Which Kubernetes component is primarily responsible for routing service traffic and managing IP rules?

Which Kubernetes component is primarily responsible for routing service traffic and managing IP rules?

• A. Kube-Proxy
• B. CoreDNS
• C. Kubelet
• D. Etcd

Answer: (A)

Kube-proxy handles routing service traffic and managing IP rules. It runs on every node and watches Services and Endpoints in the cluster, then configures the node’s networking (iptables or IPVS rules) so that requests directed at a service IP are forwarded to one of the healthy pods backing that service. It also handles simple load balancing across endpoints and updates the rules as pods scale up or down. CoreDNS is responsible for service name resolution inside the cluster, not traffic routing. Kubelet is the node agent that starts and monitors containers and pods on a node. Etcd is the cluster’s key-value store that persists state, not traffic routing.

Kube-proxy handles routing service traffic and managing IP rules. It runs on every node and watches Services and Endpoints in the cluster, then configures the node’s networking (iptables or IPVS rules) so that requests directed at a service IP are forwarded to one of the healthy pods backing that service. It also handles simple load balancing across endpoints and updates the rules as pods scale up or down.

CoreDNS is responsible for service name resolution inside the cluster, not traffic routing. Kubelet is the node agent that starts and monitors containers and pods on a node. Etcd is the cluster’s key-value store that persists state, not traffic routing.