DevOps with Kubernetes - Second Edition

Namespaces

Kubernetes namespaces allow us to implement isolation of multiple virtual clusters. Objects in different namespaces are invisible to each other. This is useful when different teams or projects share the same cluster. Most resources come under a namespace (these are known as namespaced resources); however, some generic resources, such as nodes or namespaces themselves, don't belong to any namespace. Kubernetes has three namespaces:

• default
• kube-system
• kube-public

If we don't explicitly assign a namespace to a namespaced resource, it'll be located in the namespace of the current context. If we never add a new namespace, a default namespace will be used.

Kube-system namespaces are used by objects created by the Kubernetes system, ...