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ARCHITECTURES (WITH INFRASTRUCTURE) Niko Köbler So ware-Architect, Developer & Trainer | | SERVERLESS AWS niko@n-k.de www.n-k.de @dasniko

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@dasniko

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DISCLAIMER This is silver bullet, no standard, but opinionated! NO

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SERVERLESS

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SERVER ? WHAT

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This is what actually mean... serverless

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Serverless is about the of servers. Build and run applications servers. management without thinking about

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OF COMPUTING Physical Servers in datacenters Virtual Machines in datacenters Virtual Machines in Cloud Containers on Virtual Machines Serverless as the unit of compute EVOLUTION

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COMPUTE Functions are the unit of deployment and scaling. No machines, VMs, or containers visible in the programming model. Permanent storage lives elsewhere. Scales per request; Users cannot over- or under-provision capacity. Never pay for idle (no cold servers/containers or their costs). Implicitly fault-tolerant because functions can run anywhere. BYOC - Bring Your Own Code. Metrics and logging are a universal right. SERVERLESS MANIFESTO

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Source: various AWS presentations

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? Unit of deployment and scale! PAAS

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PaaS FaaS is as DevOps NoOps vs. vs.

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AWS LAMBDA

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AWS Event Driven JVM-based languages (Java 8), JavaScript (Node.js), Python, C#, (more to come) Versions, Encrypted Environment Variables, Step Functions Pay as you use - in 100ms blocks (e.g. 100ms w/ 128MB memory = USD 0.000000208) LAMBDA

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AWS EXAMPLE LAMBDA NODE exports.handler = (event, context) => { console.log('Received event:', JSON.stringify(event)); }

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AWS EXAMPLE LAMBDA JAVA public class ImageProcessor implements RequestHandler { @Override public Void handleRequest(S3Event s3Event, Context context) { // get the S3 event data from the event request S3EventNotification.S3EventNotificationRecord record = s3Event.getRecords().get(0); // your code goes here... // return an object with specified type (see class generics) return null; } }

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AWS EVENTS S3 Cloud Watch Config AWS IoT Cognito SES API Gateway (no complete list) LAMBDA DynamoDB Cloud Formation Kinesis Code Commit SNS Echo / Alexa Cron

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GATEWAY API

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GATEWAY "Reverse Proxy" hides possible multiple service calls (aka "service composition", ESB?) distributes requests to proper service instances "Mock" services Caching, Throttling, DDoS attack protection, etc. API

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API GATEWAY NETFLIX

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GATEWAY "Reverse Proxy" hides possible multiple service calls (aka "service composition", ESB?) distributes requests to proper service instances "Mock" services Caching, Throttling, DDoS attack protection, etc. API

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GATEWAY AUTHENTICATION / AUTHORIZATION AWS Cognito / STS Custom Authorizer (Lambda Function, returning IAM policies) API

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API GATEWAY AUTHORIZATION

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GATEWAY API

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DYNAMODB

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DYNAMO Fully Managed NoSQL Data Store Schemaless Data Model Seamless Scalabiltiy, "no limits" Pay by Read-/Write-Capacity-Units DB

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Example CASES USE

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SERVERLESS ARCHITECTURE WEB

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SERVERLESS ARCHITECTURE WEB

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API Gateway with , Push and SNS SQS

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SKILLS BOTS (CHAT/VOICE) ALEXA

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TESTING

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TESTING Functions are easy to test, stateless and little to no dependencies UNIT TESTS

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TESTING Environment, Infrastructure max. 1024 of running processes/threads max. 100 concurrent Lambdas per Region no remote debugging INTEGRATION TESTS

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COMPETITORS?

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GOOGLE CLOUD FUNCTIONS JavaScript COMPETITOR

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MICROSOFT AZURE FUNCTIONS JavaScript, C#, Python, PHP COMPETITOR

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ON ? PREMISE

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COMPETITOR IBM BLUEMIX Bluemix Cloud & OnPremise Open Source / Apache License v2.0 JavaScript (Node.js), Python and... Swi ! Docker Support Function-Chaining OPENWHISK

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IBM LET'S GET STARTED OPENWHISK $ git clone https://github.com/openwhisk/openwhisk.git $ cd openwhisk/tools/vagrant $ vagrant up

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IBM JAVASCRIPT EXAMPLE Create the action in OpenWhisk Run the action Result OPENWHISK function main(params) { return {payload: 'Hello, ' + params.name}; } $ wsk action create hello hello.js $ wsk action invoke hello --blocking --result --param name Niko { "payload": "Hello, Niko" }

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Overview: Documentation, Logging & Monitoring, Metrics ! (typical things for distributed environments) Cloud Provider Binding / Dependency: APIs, Portability, Costs, SLAs DRAWBACKS

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? WANT TO START? Give a try! Manages all the Cloud-Resources and Deployment. CURIOUS serverless.com

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SERVERLESS.COM # Install serverless globally $ npm install serverless -g # Create an AWS Lamdba function in Node.js $ serverless create --template aws-nodejs # Deploy to live AWS account $ serverless deploy # Function deployed! $ http://api.amazon.com/users/update

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BUT POWERFUL No need to run/manage Application Servers Fast results, minimal effort, minimal TTM(!) Low costs, minimal financial risk Automatic Scalabiltiy and Availability "out-of-the-box" SERVERLESS

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THANK ! ANY ? Slides: Niko Köbler So ware-Architect, Developer & Trainer | | YOU QUESTIONS http://bit.ly/serverless-slides niko@n-k.de www.n-k.de @dasniko

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LINKS AWS Lambda: Amazon API Gateway: Google Cloud Functions: Microso Azure Functions: IBM OpenWhisk: IBM OpenWhisk SourceCode: Serverless Framework: https://aws.amazon.com/lambda https://aws.amazon.com/api- gateway https://cloud.google.com/functions https://azure.microso .com/services/functions https://developer.ibm.com/openwhisk https://github.com/openwhisk/openwhisk http://serverless.com