Open Stack

Hi,

Thanks for the help. I am trying to run a custom Ryu app from the nova
compute node and have all the openvswitches connected to this new
controller. However, to be able to run this new app, I have to first stop
the existing neutron openvswitch agents in the same node as they run Ryu
app (integrated in Openstack) by default. Ryu in Openstack provides basic
functionalities like L2 switching but does not support launching a custom
app at the same time.
I'd like to have a single instance of Ryu controller control all the
openvswtich instances rather than having openvswitch agents in each node
managing the openvswitches separately. For this, I'll probably have to
migrate the existing functionality provided by Ryu app to this new app of
mine. Could you share some suggestions or are you aware of any previous
work done towards this, that I can read about?

Regards,
Niket

On Thu, Sep 27, 2018 at 9:21 AM Slawomir Kaplonski <skaplons at redhat.com>
wrote:

> Hi,
>
> Code of app is in
> https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/openvswitch/agent/openflow/native/ovs_ryuapp.py
> and classes for specific bridge types are in
> https://github.com/openstack/neutron/tree/master/neutron/plugins/ml2/drivers/openvswitch/agent/openflow/native
>
> > Wiadomość napisana przez Niket Agrawal <nickgrwl3 at gmail.com> w dniu
> 27.09.2018, o godz. 00:08:
> >
> > Hi,
> >
> > Thanks for your reply. Is there a way to access the code that is running
> in the app to see what is the logic implemented in the app?
> >
> > Regards,
> > Niket
> >
> > On Wed, Sep 26, 2018 at 10:31 PM Slawomir Kaplonski <skaplons at redhat.com>
> wrote:
> > Hi,
> >
> > > Wiadomość napisana przez Niket Agrawal <nickgrwl3 at gmail.com> w dniu
> 26.09.2018, o godz. 18:11:
> > >
> > > Hello,
> > >
> > > I have a question regarding the Ryu integration in Openstack. By
> default, the openvswitch bridges (br-int, br-tun and br-ex) are registered
> to a controller running on 127.0.0.1 and port 6633. The output of ovs-vsctl
> get-manager is ptcp:127.0.0.1:6640. This is noticed on the nova compute
> node. However there is a different instance of the same Ryu controller
> running on the neutron gateway as well and the three openvswitch bridges
> (br-int, br-tun and br-ex) are registered to this instance of Ryu
> controller. If I stop neutron-openvswitch agent on the nova compute node,
> the bridges there are no longer connected to the controller, but the
> bridges in the neutron gateway continue to remain connected to the
> controller. Only when I stop the neutron openvswitch agent in the neutron
> gateway as well, the bridges there get disconnected.
> > >
> > > I'm unable to find where in the Openstack code I can access this
> implementation, because I intend to make a few tweaks to this architecture
> which is present currently. Also, I'd like to know which app is the Ryu SDN
> controller running by default at the moment. I feel the information in the
> code can help me find it too.
> >
> > Ryu app is started by neutron-openvswitch-agent in:
> https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/openvswitch/agent/openflow/native/main.py#L34
> > Is it what You are looking for?
> >
> > >
> > > Regards,
> > > Niket
> > >
> __________________________________________________________________________
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> >
> > —
> > Slawek Kaplonski
> > Senior software engineer
> > Red Hat
> >
> >
> >
> __________________________________________________________________________
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> —
> Slawek Kaplonski
> Senior software engineer
> Red Hat
>
>
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