ITGSS Certified DevOps Engineer Practice Test

What best practice should be followed regarding pods in Kubernetes?

1. All pods should run with root privileges

2. Pods should have unrestricted access to all resources

3. Pods should be properly isolated using namespaces

4. Pods should be deployed in a single cluster

The correct answer is: Pods should be properly isolated using namespaces

In the context of Kubernetes, properly isolating pods using namespaces is a fundamental best practice that enhances security, organization, and management of resources within a cluster. Namespaces provide a mechanism to divide cluster resources between multiple users or applications. By isolating pods in their own namespaces, you can avoid naming collisions and implement different policies and resource limits for various applications. This isolation is crucial in multi-tenant environments, as it helps ensure that one application's resource consumption does not impact others. Furthermore, namespaces allow for finer access control, as you can set Role-Based Access Control (RBAC) rules per namespace, thereby restricting access to specific pods based on the defined policies. This promotes a principle of least privilege, significantly reducing the risk of malicious actions or accidental mishaps impacting the entire Kubernetes cluster. The other options advocate practices that can lead to security vulnerabilities and resource management challenges. Running all pods with root privileges, for example, increases the risk of exploitation in case a pod is compromised. Unrestricted access to all resources can overwhelm the system, making it difficult to control resource usage and leading to service disruptions. While deploying pods in a single cluster could be practical in some scenarios, it does not inherently provide the same level of organization and security that namespaces offer. Thus