PodCTL Basics - What is Kubernetes?

Show: PodCTL Basics #1

Show Overview: The basics of Kubernetes.

Show Notes:

• Kubernetes Concepts
• Kubernetes 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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