Creating custom namespaces in Kubernetes - Quick Revision & Summary

Recall & Review

beginner

What is a Kubernetes namespace?

A Kubernetes namespace is a way to divide cluster resources between multiple users or teams. It helps organize and separate resources inside the same cluster.

beginner

How do you create a custom namespace using kubectl?

You can create a custom namespace by running: <br>kubectl create namespace your-namespace-name

intermediate

What is the purpose of a namespace YAML file in Kubernetes?

A namespace YAML file defines the namespace as a resource in a declarative way. It can be applied with kubectl to create the namespace.

beginner

Show a simple YAML example to create a namespace called 'dev-team'.

apiVersion: v1<br>kind: Namespace<br>metadata:<br> name: dev-team

beginner

Why use namespaces in Kubernetes?

Namespaces help separate resources for different projects or teams, avoid name conflicts, and apply policies or limits per namespace.

Which command creates a new namespace named 'test-env'?

A kubectl apply namespace test-env

B kubectl new namespace test-env

C kubectl create namespace test-env

D kubectl set namespace test-env

The correct command to create a namespace is 'kubectl create namespace '.

What is the default namespace in Kubernetes if none is specified?

A kube-system

B default

C public

D global

The default namespace is called 'default' where resources go if no namespace is specified.

Which YAML 'kind' is used to define a namespace?

A Namespace

B Pod

C Service

D Deployment

The kind 'Namespace' is used in YAML files to define a namespace resource.

Namespaces in Kubernetes help to:

A Separate cluster resources for different teams

B Increase CPU speed

C Store container images

D Manage network traffic

Namespaces separate resources logically for teams or projects inside the same cluster.

How do you apply a namespace YAML file named 'namespace.yaml'?

A kubectl delete -f namespace.yaml

B kubectl create namespace.yaml

C kubectl run namespace.yaml

D kubectl apply -f namespace.yaml

Use 'kubectl apply -f ' to create or update resources from a YAML file.

Explain how to create a custom namespace in Kubernetes using both command line and YAML file.

Think about both direct commands and declarative YAML approach.

Describe why namespaces are useful in Kubernetes clusters.

Consider how namespaces help manage resources in a shared environment.