On Wed, Feb 15, 2017 at 1:55 PM, Marcin Mirecki <mmirecki@redhat.com> wrote:

Hello Gianluca,

OVN is a tech preview feature in 4.1
It's 'fully usable' as far as the basic networking functionality goes (network, ports, subnets),

OK, my question was mainly related to negative interference with other parts of oVirt.

I plan to use it side by side with normal networking so that in the same Cluster/Datacenter I can have VMs with "legacy" networks, VMs with OVN provided networks and eventually VMs with a mix of the two.

BTW: I see that while I can hot add an OVN nic to a VM, I cannot hot edit an OVN nic; I get the error:

Cannot edit Interface. External network cannot be changed while the virtual machine is running.

Any plan to solve this?

but it's still missing some parts like authentication, automatic host installation, some of the rest support and others.

Not a big problem for my tests.

With missing authentication do you mean that I could set up a non-oVirt host installing controller and driver parts an let it join the others without control?

Or keystone/similar integration?

You can use ovirtmgmt for the OVN tunnels. How ovirtmgmt is configured is also not relevant for OVN.
I am using a similar setup (without bonds) on my dev environment and it's working fine.

So I could have ovirtmgmt on a vlan based bonding and use it without problems?

In the sense that the tunnel basically already realizes the isolation from the ovirtmgmt network itself (what usually we do making vlans) without interfering in case I have a great exchange of data for example over the tunnel between 2 VMs placed on different hosts?

BTW: does it make sense to create another vlan on the bonding (that is already setup with vlans), assigning an ip on the hosts and then use it? Probably the answer above applies to this too...

In this case is it recommended to do it from inside oVirt itself or one can do it manually in the OS (supposing plain CentOS configuration for hypervisors)?

The same question could also apply to a general case where for example my hosts have to integrate into a dedicated lan in the infrastructure (eg for backup or monitoring or what else)... would I configure this lan from oVirt or better from hosts themselves?

Thanks in advance for your time

Gianluca