Open Source Software and Linux:



March 24, 2009  12:19 AM

Open Virtualization Format (OVF) released

Posted by: Xjlittle
dtmf, open virtualization format, vmware, xen

The Distributed Management Task Force (DMTF) released the finished version of the Open Virtualization Format (OVF). The OVF is a set of metadata tags that can be used to deploy virtual environment across multiple virtualization platforms. Using OVF users can download a virtualized application...

January 6, 2009  8:33 PM

Installing Openfiler NAS as a Xen virtual host

Posted by: Xjlittle
centos, NAS, openfiler, red hat, rpath, virtual machine, xen

If you've ever tried to install the Openfiler NAS frontend as a Xen virtual host you probably found that 1) it was not as straightforward as it would seem, 2)getting the right combination of information that is on the web correct in the openfiler config file is difficult and 3)documentation at the...

December 13, 2008  10:59 PM

Adding the iptables firewall to the Xen domU (part 2)

Posted by: Xjlittle
centos, dom0, domU, Firewalls, iptables, Linux, pciback, red hat, xen

In my last column we set up a physical NIC in our Xen domU to expose it to the internet and setup our iptables firewall. At this point you should have 2 interfaces in your domU. One should be facing the internet and have an IP Address assigned from your ISP. The other should be a typical Xen...

December 12, 2008  7:56 PM

Setting up a physical NIC for a firewall on a Xen domU (Part 1)

Posted by: Xjlittle
centos, dom0, domU, domU firewall, pciback, red hat, Virtualization, xen, xen firewall

Recently I brought up a new Xen server that needed an iptables firewall on a domU. My first thought had been to setup the firewall on dom0 but that turned out to be a difficult task because of all of the virtual interfaces that are created. Red Hat/Centos also installs a set of rules by default...

November 17, 2008  6:32 PM

Setting up your firewall on domU with iptables

Posted by: Xjlittle
centos 5, dom0, domU, domU firewall, Firewalls, iptables, pciback, xen

As discussed in an earlier post you must first hide your NIC from dom0 to set up your iptables firewall on your domU. After you have successfully hidden the NIC from dom0 then we can proceed to our domU firewall setup. You must first decide which domU that you are going to use for a firewall. ...

November 11, 2008  2:59 AM

CentOS 5 and pciback aka hiding pci card from Xen DOM0

Posted by: Xjlittle
dom0, domU, pciback. pciback.hide, xen, xen pciback. centos xen

I just recently spent more hours than I care to think about getting a NIC in Xen Dom0 hidden and passed to a DomU via pciback in CentOS 5. Lesson number 1: pciback or pciback.hide is now a module. Putting it on GRUB's kernel line is no longer sufficient. Lesson number 2: If you NIC module...

October 3, 2008  11:10 AM

The lines between Open Source and Microsoft are starting to blur

Posted by: Xjlittle
citrix, open source, vmware, xen

This all started with the Novell-SuSE Linux and Microsoft deal a few years ago. Now, with Open Source virtualization coming on strong with many of the major players jumping on board, the lines are beginning to...


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