Getting Started with AWS Lambda & Serverless Cloud

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<ol><li> 1. 2016, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Ian Massingham Technical Evangelist, Amazon Web Services Getting Started with AWS Lambda and the Serverless Cloud </li><li> 2. What is serverless computing? VMs Machine as the unit of scale Abstracts the hardware Containers Application as the unit of scale Abstracts the OS Serverless Functions as the unit of scale Abstracts the language runtime EC2 ECS AWS Lambda </li><li> 3. How do I choose? VMs I want to configure machines, storage, networking, and my OS Containers I want to run servers, configure applications, and control scaling Serverless Run my code when its needed EC2 ECS AWS Lambda </li><li> 4. Microservices and AWS Lambda AWS Lambda + Amazon API Gateway is the easiest way to create microservices Event handlers one function per event type Serverless back ends one function per API / path Data processing one function per data type </li><li> 5. Agenda Overview Use cases Recent launches and best practices Demo Q &amp; A </li><li> 6. AWS Lambda: Serverless computing Run code without servers. Pay only for the compute time you consume. Be happy. Triggered by events or called from APIs: PUT to an Amazon S3 bucket Updates to Amazon DynamoDB table Call to an Amazon API Gateway endpoint Mobile app back-end call And many more Makes it easy to: Perform real-time data processing Build scalable back-end services Glue and choreograph systems </li><li> 7. Continuous scalingNo servers to manage Never pay for idle no cold servers (only happy accountants) Benefits of AWS Lambda </li><li> 8. Pay-per request Buy compute time in 100 ms increments Low request charge No hourly, daily, or monthly minimums No per-device fees Never pay for idle! Free Tier 1 million requests and 400,000 GBs of compute every month, every customer </li><li> 9. Using AWS Lambda Bring your own code Node.js, Java, Python Bring your own libraries (even native ones) Simple resource model Select power rating from 128 MB to 1.5 GB CPU and network allocated proportionately Reports actual usage Flexible authorization Securely grant access to resources, including VPCs Fine-grained control over who can call your functions Flexible use Call or send events Integrated with other AWS services Build whole serverless ecosystems </li><li> 10. Using AWS Lambda Programming model AWS SDK built in (Python and Node.js) Lambda is the front end Use processes, threads, / tmp, sockets normally Stateless Persist data using Amazon DynamoDB, S3, or ElastiCache No affinity to infrastructure (cant log in to the box) Authoring functions Author directly using the console WYSIWYG editor Package code as a .zip and upload to Lambda or S3 Plugins for Eclipse and Visual Studio Command line tools Monitoring and logging Built-in metrics for requests, errors, latency, and throttles Built-in logs in Amazon CloudWatch Logs </li><li> 11. But what *is* AWS Lambda? Linux containers as an implementation, not a programming or deployment abstraction Process and network isolation, cgroups, seccomp, The worlds biggest bin-packing algorithm High speed, highly distributed work routing and placement Predictive capacity management Purpose-built, massively scaled language runtime delivery service Swagger interpreter (API Gateway) </li><li> 12. Amazon API Gateway: Serverless APIs Internet Mobile apps Websites Services AWS Lambda functions AWS API Gateway cache Endpoints on Amazon EC2 Any other publicly accessible endpointAmazon CloudWatch Amazon CloudFront Amazon API Gateway </li><li> 13. Benefits of Amazon API Gateway Create a unified API front end for multiple microservices DDoS protection and throttling for back-end systems Authenticate and authorize requests </li><li> 14. Use cases </li><li> 15. Lambda: Use cases Serverless app ecosystems Data processing Back ends </li><li> 16. Example: Amazon S3 bucket triggers Amazon S3 bucket events Original object Compressed object 1 2 3 AWS Lambda </li><li> 17. Why functions are the right answer Amazon DynamoDB Call Events Customize API </li><li> 18. Use case: Automatically scalable back ends 1. AWS Mobile SDK + Amazon Cognito for mobile app Or AWS IoT for devices 2. AWS Lambda runs the code 3. Amazon API Gateway (if you want your own endpoint) 4. Amazon DynamoDB holds the data AWS Lambda Amazon DynamoDB </li><li> 19. Use case: New app ecosystems: Alexa apps + Slack = serverless bots! Alexa, tell Slack to send, Im giving the demo now. Message retrieval through scheduled polling Kevin says, Break a leg! Message upload (via Slack API) Team (channel users) Slack </li><li> 20. Recent launches and best practices </li><li> 21. re:Invent 2015 Python Scheduled functions Longer running times (5 min.) Versioning Recent launches 2016 Higher code storage limits (from 5 GB to 75 GB per region) VPC New regions! Node.js 4.3.2 Swagger API import 1-minute schedules New! </li><li> 22. Function schedules: The how-to guide How can I keep a function warm (no cold starts)? Schedule it! How can I poll a queue (like SQS)? Schedule a function to read the queue. How can I get more timers? Have one scheduled function async invoke other functions. How can I get granularity finer than 1 minute? Run a background timer in your scheduled function. </li><li> 23. Function versioning: The how-to guide How can I get mutable configuration info? Read it (e.g. from DynamoDB) during function initialization. Wrap your config in a function and call it from your published code. How do I roll back in AWS Lambda? Using aliases, just switch what the alias points to. (As a collection, add API Gateway stages or CloudFormation.) How do I do blue/green deployments? AWS Lambda handles fleet deployments, but if you want to shape traffic, put a second traffic cop function in front. How can I lock a client/device onto an old version? Point them directly to that versions ARN. </li><li> 24. AWS Lambda VPC basics All Lambda functions run in a VPC, all the time You never need to turn on security its always on You can also grant Lambda functions access to resources in your own VPC How: Add VPC subnet IDs and security group IDs to the function config Typical uses: RDB, ElastiCache, private EC2 endpoints Allows access to peered VPCs, VPN endpoints, and private S3 endpoints Functions configured for VPC access lose internet access unless you have managed NAT or a NAT instance in the VPC Even if you have Auto-assign Public IP enabled Even if you have an internet gateway set up in your VPC Even if your security group allows all outbound traffic </li><li> 25. AWS Lambda VPC feature: Best practices VPC is optional dont turn in on unless you need it. The ENIs used by Lambdas VPC feature count against your quota. Ensure you have enough to match your peak concurrency levels (well consolidate where we can). DO NOT delete or rename these ENIs! Ensure your subnets have enough IPs for those ENIs. Specify at least one subnet in each Availability Zone Otherwise, Lambda will obey, but cant be as fault-tolerant. </li><li> 26. Demo </li><li> 27. Serverless web app architecture 1. Amazon S3 for serving static content 2. AWS Lambda for dynamic content 3. Amazon API Gateway for https access 4. Amazon DynamoDB for NoSQL data storage Dynamic content in AWS Lambda Data stored in Amazon DynamoDB API GatewayStatic content in Amazon S3 </li><li> 28. The serverless compute manifesto 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. </li><li> 29. Join the serverless revolution! </li><li> 30. Product manager or business analyst? Check out aws.amazon.com/lambda for scenarios and customer stories. 0. </li><li> 31. Developer? Go to the AWS Lambda console, create a function, and run it. (The first million invokes are on us!) 1. </li><li> 32. Congrats, youre a Lambda function expert! Add an event source or an HTTP endpoint. 2. </li><li> 33. Build a mobile, voice, or IoT back end with a few lines of code.3. </li><li> 34. Q &amp; A Follow AWS Lambda and Amazon API Gateway! aws.amazon.com/blogs/compute aws.amazon.com/lambda AWS Lambda forum t: @IanMmmm </li><li> 35. Follow AWS Lambda and Amazon API Gateway! aws.amazon.com/blogs/compute aws.amazon.com/lambda AWS Lambda forum t: @IanMmmm </li></ol>