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Serverless use cases with AWS Lambda
The document outlines the concept of serverless computing using AWS Lambda, highlighting its benefits such as no server management, built-in scaling, and cost efficiency. It presents Lambda use cases including web applications, stream processing, automation, and IoT, while also detailing best practices for optimization and lifecycle management. Additionally, it includes resources for further learning about AWS Lambda and serverless architecture.
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Serverless use cases with AWS Lambda
- 1.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Boaz Ziniman, Technical Evangelist, AWS@zinimanServerless Use Cases with AWS LambdaIsraelCloud Meetup – October 2017
- 2.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.What does Serverless mean?No servers to provision ormanageScale with your usageBuilt in availability andfault-toleranceNever pay for idle/unusedcapacity
- 3.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Serverless runs on functions• Functions are the unit of deployment and scale• This scales per request!• Skip the boring parts, skip the hard parts
- 4.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Serverless applicationsFUNCTION SERVICES (ANYTHING)Changes indata stateRequests toendpointsChanges inresource stateNodePythonJavaC#EVENT SOURCE
- 5.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Example event sourcesData stores EndpointsConfiguration repositories Event/message sourcesAmazon S3 AmazonDynamoDBAmazonKinesisAmazonCognitoAmazon IoT AWS StepFunctionsAmazonAlexaAWSCloudTrailAWSCodeCommitAmazonCloudWatchAmazon SES Amazon SNS Cron eventsAmazonAPI GatewayAWSCloudformation…and more!
- 6.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.A few Lambda specific best practicesLambda is stateless à architect accordingly!• Assume no affinity with underlying compute infrastructure• Local filesystem and child processes may not extend beyondthe lifetime of the Lambda request
- 7.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Lambda considerations and best practices• Can your Lambda functionssurvive the cold?• Instantiate AWS clients anddatabase clients outside the scopeof the handler to take advantageof connection re-use.• Schedule with CloudWatch Eventsfor warmth• ENIs for VPC support are attachedduring cold startimport sysimport loggingimport rds_configimport pymysqlrds_host = "rds-instance"db_name =rds_config.db_nametry:conn = pymysql.connect(except:logger.error("ERROR:def handler(event, context):with conn.cursor() as cur:Executes duringcold startExecutes witheach invocation
- 8.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Lambda considerations and best practicesHow about a file system?• Don’t forget about /tmp(512 MB of scratch space)exports.ffmpeg = function(event,context){new ffmpeg('./thumb.MP4', function (err,video){if (!err) {video.fnExtractFrameToJPG('/tmp’)function (error, files) { … }…if (!error)console.log(files);context.done();...
- 9.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.Lambda Use Cases
- 10.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.#1: 3-Tier Web Application
- 11.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.3-Tier web applicationData stored inAmazonDynamoDBDynamic contentin AWS LambdaAmazon APIGatewayBrowserAmazonCloudFrontAmazonS3BrowserAmazonCloudFrontAmazonS3Amazon APIGatewayDynamic content inAWS LambdaData store in AmazonDynamoDB
- 12.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Amazon APIGateway AWSLambdaAmazonDynamoDBAmazonS3AmazonCloudFront• Bucket Policies• ACLs• OAI• Geo-Restriction• Signed Cookies• Signed URLs• DDOSAuthZIAMServerless web app security• Throttling• Caching• Usage PlansBrowserIAM
- 13.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Amazon APIGateway AWSLambdaAmazonDynamoDBAmazonS3AmazonCloudFront• Bucket Policies• ACLs• OAI• Geo-Restriction• Signed Cookies• Signed URLs• DDOSAuthZServerless web app security• Throttling• Caching• Usage PlansBrowserAmazonCloudFront• HTTPS• Disable HostHeader ForwardingAWS WAFIAMIAM
- 14.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Amazon APIGatewayAWSLambdaAmazonDynamoDBAmazonS3AmazonCloudFront• Access Logs in S3Bucket• Access Logs in S3 Bucket• CloudWatch Metrics-https://aws.amazon.com/cloudfront/reporting/Serverless web app monitoringAWS WAF• WebACL Testing• Total Requests• Allowed/BlockedRequests by ACLlogslogs• Invocations• Invocation Errors• Duration• ThrottledInvocations• Latency• Throughput• Throttled Reqs• Latency• Count• Cache Hit/Miss• 4XX/5XX ErrorsStreamsAWSCloudTrailBrowserCustom CloudWatchMetrics & Alarms
- 15.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Serverless web app lifecycle management• AWS SAM (Serverless Application Model) - blogAWSLambdaAmazon APIGatewayAWSCloudFormationAmazonS3AmazonDynamoDBPackage &DeployCode/Packages/SwaggerServerlessTemplateServerlessTemplatew/ CodeUripackage deployCI/CD Tools
- 16.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.http://bit.ly/ServerlessShophttps://github.com/patrick-michelberger/serverless-shop
- 17.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.#2: stream processing
- 18.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Characteristics of stream processing• High ingest rate• Near real-time processing (low latency from ingest toprocess)• Spiky traffic (lots of devices with intermittent networkconnections)• Message durability• Message ordering
- 19.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.DataGeneratorsAmazon Kinesis:StreamLambda:Stream ProcessorS3:Final Aggregated OutputLambda:Periodic Dump to S3CloudWatch Events:Trigger every 5 minutesS3:Intermediate AggregatedDataLambda:Scheduled DispatcherKPL:ProducerServerless stream processing architecture
- 20.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.DataGeneratorsFan-out pattern• Trade higher throughput & lower latency vs. strict message orderingAmazon Kinesis:StreamLambda:DispatcherKPL:Producer Lambda:ProcessorsIncrease throughput, reduce processing latency
- 21.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.#3: automation
- 22.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Automation characteristics• Respond to alarms or events• Periodic jobs• Auditing and Notification• Extend AWS functionality• Highly Available and scalable
- 23.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.AWS Lambda:Update Route53Amazon CloudWatch Events:Rule TriggeredAmazon EC2 InstanceState ChangesAmazon DynamoDB:EC2 Instance PropertiesAmazon Route53:Private Hosted ZoneTag:CNAME = ‘xyz.example.com’xyz.example.com A 10.2.0.134Automation: dynamic DNS for EC2 instances
- 24.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.AWS Lambda:Resize ImagesUsers upload photosS3:Source BucketS3:Destination BucketTriggered onPUTsAutomation: image thumbnail creation from S3https://github.com/awslabs/serverless-image-resizing
- 25.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.#4: IoT
- 26.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.IoT – Click to WebsiteMQTTAWSIoTStatic S3SiteReadSMSAmazonCloudFrontRead/Write
- 27.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.MQTTAWSIoTStatic S3SiteReadSMSAmazonCloudFrontRead/WriteIoT – Click to Website
- 28.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.IoT – Click to WebsiteMQTTAWSIoTStatic S3SiteReadSMSAmazonCloudFrontRead/Write
- 29.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.http://bit.ly/OneClickIoT
- 30.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Other resources• AWS documentation:http://docs.aws.amazon.com/lambda/latest/dg/welcome.html• Tons of compute blog posts:https://aws.amazon.com/blogs/compute/category/aws-lambda/• Lambda reference architecture:https://github.com/awslabs/lambda-refarch-webapp• Hello Retail:https://github.com/Nordstrom/hello-retail• Serverless beyond Functions – Serverless using IoT:https://medium.com/cloud-academy-inc/serverless-beyond-functions-cd81ee4c6b8d
- 31.© 2017, AmazonWeb Services, Inc. or its Affiliates. All rights reserved.Thanks!Boaz Ziniman, Technical Evangelist, AWS@ziniman