- 1 Virtualization
- 1.1 Enterprise Management Tools List
- 1.2 Fedora Xen List
- 1.3 Libvirt List
In this section, we cover discussion on the @et-mgmnt-tools-list, @fedora-xen-list, @libvirt-list and @ovirt-devel-list of Fedora virtualization technologies.
Contributing Writer: Dale Bewley
Enterprise Management Tools List
This section contains the discussion happening on the et-mgmt-tools list
New Release virt-manager 0.7.0
Virtual Machine Manager provides a graphical tool for administering virtual
QEmu. Start, stop, add or remove virtual devices,
connect to a graphical or serial console, and see resource usage statistics
for existing VMs on local or remote machines. Uses
as the backend
- Redesigned 'New Virtual Machine' wizard (Jeremy Perry, Tim Allen, Cole Robinson)
- Option to remove storage when deleting a virtual machine.
- File browser for libvirt storage pools and volumes, for use when attaching storage to a new or existing guest.
- Physical device assignment (PCI, USB) for existing virtual machines.
- Bug fixes and minor improvements.
New Release virtinst 0.4.3
virtinst is a module that helps build and install
libvirt based virtual
machines. It currently supports
Xen virtual machines. Package
includes several command line utilities, including
and install new VMs) and
virt-clone (clone an existing virtual machine).
This is largely a bug fix release.
Fedora Xen List
This section contains the discussion happening on the fedora-xen list.
dom0 Kernel: Better, Still Not Ready
Michael explained, "The current plan is to wait until basic
dom0 support makes it into the vanilla
kernel, which should happen for 2.6.30, and then decide if
dom0 can be enabled and if the patches for full
dom0 support can safely be added without affecting ordinary operation."
"At the moment there are still things that are broken such as
X support in some cases, and there are also Fedora patches that have been omitted because they were tricky to merge, so it is too early to start adding
dom0 support to official Fedora kernels."
Missing Hypervisor Capabilities Restored
This section contains the discussion happening on the libvir-list.
Snapshot Support Discussed
In an attempt to make it easier to backup
KVM windows guests,
virsh function. "Modelled on the
virDomainSave function it takes
an optional script which it will execute (and pass the name of the
domain as an argument) while the domain is paused, then resume the
domain." Within this script, a backup of the guest domain could be created.
The patch was seen as too ad-hoc, and not accepted as-is.
"I think this can help administrators in a controlled situation,
but I'm hoping a real snapshotting API will be possible at some point
goes though the list of storage resources used by the
domain and properly make a snapshot using a storage API or return
an error if that's not possible."
Daniel P. Berrange
what he would like to see.
"In terms of API I think I'd like to see
snapshotting available as part
of a more generic save/restore API. I tend to think of the current API
as providing 'unmanaged save/restore'". Libvirt does not track saved images,
so does not know if a snapshot is available to be started at the restart of
"Thus I think the first step towards a general snapshot facility would
be to provide an API for 'managed save/restore' where we explicitly
track saved images."
"With this, you could configure
libvirtd, so that when starting up, it"
would "see if the guest was suspended before
the previous host shutdown, and if so, then restore from that saved
image automatically. Or make it skip autostart completely, if any save
images exist, and allow an admin defined initscript to do auto restore
from the save image."
Memory Ballooning Support for QEMU
libvirt QEMU driver to fully support memory ballooning.
"Memory ballooning allows you to have your guest dynamically change it’s memory usage by evicting unused memory during runtime. This is a useful feature because it reduces the impact your guest can have on memory usage of your host by giving up unused memory back to the host."