Open Stack

Hi Vivek,

On Fri, Mar 17, 2017 at 11:27 AM Vivek Nirala <nirala.vivek at gmail.com>
wrote:

> Alternatively can we use a bridge to attach the nic interfaces(of n number
> of virtual machines) ?
>

Yes, this is exactly what Neutron does by default.


> If yes then is there any specific neutron command to add a bridge and
> attach nics to it, this is required since as far as i know nova needs a
> network to spawn an instance.
>

There is no specific command at the time of creating the network or of
booting any instances.  You just need to have your Neutron configured to
use one of the drivers or plugins that uses bridging to connect VM
interfaces.


> if there is no specific neutron command to add bridge is there any plugin
> for that ( ML2 ?? )?
>

Yes.  The simplest option is the ML2 plugin with the 'linuxbridge'
mechanism driver.

Regards,
     Neil


> ..
>
> On Thu, Mar 16, 2017 at 11:21 PM, Kevin Benton <kevin at benton.pub> wrote:
>
> If it's to carry some non-ethernet traffic you will need to setup a tunnel
> between the VMs yourself with L2TP or something similar.
>
> On Thu, Mar 16, 2017 at 10:47 AM, Vivek Nirala <nirala.vivek at gmail.com>
> wrote:
>
> The connection should be like normal Ethernet wire connection, just like
> we plug an Ethernet wire between two hosts
> (Host1)nic---etherrnetwire---nic(Host2).
>
>
> On 16-Mar-2017 4:40 PM, "Kevin Benton" <kevin at benton.pub> wrote:
>
> What kind of cable? What protocol will be carried over it?
>
> Traffic between VMs on different hosts needs to be encapsulated by a
> protocol like GRE or VXLAN to carry it over the real network so that
> imposes some limitations on emulating a 'direct wire'.
>
> If you need to carry some other l2 protocol between two VMs, I suggest
> that you just establish and L2TP connection between the hypervisors.
>
> On Mar 16, 2017 03:56, "Vivek Nirala" <nirala.vivek at gmail.com> wrote:
>
> ​I want the connection between the two VMs through nics or anyother way,
> such that the connection is like direct cable connection.​
>
> On Wed, Mar 15, 2017 at 11:06 AM, Kevin Benton <kevin at benton.pub> wrote:
>
> What type of L2 communication do they need to do? If it's ethernet, then
> just attaching two ports to a network using one of the reference ML2
> drivers (i.e. OVS or LinuxBridge) will give you L2 ethernet connectivity
> via virtual switches.
>
> If you want two VMs connected via a direct connect that passes arbitrary
> frames directly without switching so you can use non-ethernet protocols,
> then I don't believe any of the plugins support a model like that.
>
> On Tue, Mar 14, 2017 at 9:46 PM, Vivek Nirala <nirala.vivek at gmail.com>
> wrote:
>
> Hi,
>
> I have installed openstack using ansible on Ubuntu 16.04 Server.
> I am able to successfully create VMs and launch instances however the
> requirement is to add one extra nic on both VMs(default is only once nic)
> so as the extra nics are connected as if they are physically connected via
> a wire i.e. L2 connectivity.
>
> Please let me know your suggestions.
>
>
> Thanks
> ​,
> Vivek​
>
>
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>
>
>
> --
> Thanks,
> *Vivek Nirala*
> Mobile:+91-9278676843 <+91%2092786%2076843>
>
>
>
>
>
> --
> Thanks,
> *Vivek Nirala*
> Mobile:+91-9278676843 <+91%2092786%2076843>
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