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The art of the state
- 1. © 2020, Amazon Web Services, Inc. or its Affiliates. iLyas Bakouch Solutions Architect @AWS 22/10/2020 The Art Of The State Coordinating services using AWS Step Functions
- 2. What will this session cover? Getting things done with Distributed Services Introducing Orchestration Service Orchestration made easy using State machines AWS Step Functions: State machines in the cloud Where to Learn More
- 4. In a Monolith, everything gets deployed together
- 5. With Microservices, we split the work between multiple systems
- 6. Microservices can give us increased agility and scalability
- 7. But distributed systems can be harder to coordinate and debug
- 9. Processing a new account application requires some coordination Account Applications Accounts Accept New Application Create Account Data Checking Check Identity Docs Check Address Consolidate Data Checks Human Review Approve or Reject Human Review Handle Human Decisions List Flagged Applications
- 10. Here's a simplified banking system Account Applications Accounts Accept New Application Create Account Data Checking Check Identity Docs Check Address Consolidate Data Checks Human Review Approve or Reject Human Review Handle Human Decisions List Flagged Applications
- 11. In Orchestration one process manages state and calls appropriate services in turn Account Applications Accounts Data Checking Human Review
- 14. Account Applications Accounts Data Checking Human Review Check Identity Check Address Human Review
- 15. Account Applications Accounts Data Checking Human Review Check Identity Check Address Human Review Create Account
- 16. Example Orchestration Processing new bank account applications
- 26. A State Machine Describes a collection of computational steps split into discrete states Has one starting state and always one active state (while executing) The active state receives input, takes some action, and generates output Transitions between states are based on state outputs and rules that we define
- 27. AWS Step Functions Fully-managed state machines on AWS Resilient workflow automation Built-in error handling Powerful AWS service integration First-class support for integrating with your own services Auditable execution history & visual monitoring
- 29. State Types Task Execute work Choice Add branching logic Wait Add a timed delay Parallel Execute branches in parallel Map Process each of an input array's items with a state machine Succeed Terminate successfully or ends a branch of Parallel or an iteration of Map Fail Terminate the state machine and mark execution as a failure Pass Passes input to output
- 30. Step Functions service integrations Amazon Elastic Container Service AWS Lambda AWS Batch Amazon DynamoDB Amazon SageMaker AWS Glue AWS Step Functions Amazon Simple Notification Service Amazon Simple Queue Service
- 31. Get Building
- 32. Development Tips Step Functions Local https://docs.aws.amazon.com/step-functions/latest/dg/sfn-local.html Statelint https://github.com/awslabs/statelint Serverless Framework Plug-in https://github.com/horike37/serverless-step-functions Visual Studio Code aws-step-functions-constructor extension https://marketplace.visualstudio.com/items?itemName=paulshestakov.aws-step-functions-constructor
- 33. Get started building with AWS Step Functions Workshop: Intro to Service Coordination ~2 hours https://step-functions-workshop.go-aws.com/ Developer Guide ~2 hours https://docs.aws.amazon.com/step-functions/latest/dg/welcome.html Reference Architectures https://aws.amazon.com/step-functions/resources/
- 34. © 2019, Amazon Web Services, Inc. or its Affiliates. Thank you! iLyas Bakouch Solutions Architect @AWS ibakouch@amazon.com