Life with KVM: Networking

Date: 20 October 2008

I spent a couple of days a while back trying to figure out why I was seeing bizarre bridge and network errors in my KVM host’s syslog and a VM that only two of three NICs worked at a time. Turns out that there is a very simple fix for both problems. First, let’s start with the KVM host network configuration. Here’s the basic config for a host with two NICs.
One of my criteria for choosing a virtualization platform is that it had to run Windows and Linux guests. Linux, of course, works out of the box on most VM hosts. Windows is a whole other story. The good news is that Windows Server 2003 and Server 2008 work just fine on KVM. There are, however, a few weird things that I’ve noticed so I thought I’d share some of them with you today.

Life with KVM: Live Migration

Date: 20 September 2008

Categories: kvm, virtualization

I thought I would take a few minutes and share some of my experiences with Linux KVM. In this first post, I’d like to share some things about live migration. First, live migration works great … if you have the right version of KVM. Kvm-69, which is included with Ubuntu Hardy, is broken. Starting with kvm-70, live migration works again and works very well. You hardly even notice at all if you’re logged into the machine remotely while it migrates.

Virtualization From the Trenches

Date: 07 September 2008

We’re in the process of trying to virtualize our data center at work. I was given the task of testing and evaluating the various VM technologies. I have to say that I am not impressed. VMWare ESX Let’s start with the big player in the VM world, VMWare ESX. The Banner team uses ESX for a few of their servers. ESX stood head and shoulders over everything else that I looked at.