[ovirt-users] Logical network setup with neutron

[Marcin Mirecki]

Hi Lakshmi,

Yes, only the v2 keystone api is supported at the moment.

The "Physical network" and "Interface mappings" are related.
"Physical network" defines the physical (external) network,
while "Interface mappings" maps this network to a specific interface
on the host.

"Physical network" is mapped to the "provider:physical_network"
parameter in a neutron network.
"Interface mappings" is mapped to the "physical_interface_mappings"
parameter in the neutron agent on the host.
Please look at the following link for a better explanation of how to connect
neutron to an interface:
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_openstack_platform/7/html/networking_guide/sec-connect-instance



On Mon, Nov 27, 2017 at 3:02 PM, Lakshmi Narasimhan Sundararajan <
lakshmi.n at msystechnologies.com> wrote:

> Hi Team,
> I am looking at integrating openstack neutron with oVirt.
> Reading the docs so far, and through my setup experiments, I can see that
> oVirt and neutron do seem to understand each other.
>
> But I need some helpful pointers to help me understand a few items
> during configuration.
>
> 1) During External Provider registration,
>
> a) although openstack keystone is currently supporting v3 api
> endpoints, only configuring v2 works. I see an exception otherwise.I
> have a feeling only v2 auth is supported with oVirt.
>
> b) Interface mappings.
> This I believe is a way for logical networks to switch/route traffic
> back to physical networks. This is of the form label:interface. Where
> label is placed on each Hosts network setting to point to the right
> physical interface.
>
> I did map label "red" when I setup Host networks to a physical Nic.
> And used "red:br-red, green:br-green" here, wherein my intention is to
> create a bridge br-red on each Host for this logical network and
> switch/route packets over the "red" label mapped physical nic on each
> host. And every vm attached to "red" logical network shall have a vnic
> placed on "br-red" Is my understanding correct?
>
> 2) Now I finally create a logical network using external provider
> "openstack neutron". Herein "Physical Network" parameter that I
> totally do not understand.
> If the registration were to have many interface mappings, is this a
> way of pinning to the right interface?
>
> I cannot choose, red, red:br-red... I can only leave it empty,
>
> So what is the IP address of the physical address argument part of
> logical network creation?
>
> "Optionally select the Create on external provider check box. Select
> the External Provider from the drop-down list and provide the IP
> address of the Physical Network". What this field means?
>
> I would appreciate some clarity and helpful pointers here.
>
> Best regards
>
> --
>
>
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