Chaos Engineering: Why the world needs more resilient
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- Derek Morrison
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1 Chaos Engineering: Why the world needs more resilient
2 Oh hai, nice to meet you! Principal Gremlin Tech Advisory Greenpeace Enjoys Skateboarding, Snowboarding, Metal, Punk & Breaking Things tammybutow tb@gremlin.com
3 Our Gremlin Team Were Dropbox DigitalOcean National Australia Bank Queensland University of Technology PagerDuty Netflix Amazon Salesforce Google Datadog
4 Why the world needs: More Resilient Systems!
5 What is a resilient system? A resilient system is a highly available and durable system. A resilient system can maintain an acceptable level of service in the face of failure. A resilient system can weather the storm (a misconfiguration, a large scale natural disaster or controlled chaos engineering).
6 Let s review industry examples to understand why we need: Resilient Systems
7 Med Tech Industry: Cardiac monitoring is now done via a bluetooth device implanted in the body and a mobile app. The patient takes no action. Resilience of the device is the only thing the patient cares about.
8
9 Fin Tech Industry: People are changing jobs, moving homes, traveling and more. Systems need to not only keep up but also provide value anytime/anywhere.
10 A technical issue related to some routine maintenance. Impacted the purchase of over 2000 homes.
11 Transport Tech Industry: People are traveling so frequently for work and leisure. They need to be able to get where they need to go with no hassles.
12
13 Edu Tech Industry: More remote learning than ever before. Many students learn remotely. They need reliable access to teachers, students and learning materials.
14
15 Enviro Tech Industry: People need protection from bushfires, tsunamis, earthquakes and storms. Many of the warning systems for these disasters are legacy unreliable systems.
16 Insert photo of tsunami Saturday, 7 February Australia s all-time worst bushfire disaster
17 Saturday, 7 February Australia s all-time worst bushfire disasters
18 Saturday, 7 February Australia s all-time worst bushfire disasters
19 What do these systems have in common? The primary concern of the user is resilience of the system, in particular high availability.
20 Let s figure out how to create: A great future for everyone
21 What does a great future look like?
22 How do we create: More Resilient Systems?
23 Introducing: Chaos Engineering
24 What is Chaos Engineering?
25 Chaos Engineering: Thoughtful, planned experiments designed to reveal the weakness in our systems.
26 Inject something harmful, in order to build an immunity
27
28 We can inject harm in hosts, containers, pods, applications and more.
29 What is a Chaos Engineer?
30 Chaos Engineer: A vaccine research computer scientist. SREs / Production Engineers commonly practice Chaos Engineering.
31 Chaos Engineer: A vaccine research computer scientist.
32 Chaos Engineer: A vaccine research computer scientist.
33 What happens when the database is unreachable? The Bad Database Vaccine Does the database fail gracefully? Does the database have reliable and trustworthy monitoring? Bad DB Vaccine
34 Injecting Harm in DynamoDB
35 What do you need before you can start doing: Chaos Engineering
36 Prerequisites for Chaos Engineering
37 Prerequisites for Chaos Engineering 1. High Severity Incident Management 2. Monitoring 3. Measure the Impact of Downtime
38 Chaos Engineering Prerequisite #1: High Severity Incident Management
39 High Severity Incident Management: The practice of recording, triaging, tracking, and assigning business value to problems that impact critical systems.
40 gremlin.com/community
41 What are SEVs?
42 What are SEVs? The term SEV is derived from High Severity Incident
43 What are SEVs?
44 How Do You Determine SEV levels?
45 What is an example of SEV 0? SEV Name: SEV 0 Runaway Cow (auto generated code names help your team remember and refer to SEVs!) SEV Description: Nintendo Switch eshop is down and not working SEV Start Time: 08:40am Dec (Christmas Day) What is the availability impact? 100% What is the outage duration? 5 hours and 40 minutes
46 What is an example of SEV 0?
47 What is the The SEV Lifecycle?
48
49 How To Run A GameDay gremlin.com/community
50 How do you identify your critical systems?
51 What are your critical tier 0 systems? Traffic Database Storage
52 Chaos Engineering Prerequisite #2: Monitoring
53 Why Do You Need: Monitoring
54 Why Monitor - The Google SRE Book
55 How Should You Use Monitoring
56 Critical Services Dashboard gremlin.com/community
57 The Four Golden Signals - The Google SRE Book
58 The Four Golden Signals - The Google SRE Book Monitoring Signal Description Example Latency The time it takes to service a request. HTTP 500 error triggered due to loss of connection to a database Traffic Errors A measure of how much demand is being placed on your system The rate of requests that fail, either explicitly, implicitly or by policy. For a web service, this measurement is usually HTTP requests per second Catching HTTP 500s at your load balancer can do a decent job of catching all completely failed requests. Saturation How "full" your service is. Should also signal impending saturation. It looks like your database will fill its hard drive in 4 hours.
59 What Happens If You Do Chaos Engineering Without Monitoring?
60 You won t know what s happening
61 Chaos Engineering Prerequisite #3: Measure The Impact Of Downtime
62 Measure The Impact Of Downtime We need to understand how SEV 0s impact our customers and business.
63 Measure The Impact Of Downtime System Impact: Availability Durability Customer/Business Impact: Outcome Cost Time
64 What is the impact of the Nintendo Switch eshop SEV 0? SEV Description: Nintendo Switch eshop is down and not working What is the availability impact? 100% Time? 5 hours and 40 minutes Cost? Outcome? Switch users all over the world can t buy games
65 Now we re ready to get started with: Chaos Engineering
66 Chaos Engineering Use Case: Twilio
67 Chaos Engineering Case Study: Twilio Ratequeue Chaos has 3 goals: 1. Pick a shard 2. Kill primary 3. Monitor recovery.
68 Share The Chaos Engineering Journey Widely
69 Share The Chaos Engineering Journey Widely Do a Chaos Engineering Kick All Hands Send updates & progress reports Run Monthly Metrics Reviews Deliver Presentations
70 Don t Surprise Everyone!
71 What is Gremlin?
72 What is Gremlin?
73 Gremlin Chaos Engineering Attacks There are a range of attacks built-in and ready to run on Linux. Type of Attack Attack Gremlin Support (March 2018) Resource CPU Resource Disk Resource IO Resource Memory State Process Killer State Shutdown State Time Travel Network Blackhole Network DNS Network Latency Network Packet Loss
74 Live Chaos Engineering Demo
75 Create a Kubernetes Cluster gremlin.com/community
76 Create a Kubernetes Cluster Master Node 1 Node 2 Node
77 Host Level Chaos Engineering With Kubernetes
78 Create a Kubernetes Daemonset For Gremlin
79 Create a Kubernetes Daemonset For Gremlin Insert yams
80 View Your Kubernetes Pods
81 Run An Attack From The Gremlin Control Panel
82 Monitor Your Chaos Engineering Attack
83 Monitor Your Chaos Engineering Attack
84 Notify Your Team
85 Let s Review: The Path To Chaos Engineering
86 The Path To Chaos Engineering High Severity Incident Management Monitoring Measure the impact of downtime Chaos Engineering Make & Measure Improvements
87 Blast Radius and Advanced Chaos High Severity Incident Management Monitoring Measure the impact of downtime Chaos Engineering Make & Measure Improvements
88 How do you Make Improvements?
89 How do you make improvements? 1. Build - Build a new system / improve existing 2. Borrow - Use open source / contribute to OS 3. Buy - Use 3rd party systems 4. Brush up - GameDays / Team training 5. Break - Chaos Engineering / Failure injection 6. Begone - Decommission systems / delete code
90 Always Measure Improvements Tell a story of before and after with metrics
91 The world needs: More Resilient Systems
92 You can create: More Resilient Systems!
93 Join us on this journey! gremlin.com/community gremlin.com/slack
94 gremlin.com
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