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Kernel 2.6.18-164.11.1.el5xen on xen.gz-3.4.1 needs dom0_mem

My server runs CentOs 5.x, and uses the Gitco repo to provide later versions of Xen. I’ve previously sorted out the issues (at least in earlier Xen and CentOS versions) around bridging guest vifs to a bonded interface (I replaced Xen entwork scripts with stock CentOS ones, which needed patching to bring bonds up [...]

Xen vs KVM – horses for courses?

As anyone who’s read any of my previous posts will know, I’ve been considering Red Hat’s adoption of KVM over Xen and wondering if a move to KVM is the right thing to do.

I think “The right thing” depends a fair bit on where you are, and what your requirements are. Obvious? Perhaps, but [...]

Updating BIOS on an Intel board without Windows

I have swapped out a Q8200 processor for a Q8400 processor in my home server, so I can play with KVM. This means a BIOS update to give me the enable/disable option for Intel Virtualization [sic] Technology. Now I’ve updated many a BIOS in my time, so it didn’t even occur to me that it might be anything other than trivial. How wrong I [...]

USB CentOS to the rescue!

I stupidly broke a host and managed to recover it with CentOS Live CD running from a USB stick, which was refreshingly easy to [...]

LVM saves the day, possibly…

Using LVM for Xen guests virtual disks might have made KVM migration easier than I first [...]

In theory – migrating from Xen to KVM under CentOS 5.3

I’m advance planning my migration of live services from Xen VMs to KVM VMs on the same physical box, with as little downtime as [...]