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AWS LambdaServerless, event-driven compute service27.03.2017, AOE Developer Weekly, Julian Kleinhans

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Julian KleinhansSoftware Architect @ AOE GmbH

@kj187

302.05.2023

What is AWS Lambda

Alternatives• Azure Functions (Microsoft)• OpenWhisk (IBM)• Google Cloud Functions (beta)

Serverless compute service that runs your code in response to events Introduced by Amazon in

November 2014First major provider

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What means serverless

Serverless• No infrastructure to manage• Upload your code• Lambda handles Capacity, Scaling, Monitoring, Logging, Security patching ...

Focus on business logic

Not infrastructure

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Events

Event Sources (Event sources that trigger AWS Lambda)

• Amazon S3• Amazon DynamoDb • Amazon Kinesis• Amazon API Gateway (REST API)• On Demand via SDK

• ...

approx. 16-17 services

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Workflow

Changes in data state Request to endpoints Changes in resource state

Event source Function Services (anything)

Change/Add data state Trigger AWS resource Call HTTP endpoint

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Function

Function handler

NodeJS 4.3 & 6.10Java 8Python 2.7C#

Golang via NodeJS:child_process

ZIP Packagehandler.jsnode_modules/*

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Use Case

1

2

34

Store image in S3

Lambda Event Trigger

Create thumbnail

Store thumbnail in S3

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Use Case

E-Mail DeskPro Middleware TargetProcessAPI Gateway

Create bug ticket

Close ticket

Create ticket Webhook

Event source Lambda

DeskPro -> TargetProcess (fully automated)

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Limits

Maximum execution duration per request => 300 seconds

Alternative S3 Storage

Lambda function deployment package size (.zip/.jar file) => 50 MB

100 concurrent executions1.000 invokes per second Increases available via AWS customer service

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Costs

1 million requests and 400,000 GB-second of compute time every month, every customer for free

$0.20 per 1 million requests ($0.0000002 per request)

Never pay for idle

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Demo

DEMOhttps://github.com/kj187/aws_terraform_templates

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Thank youAny Questions ?