[Dnsmasq-discuss] [PATCH] DHCPv6: Honor assigning IPv6 address based on MAC address

Harald Jensås hjensas at redhat.com
Thu Nov 28 12:36:48 GMT 2019


On Sun, 2019-11-24 at 10:35 +0100, Geert Stappers wrote:
> On Thu, Nov 21, 2019 at 03:12:00PM +0100, Harald Jensås wrote:
> > Bumping this patch again: 
> > http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2018q4/012707.html
> > 
> > I see there have been several request to include this on the list:
> > http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2019q1/012895.html (and others
> > ...)
> > afaict there has not been any objections to the patch.
> > 
> > 
> > We are trying to make Openstack Ironic deploy baremetal servers in
> > a
> > setup where Openstack Neutron is used. Neutron uses dnsmasq and the
> > MAC
> > address as identifier to assign IPv6 addresses in a static only
> > setup,
> > config details at bottom of this mail.
> > 
> > The problem with DUID/IAID changes as the baremetal node is moving
> > trough the deployment phases UEFI->iPXE->Deploy Ramdisk resulting
> > in
> > "no address available" has always been a blocker for this to work.
> > (The
> > issue was discussed on this list a some time ago, 
> > http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2017q1/thread.html#11267
> > )
> > 
> > This patch solves this problem of changing DUID/IAID's.
> > 
> >  Is there a reason not to merge the patch?
> 
> A better question would be:
> 
>   What is needed to get this, reported as working, patch merged?
> 

Thanks Geert, this is indeed the better question.

I can provide dnsmasq log's and traffic captures along with
configuration details from a setup I have where I verified this is
working if that helps.

On other words, let us know what is needed and we shall try to provide
it.


> 
> > 
> > 
> > /usr/sbin/dnsmasq \
> >  -k \
> >  --no-hosts \
> >  --no-resolv \
> >  --pid-file=/var/lib/neutron/dhcp/6c9c3845-a101-47fa-a491-
> > 52e1ecb11e65/pid \
> >  --dhcp-hostsfile=/var/lib/neutron/dhcp/6c9c3845-a101-47fa-a491-
> > 52e1ecb11e65/host \
> >  --addn-hosts=/var/lib/neutron/dhcp/6c9c3845-a101-47fa-a491-
> > 52e1ecb11e65/addn_hosts \
> >  --dhcp-optsfile=/var/lib/neutron/dhcp/6c9c3845-a101-47fa-a491-
> > 52e1ecb11e65/opts \
> >  --dhcp-leasefile=/var/lib/neutron/dhcp/6c9c3845-a101-47fa-a491-
> > 52e1ecb11e65/leases \
> >  --dhcp-match=set:ipxe,175 \
> >  --dhcp-userclass=set:ipxe6,iPXE \
> >  --local-service \
> >  --bind-dynamic \
> >  --dhcp-range=set:subnet-2b009f45-e0e2-4888-bb19-
> > 8d46e51717b8,fd12:3456:789a:1::,static,64,86400s \
> >  --dhcp-option-force=option:mtu,1450 \
> >  --dhcp-lease-max=16777216 \
> >  --conf-file= \
> >  --domain=localdomain
> > 
> > $ cat /var/lib/neutron/dhcp/6c9c3845-a101-47fa-a491-
> > 52e1ecb11e65/host
> > fa:16:3e:8b:07:9f,host-fd12-3456-789a-1
> > --4.localdomain,[fd12:3456:789a:1::4]
> > fa:16:3e:9f:b7:e3,host-fd12-3456-789a-1
> > --ed.localdomain,[fd12:3456:789a:1::ed]
> > 
> > 
> 
> Groeten
> Geert Stappers




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