Vnx-tutorial-dynamips

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VNX Tutorial Ubuntu

(Work in progress....)


Description

VNX includes several example scenarios based on the VNUML tutorial scenario but including all types of virtual machines supported by VNX (see tutorial_*.xml files in /usr/share/vnx/examples directory).

The scenario presented here is made of 4 Ubuntu virtual machines (h1, h2, h3 and h4) and 2 dynamips virtual routers (r1 and r2) connected through three virtual networks. The host participates in the scenario having a network interface in Net3. All hosts use an Ubuntu server root filesystem.

Figure 1: tutorial_ubuntu-dynamips scenario topology

Starting the scenario

Start the scenario with: 

cd /usr/share/vnx/examples/
sudo vnx -f tutorial_ubuntu-dynamips.xml -v --create

You will see the six virtual machine textual consoles opening.

If you close a host or router console, you can reopen it with: 

sudo vnx -f tutorial_ubuntu-dynamips.xml -v --console con1 -M <vmname>

being <vmname> the name of the virtual machine.

You can also open the consoles manually with the commands shown at the end of vnx execution: 

----------------------------------------------------------------------------------
 Scenario "tutorial-r1_all" started

 VM_NAME     | TYPE                | CONSOLE ACCESS COMMAND
-----------------------------------------------------------------------------------------
 h1          | libvirt-kvm-linux   | con0:  'virt-viewer -c qemu:///system h1' or 'vncviewer :0'
             |                     | con1:  'virsh -c qemu:///system console h1' or 'screen /dev/pts/4'
-----------------------------------------------------------------------------------------
 h2          | libvirt-kvm-linux   | con0:  'virt-viewer -c qemu:///system h2' or 'vncviewer :1'
             |                     | con1:  'virsh -c qemu:///system console h2' or 'screen /dev/pts/6'
-----------------------------------------------------------------------------------------
 r1          | dynamips-3600       | con1:  'telnet localhost 12000'
-----------------------------------------------------------------------------------------
 r2          | dynamips-3600       | con1:  'telnet localhost 12002'
-----------------------------------------------------------------------------------------
 h3          | libvirt-kvm-linux   | con0:  'virt-viewer -c qemu:///system h3' or 'vncviewer :2'
             |                     | con1:  'virsh -c qemu:///system console h3' or 'screen /dev/pts/10'
-----------------------------------------------------------------------------------------
 h4          | libvirt-kvm-linux   | con0:  'virt-viewer -c qemu:///system h4' or 'vncviewer :3'
             |                     | con1:  'virsh -c qemu:///system console h4' or 'screen /dev/pts/12'
-----------------------------------------------------------------------------------------

You can show the previous table at any time with: 

sudo vnx -f tutorial_ubuntu-dynamips.xml -v --console-info

See VNX Console Management for more details.

Executing commands

Stopping the scenario

To stop the scenario preserving the changes made inside virtual machines (it only works for ubuntu VMs, not for dynamips) you have to use the "-d" or "--shutdown" option: 

sudo vnx -f tutorial_ubuntu-dynamips.xml -v --shutdown

You can later restart the scenario with: 

sudo vnx -f tutorial_ubuntu-dynamips.xml -v --create

To stop the scenario discarding all the changes made in the virtual machine use the "-P" or "--destroy" option: 

sudo vnx -f tutorial_ubuntu-dynamips.xml -v --destroy

Other interesting options

You can restart the virtual machines individually with: 

sudo vnx -f tutorial_ubuntu-dynamips.xml -v --shutdown -M h1
sudo vnx -f tutorial_ubuntu-dynamips.xml -v --create -M h1

You can suspend and restore a virtual machine with: 

sudo vnx -f tutorial_ubuntu-gui.xml -v --suspend -M h1
sudo vnx -f tutorial_ubuntu-gui.xml -v --resume -M h1

You can see a graphical map of the virtual scenario using the --show-map option: 

sudo vnx -f tutorial_ubuntu-dynamips.xml -v --show-map
Figure 1: tutorial_ubuntu-dynamips scenario topology

tutorial_ubuntu-dynamips.xml scenario

<?xml version="1.0" encoding="UTF-8"?>

<!--
VNUML Root Scenario (1)
See the tutorial/index.html document for details
-->

<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>tutorial-r1_all</scenario_name>
    <automac/>
    <vm_mgmt type="none"/>
    <!--vm_mgmt type="private" network="10.250.0.0" mask="24">
       <host_mapping />
    </vm_mgmt--> 
    <vm_defaults>
    	<console id="0" display="no"/>
	    <console id="1" display="yes"/>
    </vm_defaults>
    <dynamips_ext>tutorial_ubuntu-dynamips-dn.xml</dynamips_ext>
  </global>

  <net name="Net0" mode="virtual_bridge" />
  <net name="Net1" type='ppp' mode="virtual_bridge" />
  <net name="Net2" mode="virtual_bridge" />
  <net name="Net3" mode="virtual_bridge" />

  <vm name="h1" type="libvirt" subtype="kvm" os="linux">
    <filesystem type="cow">/usr/share/vnx/filesystems/rootfs_ubuntu</filesystem>
    <mem>128M</mem>
    <if id="1" net="Net0">
      <ipv4>10.0.0.1/24</ipv4>
    </if>
    <route type="ipv4" gw="10.0.0.3">default</route>
  </vm>

  <vm name="h2" type="libvirt" subtype="kvm" os="linux">
    <filesystem type="cow">/usr/share/vnx/filesystems/rootfs_ubuntu</filesystem>
    <mem>128M</mem>
    <if id="1" net="Net0">
      <ipv4>10.0.0.2/24</ipv4>
    </if>
    <route type="ipv4" gw="10.0.0.3">default</route>
  </vm>

  <vm name="r1" type="dynamips" subtype="3600" os="">
    <filesystem type="cow">/usr/share/vnx/filesystems/c3640</filesystem>
    <mem>96M</mem>
    <if id="1" net="Net0" name="e0/0">
      <ipv4>10.0.0.3/24</ipv4>
    </if>
    <if id="2" net="Net1" name="s1/0">
      <ipv4>10.0.1.1/24</ipv4>
    </if>
    <if id="3" net="Net3" name="e0/1">
      <ipv4>10.0.3.1/24</ipv4>
    </if>
    <route type="ipv4" gw="10.0.1.2">10.0.2.0/24</route>
    <exec seq="brief" type="verbatim">show ip interface brief</exec>
  </vm>

  <vm name="r2" type="dynamips" subtype="3600" os="">
    <filesystem type="cow">/usr/share/vnx/filesystems/c3640</filesystem>
    <mem>96M</mem>
    <if id="1" net="Net1" name="s1/0">
      <ipv4>10.0.1.2/24</ipv4>
    </if>
    <if id="2" net="Net2" name="e0/0">
      <ipv4>10.0.2.1/24</ipv4>
    </if>
    <route type="ipv4" gw="10.0.1.1">default</route>
    <exec seq="brief" type="verbatim">show ip interface brief</exec>
  </vm>

  <vm name="h3" type="libvirt" subtype="kvm" os="linux">
    <filesystem type="cow">/usr/share/vnx/filesystems/rootfs_ubuntu</filesystem>
   <mem>128M</mem>
   <if id="1" net="Net2">
      <ipv4>10.0.2.2/24</ipv4>
    </if>
    <route type="ipv4" gw="10.0.2.1">default</route>
  </vm>
  
  <vm name="h4" type="libvirt" subtype="kvm" os="linux">
    <filesystem type="cow">/usr/share/vnx/filesystems/rootfs_ubuntu</filesystem>
    <mem>128M</mem>
    <if id="1" net="Net2">
      <ipv4>10.0.2.3/24</ipv4>
    </if>
    <route type="ipv4" gw="10.0.2.1">default</route>    
  </vm>
  
  <host>
    <hostif net="Net3">
       <ipv4>10.0.3.2/24</ipv4>
    </hostif>
    <route type="ipv4" gw="10.0.3.1">10.0.0.0/16</route>
  </host>

</vnx>
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