Namespaces

Introduction to Namespaces

The first thing to know is that Kubernetes Namespaces are not the same as kernel namespaces.

• Kernel namespaces partition operating systems into virtual operating systems called containers

• Kubernetes Namespaces partition Kubernetes clusters into virtual clusters called Namespaces

Note: We’ll capitalize Namespace when referring to Kubernetes Namespaces. This follows the pattern of capitalizing Kubernetes API objects and clarifies that we’re referring to Kubernetes Namespaces, not kernel namespaces.

It’s also important to know that Namespaces are a form of soft isolation and enable soft multi-tenancy. For example, we can create Namespaces for our dev, test, and qa environments and apply different quotas and policies to each. However, they won’t stop a compromised workload in one Namespace from impacting workloads in other Namespaces.

Playground

Use the following terminal to execute the commands for this lesson.