Serverless Workflows with AWS Step Functions

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Introducing AWS Step Functions

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Hello! I am Michael Wittig. AWS since 2013. Freelancer. Everything Cloud and DevOps. 3

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● Covers fundamental parts of AWS: EC2, EBS, EFS, S3, RDS, DynamoDB, Lambda, VPC, IAM, Auto Scaling, ELB, … ● Learn how to build scalable, highly available, or even fault tolerant systems ● Focuses on Infrastructure as Code with CloudFormation manning.com or Amazon Book Amazon Web Services in Action 4

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● Running your web application on AWS with Docker: ECS and Fargate. ● Simple to use and fast to implement! ● A production-ready infrastructure for everyone. ● Including deployment pipeline and Infrastructure as Code. cloudonaut.io/rapid-docker-on-aws/ Book Rapid Docker on AWS 5

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“ AWS Step Functions is a web service that enables you to coordinate the components of distributed applications and microservices using visual workﬂows. https:/ /docs.aws.amazon.com/step-functions/latest/dg/welcome.html 2

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● Business Process (Onboarding New Customers, …) ● Execute a container in Fargate ● Infrastructure Automation (CloudFormation Drift Detection, …) ● Customize Deployment Workﬂow (ECS Deployment, …) ● ... Use Cases 3

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Anatomy Of a State Machine

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5 Wait Task

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6 Choice Task Succeed

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● Task ● Choice ● Fail / Succeed ● Pass ● Wait ● Parallel State Types 8

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Task Integrations ● Activity / worker ● AWS Lambda ● AWS Batch ● Amazon DynamoDB ● Amazon ECS 9 ● Amazon SNS ● Amazon SQS ● AWS Glue ● Amazon SageMaker ● External Input

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Error Handling ● Retry ● Catch 10

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11 Demo https:/ /github.com/michaelwittig/aws-ugs-june2019

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Amazon States Language 12 { "Comment": "An example of the Amazon States Language using a choice state.", "StartAt": "FirstState", "States": { "FirstState": { "Type": "Task", "Resource": "arn:aws:lambda:us-east-1:123456789012:function:FUNCTION_NAME", "Next": "ChoiceState" }, "ChoiceState": { "Type" : "Choice", "Choices": [{ "Variable": "$.foo", "NumericEquals": 1, "Next": "FirstMatchState" }], "Default": "DefaultState" }}}

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“ Use Step Functions whenever a Lambda function needs to wait/poll longer than 15 minutes in the worst case. 13

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Blog cloudonaut.io 6