If you are using VLANs, you can configure the physical switch to not forward frames with VLAN tags (that are used within openstack) out the other ports.
> -----Original Message----- > From: Satish Patel [mailto:[email protected]] > Sent: Thursday, August 25, 2016 9:31 AM > To: Eugen Block <[email protected]> > Cc: openstack <[email protected]> > Subject: Re: [Openstack] Guest VM IP configuration script > > I am planning to upgrade liberty to mitaka now so hope i will have latest and > greatest feature to solve this problem. why openstack community doesn't have > any straightforward solution. > > When i was trying to use DHCP in openstack i found openstack DHCP start > provide ip address to my existing LAN machines ( we are using flat VLAN with > neutron), that is why i disable openstack DHCP, Is it common or i am doing > something wrong? > > We have existing DHCP in out LAN i don't want openstack DHCP take over and > start assigning own IPs to Provide LAN. > > neutron subnet-create ext_net --gateway 10.35.1.254 10.35.1.0/24 -- -- > enable_dhcp=True > > On Thu, Aug 25, 2016 at 9:26 AM, Satish Patel <[email protected]> wrote: > > Eugen, > > > > I think config-drive make sense when you don't have initial network in > > place. In my case i don't care about fixed-IP for instance. I only > > need to setup network using whatever IP neutron provide in that case > > how do i query neutron port to find out what IP address is available > > or neutron going to provide so i can take that information and pass to > > userdata. Its sounds tricky any idea how to do that? > > > > On Thu, Aug 25, 2016 at 2:53 AM, Eugen Block <[email protected]> wrote: > >> Hi, > >> > >> we've been trying to learn how to feed cloud-init with ip addresses, > >> too. If DHCP is disabled in your network, the instance won't get it's > >> eth0 configured and won't be able to query the metadata server. > >> Creating a port before attaching it to a booting instance also > >> doesn't work if no dhcp is running on that network, I just tried that to > >> be sure. > >> > >> I've tried several ways but I only found one working option. For > >> external networks (or networks without dhcp) we are using > >> config-drive now. Depending on the OpenStack version it could be > >> possible that you'll need cloud-init-0.7.7, we had to fix two issues > >> ourselves in version 0.7.6 to get it working, one of them was a missing > default route. > >> > >> With enabled config-drive the instance doesn't need a configured > >> interface, it's a temporarily mounted drive from where the required > >> information is read by cloud-init. > >> You can either add the option "--config-drive true" in your nova boot > >> call or check the checkbox in Horizon. > >> > >> To answer your question about ports, you can create a new port either > >> in Horizon, but there you won't be able to assign a specific ip > >> address. If you want a specific ip address you have to call neutron > >> port-create (port-name is optional): > >> > >> neutron port-create <NETWORK-ID> --fixed-ip > >> subnet_id=<SUBNET-ID>,ip_address=<IP> --name <PORT-NAME> > >> > >> The resulting ID of that port can be used in nova boot call: > >> > >> nova boot --flavor 2 --image <IMAGE> --nic port-id=<PORT-ID> > >> <INSTANCE-NAME> > >> > >> Another way to assign a specific ip address to a booting instance > >> without port-creation (but DHCP has to be enabled) would be: > >> > >> nova boot --flavor 2 --image <IMAGE> --nic > >> net-id=<NET-ID>,v4-fixed-ip=<IP> <INSTANCE-NAME> > >> > >> for example: > >> nova boot --flavor 2 --image dc05b777-3122-4021-b7eb-8d96fdab2980 > >> --nic > >> net-id=4421e160-d675-49f2-8c29-9722aebf03b2,v4-fixed-ip=192.168.124.6 > >> test1 > >> > >> Hope this helps! > >> > >> > >> Zitat von Satish Patel <[email protected]>: > >> > >> > >>> My question is how to query ports and pass info to cloud-init? is > >>> there any document or api which i can call using script and setup > >>> network ifcfg-eth0 file > >>> > >>> On Wed, Aug 24, 2016 at 5:38 PM, Kaustubh Kelkar > >>> <[email protected]> wrote: > >>>> > >>>> You can create the ports beforehand and plug them in while creating > >>>> the instance. As for assigning IP addresses, you can query the > >>>> ports and pass the information to cloud-init. I am not sure if > >>>> there is any other way to do this. > >>>> > >>>> Even if DHCP is disabled, OpenStack assigns IP information to ports > >>>> when a VM is created, and you can see this in your dashboard. The > >>>> MAC and IP information is used to configure iptables rules within > >>>> security groups. Here is the archived thread that provides this > >>>> information: > >>>> http://lists.openstack.org/pipermail/openstack-dev/2014- > December/053069.html. > >>>> > >>>> > >>>> -Kaustubh > >>>> > >>>>> -----Original Message----- > >>>>> From: Satish Patel [mailto:[email protected]] > >>>>> Sent: Wednesday, August 24, 2016 5:05 PM > >>>>> To: James Downs <[email protected]> > >>>>> Cc: openstack <[email protected]> > >>>>> Subject: Re: [Openstack] Guest VM IP configuration script > >>>>> > >>>>> I am using neutron networking with vlan ( its provider VLAN). We > >>>>> are not using DHCP but i need some kind of hack to inject IP > >>>>> address in instance using > >>>>> cloud- > >>>>> init. > >>>>> > >>>>> We are using cloud-init but i don't know how does it work and get > >>>>> IP from neutron. I am new with neutron stuff. > >>>>> > >>>>> On Wed, Aug 24, 2016 at 4:29 PM, James Downs <[email protected]> > wrote: > >>>>> > On Wed, Aug 24, 2016 at 03:25:26PM -0400, Satish Patel wrote: > >>>>> >> I enabled following in nova.conf on compute node but didn't > >>>>> >> work :( > >>>>> >> > >>>>> >> flat_injected=true > >>>>> >> > >>>>> >> Do i need to do anything else? > >>>>> > > >>>>> > Are you using flat networking? > >>>>> > Nova-networks or Neutron? > >>>>> > > >>>>> > At this point, if you're not using DHCP, your only option is to > >>>>> > arrange to feed > >>>>> the networking information into the metadata for the VM at > >>>>> creation time, and use someting like cloud-init to configure the > >>>>> networking. The ancient networking injection stuff has either been > >>>>> removed, or been broken for years. > >>>>> > > >>>>> > Cheers, > >>>>> > -j > >>>>> > > >>>>> > _______________________________________________ > >>>>> > Mailing list: > >>>>> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >>>>> > Post to : [email protected] > >>>>> > Unsubscribe : > >>>>> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >>>>> > >>>>> _______________________________________________ > >>>>> Mailing list: > >>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >>>>> Post to : [email protected] > >>>>> Unsubscribe : > >>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >>> > >>> > >>> _______________________________________________ > >>> Mailing list: > >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >>> Post to : [email protected] > >>> Unsubscribe : > >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >> > >> > >> > >> > >> -- > >> Eugen Block voice : +49-40-559 51 75 > >> NDE Netzdesign und -entwicklung AG fax : +49-40-559 51 77 > >> Postfach 61 03 15 > >> D-22423 Hamburg e-mail : [email protected] > >> > >> Vorsitzende des Aufsichtsrates: Angelika Mozdzen > >> Sitz und Registergericht: Hamburg, HRB 90934 > >> Vorstand: Jens-U. Mozdzen > >> USt-IdNr. DE 814 013 983 > >> > >> > >> > >> _______________________________________________ > >> Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >> Post to : [email protected] > >> Unsubscribe : > >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : [email protected] Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
