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  1. OpenShift Bugs
  2. OCPBUGS-13785

EgressNetworkPolicy DNS resolution does not fall back to TCP for truncated responses

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      This is a clone of issue OCPBUGS-13150. The following is the description of the original issue:
      —
      This is a clone of issue OCPBUGS-12435. The following is the description of the original issue:
      —
      Description of problem:

      If the user specifies a DNS name in an egressnetworkpolicy for which the upstream server returns a truncated DNS response, openshift-sdn does not fall back to TCP as expected but just take this as a failure.

      Version-Release number of selected component (if applicable):

      4.11 (originally reproduced on 4.9)

      How reproducible:

      Always

      Steps to Reproduce:

      1. Setup an EgressNetworkPolicy that points to a domain where a truncated response is returned while querying via UDP.
2.
3.

      Actual results:

      Error, DNS resolution not completed.

      Expected results:

      Request retried via TCP and succeeded.

      Additional info:

      In comments.

              rhn-support-palonsor Pablo Alonso Rodriguez
              openshift-crt-jira-prow OpenShift Prow Bot
              Huiran Wang Huiran Wang
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                Created:
                Updated:
                Resolved: