless: Function (Runtime Abstraction) © Rowell Belen 9
- 10. Wait.. wait... What about containers? © Rowell Belen 10
- 11. What are the key differences between Containers and Serverless? © Rowell Belen 11
- 14. What is AWS Lambda? Amazon's Serverless compute platform for stateless code execution in response to events © Rowell Belen 14
- 15. Other Serverless Platform Providers » Microsoft Azure Functions » Iron.io » Google Cloud Functions » IBM Open Whisk » WebTask.io » PubNub BLOCKS © Rowell Belen 15
- 16. How Is AWS Lambda Used? » Stream Data Processing » REST Backend Services » One-off Processes » Background Workers » Event Responders © Rowell Belen 16
- 17. How are Lambda Functions Triggered? » Event-driven (SNS, SQS, S3, API-Gateway, Amazon Echo Skills, IoT, etc.) » Direct Invocation (CLI, SDK, etc.) » Scheduled Interval © Rowell Belen 17
- 18. Supported Languages » Node.js (Javascript) » Python » JVM ( Java, Scala, Groovy, Kotlin, Clojure, etc. ) » C# » GoLang © Rowell Belen 18
- 19. Pricing Memory (MB) Free tier seconds per month Price per 100ms ($) 128 3,200,000 0.000000208 256 1,600,000 0.000000417 512 800,000 0.000000834 1024 400,000 0.000001667 1536 266,667 0.000002501 © Rowell Belen 19
- 20. Top Tier Pricing (1536 MB Memory) 1 Million Executions @ 1 sec/exec ≈ $18.34 © Rowell Belen 20
- 21. Benefits » Cost and Utilization » Fully Managed Infrastructure » Rapid Development » Streamlined AWS Integrations » Pay Per Use » Auto Scale » Built-in Versioning © Rowell Belen 21
- 22. Drawbacks » Limited Language Support » Not Suitable for Long-running Tasks » Local Development and Debugging Challenges » Limited Infrastructure Transparency / Less Control » Potential Vendor Lock-in » Cutting-edge quirks » Concurrent Execution Limit is Shared across entire AWS © Rowell Belen 22
- 23. Enough chit-chat, let's see some code! © Rowell Belen 23
- 24. Sample Function def sendImage(Map httpEvent, Context context) { try { final request = new RequestContext().input(httpEvent).context(context) final imageUrl = request.httpBody() SqsUtil.instance.sendSQSMessage(inputQueueUrl, imageUrl) new Response().statusCode(200).body("QUEUED: ${imageUrl}") } catch (e) { new Response().statusCode(500).body(e.message) } } © Rowell Belen 24
- 25. What is the Serverless Framework? Development toolkit for building, managing and deploying Serverless applications and resources © Rowell Belen 25
- 26. Serverless Framework CLI npm install serverless -g mkdir my-api && cd my-api serverless create --template aws-groovy-gradle serverless deploy --stage dev serverless invoke --function my-function --log © Rowell Belen 26
- 27. Available Templates » aws-nodejs » aws-python » aws-groovy-gradle » aws-java-maven » aws-scala-sbt » ...etc © Rowell Belen 27
- 28. serverless.yml - Basic Function service: serverless-demo provider: runtime: java8 timeout: 300 memorySize: 1536 package: artifact: /build/dist/serverless-demo.zip functions: my-function: handler: com.bytekast.serverless.MyLambdaFunction::handler © Rowell Belen 28
- 29. serverless.yml - API Gateway functions: createUser: handler: com.bytekast.serverless.UserService::createUser events: - http: path: users/create method: post deleteUser: handler: com.bytekast.serverless.UserService::deleteUser events: - http: path: users/delete method: delete © Rowell Belen 29
- 30. serverless.yml - API Gateway (Custom Authorization) ... events: - http: path: users/create method: post cors: true authorizer: arn: arn:aws:lambda:us-east-1:1234567890123:function:authorizer identitySource: method.request.header.Authorization identityValidationExpression: Bearer .* © Rowell Belen 30
- 31. serverless.yml - SNS Topic Subscription functions: audit: handler: com.bytekast.serverless.AuditService::audit events: - sns: dev-audit-topic © Rowell Belen 31
- 32. serverless.yml - Scheduled Trigger functions: crawl: handler: com.bytekast.serverless.SearchService::crawl events: - schedule: rate(2 hours) - schedule: cron(0 12 * * ? *) © Rowell Belen 32
- 33. serverless.yml - IAM Role Permissions provider: ... iamRoleStatements: - Effect: "Allow" Action: - "sqs:*" Resource: arn:aws:sqs:us-east-1:1234567890123:dev-serverless-demo © Rowell Belen 33
- 34. serverless.yml - Create AWS Resources resources: Resources: InboundQueue: Type: "AWS::SQS::Queue" Properties: QueueName: ${self:provider.stage}-serverless-demo MessageRetentionPeriod: 1209600 VisibilityTimeout: 60 © Rowell Belen 34
- 35. Sample Serverless ETL Pattern © Rowell Belen 35
- 36. Sample Serverless Platform Architecture © Rowell Belen 36
- 37. DEMO Build Car Image Recognition Service using Serverless Framework + API Gateway + AWS Lambda Sample Project © Rowell Belen 37
- 38. What about Cloud Scale DevOps? © Rowell Belen 38
- 39. Lambda Built-In Features » Containers are ephemeral entities that are easily created and destroyed » Preserved history and ability to roll back a bad deployment ( revert to previous version ) » Auto-managed horizontal scaling (Scale out / Scale In) » Automatic Load Balancing » Zero/Minimal Downtime during deployment © Rowell Belen 39
- 40. Environments should not be connected or otherwise intercommunicate © Rowell Belen 40
- 41. Solutions: » AWS Lambda supports running functions in different VPCs (dev, stage, prod) » Use separate AWS accounts per Environment © Rowell Belen 41
- 42. Promote immutable application artifacts from the lowest environment to the highest ( Deployment ) © Rowell Belen 42
- 43. Solutions: » Publish Versioned Build Artifacts to Repository » Continuous Integration » Continuous Delivery © Rowell Belen 43
- 44. Centralized Logging © Rowell Belen 44
- 45. Metrics » Better Dashboards » Custom Metrics and Events © Rowell Belen 45
- 46. Standardize Projects using Templates Custom Project Starter Kit © Rowell Belen 46
- 47. Other Things to Consider » AWS functions are recycled about every 5-8 hours » Container instances idle for about 5 minutes are destroyed » Cold starts can cause delay in response times » 50 MB max deployment package size » 5 minute running time limit / ~ 30 seconds if API Gateway triggered » 1000 default concurrent function executions across entire AWS account © Rowell Belen 47
- 48. Questions? © Rowell Belen 48