Breaking Bad at Netflix: Building Failure as a Service

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Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/1NSdRSp. Kolton Andrus presents how Netflix, in order to harden their systems, designed “Failure as a Service” to allow anyone to test and validate how their systems handle failure. Filmed at qconnewyork.com. Kolton Andrus (@deelyle) is a Chaos Engineer on Netflix’s Edge Platform team. He designed and built FIT, a failure injection service. Prior to Netflix, he worked in Amazon Retail where he built Gremlin, Amazon’s failure service. In both companies he has served as a ‘Call Leader’, managing the resolution of large scale incidents.

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Presented at QCon New York
www.qconnewyork.com
Purpose of QCon
- to empower software development by facilitating the spread of
knowledge and innovation
Strategy
- practitioner-driven conference designed for YOU: influencers of
change and innovation in your teams
- speakers and topics driving the evolution and innovation
- connecting and catalyzing the influencers and innovators
Highlights
- attended by more than 12,000 delegates since 2007
- held in 9 cities worldwide

Overview
1. Why is Failure Testing Important?
2. How did we build Failure as a Service?
3. How has this made our systems more
resilient?

Why Failure Testing?
1. Makes our systems immune to failure
2. Prevents larger outages
3. Production verification is requisite

Failure testing is a form of Hormesis -
we imbibe the poison to become
immune.

Validating that our defenses will work
when called upon - by exercising them
at scale in production.

Building Failure as a
Service
FIT - Failure Injection Testing

The 5 W’s
1. Why
2. Who - Failure Scope
3. Where - Injection Point
4. What - Injected Failure
5. When - Ad-hoc & Automated

Zuul (Proxy)
API
Critical
Critical
Service
Secondary
Secondary
Service
Cache
C*
Circuit Breaker
Network Calls
Injection Points

“Knowing how the system behaves in
the face of failure is invaluable - our
assumptions are often incomplete”

Zuul (Proxy)
API
Critical
Critical
Critical
Secondary
Secondary
Secondary
Cache
C*
Circuit Breaker
Network Calls
Injected Failure
Failure
Metadata
FIT
Failure Scope
Decorated Request

Aggressive failure testing creates not
just robust programs, but an antifragile
programming culture.

Take Aways
1. Failure Testing is a worthwhile investment
2. Testing in Production is sustainable
3. It can harden your systems against failure
Kolton Andrus (@deelyle)

Resources
● Netflix Techblog - FIT
● “On Designing and Deploying Internet-Scale
Services” - James Hamilton
● Drift into Failure - Sidney Dekker
● Antifragile - Nassim Nicholas Taleb

Photo Credits
● Nuclear Blast - Mark Waldrep
● Forest Fire
● Poison
● Needle
● Explosion
● Robot

Watch the video with slide synchronization on
InfoQ.com!
http://www.infoq.com/presentations/failure-as-
a-service-netflix

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Breaking Bad at Netflix: Building Failure as a Service

1. Kolton Andrus (@deelyle)

2. InfoQ.com: News & Community Site • 750,000 unique visitors/month • Published in 4 languages (English, Chinese, Japanese and Brazilian Portuguese) • Post content from our QCon conferences • News 15-20 / week • Articles 3-4 / week • Presentations (videos) 12-15 / week • Interviews 2-3 / week • Books 1 / month Watch the video with slide synchronization on InfoQ.com! http://www.infoq.com/presentations /failure-as-a-service-netflix

3. Presented at QCon New York www.qconnewyork.com Purpose of QCon - to empower software development by facilitating the spread of knowledge and innovation Strategy - practitioner-driven conference designed for YOU: influencers of change and innovation in your teams - speakers and topics driving the evolution and innovation - connecting and catalyzing the influencers and innovators Highlights - attended by more than 12,000 delegates since 2007 - held in 9 cities worldwide

4. Overview 1. Why is Failure Testing Important? 2. How did we build Failure as a Service? 3. How has this made our systems more resilient?

7. Why Failure Testing? 1. Makes our systems immune to failure 2. Prevents larger outages 3. Production verification is requisite

9. Failure testing is a form of Hormesis - we imbibe the poison to become immune.

10.

11.

12. Validating that our defenses will work when called upon - by exercising them at scale in production.

13. Building Failure as a Service FIT - Failure Injection Testing

14.

15. What about the monkeys?

16. The 5 W’s 1. Why 2. Who - Failure Scope 3. Where - Injection Point 4. What - Injected Failure 5. When - Ad-hoc & Automated

17.

18.

19. Zuul (Proxy) API Critical Critical Service Secondary Secondary Service Cache C* Circuit Breaker Network Calls Injection Points

20.

21.

22.

23. “Knowing how the system behaves in the face of failure is invaluable - our assumptions are often incomplete”

24.

25. Zuul (Proxy) API Critical Critical Critical Secondary Secondary Secondary Cache C* Circuit Breaker Network Calls Injected Failure Failure Metadata FIT Failure Scope Decorated Request

26.

27. Great, does it work?

28.

29.

30.

31. Aggressive failure testing creates not just robust programs, but an antifragile programming culture.

32. Take Aways 1. Failure Testing is a worthwhile investment 2. Testing in Production is sustainable 3. It can harden your systems against failure Kolton Andrus (@deelyle)

33. Resources ● Netflix Techblog - FIT ● “On Designing and Deploying Internet-Scale Services” - James Hamilton ● Drift into Failure - Sidney Dekker ● Antifragile - Nassim Nicholas Taleb

34. Photo Credits ● Nuclear Blast - Mark Waldrep ● Forest Fire ● Poison ● Needle ● Explosion ● Robot

35. Demo Slides

36.

37.

38.

39.

40.

41. Watch the video with slide synchronization on InfoQ.com! http://www.infoq.com/presentations/failure-as- a-service-netflix

Breaking Bad at Netflix: Building Failure as a Service

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