Kubernetes for the Legacy Warrior

MANAGERS: “Put everything in Kubernetes!”

ARCHITECTS: “That’s simple, just use microservices”

DEV-OPS ENGINEERS: “Have you tried a Kubernetes-based polyglot micro services application with Istio service mesh?”
YOU: “Yeah, that’s great. But I have a real job making my company money with a legacy application. I can’t just take two years to re-architect the world. Plus, I’m fairly certain 90% of what you just said is utter nonsense. So why should I care about any of this???
In this talk, we will go beyond the theory of containers, orchestration, and service-based architecture to talk about real techniques that real developers can use to start gaining the benefits of a container-focused ecosystem without completely starting over. I will use live code examples to show how to break apart a monolithic application and begin to deploy decoupled components in containers using the Kubernetes container-orchestration system.

Transcript

1. Kubernetes for the Legacy Warrior Matt Richards
2. 2 Matt Richards Staff Engineer at Infinite Campus INTERESTS • Software Architecture • Front-End Development • API Development • Containers • Kubernetes
3. 3 Mid-sized Educational Technology Company Serves K12 School Districts in the US 8.5 Million Students In Business for 26 years Infinite Campus
4. 4 The Future!!!
5. 5 STOP!!!!
6. “I don’t work at Netflix. I’m not designing highly elastic systems for hundreds of millions of concurrent users.” “Why Should I Care???” 6
7. Service-Based Architecture
8. 8 Let’s pretend you work for a mid-sized educational technology company Your product helps teachers manage their grade book It also will calculate student’s grades throughout the year It will also send out notifications to parents as assignments are scored
9. 9 How Might This Look?
10. 10 Let’s Look At Code!
11. 11 Uh oh – that’s a lot of teachers at once
12. 12 Ouch
13. 13 Service-Based and Decoupled
14. 14 Let’s Look At Code!
15. Deployments are Hard 15
17. Containers
18. 18 ”A Standard Unit of Software” https://www.docker.com/resources/what-container
20. 20 Let’s Look At Code!
21. Orchestration (Kubernetes)
22. 22 Greek for “Governor”, “Helmsman”, or “Captain”
23. 23 Container Deployment Automation and Coordination Declarative Deployment Files Self-Healing Massively Scalable Tutors your kids Does your taxes
25. 25 Let’s Look At Code!
26. 26 To Summarize Service-Oriented Architecture combined with Message Queuing allows for decoupled components Containers make it much easier to package and deploy individual services Kubernetes makes for a reliable way to describe your deployments as a set of related containers
28. 28 THANKS! Any questions? You can find me at cepster.github.io matt.richards@infinitecampus.com Twitter @cepster
29. 29 CREDITS Special thanks to all the people who made and released these awesome resources for free: Presentation template by SlidesCarnival Icons/Logos courtesy of cncf.io