a quick introduction to aws lambda

@ogeisser #Devoxx #AWS-Lambda

A quick introduction to AWS Lambda

Oliver Geisser

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AWS Compute Options

EC2

Virtual Machine Execution

ECS

Docker Container Execution

Function Execution

Lambda


Overview

Upload Code

Configure Trigger (Event Source)

Lambda invokes your code

Pay per invocation


Your Code Language Runtimes•  Node.js (0.10.36)

•  Java 8

•  Python 2.7

Execution Environment•  Amazon Linux AMI

•  Your code has complete control

•  Threads, Sockets, Filesystem, etc.

•  Requirement: your code should be stateless


Programing Model Concepts with language specific implementations•  Stateless function handler

•  Event data as parameter

•  Context support

•  Logging support

Deployment•  Package (ZIP file) your code & libs

•  Upload directly to Lambda or to S3


Invocation Types Event•  Asynchronous invocation

•  One-Way – no response

Request/Response•  Your code provides the response

•  Synchronous invocation


Integration Model: Push vs. Pull Pull•  Lambda polls the Event Source in a loop

Push•  Event Source invokes Lambda


Pull Example: Kinesis Pull•  Lambda polls��

Kinesis in a loop

•  Invokes function for��new data


Push Example: S3

Push•  S3 invokes Lambda��

with event invocation

•  Triggered by any S3 action


AWS Services triggering Lambda AWS Service Push vs. Pull Event vs. Req/Resp

S3 Push Event

Dynamo DB Pull Event

Kinesis Pull Event

SNS Push Event

SES Push Event

Cognito Push Req/Resp

Cloud Watch Push Event

Cloud Formation Push Req/Resp

Alexa Push Req/Resp


On-Demand Invocation Lambda API•  Directly call the Lambda function via the API

AWS API Gateway•  Maps API Gateway calls to Lambda function invocations

Scheduled•  Fixed rate and CRON expression support


Monitoring Metrics•  Automatic metrics��

through Cloud Watch

Logs•  All requests

•  Logs generated by your��code


Example: Thumbnail Creation


Miscellaneous Remarks Container Model is not documented•  There is a „container model“ behind the scenes

•  It‘s not documented

•  But „Freezing“ and „Thawing“ of containers is noticeable

„Cold“ Start Up Time•  There are language dependent different „cold“ startup times

•  Java is much slower than Node.js

•  This has a cost impact


Thank you Oliver Geisser

Twitter: @ogeisser

a quick introduction to aws lambda

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