Using UML for ORBIT Node virtualization

The goal of this web page is to provide a brief overview of how the ORBIT grid could be used to evaluate the performance of UML based virtualization.

Outline

1. Load the concerned ORBIT nodes with the image "uml_orbit.ndz" using the

omf load command.

2. Once the image is loaded, create the desired tun/tap devices using the command

tunctl

tunctl -u devname

3. Setup appropriate IP addresses for the tap interface.

4. Ensure IP forwarding is enabled on the host. This can be done by:

   host# echo 1> /proc/sys/net/ipv4/ip_forward
   

5. Also set proxy_arp by:

   host#ech0 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp
   

6. Make appropriate changes to the kernel routing table to ensure

packets can be sent to and from the interface.

7. Start the UML instance

Additional Notes

Additional information on setting up and using UML is provided here: ​http://user-mode-linux.sourceforge.net/