OCP4: EgressIP NAT table health check tooling on 4.14 and later (OVNkube-IC)

Solution In Progress - Updated -

Issue

  • You suspect there is an issue with EgressIP forwarding traffic incorrectly on your openshift cluster running OVN-kubernetes on 4.14 and later.
  • Intermittently, egressIP calls are not snatted properly via their expected egressIP host node but are snatted errantly through the host node where the pod is scheduled making the call.
  • Duplicate/Stale NAT entries on EgressIP suspected

Environment

  • Red Hat OpenShift Container Platform (RHOCP) 4.14 and later can run this script
  • OVNKubernetes (using Inter-Connect)
  • Stale NAT issues as outlined in the ISSUE section have only been observed in 4.16 and later at time of writing.

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