[one-users] Setting up private networks for VM

[Jaime Melis]

Hi Prakhar,

you need to use the same bridge, both for public and private networks: eth0.

regards,
Jaime

On Wed, Apr 6, 2011 at 9:18 PM, Prakhar Srivastava <prakhar.apj at gmail.com>wrote:

> Hi,
> Thannx for the reply.
> Using two NIC sections per VM (one has eth0 bridge and the other one has
> eth1 as bridge) But I have a single bridge created on each of my cluster
> nodes i.e. eth0. When I insert NIC for private network which has bridge as
> "eth1", I get a error that eth1 bridge does not exist and the deployment
> fails.eth0 acts as a bridge between my public network and the network
> interfaces of VMs. This works fine.
>
> I want that a second NIC can be added to the VMs but it fails because of
> the reason mentioned above.(there is no eth1 bidge).
>
> Regards,
> Prakhar
>
>
> On Wed, Apr 6, 2011 at 9:18 PM, Jaime Melis <jmelis at opennebula.org> wrote:
>
>> Hi Prakhar,
>>
>> The scenario you've described is very easily achievable, you only need to
>> create another private network vnet instance (created with the onevnet
>> utility) and add two NIC sections per VM, one for the public NIC and one for
>> the private one.
>>
>> It has one drawback, though, if you do this you will not be able to use
>> the ebtables hook for network isolation, therefore someone using one of your
>> VMs might be able to do MAC spoofing. But other than that it should work
>> perfectly.
>>
>> cheers,
>> Jaime
>>
>> On Mon, Apr 4, 2011 at 12:24 PM, Prakhar Srivastava <
>> prakhar.apj at gmail.com> wrote:
>>
>>> Hi,
>>> By private networks, I mean the virtual network created by opennebula
>>> onevnet utility. Consider the scenario where I have 4 VMs running in my
>>> opennebula cloud setup. All of them has  a public IP (allocated from a
>>> virtual network created by using onevnet utility) thats accessible from my
>>> network(LAN) . Its easy enough to access because it falls under the same
>>> network in which I am. What if I want to attach another interface to the
>>> VMs, so that I can assign private IPs to them .This is handy if you want to
>>> have more VMs than the number of public IPs available to you. Hope this
>>> makes sense.
>>> My question i do I need to have another physical NIC on all my cluster
>>> nodes for this.If not, please suggest a solution.
>>>
>>> Regards,
>>> Prakhar
>>>
>>> On Mon, Apr 4, 2011 at 11:33 AM, Prakhar Srivastava <
>>> prakhar.apj at gmail.com> wrote:
>>>
>>>> Hi,
>>>> I wanted to set up private networks for VMs in my opennebula setup. Is
>>>> it necessary to have two physical NICs on the cluster nodes for setting
>>>> private networks. If yes, is there any alternative to it so that I can use
>>>> my VMs using their private IPs.
>>>>
>>>> Regards,
>>>> Prakhar
>>>>
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.opennebula.org
>>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>
>>>
>>
>>
>> --
>> Jaime Melis, Cloud Technology Engineer/Researcher
>> Major Contributor
>> OpenNebula - The Open Source Toolkit for Cloud Computing
>> www.OpenNebula.org | jmelis at opennebula.org
>>
>
>


-- 
Jaime Melis, Cloud Technology Engineer/Researcher
Major Contributor
OpenNebula - The Open Source Toolkit for Cloud Computing
www.OpenNebula.org | jmelis at opennebula.org
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