Re: [PATCH] Add forwarders attribute to <dns /> element.

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On Mon, Sep 02, 2013 at 09:27:59AM -0300, Diego Woitasen wrote:
> On Mon, Sep 2, 2013 at 8:54 AM, Daniel P. Berrange <berrange@xxxxxxxxxx> wrote:
> > On Mon, Sep 02, 2013 at 08:50:30AM -0300, Diego Woitasen wrote:
> >> Useful to set custom forwarders instead of using the contents of
> >> /etc/resolv.conf. It helps me to setup dnsmasq as local nameserver to resolv VM
> >> domain names from domain 0, when domain option is used.
> >>
> >> Signed-off-by: Diego Woitasen <diego.woitasen@xxxxxxxxxxx>
> >> ---
> >>  src/conf/network_conf.c                            | 34 +++++++++++++++++++++-
> >>  src/conf/network_conf.h                            |  1 +
> >>  src/network/bridge_driver.c                        |  8 +++++
> >>  .../nat-network-dns-forwarders.conf                | 15 ++++++++++
> >>  .../nat-network-dns-forwarders.xml                 |  9 ++++++
> >>  tests/networkxml2conftest.c                        |  1 +
> >>  6 files changed, 67 insertions(+), 1 deletion(-)
> >>  create mode 100644 tests/networkxml2confdata/nat-network-dns-forwarders.conf
> >>  create mode 100644 tests/networkxml2confdata/nat-network-dns-forwarders.xml
> >>
> >
> >
> >> @@ -1058,6 +1065,20 @@ virNetworkDNSDefParseXML(const char *networkName,
> >>          }
> >>      }
> >>
> >> +    forwarders = virXPathString("string(./@forwarders)", ctxt);
> >> +    if (forwarders) {
> >> +        def->forwarders = virStringSplit(forwarders, ",", 0);
> >
> > It is frowned upon to create XML where one attribute encodes multiple
> > separate values. For example, makes it impossible for apps to extract
> > a single value using xpath queies.
> >
> > If we need to support multiple addresses for forwarders, then this
> > suggests we need a child element underneath <dns> eg perhaps
> >
> >   <dns>
> >     <forwarder addr='8.8.8.8'/>
> >     <forwarder addr='1.2.3.4'/>
> >     <forwarder addr='234:223::4242'/>
> >   </dns>
> >
> >
> > Daniel
> > --
> > |: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
> > |: http://libvirt.org              -o-             http://virt-manager.org :|
> > |: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
> > |: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|
> 
> Ok, I'll fix it.
> 
> What do you think about the feature?

The feature proposal sounds fine to me.


Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

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