Vnx-plugin-ospf

OSPF Plugin

...to be completed...

Authors:
David Fernández (david at dit.upm.es)
Miguel Ferrer (mferrer at dit.upm.es)
Francisco Jose Martin (fjmarin at dit.upm.es)
Fermín Galán (galan at dit.upm.es)
version 2.0, September 11th, 2011

Introduction

OSPF plugin is an example VNX extension plugin designed to facilitate the configuration of OSPF in virtual machines. It provides a simple XML language to express OSPF configurations which are independent of the OSPF implementation used in the virtual machine. At present, OSPF Plugin is implemented only for quagga based OSPF routers, but can be extended to support other OSPF implementations.

To use OSPF plugin in a VNX scenario, you have to add the following tag after <vm_defaults> section of <global> tag:

<extension plugin="ospf" conf="ospfd_conf.xml" />

The plugin configuration file or PCF contains the OSPF configuration written in a XML language. Using that language the configuration of a router looks like:

...
<vm name="r1" type="quagga" subtype="lib-install">
  <hostname>r1</hostname>
  <password>xxxx</password>
  <network area="0.0.0.0">10.0.0.0/16</network>
  <passive_if>eth1</passive_if> 
  <binaries>
    <zebra>/usr/lib/quagga/zebra</zebra>
    <ospfd>/usr/lib/quagga/ospfd</ospfd>
  </binaries>
</vm>
...

OSPF plugin just processes that configuration and translates it into the necessary quagga configuration files (zebra.conf and ospfd.conf) and manages the routing daemons. See the complete example below to know more about OSPF plugin capabilities.

OSPF Plugin Example Scenario

OSPF Plugin example is a simple scenario made of two routers (r1 and r2) and two hosts (h1 and h2) designed to show the capabilities of the plugin. The example is included in VNX distribution.

OSPF Plugin example scenario map
(generated using "vnx -f example_ospf-plugin.xml -v --show-map")

To start the scenario, just type:

cd /usr/share/vnx/plugins/examples
vnx -f example_ospf-plugin.xml -v -t

Scenario Specification

<?xml version="1.0" encoding="UTF-8"?>
<!--
~~~~~~~~~~~~~~~~~~~~
VNX Sample scenarios
~~~~~~~~~~~~~~~~~~~~

Name:        example_ospf-plugin
Description: Example scenario to show the use of ospf plugin. It is made of two 
             routers: r1 (ubuntu) and r2(uml) and two hosts: h1 (ubuntu) and h2 (uml).   

This file is part of the Virtual Networks over LinuX (VNX) Project distribution. 
(www: http://www.dit.upm.es/vnx - e-mail: vnx@dit.upm.es) 

Departamento de Ingenieria de Sistemas Telematicos (DIT)
Universidad Politecnica de Madrid
SPAIN
-->
<vnx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:noNamespaceSchemaLocation="/usr/share/xml/vnx/vnx-2.00.xsd">
  <global>
    <version>2.0</version>
    <scenario_name>example_ospf-plugin</scenario_name>
    <ssh_key>~/.ssh/id_dsa.pub</ssh_key>
    <automac offset="4"/>
    <!--vm_mgmt type="none" /-->
    <vm_mgmt type="private" network="10.250.0.0" mask="24" offset="16">
       <host_mapping />
    </vm_mgmt> 
    <vm_defaults>
        <console id="0" display="no"/>
	<console id="1" display="yes"/>
    </vm_defaults>
    <extension plugin="ospf" conf="example_ospf-plugin-conf.xml" />
  </global>
    
  <net name="lan1" mode="virtual_bridge" />
  <net name="lan2" mode="virtual_bridge" />
  <net name="ptp12" mode="virtual_bridge" />
  
  <!-- NODES -->
  <vm name="r1" type="libvirt" subtype="kvm" os="linux" exec_mode="cdrom">
    <filesystem type="cow">/usr/share/vnx/filesystems/rootfs_ubuntu</filesystem>
    <mem>256M</mem>
    <if id="1" net="lan1">
      <ipv4>10.0.1.1/24</ipv4>
      <ipv6>2001:db8:1::1/64</ipv6>
    </if>
    <if id="2" net="ptp12">
      <ipv4>10.0.0.1/30</ipv4>
      <ipv6>2001:db8:12::1/64</ipv6>
    </if>
    <forwarding type="ip" />
  </vm>

  <vm name="r2" type="uml" subtype="" os="" exec_mode="mconsole">
    <filesystem type="cow">/usr/share/vnx/filesystems/rootfs_uml</filesystem>
    <mem>64M</mem>
    <kernel>/usr/share/vnx/kernels/linux</kernel>
    <if id="1" net="lan2" name="fxp0">
      <ipv4>10.0.2.1/24</ipv4>
      <ipv6>2001:db8:2::1/64</ipv6>
    </if>
    <if id="2" net="ptp12" name="fxp1">
      <ipv4>10.0.0.2/30</ipv4>
      <ipv6>2001:db8:12::2/64</ipv6>
    </if>
    <forwarding type="ip" />
  </vm>

  <vm name="h1" type="libvirt" subtype="kvm" os="linux" exec_mode="cdrom">
    <filesystem type="cow">/usr/share/vnx/filesystems/rootfs_ubuntu</filesystem>
    <mem>256M</mem>
    <if id="1" net="lan1">
      <ipv4>10.0.1.2/24</ipv4>
      <ipv6>2001:db8:1::2/64</ipv6>
    </if>
    <route type="ipv4" gw="10.0.1.1">default</route>    
    <route type="ipv6" gw="2001:db8:1::1">default</route>       
  </vm>

  <vm name="h2" type="uml" exec_mode="mconsole">
    <filesystem type="cow">/usr/share/vnx/filesystems/rootfs_uml</filesystem>
    <mem>64M</mem>
    <kernel>/usr/share/vnx/kernels/linux</kernel>
    <if id="1" net="lan2">
      <ipv4>10.0.2.2/24</ipv4>
      <ipv6>2001:db8:2::2/64</ipv6>
    </if>
    <route type="ipv4" gw="10.0.2.1">default</route>    
    <route type="ipv6" gw="2001:db8:2::1">default</route>       
  </vm>
  

  <host>
    <hostif net="lan1">
       <ipv4>10.0.1.3/24</ipv4>
       <ipv6>2001:db8:1::3/64</ipv6>
    </hostif>
    <route type="ipv4" gw="10.0.1.1">10.0.0.0/16</route>    
    <route type="ipv6" gw="2001:db8:1::1">2001:db8::/32</route>    
  </host>
  
</vnx>

Plugin Configuration File (PCF)

<ospf_conf xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:noNamespaceSchemaLocation="/usr/share/xml/vnx/ospf.xsd">

   <vm name="r1" type="quagga" subtype="lib-install">
      <hostname>r1</hostname>
      <password>xxxx</password>
      <network area="0.0.0.0">10.0.0.0/16</network>
      <passive_if>eth1</passive_if> 
      <binaries>
        <zebra>/usr/lib/quagga/zebra</zebra>
        <ospfd>/usr/lib/quagga/ospfd</ospfd>
      </binaries>
   </vm>

   <vm name="r2" type="quagga" subtype="lib-install">
      <hostname>r2</hostname>
      <password>xxxx</password>
      <network area="0.0.0.0">10.0.0.0/16</network>
      <passive_if>eth1</passive_if> 
   </vm>
</ospf_conf>