October 27, 2014

Linux KVM: Bridging a Bond on CentOS 6.5

Today we are going to hop back into the KVM fray, and take a  look at using CentOS as a hypervisor., and configuring very resilient network connections to support our guests.  Of course these instructions should be valid on Red Hat Linux and Oracle Linux as well, though there is a little more to be done around getting access to the repos on those distributions… […]
October 24, 2012

Linux KVM: Ubuntu 12.10 with Openvswitch

Today I am revisiting my previous post on Openvswitch on Ubuntu 12.04.  Things have changed since then.  Previously Openvswitch was relatively new and as such the userland tools (with libvirt being the one I use) didn’t support it yet, so while you could have used Openvswitch by executing the kvm processes for each VM manually.  Since this was a predictable problem the Openvswitch guys created […]
June 11, 2012

Linux-KVM: Using KVM on Oracle Linux 6

In my new role I am using Oracle Linux more and more, so as an exercise I have been replicating my builds on Oracle Linux.  Here we are going to use Oracle Linux 6.2 x86_64 as a KVM hypervisor.  Keep in mind that KVM is not Oracle’s preferred hypervisor, however it is supported, but if you plan on taking advantage of the reduced software licensing […]
March 26, 2012

Linux-KVM: Ubuntu 12.04 with Openvswitch

UPDATE: October 29, 2012 This article doesn’t work on Ubuntu 12.10, to use Ubuntu 12.10 please refer to my new article here. Openvswitch is a better way of managing your virtual networking stacks for KVM and Xen.  This can be used instead of the bridge-utils package, and has the ability to use VLANs, LACP, QoS, sFlow, and others.  In this article we will be using […]
March 14, 2012

KVM Guests: Windows NT… What?

OK so you have been kicking around an old NT machine for years, neigh, a decade.  So what do you do with it?  Realistically the machine has already sustained numerous failures, and it won’t make it through another one.  We have all fought this battle.  I personally fought this battle many years ago and frankly P2V is never clean when coming from NT.  But if […]
February 6, 2012

KVM Guests: Graceful Shutdown

So a fairly trivial (but critical) aspect of using KVM is of course performing graceful shutdowns of your domains, without having to reach inside of the guest to perform the shutdown.  Now when it comes to turning off your guests you have two ways of proceeding (with virsh)… Which is a HARD power off of your guest.  This is the same as pulling the power […]
November 7, 2011

Linux-KVM: Converting Raw Disk Images to LVM Logical Volumes Redux

This really is an update to my previous article “Linux-KVM: Converting Raw Disk Images to LVM Logical Volumes“, but the process is significantly different and thus requires more explaining than a simple inline update would do it justice.  Now the big flaw with my first article was that by using dd on the hypervisor level, we are opening ourselves up to unintentional data loss due […]
August 16, 2011

Linux-KVM Management: Live Migration Without Shared Storage

Everyday I learn something new about Linux-KVM, this is why I love this platform.  Today we are going to talk about Live Migration.  The kicker?  Shared storage not required.  Now please keep in mind that just because shared storage is not required, doesn’t mean there is not a benefit to it.  Shared storage will accelerate this process, since the data will not have to move.  […]
August 8, 2011

Linux-KVM Management: Offline Migration

When you compare Linux-KVM to Hyper-V or VMWare your initial results will indicate that Linux-KVM is lacking when it comes to management tools, and basic functionality.  You would be correct, however you would also be incorrect.  You see with Linux-KVM we can leverage the underlying power of the Linux userland, and with this frankly all things are possible.  Here is one of the basic bits […]
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