[one-users] Setting up private networks for VM

[Prakhar Srivastava]

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
>>>
>>
>>
>> _______________________________________________
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>> Users at lists.opennebula.org
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>>
>>
>
>
> --
> 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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