Access to external network on multi homed OpenShift worker node is blocked when EgressIPs are in use

Solution Verified - Updated -

Issue

  • need to access S3 storage unrouted VLAN on secondary interface
  • need to access service on secondary interface

Environment

  • Red Hat Openshift Container Platform 4.10
  • OVN configured with RoutingViaHost option, following https://access.redhat.com/solutions/6962558
  • worker nodes with extra network interface card, which is plugged in a separate network where the external service is accessible
  • EgressIPs are configured

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