Namespace Management

Intermediate10 min

Create, organize, and manage Kubernetes namespaces with resource quotas and limit ranges for multi-tenant clusters.

Prerequisites

-kubectl configured

Steps

List all namespaces with status

View all namespaces and their current status.

$ kubectl get namespaces -o custom-columns='NAME:.metadata.name,STATUS:.status.phase,AGE:.metadata.creationTimestamp'

Create a namespace with labels

Create a new namespace and label it for organization.

$ kubectl create namespace staging && kubectl label namespace staging environment=staging team=platform

Set a resource quota on a namespace

Limit the total resources that can be consumed in a namespace.

$ kubectl create quota team-quota --namespace=staging --hard=cpu=4,memory=8Gi,pods=20,services=10

Resource quotas prevent a single team from consuming all cluster resources.

View resource usage in a namespace

Check current resource consumption against quotas.

$ kubectl describe quota --namespace=staging

Set the default namespace for kubectl

Change the default namespace so you do not need to specify -n on every command.

$ kubectl config set-context --current --namespace=staging

Full Script

full-script.sh

#!/bin/bash
# Namespace Management
set -euo pipefail

echo "=== All Namespaces ==="
kubectl get namespaces

echo ""
echo "=== Resource Quotas ==="
for ns in $(kubectl get namespaces -o jsonpath='{.items[*].metadata.name}'); do
  quota=$(kubectl describe quota -n "$ns" 2>/dev/null)
  if [ -n "$quota" ]; then
    echo "--- $ns ---"
    echo "$quota" | grep -E 'Name:|Used|Hard' | head -5
    echo ""
  fi
done

echo ""
echo "=== Current Context Namespace ==="
kubectl config view --minify -o jsonpath='{.contexts[0].context.namespace}' && echo "" || echo "default"

FAQ

Discussion

Loading comments...

#!/bin/bash # Namespace Management set -euo pipefail echo "=== All Namespaces ===" kubectl get namespaces echo "" echo "=== Resource Quotas ===" for ns in $(kubectl get namespaces -o jsonpath='{.items[*].metadata.name}'); do quota=$(kubectl describe quota -n "$ns" 2>/dev/null) if [ -n "$quota" ]; then echo "--- $ns ---" echo "$quota" | grep -E 'Name:|Used|Hard' | head -5 echo "" fi done echo "" echo "=== Current Context Namespace ===" kubectl config view --minify -o jsonpath='{.contexts[0].context.namespace}' && echo "" || echo "default"