Open Stack

Here is a heat template that I use (the indentation might be off). I have one network with DHCP enabled that connects to metadata server:

heat_template_version: 2015-04-30

parameters:
  mgmt:
    type: json
    description: ID of the mgmt network
    default: { "name": "mgmt" ,
               "id": "abcd1234" }

  no_dhcp_net:
    type: string
    default: "wxyz6789"

resources:
  server:
    type: OS::Nova::Server
    properties:
      name:test-vm
      image: ubuntu-16.04
      flavor: m1.small
      networks:
       - network: { get_param: [ mgmt, id ] }
       - port: { get_resource: server_port }
      user_data_format: RAW
      user_data:
        str_replace:
          template: |
            #!/bin/bash
            echo -e "\n" >> /etc/network/interfaces
            echo "auto ens4" >> /etc/network/interfaces
            echo "iface ens4 inet static" >> /etc/network/interfaces
            echo "address $IPADDR" >> /etc/network/interfaces
            echo "netmask 255.255.255.0" >> /etc/network/interfaces
            ifdown ens4 2>/dev/null
            ifup ens4 2>/dev/null
          params:
            $IPADDR: { get_attr: [ server_port, fixed_ips, 0, ip_address ] }

  server_port:
    type: OS::Neutron::Port
    properties:
      network_id: { get_param: no_dhcp_net }

outputs:
  dump:
    value: { get_attr: [ server, show ] }


Hope this helps.

As for config-drive, I hope the folks can shed some light.


-Kaustubh

> -----Original Message-----
> From: Satish Patel [mailto:satish.txt at gmail.com]
> Sent: Thursday, August 25, 2016 9:27 AM
> To: Eugen Block <eblock at nde.ag>
> Cc: openstack <openstack at lists.openstack.org>
> Subject: Re: [Openstack] Guest VM IP configuration script
> 
> 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 <eblock at nde.ag> 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 <satish.txt at gmail.com>:
> >
> >
> >> 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
> >> <kaustubh.kelkar at casa-systems.com> 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:satish.txt at gmail.com]
> >>>> Sent: Wednesday, August 24, 2016 5:05 PM
> >>>> To: James Downs <egon at egon.cc>
> >>>> Cc: openstack <openstack at lists.openstack.org>
> >>>> 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 <egon at egon.cc> 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     : openstack at lists.openstack.org
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> >>>>
> >>>> _______________________________________________
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> >>
> >>
> >> _______________________________________________
> >> Mailing list:
> >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
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> >
> >
> >
> >
> > --
> > 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  : eblock at nde.ag
> >
> >         Vorsitzende des Aufsichtsrates: Angelika Mozdzen
> >           Sitz und Registergericht: Hamburg, HRB 90934
> >                   Vorstand: Jens-U. Mozdzen
> >                    USt-IdNr. DE 814 013 983
> >
> >
> >
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> 
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