d.md

#Appendix D: Namespace Example

The following example creates a Kubernetes namespace for each team or user group using the kubectl command or YAML file. Any name prefixed with kube should be avoided as it may conflict with the namespace reserved by the Kubernetes system.

Kubectl command to create a namespace.

kubectl create namespace <insert-namespace-name-here>

To create a namespace using a YAML file, create a new file named my-namespace.yaml with the following content:

apiVersion: v1
kind: Namespace
metadata:
   name: <insert-namespace-name-here>

To apply the namespace, use:

kubectl create –f ./my-namespace.yaml

To create a new Pod in an existing namespace, switch to the desired namespace:

kubectl config use-context <insert-namespace-here>

To apply a new Deployment, use:

kubectl apply -f deployment.yaml

Alternatively, you can add the namespace to the kubectl command using:

kubectl apply -f deployment.yaml --namespace=<insert-namespace-here>

Or specify namespace:<insert-namespace-here> under metadata in the YAML declaration.

Once created, resources cannot be moved between namespaces. The resource must be deleted and created in a new namespace.