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Hi Arata,

we're using Opscode Chef for these problems. Each new node will
configure by chef including all interfaces and IP's. You need just
define the available network for your environment in your data bag. Free
IP's will find for checking available IP's and used IP's by node.search().

Maybe is that an other approach

Cheers
Heiko

On 16.01.2014 09:41, NOTSU Arata wrote:
> Hello,
>
> I'm trying to add a new configuration option for Neutron OVS agent.
Although I've submitted a patch and it is being reviewed [1], I'm
posting to this mailing list seeking opinion from a wider range.
>
> At present, when you deploy an environment using Neutron + OVS +
GRE/VXLAN, you have to set local_ip for tunnelling in neutron agent
config (typically ovs_neutron_plugin.ini). As each host has different
local_ip, preparing and maintaining the config files is a cumbersome work.
>
> So, I would like to introduce automatic configuration of local_ip in
Neutron. Although such a management should be done by some management
system, Neutron having this feature cloud be also helpful to the
deployment system. It would reduce the need for the systems to implement
such a feature on their own.
>
> Anyway, with this feature, instead of setting an actual IP address to
local_ip, you set some options (criteria) for choosing an IP address
suitable for local_ip among IP addresses assigned to the host. At
runtime, OVS agent will choose an IP address according to the criteria.
You will get the same effect as you set local_ip=<the IP address> by hand.
>
> The question is, what criteria is appropriate for the purpose. The
criteria being mentioned so far in the review are:
>
> 1. assigned to the interface attached to default gateway
> 2. being in the specified network (CIDR)
> 3. assigned to the specified interface
>    (1 can be considered a special case of 3)
>
> Any comment would be appreciated.
>
> Thanks,
> Arata
>
>
> [1] https://review.openstack.org/#/c/64253/
>
>
>
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