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 […]
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.  […]
March 16, 2011

Linux-KVM: Managing Disk Images

Disk images have long been the traditional form of storage for virtualized environments, they are essentially containers in the form of a file on the host’s file system.  These files can be either fully allocated or sparsely allocated at time of disk creation, a fully allocated 20GB disk image will take up 20GB of storage on the host file system, a sparsely allocated 20GB disk […]
March 15, 2011

KVM Guests: Manipulating Libvirt XML for Guest Creation

Today we are going to discuss using the underlying XML which libvirt uses to define a VM to either create VMs or to make simple changes.  This method has the advantage of more control over what you are creating, although it is more manual.  Now first off, when you use virt-install, virt-manager, or another tool which uses libvirt under the covers an XML file is […]
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