Serverless / FaaS / Lambda and how it relates to Microservices

transcript

munz & more

Serverless Architectures & Function as a Service (FaaS) OUGN / March 2017 Dr. Frank Munz

Frank Munz

• Founded munz & more in 2007

• 17 years Oracle Middleware,Cloud, and Distributed Computing

• Consulting and High-End Training

• Wrote two Oracle WLS andone Cloud book

Announced by Oracle #OOW2016

Serverless& FaaS

Cloud Computing:

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FaaS / Serverless

Architectures?

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CloudComputingConcepts

Our IT is an API

A. Cockroft / Netflix

Internet Gateway

Docker Cluster

Computers

Firewall

Access Management

AWS Console: Services

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AWS CLI

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$ aws ec2 describe-regions --output table

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Language

bindings

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True Elasticity

Pay Per Use

You own a massively parallel supercomputer.

Cloud Computing: Use it!

Cloud Computing

API Elasticity Payperuse

FullyProgrammableDataCenter

AmazonEC2OracleBareMetal

AWSBeanstalkOracleACCS

AWSLambdaAzure Functions

GoogleCloudFunctionsOracleTBD

Zeroconfiguration,automaticelasticity.

Truepayperuse.

LaunchConfiguration+Autoscaling Groups

+ScalingEventspay/h/server

Min/Max,AZ,trigger,cooldownperiod

IaaSpricing

API✅Elasticity?

Payperuse?

Serverless

“Serverless” Example

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• S3 = Simple Storage Serviceaka blob storage

• put (key, value)can be (filename, file)

• Offers REST interface

(live?) example: put 2 files to the cloud

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http://fmtestweb.s3-website.eu-central-1.amazonaws.com/

#python/boto 3s3.Object('fmtestweb','index.html').put(…)

Serverless Example: S3

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What you get:• Up to 5 TB per object• 14 worldwide regions

(region -> parameter in an API)• 3x replication to 3 different

availability zones (=DC) in a region• Availability 99.99%• Durability 99.999999999% (eleven 9s)

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Replicatedto3availabilityzones(=DC)

Availability99.99%Durability99.999999999% (eleven9s)

14worldwideregionsregion->APIparameter

The Outage March 2017

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• Never provision storage or a DB

• Off instance service = NO virtual server-> serverless

• NO web server

• Resource planning?-> Not for provisioning-> Cost prediction

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Werner Vogel’s blog is on S3: http://www.allthingsdistributed.com/

Pricing:– Free 5GB for 1 year anyway.

– $0.0245 per GB + $0.0054 per 1,000 requests

S3 is to dataas FaaS is to code

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FaaS: Key Characteristics

• Run a function, not servers, not runtime env-> Function as a Service (FaaS)

• Stateless • Triggered by events• Continuous, automated elasticity• True pay per use

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FaaS ImplementationsAmazon Google Microsoft Oracle

Name Lambda CloudFunctions AzureFunctions ?

Year 2014 2016 2016 2016

Status prod alpha beta announced

LanguageSupport

NodeJS 4.3.2,Java8,Python2.7, .Net1.0.1C#,nativeLinux

NodeJS JS,PHP, C#,F#,Python,bash,PowerShell

Remarks DeployfromgithuborBitBucket,CLI

Bundle functions,OneDriveandBotServiceintegration

Linked toEventHubCS?

Link https://aws.amazon.com/lambda/

https://azure.microsoft.com/en-us/services/functions/

https://cloud.oracle.com/home

Edit Code Inline / Upload

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npm node-lambda package for locally running and remotely deploying your node.js

event: event passed to functioncontext: runtime contextcallback: optional return

(or null)

Lambda Tech Details

• Event based with retry + dead letter Q

• Metering in 100 ms

• Chose the memory -> compute power

• Running in containers (not Docker)

• You can use threads and spawn processes

• You can use environment variables

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Lambda: Limits per Function

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Events to Trigger Functions

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EventsfromCloudService- API-Gateway- S3- SNS- Kinesis- Cognito- CloudFormation- CloudWatch

log/events/scheduled- CodeCommit- AppsusingAWSSDK

λVendorlock-in?

alsomultiplesources

Create Lambda

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Example 1: Simple Scenario

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Select Blueprint

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Test Code

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Example 2: API-Gateway

Design and expose API to consumer, including

• Can trigger Lambda• Authentication• Traffic management• Import Swagger definitions• Create JavaScript, Android, iOS SDKs• XML to REST conversion• Uses Cloud Front (CDN) internally

Pricing: #calls + outbound traffic (+cache)

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Image Recognition with Lambda

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https://github.com/awslabs/lambda-refarch-imagerecognition

Example 3:Image Recognition

Pay Per Use

Every started request is charged:

• First 1 million req/month are free+ 400,000 GB-seconds of compute time

• Only AWS resource where free tier is free forever.

• Pricing:$0.20 per 1 million req+ $0.00001667 per GBs

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Security

• Not discussed here: Are Clouds Safe?

• Container lifetime -> request = often milli-seconds

• No open ports

• You cannot call Lambdas directly:triggered by events, e.g API-GW or SDK

“Exploit video” by CCC: “Gone in 60ms”

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https://www.youtube.com/watch?v=YZ058hmLuv0

Microservices

Developing a single application as

• a suite of small services• each running in its own process / owns it‘s data• communicating with lightweight mechanisms

(M. Fowler / J. Lewis)

https://martinfowler.com/articles/microservices.html

FaaS = Microservice?

What are other options?

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FaaS vs. K8s Microservices

FaaS fulfills M. Fowler’s microservices definition

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AWS Lambda compared to Docker with Kubernetes

BenefitsofFaaS- serverless- zeroconfig autoscaling- truepayperuse

->higherabstraction

LimitsofFaaS- language/frameworkchoice- resourcelimits- executiontime/size- vendorlock-in->reducedflexibility

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Is𝛌 thenewμ ?

Software

Serverless Framework

Why a framework if your code runs in a “frame”?

• Repeating patterns: IAM, API-GW, S3 bucket etc

• NodeJS, Python, Java

• AWS and Azure

• Generates, deploys, runs Lambda in 3 LOCbased on generated YAML + .py file

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Serverless Framework

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AWS Greengrass

Lambda in embedded devices

• Linux 4.4+

• Locally execute Lambda triggered by local event

• Greengrass Core + IoT SDK

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Hardware

- 100TBStorage,256bitTPM- 3x10GB/sNICs- Clusterupto5,

99.999%datadurability- iSCSI,Ethernet,SIMCard- LambdainPython:Greengrass- S3PUT->Lambda- Lambdafunctions

->publicAPI,e.g.AWS- E-InkShippinglabelthatupdates- $300/10days

Snowball Edge (FaaS in a Box):

“Today’s tech entrepreneurs would be out of their minds to build out their own data centers rather than renting capacity from Amazon or another low-cost provider.”

www.munzandmore.com/blog

facebook.com/cloudcomputingbookfacebook.com/weblogicbook

@frankmunz

youtube.com/weblogicbook-> more than 50 web casts

Don’t be

TL;DR #serverless / #FaaSServerless ∋ FaaS / all major clouds / event driven /stateless / true pay per use /automatic scalability /integrates with other services / cross-cloud frameworksemerge / 𝛌 could be the new µ.

@frankmunz