ITGSS Certified DevOps Engineer Practice Test

Which component manages controller processes such as DaemonSet in Kubernetes?

1. Scheduler

2. ControllerManager

3. API Server

4. Worker Node

The correct answer is: ControllerManager

The component responsible for managing controller processes such as DaemonSet in Kubernetes is the ControllerManager. In Kubernetes, the Controller Manager runs controllers that regulate the state of the system, ensuring that your desired configurations are maintained. Controllers are control loops that watch the state of your cluster, typically through the API server, and make or request changes where needed. For instance, a DaemonSet controller ensures that a copy of a pod runs on all or specific nodes in the cluster, managing the deployment and scaling of these pods. This involves monitoring the current state of the pods and taking action when the actual state doesn’t match the desired state defined by the DaemonSet. While the Scheduler is responsible for placing pods onto the appropriate nodes, and the API Server serves as the front end for the Kubernetes control plane handling requests, neither of these components directly manages DaemonSets. The Worker Node is where the containers are executed and does not handle the management of controller processes. Thus, the ControllerManager is specifically designed to manage and regulate such tasks, making it the correct choice.