Libvirt PXE uses uses wrong MAC to obtain config

Solution In Progress - Updated -

Issue

  • Virtual machines with the pxe_ssh Ironic driver, and the virtualized nodes get stuck in "wait call-back" when attempting to deploy an overcloud.
  • If more than 1 interface is attached, the VM will use the first NIC, vnet0, to obtain a DHCP lease, but then use the MAC from vnet1 in the URL when attempting to download the MAC specific PXE config file from http://x.x.x.x/pxelinux.cfg/xx-xx-xx-xx-xx-xx.
  • Multiple NIC's causes deploy to fail

Environment

  • Red Hat OpenStack 7.0

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