What is Kubernetes?

• Open-source platform for running cloud-native applications

Start with infrastructure

• Need something on top of it to run your apps on
• K8s serves as a layer for you to deploy your apps

Cloud-native apps: Built from small interacting services to build a useful app

• Opposite of Monolithic apps
• High scalable

Kubernetes cluster

• Bunch of Linux nodes, VMs, cloud instances
• Some form control plane and some form the worker nodes

Control Plane

• Scheduler, persistent store, API server, controllers
• Stateful plane

All commands and system components talk to the API server

The API

Kubernetes API is where everything is defined

RESTful API that uses HTTP methods to perform CRUD style actions

Define parts of app in YAML files as a overall desire of intent

• Change the current state to the desired state