Open Stack

On 05/22/2015 01:39 PM, Richard Raseley wrote:
> Dmitry Makovey wrote:
>> done. Link to image attached to gist
> 
> Thank you, this helps me better understand.

first of all - thank you very much for bearing with me on this one. ;)


> Can you share what the routes on your instances look like? You'll
> obviously need to let the instance in each network how to get to the
> other networks over the 'secondary' router (assuming your addressing
> them by their RFC5735 addresses), otherwise the packets will hit the
> default gateway (the routers connected to your ext_net) and get dropped.

I think you're onto something here as out of my own ignorance I've
assumed that OpenStack/neutron will handle routing auto-magically as I
set up this kind of infrastructure:

$ for i in 123.54.67.{141,144,145} ; do ssh cloud-user@${i} netstat -nar
; done
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt
Iface
10.10.31.0      0.0.0.0         255.255.255.0   U         0 0          0
eth0
0.0.0.0         10.10.31.1      0.0.0.0         UG        0 0          0
eth0
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt
Iface
10.10.25.0      0.0.0.0         255.255.255.0   U         0 0          0
eth0
0.0.0.0         10.10.25.1      0.0.0.0         UG        0 0          0
eth0
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt
Iface
10.10.10.0      0.0.0.0         255.255.255.0   U         0 0          0
eth0
0.0.0.0         10.10.10.1      0.0.0.0         UG        0 0          0
eth0

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?

-- 
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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