PodCTL Basics - What is Kubernetes?

Show: PodCTL Basics #1

Show Overview: The basics of Kubernetes.

Show Notes:

Kubernetes ConceptsKubernetes Code on GitHub Segment 1 - What is Kubernetes?

• Technology that spawned from Google’s internal “Borg” system for running application in containers. • Open source project donated to the CNCF in 2015. • Open source community of 1500+ engineers working on various sub-projects that make up the Kubernetes system.

Segment 2 - How does Kubernetes work?

• etcd • Kubernetes API • Kubernetes scheduler • Kubelet on each worker machine • Controllers

Segment 3 - What’s the relationship between Kubernetes and Containers?

• Containers describe what application bits run on a machine • Kubernetes is the framework that places containers on machines and ensures that the containers run in a well-defined manner (start/stop, highly available, load-balanced, etc.)

Segment 4 - Are there alternative technologies that work similar to Kubernetes?

• Kubernetes is ultimately a framework that schedules containers • Mesos Marathon • Docker Swarm • Nomad from Hashicorp • Lots of homegrown, DIY systems, mostly based on scripting

Segment 5 - How can a company get Kubernetes or use Kubernetes?

• Use the Open source software from the Kubernetes community • Use commercially available distributions of Kubernetes from multiple vendors • Consume Kubernetes-as-a-Service from multiple cloud providers

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