By internal network, I mean a network that does not correspond to a physical NIC. It exists purely to allow VMs to communicate with each other.<\/p>\n\n\n\n
With that said, let’s begin. oVirt requires that all networks, even internal ones, correspond to a NIC. So step one is to make the host think that it has an extra NIC. We can do this with a dummy interface:<\/p>\n\n\n\n
install dummy \/usr\/sbin\/modprobe --ignore-install dummy; \/usr\/sbin\/ip link set name dummy0 dev dummy\n<\/pre>\n\n\n\n
To have this automatically happen, those lines should also be added to \/etc\/modprobe.d\/dummy.conf.
Also, run the following to make sure the dummy module is added on reboot:<\/p>\n\n\n\necho \"dummy\" > \/etc\/modules-load.d\/dummy.conf<\/pre>\n\n\n\n
Finally, make the network script for the interface. This should be in \/etc\/sysconfig\/network-scripts\/ifcfg-dummy0:<\/p>\n\n\n\nDEVICE=dummy0\nBRIDGE=$Internal-network-name\nONBOOT=yes\nMTU=1500\nDEFROUTE=no\nNM_CONTROLLED=no\nIPV6INIT=no<\/pre>\n\n\n\n
Replacing $Internal-network-name with the name of the network you made on the oVirt web interface.
With all that done, when assigning networks to NICs in oVirt, you should now see dummy_1 as an option. Do be warned that this network will only exist on this host.<\/p>\n","protected":false},"excerpt":{"rendered":"