The FaaS and the Furious

@Koenighotze
THE FAAS AND THE
FURIOUS
• Serverless computing (mostly) without marketing BS

@Koenighotze
What is Serverless and why should I care?
How does is work?
Architectural impact
Obviously a free lunch and a silver
bullet
Alternatives

@Koenighotze
QUICK HISTORY OF
THE CLOUD

@Koenighotze
INFRASTRUCTURE AS A
SERVICE

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PLATFORM AS A SERVICE

@Koenighotze
Provisioning
Scaling
Monitoring
Orchestration
Security
Deploying
…

@Koenighotze
Developers do not care
about
Docker

@Koenighotze
about
Kubernetes

@Koenighotze
about
Firewalls

@Koenighotze
But designing a real
system is hard

@Koenighotze
HOW TO DRAW AN OWL?

@Koenighotze
1. Draw some circles 2. Draw the rest of the damn owl

@Koenighotze
Sometimes circles are
enough

@Koenighotze
FUNCTION-AS-A-
SERVICE

@Koenighotze
On demand ephemeral
compute power

@Koenighotze
You cannot define something
by saying what it isn’t

@Koenighotze
The 12 Factor App
Manifesto

@Koenighotze
Serverless encodes the
12 Factor App principles

@Koenighotze
AWS LAMBDA IN A
NUTSHELL

@Koenighotze
What is a “function”?

@Koenighotze
Event driven
Stateless
Asynchronous
Single purpose

@Koenighotze
JA, JAVASCRIPT…
WIE AUF EINER PARTY WO ES
NUR KÖLSCH GIBT

@Koenighotze
How is it executed?

@Koenighotze
exports.handler = (evt, ctx, callback) => {
callback(null, "Hello World")
}

@Koenighotze
exports.handler = (evt, ctx, callback) => {
callback(null, "Hello World")
}
<filebasename>.<function>
index.handler

@Koenighotze
What is its
lifecycle?

@Koenighotze
Some time later…

@Koenighotze
INTEGRATION
TESTING

@Koenighotze
AWS Serverless
Application
Model

@Koenighotze
AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Hello World for Devcon
Resources:
HelloDevcon:
Type: AWS::Serverless::Function
Properties:
Timeout: 5
Runtime: nodejs6.10
Handler: index.handler
CodeUri: .

DEMO
@Koenighotze
TESTING WITH SAM

@Koenighotze
SERVERLESS
WEB APIS

@Koenighotze
Enter the API Gateway

@Koenighotze
Proxy integration

@Koenighotze
callback(null, {body: JSON.stringify(…)}))

DEMO
@Koenighotze
HELLO WORLD REST

@Koenighotze
TOOLS,
FRAMEWORKS AND
ALTERNATIVES

DEMO
@Koenighotze
LAMBDA API WITH
CLAUDIA

@Koenighotze
SERVERLESS
ARCHITECTURES

@Koenighotze
Operations glue
Public traffic
Mobile and IOT Backend
Stream processing

@Koenighotze
Conference serverless platform
Alexa skill

@Koenighotze
Serverless website

@Koenighotze
http:!//dschmitz.devcon.ui.s3-website-eu-west-1.amazonaws.com/

@Koenighotze
Alexa Devcon skill

@Koenighotze
Optimise for quick
start

@Koenighotze
Design for hot and
cold start

@Koenighotze
Embrace the platform

@Koenighotze
Maybe embrace the
platform

@Koenighotze
Use different
architectures

@Koenighotze
Principle of least
privileges

@Koenighotze
Winter is here
beware Spring

@Koenighotze
This is not your
fancy PaaS
(sorry, adrian)

@Koenighotze
Charge by execution

@Koenighotze
No more over- or
under-provision

@Koenighotze
FaaS Reduces upfront
investment

@Koenighotze
No more IPTable crap

@Koenighotze
DevOps right from the
beginning

@Koenighotze
Still immature
tooling

@Koenighotze
My VM is Lighter (and Safer) than your Container
Filipe Manco
NEC Laboratories Europe
lipe.manco@gmail.com
Costin Lupu
Univ. Politehnica of Bucharest
costin.lupu@cs.pub.ro
Florian Schmidt
orian.schmidt@neclab.eu
Jose Mendes
jose.mendes@neclab.eu
Simon Kuenzer
simon.kuenzer@neclab.eu
Sumit Sati
sati.vicky@gmail.com
Kenichi Yasukata
kenichi.yasukata@neclab.eu
Costin Raiciu
Univ. Politehnica of Bucharest
costin.raiciu@cs.pub.ro
Felipe Huici
felipe.huici@neclab.eu
ABSTRACT
Containers are in great demand because they are lightweight
when compared to virtual machines. On the downside, con-
tainers oer weaker isolation than VMs, to the point where
people run containers in virtual machines to achieve proper
isolation. In this paper, we examine whether there is indeed
a strict tradeo between isolation (VMs) and eciency (con-
tainers). We nd that VMs can be as nimble as containers, as
long as they are small and the toolstack is fast enough.
We achieve lightweight VMs by using unikernels for spe-
cialized applications and with Tinyx, a tool that enables
creating tailor-made, trimmed-down Linux virtual machines.
By themselves, lightweight virtual machines are not enough
to ensure good performance since the virtualization control
plane (the toolstack) becomes the performance bottleneck.
We present LightVM, a new virtualization solution based
on Xen that is optimized to oer fast boot-times regardless
of the number of active VMs. LightVM features a complete
redesign of Xen’s control plane, transforming its centralized
operation to a distributed one where interactions with the
hypervisor are reduced to a minimum. LightVM can boot a
CCS CONCEPTS
• Software and its engineering → Virtual machines;
Operating Systems;
KEYWORDS
Virtualization, unikernels, specialization, operating systems,
Xen, containers, hypervisor, virtual machine.
ACM Reference Format:
Filipe Manco, Costin Lupu, Florian Schmidt, Jose Mendes, Simon
Kuenzer, Sumit Sati, Kenichi Yasukata, Costin Raiciu, and Felipe
Huici. 2017. My VM is Lighter (and Safer) than your Container. In
Proceedings of SOSP ’17: ACM SIGOPS 26th Symposium on Operating
Systems Principles, Shanghai, China, October 28, 2017 (SOSP ’17),
16 pages.
https://doi.org/10.1145/3132747.3132763
1 INTRODUCTION
Lightweight virtualization technologies such as Docker [6]
and LXC [25] are gaining enormous traction. Google, for
instance, is reported to run all of its services in containers [4],
and Container as a Service (CaaS) products are available

@Koenighotze
Beware leaking
abstractions

@Koenighotze
Focus on what matters
avoid distraction

@Koenighotze
THANK YOU!
https:!//github.com/koenighotze/devcon-serverless-demo

The FaaS and the Furious

The FaaS and the Furious

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The FaaS and the Furious