Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

A Kubernetes administrator deploys a StatefulSet called mongo in the prod namespace. The application expects each replica to reach its peers using hostnames such as mongo-0.mongo.prod.svc.cluster.local. However, DNS queries currently return only a single virtual IP for the Service, so the replicas cannot locate one another directly. The existing Service manifest is:

apiVersion: v1
kind: Service
metadata:
  name: mongo
  namespace: prod
spec:
  selector:
    app: mongo
  ports:
  - port: 27017

Which single modification will convert this Service into a headless Service that returns the individual Pod IP addresses and bypasses kube-proxy load balancing?

  • Set sessionAffinity: ClientIP in the Service spec.

  • Change the Service type to NodePort.

  • Insert clusterIP: None under spec.

  • Add publishNotReadyAddresses: true to the Service spec.

CompTIA Linux+ XK0-006 (V8)
Automation, Orchestration, and Scripting
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