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simalexan Meet Slobodan

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simalexan

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simalexan Build with serverless! Its me!

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simalexan No server management / ops Scales per use Autofailover Don’t pay 
 for idle

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simalexan Business is more profitable Faster delivery

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simalexan Code needs to run on servers! Serverless? That’s not the point! You’re an idiot

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simalexan It is serverless, 
 the same way WIFI is wireless. Gojko Adzic

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simalexan

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simalexan Ok, lets try…

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simalexan AWS Lambda DynamoDB API Gateway AWS S3 Understanding serverless seems easy

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simalexan Until you reach AWS CloudFormation Did I miss some space here?! Max 200 resources?? Ack, this is ugly!

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simalexan You said it was easy, now I have to write ugly YAML… CloudFormation? There’s a better way… I’ve Wasted hours finding the docs…

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simalexan “Two birds - one stone” Building serverless apps with AWS CDK Aleksandar Simović

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simalexan Aleksandar Simović • Senior software engineer / Lead serverless engineer
 at ScienceExchange • Coauthor of the “Serverless Applications with Node.js” book • AWS Serverless Hero • AWS SAM / AWS SAM Lambda builders / AWS CDK • Almost 30 serverless apps on 
 AWS Serverless Application Repository • Saved more than $100k at ScienceExchange by implementing several
 serverless solutions.

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simalexan The “agenda” • Infrastructure Management Journey • AWS CDK • Short Demo • More examples

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simalexan In the beginning there was a console

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simalexan Console • Easy to get started • Not reproducible • Error prone • Time Consuming

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simalexan Scripted Resources
 (pre 2010)

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simalexan Scripted Resources
 (pre 2010) • What if an API call fails? • How to make updates? • How do you know if a resource is ready? • How to roll back?

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simalexan Resource Provisioning Engines • AWS CloudFormation • Terraform
 Using declarative configuration • AWS CloudFormation template (JSON/YAML) • HashiCorp Configuration Language (HCL)

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simalexan Resource Provisioning Engines • Easy to automate • Reproducible • Good Rollbacks and Updates • Awful syntax • No abstraction, lots of details

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simalexan Resource Provisioning Engines • Feels like a shopping list / no programming at all • Fair abstractions using Nested Stacks • YAML formatting issues (cfn-lint) • Documentation only online

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simalexan Document Object Models (DOMs) • Troposphere (Python) • SparkleFormation (Ruby) • GoFormation (Go)

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simalexan Document Object Models (DOMs) • Real code • Desired state (builds upon CloudFormation) • Abstractions are not built-in

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simalexan AWS CDK
 (Cloud Development Kit) Software Development Framework 
 Cloud Infrastructure and Applications

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simalexan Componentized • Application = multiple stacks • Stack = multiple constructs • Construct can have multiple levels:
 - can be a component 
 (API GW + Lambda + upload S3 bucket)
 
 - can be a single piece
 (a Lambda) • You write constructs as components

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simalexan Language support • TypeScript • Python • Java • C#

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simalexan How does it look like

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simalexan What would you write?

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simalexan How do you start • npm install -g cdk@0.34.0 • A configured AWS account + AWS CLI

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simalexan Demo • CDK CLI workflow • Demonstrate the workflow

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simalexan cdk init • npm install -g aws-cdk • mkdir hello-serverless-banjaluka • cdk init app —-language=typescript
 • Setups the project, lib, bin, cdk.json, tsconfig.json

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simalexan cdk build • Simply compiles the TypeScript files to javascript • A watch is available too

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simalexan cdk synth • Synthesizes a template from your CDK app. • A traditional CloudFormation template • Adds AWS::CDK::Metadata to every stack.

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simalexan cdk diff

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simalexan cdk deploy

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simalexan cdk destroy

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simalexan testing? • Standard testing for your codebase • cdk synth 
 (you can test the CF output) • programmable infrastructure tests

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simalexan stages? • Standard environment setup with your services • Different AWS accounts, belonging to an an organization • You can setup a CI/CD pipeline with AWS CDK

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simalexan Next steps • Try out the CDK • https://cdkworkshop.com • https://awslabs.github.io/aws-cdk
 The repository is constantly evolving • https://github/awslabs/aws-cdk

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simalexan Examples
 https://github.com/aws-samples/aws-cdk-examples A few serverless ones: • api-cors-lambda-crud-dynamodb • appsync-graphql-dynamodb • static-site • fargate-service-with-auto-scaling • … many more

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simalexan

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simalexan Questions? @simalexan serverless.pub Twitter Blog “Serverless Applications with Node.js" claudia40 40% off Thank you