[openstack-dev] [Openstack][nova][Neutron] Launch VM with multiple Ethernet interfaces with I.P. of single subnet.

Kevin Benton blak111 at gmail.com
Thu Apr 17 04:39:07 UTC 2014


I was under the impression that the security group rules blocked addresses
not assigned by neutron[1].

1.
https://github.com/openstack/neutron/blob/master/neutron/agent/linux/iptables_firewall.py#L188


On Wed, Apr 16, 2014 at 9:20 PM, Aaron Rosen <aaronorosen at gmail.com> wrote:

> You can do it with ip aliasing and use one interface:
>
> ifconfig eth0 10.0.0.22/24
> ifconfig eth0:1 10.0.0.23/24
> ifconfig eth0:2 10.0.0.24/24
>
> 2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN
> qlen 1000
>     link/ether 40:6c:8f:1a:a9:31 brd ff:ff:ff:ff:ff:ff
>     inet 10.0.0.22/24 brd 10.0.0.255 scope global eth0
>        valid_lft forever preferred_lft forever
>     inet 10.0.0.23/24 brd 10.0.0.255 scope global secondary eth0:1
>        valid_lft forever preferred_lft forever
>     inet 10.0.0.24/24 brd 10.0.0.255 scope global secondary eth0:2
>        valid_lft forever preferred_lft forever
>
>
>
> On Wed, Apr 16, 2014 at 8:53 PM, Kevin Benton <blak111 at gmail.com> wrote:
>
>> Web server running multiple SSL sites that wants to be compatible with
>> clients that don't support the SNI extension. There is no way for a server
>> to get multiple IP addresses on the same interface is there?
>>
>>
>> On Wed, Apr 16, 2014 at 5:50 PM, Aaron Rosen <aaronorosen at gmail.com>wrote:
>>
>>> This is true. Several people have asked this same question over the
>>> years though I've yet to hear a use case why one really need to do this. Do
>>> you have one?
>>>
>>>
>>> On Wed, Apr 16, 2014 at 3:12 PM, Ronak Shah <ronak at nuagenetworks.net>wrote:
>>>
>>>> Hi Vikash,
>>>> Currently this is not supported. the NIC not only needs to be in
>>>> different subnet, they have to be in different network as well (container
>>>> for the subnet)
>>>>
>>>> Thanks
>>>> Ronak
>>>>
>>>> On Wed, Apr 16, 2014 at 3:51 AM, Vikash Kumar <
>>>> vikash.kumar at oneconvergence.com> wrote:
>>>>
>>>>> *With 'interfaces' I mean 'nics' of VM*.
>>>>>
>>>>>
>>>>> On Wed, Apr 16, 2014 at 4:18 PM, Vikash Kumar <
>>>>> vikash.kumar at oneconvergence.com> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>>      I want to launch one VM which will have two Ethernet interfaces
>>>>>> with IP of single subnet. Is this supported now in openstack ? Any
>>>>>> suggestion ?
>>>>>>
>>>>>>
>>>>>> Thanx
>>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
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>>
>>
>> --
>> Kevin Benton
>>
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>
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-- 
Kevin Benton
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