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

George Paraskevas paraskgeor at gmail.com
Sat Oct 31 08:50:14 UTC 2015

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.

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( 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
> 5) Added it to the router- router2 as interface with a IP -
> 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
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> OpenStack-operators at lists.openstack.org
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