[RHOCP 4] DNS Local Preference is not working for TCP requests with OpenShift SDN CNI

Solution Verified - Updated -


  • TCP DNS requests are not resolved by Local DNS endpoint, intermittently requests are sent to other DNS endpoints
  • Is it possible to resolve DNS queries using the local DNS endpoint for TCP?
  • UDP DNS requests are resolved by Local DNS endpoint, whereas for TCP random DNS endpoints are selected.


  • Red Hat OpenShift Container Platform (RHOCP)
    • 4
  • Container Network Interface (CNI)
    • OpenShiftSDN

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