Note_Tech

All technological notes.

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Kubernetes - kube-proxy

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• Kubernetes - kube-proxy
  • kube-proxy

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kube-proxy

• kube-proxy

  • a networking component that runs on every node in a Kubernetes cluster.
  • used to maintain the network rules that allow communication to Services and the Pods behind them.

• Primary Roles

  • Service Implementation
    • Watches the API Server for Service and Endpoint objects.
    • Ensures that traffic sent to a Service (ClusterIP, NodePort, LoadBalancer) is routed to one of its backend Pods.
  • Load Balancing
    • Distributes requests across all healthy Pods behind a Service.
    • Uses round-robin or other mechanisms depending on the backend mode (iptables, IPVS).
  • Programming Network Rules
    • Manages iptables or IPVS rules on the node.
    • Ensures packets destined for a Service are redirected to the correct Pod IPs.

kubectl get pods -n kube-system
# kube-proxy-xbtjz                         1/1     Running   122 (4h29m ago)   148d

kubectl get daemonset -n kube-system
# NAME         DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR            AGE
# kube-proxy   1         1         1       1            1           kubernetes.io/os=linux   148d