Instance fails to spawn if its IP from tenant network also assigned to Compute node

Solution Verified - Updated -

Issue

The following problem may be faced if firewall_driver=iptables_hybrid is configured in /var/lib/config-data/puppet-generated/neutron/etc/neutron/plugins/ml2/openvswitch_agent.ini (RHOSP 13) :

  • Instance is not be able to obtain IP address from Neutron DHCP server if the same IP address is configured on compute node itself.
  • DHCP client fails to get valid lease from Neutron DHCP agent if its IP address is assigned to its hypervisor.

Environment

  • Red Hat OpenStack Platform 10 is possibly affected
  • Red Hat OpenStack Platform 13 (prior to Z8 minor update)

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