Kind Concepts

Internal

• Kind

Overview

kind is a tool for running local Kubernetes clusters using Docker container "nodes". kind was primarily designed for testing Kubernetes itself, but may be used for local development or CI.

Cluster

A Kubernetes cluster can be created with kind create cluster. The "nodes" are implemented as Docker containers. Upon creation of a default cluster, it will report two nodes, "kind-control-plane" and "kind-worker". The corresponding Docker containers are:

CONTAINER ID   IMAGE                                                         COMMAND                  CREATED             STATUS             PORTS                                                 NAMES
3108457ff1b6   [...]/kind:v1.27.3-3966ac76   "/usr/local/bin/entr…"   59 minutes ago      Up 59 minutes                                                            kind-worker
c90cb24cc040   [...]kind:v1.27.3-3966ac76   "/usr/local/bin/entr…"   59 minutes ago      Up 59 minutes      127.0.0.1:6443->6443/tcp, 127.0.0.1:9999->30999/tcp   kind-control-plane
2702defb0752   [...]/registry:2                          "/entrypoint.sh /etc…"   About an hour ago   Up About an hour   127.0.0.1:5001->5000/tcp                              kind-registry

What is a kind cluster? Where does it live?

"Node" Image

https://kind.sigs.k8s.io/docs/design/node-image

The “node” image is a Docker image for running nested containers, systemd, and Kubernetes components.