Namespaces and Labels

Part of the Kubernetes course

A cluster with six Pods in it is easy. You run kubectl get pods, you see everything, and you know what each one is. A cluster with six hundred Pods across four teams and three environments is a different object entirely: kubectl get pods becomes a wall of text, two teams both want to call their app api, and deleting "the old test deployment" means picking the right eleven objects out of hundreds by eye.

Kubernetes solves this with two mechanisms that look similar and do completely different jobs. Namespaces divide the cluster into separate areas. Labels attach searchable tags to objects wherever they live. You need both, and knowing which is which saves you a lot of confusion later.