----- Original Message -----
> From: "Daniel P. Berrange" <berra...@redhat.com>
> To: "Dan Kenigsberg" <dan...@redhat.com>
> Cc: vdsm-devel@lists.fedorahosted.org
> Sent: Friday, November 9, 2012 1:21:12 AM
> Subject: Re: [vdsm] [RFC] ipv6 support of vdsm
> 
> On Fri, Nov 09, 2012 at 12:59:21AM +0200, Dan Kenigsberg wrote:
> > On Thu, Nov 08, 2012 at 10:35:23PM +0100, Daniel P. Berrange wrote:
> > > On Thu, Nov 08, 2012 at 11:25:19PM +0200, Dan Kenigsberg wrote:
> > > > On Thu, Nov 08, 2012 at 06:58:09PM +0800, huntxu wrote:
> > > > > Hi, folks.
> > > > > 
> > > > > Recently I am considering to implement ipv6 support for vdsm.
> > > > > First
> > > > > of all I
> > > > > would like to know whether there is already someone working
> > > > > on this
> > > > > feature.
> > > > 
> > > > I am not aware of anyone working on ipv6 at the momemnt. You
> > > > are more
> > > > than welcome to lead the way!
> > > > 
> > > > > If so, I might do something to help, however, if not, I would
> > > > > try to
> > > > > implement
> > > > > it with suggestions from this discussion.
> > > > > 
> > > > > With ipv6 support vdsm is supposed to work properly in:
> > > > >     * mixed environment, in which ipv4 and ipv6 addresses
> > > > >     coexist
> > > > >     * ipv6-pure environment
> > > > > 
> > > > > My idea is:
> > > > > 
> > > > > 1) Provide a mechanism to setup ipv6 address configuration of
> > > > > a host via
> > > > > XMLRPC/RestAPI. This would be done in the current
> > > > > ConfigNetwork module by
> > > > > modifying the network-scripts/ifcfg-* of the devices. Thus
> > > > > the host is
> > > > > able to access ipv6 network (with correct configuration).
> > > > 
> > > > Host network configuration is an important part. We would have
> > > > to report
> > > > ipv6 addresses, too.
> > > > 
> > > > Please keep in mind, that we would like to move away from
> > > > direct ifcfg
> > > > mangaling since it's distribution-dependent, and not even the
> > > > common
> > > > practice in modern Fedoras. (sob)
> > > 
> > > I'd love to see VDSM start to make use of libvirt's network
> > > interface
> > > APIs, since we added all that support for making transaction
> > > config
> > > changes for the benefit of VDSM :-)  It of course supports IPv6
> > > configuration already, and would get you portability to Debian,
> > > Suse
> > > and soon BSD via NetCF.
> > 
> > Yeah, we are shamefully behind schedule here.. I hope Mark Wu is
> > going
> > to step up our pace (http://gerrit.ovirt.org/8618).
> > 
> > Dan, this may be a good opportunity to raise my concerns about
> > netcf's
> > ifcfg-based implementation. How is NetCF going to interoperate with
> > the
> > rise to fame of NetworkManager an systemd? If I recall correctly,
> > /etc/init.d/network, which is responsible of ifup'ing ifcfgs, is
> > not
> > even started by default on F17+. Due you have plans for a bleak
> > future
> > where ifcfg's are frowned upon?
> 
> NetworkManager is able to read / write ifcfg files in
> /etc/sysconfig/network-scripts. Historically it would
> ignore any config that referred to bridging, since it
> did not support that. As and when NM supports things
> like bridging/bonding/vlans hopefully it will also get
> the ability to understand those ifcfg files.
> 

as we heard from NetworkManager guys the bridging/bonding/vlans
should be support in rhel7, maybe already in rhel6.4

> Eventually we may well create a virInterface API driver
> in libvirt that talks to NetworkManager via DBus, replacing
> the use of netcf. This should be transparent to apps like
> VDSM that used virInterface. This is actually why you want
> to use libvirt's virInterface APIs instead of directly using
> netcf.
> 

Sounds good.

Regards,
   Igor

> Regards,
> Daniel
> --
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