Re: [libvirt] dhcp6, radvd, ip6tables, etc. (update)
On 10/31/2012 11:53 AM, Laine Stump wrote:
That's just a safeguard to enforce the ipv4-only status of dhcp
in the
current libvirt. Just remove that restriction from the function
virNetworkDefUpdateIP() as a part of your patch adding ipv6 dhcp support.
OK, removing the ipv4 test has net-update ipv6 working as well as ipv4 does.
Observation: this is definitely a work-in-progress. I only tried
ip-dhcp-range and ip-dhcp-host. The ip-dhcp-range produced the expected
in the the xml was updated and dnsmasq was restarted. With
ip-dhcp-host, it only did the right thing if the network was down. If it
was started, nothing much happened.
A suggestion, before F18 goes with 0.10.2, I suggest that the virsh
man-page be updated. Currently, you would think that all of the stuff
worked. Clearly, it does not. At best, users will be confused. I
suggest listing the functions that are planned but not currently
implemented.
Speaking of documentation. This should be updated for DHCPv6:
http://libvirt.org/http://libvirt.org/formatnetwork.html and there is
docs/http://libvirt.org/formatnetwork.html.in in the git. However, it is
not clear what the process is for changing/updating the documentation.
Doing a grep on the log does not show a lot of commits being performed
on it.
While a lot of using IPv6/DHCP6 is straight-forward, there are a couple
of twists such as not specifying a MAC address for a v6 dhcp-host
specification.
One other thing. I am thinking about a separate patch which will
replace radvd with dnsmasq doing the work. I first need to look into
dsnamsq a bit more to understand if and how it could do the job. Given
it could, a small change for dnsmasq would eliminate the need for radvd.
I know there is some touchiness about this so I am thinking of adding a
"special xml keyword" which would switch between radvd and dnsmasq.
BTW, I am assuming this is all post v1.0.0. I have currently completed
the dhcp6 patch (net-update was the last piece) but I need to let
things work for a while to see if I missed anything. If anyone wants to
look at these patches, I can post them to this list or send them
direct. However, I want to wait until v1.0.0 gets released before
submitting them for review, etc.
Gene