Namespaces - neerajk555/Kubernetes GitHub Wiki

Let’s walk through creating and using namespaces with a simple Pod deployment.

Step 1: Create a Namespace

kubectl create namespace dev-team

Check if it's created:

kubectl get namespaces

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Step 2: Deploy a Pod into that Namespace

Create a file nginx-pod.yaml:

apiVersion: v1
kind: Pod
metadata:
  name: nginx-pod
  namespace: dev-team   #deploy into dev-team namespace
  labels:
    app: nginx
spec:
  containers:
  - name: nginx
    image: nginx

Apply it: kubectl apply -f nginx-pod.yaml

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Step 3: Verify the Pod is Running

kubectl get pods -n dev-team

If you try kubectl get pods without -n, it’ll check only in the default namespace.

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Step 4: Deploy Another Pod in a Different Namespace

kubectl create namespace qa-team

Now run another pod with the same name but in the new namespace:

# nginx-qa.yaml
apiVersion: v1
kind: Pod
metadata:
  name: nginx-pod      # same name is OK because different namespace
  namespace: qa-team
spec:
  containers:
  - name: nginx
    image: nginx

Apply it: kubectl apply -f nginx-qa.yaml

Verify:kubectl get pods -n qa-team

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Step 5: Clean Up

kubectl delete namespace dev-team

kubectl delete namespace qa-team