[ironic][neutron][ops] Ironic multi-tenant networking, VMs

Jeremy Freudberg jeremyfreudberg at gmail.com
Fri May 3 04:27:13 UTC 2019

Thanks Julia; this is helpful.

Thanks also for reading my mind a bit, as I am thinking of the VXLAN
case... I can't help but notice that in the Ironic CI jobs, multi
tenant networking being used seems to entail VLANs as the tenant
network type (instead of VXLAN). Is it just coincidence / how the gate
just is, or is it hinting something about how VXLAN and bare metal get

On Wed, May 1, 2019 at 6:38 PM Julia Kreger <juliaashleykreger at gmail.com> wrote:
> Greetings Jeremy,
> Best Practice wise, I'm not directly aware of any. It is largely going
> to depend upon your Neutron ML2 drivers and network fabric.
> In essence, you'll need an ML2 driver which supports the vnic type of
> "baremetal", which is able to able to orchestrate the switch port port
> binding configuration in your network fabric. If your using vlan
> networks, in essence you'll end up with a neutron physical network
> which is also a trunk port to the network fabric, and the ML2 driver
> would then appropriately tag the port(s) for the baremetal node to the
> networks required. In the CI gate, we do this in the "multitenant"
> jobs where networking-generic-switch modifies the OVS port
> configurations directly.
> If specifically vxlan is what your looking to use between VMs and
> baremetal nodes, I'm unsure of how you would actually configure that,
> but in essence the VXLANs would still need to be terminated on the
> switch port via the ML2 driver.
> In term of Ironic's documentation, If you haven't already seen it, you
> might want to check out ironic's multi-tenancy documentation[1].
> -Julia
> [1]: https://docs.openstack.org/ironic/latest/admin/multitenancy.html
> On Wed, May 1, 2019 at 10:53 AM Jeremy Freudberg
> <jeremyfreudberg at gmail.com> wrote:
> >
> > Hi all,
> >
> > I'm wondering if anyone has any best practices for Ironic bare metal
> > nodes and regular VMs living on the same network. I'm sure if involves
> > Ironic's `neutron` multi-tenant network driver, but I'm a bit hazy on
> > the rest of the details (still very much in the early stages of
> > exploring Ironic). Surely it's possible, but I haven't seen mention of
> > this anywhere (except the very old spec from 2015 about introducing
> > ML2 support into Ironic) nor is there a gate job resembling this
> > specific use.
> >
> > Ideas?
> >
> > Thanks,
> > Jeremy
> >

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