GETTING EDGY VIDEO SERIES
Getting Edgy: Clusters, Nodes, Pods, and Containers — Oh My!
What’s the difference between a cluster, a node, a pod, and a container in Kubernetes?
Kubernetes introduces a lot of new vocabulary. Today, we will break down Kubernetes into several layers of abstraction from smallest to largest.
Container
A container bundles code and dependencies into one standard uniit of software, called a “container image”. This container image isolates code from the environment allowing the application to run consistently regardless of infrastructure or computing environment.
Pod
The first layer of Kubernetes-native abstractions, a pod is a way to bundle up and package containers into one logical grouping that represents a process in your cluster. A pod can have one or more containers that will all share the same environment.
Node
A node is the actual machine your pods are running on. They can be bare metal or virtual machines.
Cluster
A cluster is a grouping and management abstraction for nods. All of the orchestration and networking magic happens at the cluster level.
Learn More
- https://kubernetes.io/docs/tutorials/kubernetes-basics/explore/explore-intro/
- https://medium.com/google-cloud/kubernetes-101-pods-nodes-containers-and-clusters-c1509e409e16
