[kolla] single Network interface

Satish Patel satish.txt at gmail.com
Fri Oct 21 09:49:31 UTC 2022


Here is the doc to deploy kolla using a single network interface port.
https://www.keepcalmandrouteon.com/post/kolla-os-part-1/

On Thu, Oct 20, 2022 at 4:46 AM Sean Mooney <smooney at redhat.com> wrote:

> I have not been following this too cloesly and sorry to top post but its
> possibel to deploy multi node openstack using a singel interface.
> i often do that with devstack and it shoudl be possibel to do with kolla.
>
> first if you do not need vlan/flat tenant networks and and geneve/vxlan
> with ml2/ovs or ml2/ovn is sufficent then the tunell endpoint ip can just be
> the manamgnet interface. when im deploying wiht devstack i just create a
> dumy interfaces and use that for neutorn
> so you shoudl be able to do that for kolla-ansible too just have a
> playbook that will create a dumy interface on all host and set that as the
> neutron_interface.
>
> in kolla all other interface are shared by defautl so its only the
> nuetorn_interface for the br-ex that need to be managed.
> this approch reqired yuo to asign the gateway ip for the external network
> to one of the contolers and configre that host in your router.
>
> the better approch whihc allows provider networks to work and avoids the
> need to asisng the gateway ip in a hacky way is use macvlan interfaces
> i dont thinki have  an example of this form my home cloud any more since i
> have redpeloyed it but i previoulsy used to create macvlan sub interfaces
>
> to do this by hand you would do somehting like this
>
> sudo ip link add api link eth0 type macvlan mode bridge
> sudo ip link add ovs link eth0 type macvlan mode bridge
> sudo ip link add storage link eth0 type macvlan mode bridge
> sudo ifconfig api up
> sudo ifconfig ovs up
> sudo ifconfig storage up
>
>
> you can wrap that up into a systemd service file and have it run before
> the docker service.
> if your on ubuntu netplan does not support macvlans currently but you can
> do it the tradtional way or wiht systemd networkd
>
> Macvlan allows a single physical interface to have multiple mac and ip
> addresses.
> you can also do the same with a linux bridge but that is less then ideal
> in terms of performance.
> if your nic support sriov another good way to partion then nice is to use
> a VF
>
> in this case you just put a trivial udev rule to allocate them or use
> netplan
> https://netplan.io/examples its the final example.
>
>
> macvlan works if you dont have hardware supprot for sriov and sriov is a
> good option otherwise
>
> On Thu, 2022-10-20 at 11:06 +0900, Bernd Bausch wrote:
> > SInce you can easily have five to ten different networks in a cloud
> > installation, e.g. networks dedicated to object storage, provider
> > networks for Octavia, a network just for iSCSI etc, VLANs are (or used
> > to be?) a common solution. See for example the (sadly, defunct) SUSE
> > OpenStack cloud
> >
> https://documentation.suse.com/soc/9/html/suse-openstack-cloud-crowbar-all/cha-deploy-poc.html#sec-depl-poc-vlans
> .
> >
> > On 2022/10/20 8:50 AM, Clark Boylan wrote:
> > > On Wed, Oct 19, 2022, at 4:44 PM, Michal Arbet wrote:
> > > > Hmm,
> > > >
> > > > But I think there is a problem with vlan - you need to setup it in
> OVS,
> > > > don't you ?
> > > There was also a bridge and a veth pair involved:
> https://opendev.org/opendev/puppet-infracloud/src/commit/121afc07bdd277d8ba3ba70f1433d5e6a4a4b14e/manifests/veth.pp
> > >
> > > Possibly to deal with this? Like I said its been a long time and I
> don't remember the details. I just know it was possible to solve at least
> at the time. Linux gives you a whole suite of virtual network components
> that you can throw together to workaround physical limitations like this.
> > >
> > > > Michal Arbet
> > > > Openstack Engineer
> > > >
> > > > Ultimum Technologies a.s.
> > > > Na Poříčí 1047/26, 11000 Praha 1
> > > > Czech Republic
> > > >
> > > > +420 604 228 897
> > > > michal.arbet at ultimum.io
> > > > _https://ultimum.io_
> > > >
> > > > LinkedIn <https://www.linkedin.com/company/ultimum-technologies> |
> > > > Twitter <https://twitter.com/ultimumtech> | Facebook
> > > > <https://www.facebook.com/ultimumtechnologies/timeline>
> > > >
> > > >
> > > > st 19. 10. 2022 v 23:57 odesílatel Clark Boylan <
> cboylan at sapwetik.org> napsal:
> > > > > On Wed, Oct 19, 2022, at 9:40 AM, Michal Arbet wrote:
> > > > > > Hi,
> > > > > >
> > > > > > If I am correct this is not possible currently, but I remember I
> was
> > > > > > working on a solution, but unfortunately I stopped at some point
> > > > > > because kolla upstream didn't want to maintain.
> > > > > >
> > > > > > In attachment you can find patches for kolla and kolla-ansible
> and our idea.
> > > > > >
> > > > > > We added python script to kolla container and provide netplan
> style
> > > > > > configuration by kolla-ansible ..so openvswitch starts and
> configured
> > > > > > networking as it was set in configuration (if i remember ...it
> is quite
> > > > > > long time....and of course it was not final version ...but if i
> > > > > > remember it somehow worked).
> > > > > >
> > > > > > So, you can check it and maybe we can discuss this feature again
> :)
> > > > > >
> > > > > > Thanks,
> > > > > > Kevko
> > > > > >
> > > > > >
> > > > > > Michal Arbet
> > > > > > Openstack Engineer
> > > > > >
> > > > > > Ultimum Technologies a.s.
> > > > > > Na Poříčí 1047/26, 11000 Praha 1
> > > > > > Czech Republic
> > > > > >
> > > > > > +420 604 228 897
> > > > > > michal.arbet at ultimum.io
> > > > > > _https://ultimum.io_
> > > > > >
> > > > > > LinkedIn <https://www.linkedin.com/company/ultimum-technologies>
> |
> > > > > > Twitter <https://twitter.com/ultimumtech> | Facebook
> > > > > > <https://www.facebook.com/ultimumtechnologies/timeline>
> > > > > >
> > > > > >
> > > > > > po 17. 10. 2022 v 19:24 odesílatel Parsa Aminian
> > > > > > <p.aminian.server at gmail.com> napsal:
> > > > > > > Hello
> > > > > > > I use kolla ansible wallaby version .
> > > > > > > my compute node has only one port . is it possible to use this
> server ? as I know openstack compute need 2 port one for management and
> other for external user network . Im using provider_networks and it seems
> neutron_external_interface could not be the same as network_interface
> because openvswitch need to create br-ex bridge on separate port
> > > > > > > is there any solution that i can config my compute with 1 port
> ?
> > > > > A very long time ago the OpenStack Infra Team ran the
> "Infracloud". This OpenStack installation ran on donated hardware and the
> instances there only had a single network port as well. To workaround this
> we ended up using vlan specific subinterfaces on the node so that logically
> we were presenting more than one interface to the OpenStack installation.
> > > > >
> > > > > I don't remember all the details but the now retired
> opendev/puppet-infracloud repo may have some clues:
> https://opendev.org/opendev/puppet-infracloud/src/commit/121afc07bdd277d8ba3ba70f1433d5e6a4a4b14e
> > > > >
> > > > > > Attachments:
> > > > > > * ovs_kolla
> > > > > > * ovs_kolla_ansible
> >
>
>
>
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