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  1. OpenShift Bugs
  2. OCPBUGS-19933

cluster-dns-operator corrupts /etc/hosts when fs full

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    • 4.12.z
    • 4.10.z
    • Networking / DNS
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    • Sprint 242, Sprint 243
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      This is a clone of issue OCPBUGS-4359. The following is the description of the original issue:
      —
      Description of problem:

      when fs full, update-dns-resolver fails to build a proper /etc/hosts, resulting in /etc/hosts only containing the openshift-generated-node-resolver lines, missing the localhost lines.

This causes issues on pods having hostNetwork: true  like openstack-cinder-csi-driver-controller

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

      OpenShift 4.10.39

      How reproducible:

      See: https://github.com/openshift/cluster-dns-operator/blob/a5ea3fcb7be49a12115bd6648403df3d65661542/assets/node-resolver/update-node-resolver.sh

      Steps to Reproduce:

      1. make sure the file system is full when running the cp at line 13
2. 
3.

      Actual results:

      /etc/hosts is missing the localhost lines

      Expected results:

      /etc/hosts should contain the localhost lines

      Additional info:

              rhn-support-misalunk Miheer Salunke
              openshift-crt-jira-prow OpenShift Prow Bot
              Melvin Joseph Melvin Joseph
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                Created:
                Updated:
                Resolved: