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  1. Fast Datapath Product
  2. FDP-2958

QE verification: [RFE] Make OVN DNS TTL configurable

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      ( ) The bug has been reproduced and verified by QE members
      ( ) Test coverage has been added to downstream CI
      ( ) For new feature, failed test plans have bugs added as children to the epic
      ( ) The bug is cloned to any relevant release that we support and/or is needed

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      ( ) The bug has been reproduced and verified by QE members ( ) Test coverage has been added to downstream CI ( ) For new feature, failed test plans have bugs added as children to the epic ( ) The bug is cloned to any relevant release that we support and/or is needed
    • rhel-9
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      This ticket is tracking the QE verification effort for the solution to the problem described below.

      What's the feature?

      Currently, if OVN is configured to reply for DNS requests, it always replies with a hardcoded DNS_DEFAULT_RR_TTL, with is 3600 seconds.  It should be configurable instead.

      Why is it needed?

      In a dynamic cloud environment workloads can come and go quickly.  Services can be re-spawned on different IP addresses.  But if other workloads may cache the DNS reply for up to an hour, they may have trouble connecting to the service that was moved to a different IP.  For example, default DNS TTL in OpenShift is just 5 seconds, which allows a very fast service fail-over to a new pod.

      Who will benefit? 

      OpenStack allows to use OVN DNS for VMs and services running in it.  This may be a good thing to have TTL configurable, so the connection issues can be avoided on VM fail-over.  Other environments may also find this functionality useful.

              ovn-qe OVN QE
              imaximet@redhat.com Ilya Maximets
              OVN QE OVN QE
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                Created:
                Updated: