[Openstack-operators] Need help with adding instance with fixed ip in external network with out using private and floating ip.

Geo Varghese gvarghese at aqorn.com
Sat Oct 31 13:46:23 UTC 2015


Hi George,

Thanks for trying that method. For me, thats not worked.

On Sat, Oct 31, 2015 at 7:13 PM, George Paraskevas <paraskgeor at gmail.com>
wrote:

> Hello again,
> that's great! As for the method you mentioned i haven't tried it but i
> will just to see what happens.
>
> Thanks again
> George
>
> On 31 October 2015 at 15:29, Geo Varghese <gvarghese at aqorn.com> wrote:
>
>> Hi George,
>>
>> I just tried your method and it seems working perfectly :)
>>
>> Thanks for your valuable inputs.
>>
>> On Sat, Oct 31, 2015 at 6:42 PM, Geo Varghese <gvarghese at aqorn.com>
>> wrote:
>>
>>> Hi George,
>>>
>>> Thanks for the update. Yes, you are right that is the exact requirement.
>>>
>>> "assign ip from that network directly to the instance with out the use
>>> of a private net and floating ip over nat"
>>>
>>> I got a update about external network like this from list. Thats why i
>>> tried it like that.
>>>
>>> ==========================================================
>>>  A Neutron router can also be attached to the same network so that
>>> instances in non-routable tenant networks can obtain floating IPs from the
>>> same 'public' network. At one time non-admin users were not allowed to
>>> attach VMs to 'external' networks but I believe that restriction was
>>> removed around Kilo or so.
>>>
>>> Yes, as long as the network is marked as both 'shared' and external, a
>>> tenant can attach VMs and router gateway interfaces directly to it.
>>> ==========================================================
>>>
>>> According to your inputs, the above method is not correct right?
>>>
>>>
>>> And about the method of adding bridge to compute node, do we need to add
>>> following options?
>>>
>>> bridgemapping in ml2 conf
>>> enable_distributed_routing to true
>>>
>>> Thanks again for your time.
>>>
>>>
>>> On Sat, Oct 31, 2015 at 2:20 PM, George Paraskevas <paraskgeor at gmail.com
>>> > wrote:
>>>
>>>> Hello there,
>>>>
>>>> From what I understand you want to assign ip from that network directly
>>>> to the instance with out the use of a private net and floating ip over nat.
>>>> Now you need to correct some things and you will be quite there. First when
>>>> you create an external network then that network can only work though
>>>> floating ip. So instead create the same net but don't mark it as external.
>>>> Also you need that bridge on compute nodes because the VM nic will bind
>>>> directly to it. So don't configure l3 agent just configure ml mapping for
>>>> that network. I hope you can under stand and I also hope I understood you.
>>>> Thanks
>>>> George
>>>>
>>>> On Sat, 31 Oct 2015, 08:43 Geo Varghese <gvarghese at aqorn.com> wrote:
>>>>
>>>>> Hi Team,
>>>>>
>>>>> I need help with adding instance with fixed ip in external network
>>>>> with out using private and floating ip.
>>>>>
>>>>> I have tested it using following steps
>>>>>
>>>>> 1) Created a new nic - eth4 for new external network(192.168.122.0/24)
>>>>> in controller.
>>>>>
>>>>> 2) Created a bridge - br-ex2 and added eth4 as port to bridge.
>>>>>
>>>>> 3) Mapped this bridge in ml2 conf and restarted l3 agent and neutron
>>>>> plugin
>>>>>
>>>>> 4) Then added shared external network Ext2 in openstack. Then added
>>>>> subnet as  192.168.122.0/24
>>>>>
>>>>> 5) Added it to the router- router2 as interface with a IP -
>>>>> 192.168.122.99. Network topology shows the interface is active with this
>>>>> IP. Ping to this ip is also working from other machines.
>>>>>
>>>>> Later created VM in this network, but it failed with following error
>>>>> in nova-compute log.
>>>>>
>>>>> =========================================================
>>>>> Unable to mount image
>>>>> /var/lib/nova/instances/903a6630-941c-4fd0-948f-85522fa20979/disk with
>>>>> error libguestfs installed but not usable (/usr/bin/supermin-helper exited
>>>>> with error status 1.
>>>>> ==========================================================
>>>>>
>>>>> Please check attached screen shot of network topology.
>>>>>
>>>>> Please help me with your inputs.
>>>>>
>>>>> --
>>>>> --
>>>>> Regards,
>>>>> Geo Varghese
>>>>> _______________________________________________
>>>>> OpenStack-operators mailing list
>>>>> OpenStack-operators at lists.openstack.org
>>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>>>>>
>>>>
>>>
>>>
>>> --
>>> --
>>> Regards,
>>> Geo Varghese
>>>
>>
>>
>>
>> --
>> --
>> Regards,
>> Geo Varghese
>>
>
>


-- 
--
Regards,
Geo Varghese
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