Introduction to Kubernetes

In this talked I tried to explain what is Kubernetes as well as some of the many Kubernetes Objects that are available for us.

Transcript

1. Kubernetes 101 @tony0x01 #friyay
2. The road so far...
3. The Docker Ecosystem • Docker Engine • Docker CLI • Kitematic • Registry • Docker Hub • Docker Compose
4. Orchestration Docker Swarm Kubernetes
7. What is K8s? “(It) is an open-source system for automating deployment, scaling, and management of containerized applications.” (https://kubernetes.io/) “Kubernetes is a powerful open-source system, initially developed by Google, for managing containerized applications in a clustered environment. It aims to provide better ways of managing related, distributed components and services across varied infrastructure.” (An Introduction to Kubernetes, by Digital Ocean)
8. Kubernetes Objects
9. Kubernetes Objects 1/3 It is a “record of intent”. Thru them, you defined the desired state of your cluster: • which services are running and on which nodes • resources available to the applications running • policies of the behavior of these applications (restarts, upgrades, fault-tolerance) Once you create the Object, K8s will make sure what you desired to run is always running. source
10. Kubernetes Objects 2/3 You create, modify or change Objects thru the K8s API. We use the kubectl CLI, which will talk to the API server for us. We describe an Object using Yaml. source
11. Kubernetes Objects 3/3 An example Object. It’s a Deployment (we will see more about it soon).
12. PODs
13. POD
14. POD POD ip: 170.1.10.101 nginx php-fpm
15. Multiple PODs POD ip: 170.1.10.101 nginx php-fpm POD ip: 170.1.10.102 nginx php-fpm Internet
16. Service source
17. Services POD ip: 170.1.10.101 nginx php-fpm POD ip: 170.1.10.102 nginx php-fpm Internet
18. Services POD ip: 170.1.10.101 nginx php-fpm POD ip: 170.1.10.102 nginx php-fpm Internet Service ip: 170.1.10.103
19. Services POD ip: 170.1.10.101 label: name=webapp nginx php-fpm POD ip: 170.1.10.102 label: name=webapp nginx php-fpm Internet Service ip: 170.1.10.103 selector: name=webapp
20. Services POD ip: 170.1.10.101 label: name=webapp nginx php-fpm Internet Service ip: 170.1.10.103 selector: name=webapp POD ip: 170.1.10.102 label: name=webapp nginx php-fpm POD ip: 170.1.10.104 label: name=webapp nginx php-fpm
21. Services
22. Services POD ip: 170.1.10.101 label: name=webapp nginx php-fpm Internet Service ip: 170.1.10.103 selector: name=webapp POD ip: 170.1.10.102 label: name=webapp nginx php-fpm POD ip: 170.1.10.104 label: name=webapp nginx php-fpm
23. Services POD ip: 170.1.10.101 label: name=webapp nginx php-fpm Internet Service ip: 170.1.10.103 selector: name=webapp POD ip: 170.1.10.102 label: name=webapp nginx php-fpm POD ip: 170.1.10.104 label: name=webapp nginx php-fpm
24. Services POD ip: 170.1.10.101 label: name=webapp nginx php-fpm Internet Service ip: 170.1.10.103 selector: name=webapp POD ip: 170.1.10.102 label: name=webapp nginx php-fpm POD ip: 170.1.10.104 label: name=webapp nginx php-fpm
25. ReplicationControllers
26. ReplicationControllers
27. ReplicationControllers
28. Deployments
29. Deployments
30. StatefulSet, Volumes and Claims
31. Volumes and Claims
32. StatefulSet, Volumes and Claims
33. Demo time !!1!eleven!
34. That’s it!