Which of the following is NOT a Kubernetes component?

The Scheduler is a core Kubernetes control plane component responsible for assigning newly created Pods to available Nodes based on various constraints and resource requirements.

Docker is a containerization platform and runtime, which Kubernetes can integrate with as a Container Runtime Interface (CRI) implementation to run containers. However, Docker itself is not a core component of the Kubernetes control plane or node architecture. Kubernetes can also use other container runtimes like containerd or CRI-O.

The Cloud Controller Manager is a Kubernetes control plane component that embeds cloud-specific control logic, allowing the cluster to interact with the underlying cloud provider's API to manage resources like load balancers, persistent volumes, and node lifecycle.

Kube-proxy is a network proxy that runs on each node in the cluster, responsible for implementing the Kubernetes Service concept by maintaining network rules and performing connection forwarding.