[Openstack] Openstack deployment on two nodes with single NIC

nithish B bestofnithish at gmail.com
Mon Jul 20 07:24:48 UTC 2015


Hi Tusa,
    Yes, 192.168.1.1 is set as both gateway IP and as the I/F IP. So,
change that, and configure your routes. This should solve it.

Thanks.

Regards,
Nitish B.

On Sun, Jul 19, 2015 at 2:03 AM, italy1 <remo at italy1.com> wrote:

> Ciao Francesco
> I think your route are not configured correctly
>
> Contattami off-line
>
> Remo
>
> Inviato da IPhone
>
>
>
> On Sat, Jul 18, 2015 at 10:27 AM -0700, "Francesco Tusa" <
> F.Tusa at westminster.ac.uk> wrote:
>
>   Hi Nitish,
>>
>> thanks for your answer.
>>
>>
>>  According to your message I should change the IP address of interface
>> qr-c15092f4 on the virtual router, to something else on the same subnet
>> (e.g. 192.168.1.100).
>>
>>
>>  Sorry I am a bit confused about this.
>>
>>
>>  192.168.1.1 is the default gw for the instances on the their private
>> network (I can see it if I type 'route -n' from within an instance). I
>> thought this was the first hop in the packet routing.
>>
>>
>>  What will happen if I change that IP? What entity will act as gateway
>> then?
>>
>>
>>  Thanks again,
>>
>> Francesco.
>>
>>
>>
>>  ------------------------------
>> *From:* nithish B <bestofnithish at gmail.com>
>> *Sent:* 18 July 2015 17:26
>> *To:* Francesco Tusa
>> *Cc:* openstack at lists.openstack.org
>> *Subject:* Re: [Openstack] Openstack deployment on two nodes with single
>> NIC
>>
>>  Hi Tusa,
>>   Looking at the post on ask.openstack.org , I see that the Ip address
>> of qr-c15092f4-bb is  192.168.1.1. Isn't that supposed to be the gateway
>> IP for that I/F? This might be the issue because I see that the command ip
>> netns exec qrouter-dff3861b-69d2-46c8-b990-0d218826955b tcpdump -n -i
>> qr-c15092f4-bb is redirecting the packets to 192.168.1.8 which is being
>> dropped as the subnet of 192.168.1.x has the gateway IP assigned as the
>> inet.
>>
>>  I guess changing this might solve the issue. Let me know if this worked.
>>
>>  Thanks.
>>
>>   Regards,
>>  Nitish B.
>>
>> On Sat, Jul 18, 2015 at 1:08 AM, Francesco Tusa <F.Tusa at westminster.ac.uk
>> > wrote:
>>
>>>  Hi all,
>>>
>>> I want to set up a small testbed for testing purposes as described in
>>> the email's subject.
>>>
>>>
>>>  I deployed Openstack on two PCs (with CentOS 7.1) in my office using
>>> RDO (openstack-packstack) last week.
>>>
>>>
>>>  Basic functionalities are working but I am having issues while
>>> accessing VMs from the physical hosts, and getting access to the external
>>> network from the VMs.
>>>
>>>
>>>  Please find below all the details, unfortunately I did not manage to
>>> solve the issue so far:
>>>
>>>
>>> https://ask.openstack.org/en/question/78232/openstack-deployment-on-two-nodes-with-one-nic/
>>>
>>>  Thanks in advance for your valuable help.
>>>
>>>
>>>  Regards,
>>>
>>> Francesco.
>>>
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>>    The University of Westminster is a charity and a company limited by
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>
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