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My pleasure :)

Just one more info, I tried to update the subnet static routes, and the new
routes are assigned after "service network restart" on the VMs. I guess
because they are sent via DHCP.

I updated the subnet via Horizon, but you sure can do it with "neutron
subnet-update".

Kind regards,
---------------------------------------------------------------
Cynthia Lopes do Sacramento
Ingénieur DevOps Cloud SDN
Maya Technologies - Bull/Atos

2015-05-26 20:20 GMT+02:00 Dmitry Makovey <dmitry at athabascau.ca>:

> On 05/26/2015 02:52 AM, Cynthia Lopes wrote:
> > Hi,
> >
> > Just one thing that my be helpful... You don't have to add theses routes
> > manually in each VM, you can have neutron do that for you.
> >
> > It is possible to configure the subnet to inject static routes on the
> VMs...
> >
> > When you create the subnet, you can pass the addres of the subnet you
> want
> > to reach as "destination", and the IP of the router as "nexthop":
> >
> > # neutron subnet-create  --host-route destination=CIDR,nexthop=IP_ADDR
> >
> > Additional route (This option can be repeated if you need multiple
> routes)
> >
> > Then, all the VMs created on the subnet will be injected with the
> route(s)
> > you specified.
> >
> >
> >
> > You might be able to update the subnet to add theses routes, but I never
> > tried it by updating...
>
> Brilliant. I'll give it a go in a couple of days, when I return back to
> that project. This sounds like a great solution. Even if it means
> redefining networks - long term it's worth it IMO. Thank you very much.
>
> >
> >
> > Kind regards,
> > ---------------------------------------------------------------
> > Cynthia Lopes do Sacramento
> > Ingénieur DevOps Cloud SDN
> > Maya Technologies - Bull/Atos
> >
> > 2015-05-22 22:07 GMT+02:00 Richard Raseley <richard at raseley.com>:
> >
> >> Dmitry Makovey wrote:
> >>
> >>> first of all - thank you very much for bearing with me on this one.;)
> >>>
> >>
> >> My pleasure, happy to help!
> >>
> >>  So how shall I go about setting it up? do I need to spin up some
> >>> "dual-nic" VM that would act as a router or can I use some other
> >>> OpenStack facilities for that?
> >>>
> >>
> >> You won't need a dual NIC VM, but rather to just add a route on each VM
> >> that tells it that, for hosts which have addresses in the other
> network(s),
> >> to not use the default gateway (which is the ext_net attached router),
> but
> >> to send their traffic via the other ('private') router's interface.
> >>
> >> So, for example on the instance which you have attached to the
> >> 'private_gb_db_net' network you would have two routes:
> >>
> >> * ip route add -net 10.10.31.0 netmask 255.255.255.0 gw 10.10.10.4
> >>
> >> * ip route add -net 10.10.25.0 netmask 255.255.255.0 gw 10.10.10.6
> >>
> >> As of now, the default gateway is the only route they know of, so while
> it
> >> is true that the Neutron routers themselves have automatic knowledge of
> >> their attached networks, that is separate from the instance's knowledge
> of
> >> which routers are available.
> >>
> >> I hope that helps.
> >>
> >>
> >> Regards,
> >>
> >> Richard
> >>
> >>
> >> _______________________________________________
> >> Mailing list:
> >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> >> Post to     : openstack at lists.openstack.org
> >> Unsubscribe :
> >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> >>
> >
>
>
> --
> Dmitry Makovey
> Web Systems Administrator
> Athabasca University
> (780) 675-6245
> ---
> Confidence is what you have before you understand the problem
>     Woody Allen
>
> When in trouble when in doubt run in circles scream and shout
>      http://www.wordwizard.com/phpbb3/viewtopic.php?f=16&t=19330
>
>
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