Kubernetes Concepts

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External

Internal

Overview

Pod

One or more containers deployed together on one host, containing collocated applications that are relatively tightly coupled and run with a shared context. The containers in a pod share resources as IP addresses and volumes. The pod is the smallest unit that can be defined, deployed and managed. Kubernetes orchestrates pods.

Complex applications can be made of any pods.

OpenShift Pod

Volume

OpenShift Volume

etcd

A distributed key/value datastore for state within the environment.

OpenShift etcd

Scheduler

The scheduler is a component that runs on master and determines the best fit for running pods across the environment.

OpenShift Scheduler