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I think you have to  add interface to instance.example on ubuntu:
add

auto eth0
iface eth0 inet dhcp

to /etc/network/interface

2014-08-15 23:38 GMT+07:00 Abel Lopez <alopgeek at gmail.com>:

> Curious if you’ve defined a network space for your instances. If you’re
> using the traditional flat_network, this is known as the ‘fixed_address’
> space.
> If you’re using neutron, you would need to create a network and a subnet
> (and router with gateway, etc). You’d then assign the instance to a network
> at launch time.
>
>
> On Aug 15, 2014, at 9:17 AM, Jeff Silverman <jeff at sweetlabs.com> wrote:
>
> <ip_a.png>
> ​
> For those of you that can't see pictures:
> $ sudo ip a
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>     inet 127.0.0.1/8 scope host lo
>     inet6 ::1/128 scope host
>         valid_lft forever preferred_1ft forever
>
> I suspect that the issue is that the hypervisor is not presenting a
> virtual ethernet card.
>
> Thank you
>
>
> Jeff
>
>
>
> On Thu, Aug 14, 2014 at 6:57 PM, Nhan Cao <nhanct92 at gmail.com> wrote:
>
>> can you show output of command:
>> ip a
>>
>>
>>
>>
>> 2014-08-15 7:41 GMT+07:00 Jeff Silverman <jeff at sweetlabs.com>:
>>
>>> People,
>>>
>>> I have brought up an instance, and I can connect to it using my browser!
>>>  I am so pleased.
>>>
>>> However, my instance doesn't have an ethernet device, only a loopback
>>> device.   My management wants me to use a provider network, which I
>>> understand to mean that my instances will have IP addresses in the same
>>> space as the controller, block storage, and compute node administrative
>>> addresses.  However, I think that discussing addressing is premature until
>>> I have a working virtual ethernet card.
>>>
>>> I am reading through
>>> http://docs.openstack.org/icehouse/install-guide/install/yum/content/neutron-ml2-compute-node.html
>>> and I think that the ML2 plugin is what I need.  However, I think I do not
>>> want a network type of GRE, because that encapsulates the packets and I
>>> don't have anything to un-encapsulate them.
>>>
>>> Thank you
>>>
>>>
>>> Jeff
>>>
>>>
>>> --
>>> *Jeff Silverman*
>>> Systems Engineer
>>> (253) 459-2318 (c)
>>>
>>>
>>> _______________________________________________
>>> OpenStack-operators mailing list
>>> OpenStack-operators at lists.openstack.org
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>>>
>>>
>>
>
>
> --
> *Jeff Silverman*
> Systems Engineer
> (253) 459-2318 (c)
>
>  _______________________________________________
> OpenStack-operators mailing list
> OpenStack-operators at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>
>
>
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