Avoid use of public DNS servers like 8.8.8.8 and 1.1.1.1 on OpenShift Container Platform

Solution Verified - Updated -

Issue

  • When configuring DNS during Day 1 operation or Day 2 operation why should I avoid using public DNS servers?
  • What can happen if I use a public DNS for lookups on my OpenShift Platform?
  • How does DNS selection work on OpenShift 4?

Environment

  • Red Hat OpenShift Container Platform (RHOCP) 4.x
  • Connected or disconnected clusters

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