This document provides an overview of AWS Lambda, a serverless compute service. It defines what serverless means (cloud provider manages servers rather than the user), describes Lambda's event-driven model and supported runtimes/languages. Use cases are given for image thumbnail generation. Limits include maximum function duration and package size. Pricing is outlined as free tier plus $0.20 per 1 million requests. The presenter provides a demo of Lambda deployment with Terraform.

1. AWS Lambda
Serverless, event-driven compute service
09.06.2017, AOE Internal Meetup, Julian Kleinhans

2. Julian Kleinhans
Software Architect @ AOE GmbH
Standort Krefeld, NRW
@kj187

3. What is AWS Lambda
Serverless compute service
Introduced by Amazon in November 2014

4. What means serverless
Serverless = no servers ?

5. What means serverless
NO, there are servers
But someone else is responsible
Cloud Provider

6. Goal behind serverless
Primarily focus on code
Not infrastructure
Capacity, Scaling, Monitoring, Logging, Security Patching ...

7. Replace serverless with ...
FaaS
Function as a service
CoD
Code on demand

8. Flow
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
Your Code

9. 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

10. Function
Write
single-purpose
stateless functions
single responsibility principle

11. Function
Runtimes
NodeJS 4.3 & 6.10
Java 8
Python 2.7
C#

12. Function
ZIP Package
handler-xyz.js
node_modules/*
Terraform example
resource "aws_lambda_function" "lambda_nodejs_example" {
filename = “directory/example-nodejs-lambda.zip"
function_name = "example_nodejs_lambda"
handler = ”handler-xyz.handler"
runtime = "nodejs6.10"
}

13. Use Case
1
2
3
4
Store image in S3
Lambda Event Trigger
Create thumbnail
Store thumbnail in S3

14. Use Case
E-Mail DeskPro Middleware TargetProcess
API Gateway
Create bug ticket
Close ticket
Create ticket Webhook
Event source Lambda
DeskPro -> TargetProcess (fully automated)

15. Limits
Maximum execution duration per request
=> 300 seconds
Alternative S3 Storage
Lambda function deployment package size (.zip/.jar file)
=> 50 MB
100 concurrent executions
1.000 invokes per second
Increases available via AWS customer service

16. 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

17. Demo
DEMO
https://github.com/kj187/aws_terraform_templates

18. Alternatives
Azure Functions
Microsoft
Google Cloud Functions
Google, beta
OpenWhisk
IBM

19. Thank You!