☁️ Free practice test question from: Kubernetes Architecture (KCNA)

kube-controller-manager: This component runs various controller processes. One of these is the Replication Controller (or ReplicaSet controller in newer Kubernetes versions). The Replication Controller's core function is to ensure that a specified number of pod replicas are running at all times. In the scenario described, the Replication Controller would detect the discrepancy between the desired state (5 replicas) and the actual state (3 replicas) and then take action to create two new pods.

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kube-proxy: This component is responsible for network proxying and load balancing to services running on the nodes. It doesn't manage pod creation or replication.

etcd: This is the Kubernetes cluster's backing key-value store. It stores the cluster's configuration and state, but it doesn't actively reconcile the state. It's more of a database.

kube-scheduler: This component is responsible for scheduling newly created pods onto nodes. It decides where a pod should run, but it's the controller manager that decides if a pod needs to be created in the first place.