Namespace: Logical Isolation

A Namespace is a logical isolation boundary inside the cluster. The most common pattern is dev, staging, and prod.

Common operations

kubectl create ns dev
kubectl get ns
kubectl config set-context --current --namespace=dev

Quotas and permissions

• ResourceQuota caps resource usage
• LimitRange sets default requests/limits
• RBAC controls who can access what

Tips

• Deleting a Namespace removes everything inside it
• Use separate kubeconfigs or contexts per environment

Practical notes

• Start with a quick inventory: kubectl get nodes, kubectl get pods -A, and kubectl get events -A.
• Compare desired vs. observed state; kubectl describe usually explains drift or failed controllers.
• Keep names, labels, and selectors consistent so Services and controllers can find Pods.

Quick checklist

• The resource matches the intent you described in YAML.
• Namespaces, RBAC, and images are correct for the target environment.
• Health checks and logs are in place before promotion.

References

• Namespaces
• Administer Namespaces