openstack team mailing list archive

[Kiall Mac Innes <kiall@xxxxxxxxxxxx>]

Response inline.

Thanks,
Kiall


On Tue, Oct 30, 2012 at 11:04 AM, Sébastien Han <han.sebastien@xxxxxxxxx>wrote:

> Hi Kial,
>
> Hold on...
> You obviously didn't understand my question. So please don't try to
> teach me anything. I can admit that the initial description of my
> request was a bit unclear. So I'm gonna try to clarify it.
>

I apologize, I certainly did not intend any insult.


>
> I use nova-network with the VLAN manager, so I have a network range
> per projects (fixed ips), per VLAN. Each project uses a specific pool,
> I use the floating IPs to expose instances to another private network
> and I don't use the "auto_assign_floating_ip" parameter.
>

Great - Sounds like a pretty standard setup.


>
> Now, when I perform a "nova floating-ip-create <my-pool>" this gives
> me the first floating IP available of that pool. What I want to
> know/achieve is to decide the floating IP address to create. Basically
> this could lead to a command like:
>
> # nova floating-ip-create <my-pool>
> <floating-ip-that-I-want-create-from-a-pool>
>

Ah - I understand now.

This is not supported by Nova Network (I can't say if it's supported with
Quantum).


>
> But as you can see below, it's not available from the CLI:
>
> # nova help floating-ip-create
> usage: nova floating-ip-create [<floating-ip-pool>]
>
> Allocate a floating IP for the current tenant.
>
> Positional arguments:
>   <floating-ip-pool>  Name of Floating IP Pool. (Optional)
>
> Then I'll associate this floating IP to one of my instances.
>
> Let's try to raise the level of this discussion. Now if there is
> something that I don't know, or something that I missed, feel free to
> teach/correct me.


Again - I apologize. No insult was intended.


> I'm looking for a workaround, or code patch.
> Something that doesn't require huge amount of work. Is that doable?
>

I believe it is doable without significant changes to the code.

By patching the code to allow an extra parameter to pass through from the
REST API call, all the way through to the DB's allocation method,
the allocation method could be made to choose a particular IP by altering
the SQL query executed.

Some pointers to the relevant parts of the code:

REST API:
https://github.com/openstack/nova/blob/stable/folsom/nova/api/openstack/compute/contrib/floating_ips.py#L162-180

Network Service API:
https://github.com/openstack/nova/blob/stable/folsom/nova/network/api.py#L177-188

Network Service Manager:
https://github.com/openstack/nova/blob/stable/folsom/nova/network/manager.py#L406-443

DB API:
*
https://github.com/openstack/nova/blob/stable/folsom/nova/db/api.py#L263-269
*

DB Implementation:
https://github.com/openstack/nova/blob/stable/folsom/nova/db/sqlalchemy/api.py#L700-718

I hope this helps!

Actually - It looked like it could be done fairly quickly, you can try this
(untested) patch: http://paste.ubuntu.com/1317723/plain/

Once applied, you should be able to supply an "ip" param as part of the
REST API call, and you will get that specific IP - if it is available. This
doesn't update the CLI, I've never looked at it's code so wouldn't know
where to start :)

Thanks,
Kiall


> Anyone?
>
> On Tue, Oct 30, 2012 at 11:03 AM, Kiall Mac Innes <kiall@xxxxxxxxxxxx>
> wrote:
> > Hi Sebastian,
> >
> > The commands are nearly identical - just replace quantum with nova!
> >
> > Although, it sounds like you already have floating IPs being allocated
> > randomly.
> >
> > That could be one of two things - either you have
> > auto_assign_floatingip=True in your configuration, or you misunderstand
> the
> > difference between fixed and floating ips.
> >
> > When you boot an instance, does it get a private or public IP? And - when
> > you ran the network-create command, what IP range did you use?
> >
> > Kiall
> >
> > On Oct 30, 2012 9:26 AM, "Sébastien Han" <han.sebastien@xxxxxxxxx>
> wrote:
> >>
> >> @Kiall, if it does, tell us more about it please.
> >>
> >>
> >> On Tue, Oct 30, 2012 at 10:19 AM, Kiall Mac Innes <kiall@xxxxxxxxxxxx>
> >> wrote:
> >> > I'm fairly confident that quantum is not a requirement for this.
> >> >
> >> > Nova's in-built networking supports exactly this since as long ago as
> I
> >> > can
> >> > remember.
> >> >
> >> > Thanks,
> >> > Kiall
> >> >
> >> > On Oct 30, 2012 9:04 AM, "Emilien Macchi" <emilien@xxxxxxxxxxxx>
> wrote:
> >> >>
> >> >> Hello Sebastien,
> >> >>
> >> >>
> >> >> What you can do today is to choose manually which floating IP you
> need
> >> >> to
> >> >> associate with a specific instance.
> >> >> You need to run OpenStack Folsom + Quantum.
> >> >>
> >> >> First, you need to create Floating IP pool(s) from Quantum CLI, and
> >> >> after
> >> >> that, the tenant is able to associate this IP to a private instance :
> >> >>
> >> >> quantum floatingip-create ext_net
> >> >>
> >> >> quantum floatingip-associate $FLOATING_ID $PORT_ID
> >> >>
> >> >> More informations about Networking configuration with Quantum CLI
> here
> >> >> :
> >> >>
> >> >>
> >> >>
> http://docs.openstack.org/trunk/openstack-network/admin/content/demo_logical_network_config.html
> >> >>
> >> >>
> >> >> Cheers ;-)
> >> >>
> >> >>
> >> >> Emilien Macchi
> >> >> ----------------------------------------------------
> >> >> // eNovance Inc.              http://enovance.com
> >> >> // ✉ emilien@xxxxxxxxxxxx     ☎ +33 (0)1 49 70 99 80
> >> >> // 10 rue de la Victoire 75009 Paris
> >> >>
> >> >> ________________________________
> >> >> De: "Sébastien Han" <han.sebastien@xxxxxxxxx>
> >> >> À: "Openstack" <openstack@xxxxxxxxxxxxxxxxxxx>
> >> >> Envoyé: Lundi 29 Octobre 2012 17:25:47
> >> >> Objet: [Openstack] Allocate specific floating IP to an instance
> >> >>
> >> >> Hi Stacker,
> >> >>
> >> >> I know OpenStack is not designed that way and I don't think it's
> >> >> possible (or maybe I misses something :)) but I was wondering if
> there
> >> >> is any simple workaround to choose a specific floating IP to
> allocate.
> >> >> In other words, don't give me a random or N+1 next floating IP
> >> >> available but let me decide which floating IP I want to assign to my
> >> >> instance. It doesn't make sense in a public cloud but it does for a
> >> >> corporate/private cloud. It would be nice to have :)
> >> >>
> >> >> Thanks in advance.
> >> >>
> >> >> Cheers!
> >> >>
> >> >> _______________________________________________
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> >> >>
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> >> >
>