openstack team mailing list archive

[Trey Morris <trey.morris@xxxxxxxxxxxxx>]

Appears my response got lost somehow. I vote for #3 as it's the most
configurable (and affects nothing contrariwise). In addition to believing we
use flags too often, I don't think having a flag solves the problem very
well. A couple of examples show why:
you want a few instances having floating IP(s) while others do not
you want multiple floating IPs for an instance

-tr3buchet

On Mon, Apr 18, 2011 at 6:15 AM, Ilya Alekseyev <ilyaalekseyev@xxxxxxx>wrote:

> Mark,
>
> approach #1 implementation is here:
> https://code.launchpad.net/~openstack-gd/nova/auto-float-ip. I saw that
> you interested in approach #3 too. May be you have some ideas of
> specification of API for approach #3?
>
> Erik,
> there is implementation of floating ips in Nova. In implementation of
> approach #1 we just care about auto assigning/deassigning. As I know
> floating ip implemented like NAT from network nodes.
>
>
> 2011/4/17 Mark Washenberger <mark.washenberger@xxxxxxxxxxxxx>
>
>> Eldar,
>>
>>
>>
>> I'm having some trouble finding the diff for your implementation of
>> approach #1. Any chance you can share it on the list?
>>
>>
>>
>> Thanks
>>
>>
>>
>> "Erik Carlin" <erik.carlin@xxxxxxxxxxxxx> said:
>>
>> > Cool. Got it. Floating IPs or what Amazon calls Elastic IPs. How are you
>> > solving the cross L2 problem?
>> >
>> > Erik
>> >
>> > Sent from my iPhone
>> >
>> > On Apr 15, 2011, at 7:28 PM, "Eldar Nugaev" <enugaev@xxxxxxxxxxxxxxxx>
>>
>> > wrote:
>> >
>> > > Hi Erik
>> > >
>> > > Thank you for response!
>> > > Yes, you are absolutely right OpenStack API already support shared IP
>> > groups.
>> > > Suppose there are some misunderstanding, because I wrote about
>> floating IPs.
>> > >
>> > > I want to have API for association IPs from floating IPs pool with
>> > > particular VM.
>> > >
>> > > At this moment we have #1 implementation as a path in our RPM repo
>> > > http://yum.griddynamics.net/. And going to make the merge proposal to
>> > > trunk.
>> > >
>> > > Also we going to create blueprint about #3 and attach branch to it.
>> > >
>> > > Eldar
>> > >
>> > > On Sat, Apr 16, 2011 at 2:34 AM, Erik Carlin
>> > <erik.carlin@xxxxxxxxxxxxx> wrote:
>> > >> Eldar -
>> > >>
>> > >> The OpenStack API already supports sharing IPs between instances
>> > (although
>> > >> this may be an extension?). What exact behavior are you after? More
>> > >> important than the way in which we expose via the API is how it's
>> > >> implemented. It's important to note that this is extremely network
>> > >> topology dependent. Sharing IPs today requires L2 adjacency so other
>> > VMs
>> > >> can GARP for the IP. L2 doesn't work at scale so you need another
>> > >> mechanism. I'm pretty sure the way AWS does it is to have a separate
>> > pool
>> > >> of IPs and inject /32 routes higher up that route towards the
>> > appropriate
>> > >> VM IP. What are your thoughts around how this would be implemented?
>> > >>
>> > >> Multiple people are working towards an independent Network as a
>> Service
>> > >> external to nova so it may make sense to plug this requirement in
>> there.
>> > >>
>> > >> Erik
>> > >>
>> > >> On 4/11/11 8:31 AM, "Eldar Nugaev" <enugaev@xxxxxxxxxxxxxxxx>
>> > wrote:
>> > >>
>> > >>> Hello everyone,
>> > >>>
>> > >>> We going to add possibility to assigning floating IP addresses in
>> > >>> OpenStack API.
>> > >>> Our goal reproduce AWS behavior when creating instance automatically
>> > >>> assigns any free floating IP or add methods to OpenStack API for
>> > >>> allocation and association API addresses.
>> > >>>
>> > >>> At this time we see three way:
>> > >>>
>> > >>> 1. FLAG --auto_assign_floating_ip (default=False)
>> > >>> 2. Optional parameter "auto_assign_floating_ip" in existing "create"
>> > >>> method
>> > >>> 3. OpenStack API add floating_ip - allocate_floating_ip,
>> > >>> associate_floating_ip
>> > >>>
>> > >>> What way is more suitable at this time?
>> > >>>
>> > >>> --
>> > >>> Eldar
>> > >>> Skype: eldar.nugaev
>> > >>>
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>> > > --
>> > > Eldar
>> > > Skype: eldar.nugaev
>> >
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