Mastering Kubernetes - Second Edition

Using namespaces for safe multitenancy

Kubernetes namespaces are the perfect answer to safe multi-tenant clusters. This is not a surprise as this was one of the design goals of namespaces.

You can easily create namespaces in addition to the built-in kube system and default. Here is a YAML file that will create a new namespace named custom-namespace. All it has is a metadata item named name. It doesn't get any simpler:

apiVersion: v1 
kind: Namespace 
metadata: 
  name: custom-namespace 

Let's create the namespace:

> Kubectl create -f custom-namespace.yaml
namespace "custom-namespace" created
    
> kubectl get namesapces
NAME               STATUS    AGE
custom-namespace   Active    39s
default            Active    32d
kube-system        Active    32d

The status field can be active or terminating ...