Intro to Kubernetes - Google IO Extended Grand Rapids

Transcript

1. Intro to Kubernetes
2. Outline • Who am I? • What is Kubernetes? • Basic Kubernetes primitives • How an example app might look • Real world example • Questions
3. Who am I? Thomas Wodarek @kc8zpq Site Reliability Engineer Wodarek Productions
4. What is Kubernetes?
5. What is Kubernetes? Greek for "helmsman" or "pilot" A docker container orchestrator k8s
6. Logical organization of a Kubernetes cluster
7. Logical organization of a Kubernetes cluster
8. Pod The basic building block of k8s Specifies a container (or containers) to be deployed together as a unit Look like a single “machine” from the inside
9. Deployments An abstraction above pods to manage replications and readiness Desired state configuration Scaling Rolling updates Rollbacks Liveness & Readiness Probes
10. Deployments An abstraction above pods to manage replications and readiness Desired state configuration Scaling Rolling updates Rollbacks Liveness & Readiness Probes
11. Service Provides a DNS name to access a service Based on selectors, it finds the pods that need to be load balanced Liveness & Readiness Probes
12. Service Provides a DNS name to access a service Based on selectors, it finds the pods that need to be load balanced Liveness & Readiness Probes
13. Namespace A scope for names Share a cluster with multiple environments and users
14. Namespace A scope for names Share a cluster with multiple environments and users
15. Volume A file storage location that lives as long as the pod does Some types back-end into persistent disk location (so that you don’t lose your data on restart)
16. Secret A safe and secure way to provide sensitive information to your pods Per namespace isolation Credentials Can be presented as a volume to pods
17. Allows you to push any amount of information, en mass, into containers Allows you to push implementation-specific details into a provided pod (see kube-lego example) I’ve even used it for environment variables Config-Maps
18. Live demo
19. Questions?
20. Thank you! Thomas Wodarek // @kc8zpq // github.com/thomaswo Presently exploring new opportunities: thomas@wodarek.com