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CKA study material · question 723 of 1000

Why is externalTrafficPolicy: Local often chosen for a LoadBalancer Service?

  1. It removes the extra hop and preserves the client source address
  2. It guarantees every node has an endpoint
  3. It enables session affinity automatically
  4. It allows the Service to skip kube-proxy entirely
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Answer: A. It removes the extra hop and preserves the client source address

Local sends external traffic only to endpoints on the receiving node, which avoids the second hop and the source NAT it entails — at the cost of nothing being forwarded when that node has no endpoint.

Source: Virtual IPs and Service Proxies (Kubernetes) — Traffic policies › External traffic policy

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