|
|
| |
VIRT-CLONE(1) |
Virtualization Support |
VIRT-CLONE(1) |
virt-clone - clone existing virtual machine images
virt-clone is a command line tool for cloning existing virtual machine
images using the libvirt hypervisor management library. It will copy
the disk images of any existing virtual machine, and define a new guest with
an identical virtual hardware configuration. Elements which require uniqueness
will be updated to avoid a clash between old and new guests.
By default, virt-clone will show an error if the necessary
information to clone the guest is not provided. The --auto-clone option will
generate all needed input, aside from the source guest to clone.
Please note, virt-clone does not change anything _inside_ the
guest OS, it only duplicates disks and does host side changes. So things
like changing passwords, changing static IP address, etc are outside the
scope of this tool. For these types of changes, please see
virt-sysprep.
Most options are not required. Minimum requirements are --original or
--original-xml (to specify the guest to clone), --name, and appropriate
storage options via -file.
- --connect URI
- Connect to a non-default hypervisor. See virt-install(1) for details
- -o, --original ORIGINAL_GUEST
- Name of the original guest to be cloned. This guest must be shut off.
- --original-xml ORIGINAL_XML
- Libvirt guest xml file to use as the original guest. The guest does not
need to be defined on the libvirt connection. This takes the place of the
--original parameter.
- --auto-clone
- Generate a new guest name, and paths for new storage.
An example of possible generated output:
Original name : MyVM
Generated clone name : MyVM-clone
Original disk path : /home/user/foobar.img
Generated disk path : /home/user/foobar-clone.img
If generated names collide with existing VMs or storage, a number
is appended, such as foobar-clone-1.img, or MyVM-clone-3.
- -n, --name NAME
- Name of the new guest virtual machine instance. This must be unique
amongst all guests known to the hypervisor connection, including those not
currently active.
- -u, --uuid UUID
- UUID for the guest; if none is given a random UUID will be generated. If
you specify UUID, you should use a 32-digit hexadecimal number. UUID are
intended to be unique across the entire data center, and indeed world.
Bear this in mind if manually specifying a UUID
- -f, --file PATH
- Path to the file, disk partition, or logical volume to use as the backing
store for the new guest's virtual disk. If the original guest has multiple
disks, this parameter must be repeated multiple times, once per disk in
the original virtual machine.
- --nvram NVRAMFILE
- Optional path to the new nvram VARS file, if no path is specified and the
guest has nvram the new nvram path will be auto-generated. If the guest
doesn't have nvram this option will be ignored.
- --force-copy TARGET
- Force cloning the passed disk target ('hdc', 'sda', etc.). By default,
virt-clone will skip certain disks, such as those marked 'readonly'
or 'shareable'.
- --skip-copy TARGET
- Skip cloning the passed disk target ('hdc', 'sda', etc.). By default,
virt-clone will clone certain disk images, typically read/write
devices. Use this to skip copying of a specific device, so the new VM uses
the same storage path as the original VM.
- --nonsparse
- Fully allocate the new storage if the path being cloned is a sparse file.
See virt-install(1) for more details on sparse vs. nonsparse.
- --preserve-data
- No storage is cloned: disk images specific by --file are preserved as is,
and referenced in the new clone XML. This is useful if you want to clone a
VM XML template, but not the storage contents.
- --reflink
- When --reflink is specified, perform a lightweight copy. This is much
faster if source images and destination images are all on the same btrfs
filesystem. If COW copy is not possible, then virt-clone fails.
- -m, --mac MAC
- Fixed MAC address for the guest; If this parameter is omitted, or the
value RANDOM is specified a suitable address will be randomly
generated. Addresses are applied sequentially to the networks as they are
listed in the original guest XML.
- --print-xml
- Print the generated clone XML and exit without cloning.
- --replace
- Shutdown and remove any existing guest with the passed --name
before cloning the original guest.
- -h, --help
- Show the help message and exit
- --version
- Show program's version number and exit
- --check
- Enable or disable some validation checks. See virt-install(1) for more
details.
- -q, --quiet
- Suppress non-error output.
- -d, --debug
- Print debugging information to the terminal when running the install
process. The debugging information is also stored in
~/.cache/virt-manager/virt-clone.log even if this parameter is
omitted.
Clone the guest called demo on the default connection, auto generating a
new name and disk clone path.
# virt-clone \
--original demo \
--auto-clone
Clone the guest called demo which has a single disk to
copy
# virt-clone \
--original demo \
--name newdemo \
--file /var/lib/xen/images/newdemo.img
Clone a QEMU guest with multiple disks
# virt-clone \
--connect qemu:///system \
--original demo \
--name newdemo \
--file /var/lib/xen/images/newdemo.img \
--file /var/lib/xen/images/newdata.img
Clone a guest to a physical device which is at least as big as the
original guests disks. If the destination device is bigger, the new guest
can do a filesystem resize when it boots.
# virt-clone \
--connect qemu:///system \
--original demo \
--name newdemo \
--file /dev/HostVG/DemoVM \
--mac 52:54:00:34:11:54
Please see https://virt-manager.org/bugs
Copyright (C) Fujitsu Limited, Copyright (C) Red Hat, Inc, and various
contributors. This is free software. You may redistribute copies of it under
the terms of the GNU General Public License
https://www.gnu.org/licenses/gpl.html. There is NO WARRANTY, to the
extent permitted by law.
virt-sysprep(1), virsh(1), virt-install(1),
virt-manager(1), the project website https://virt-manager.org
Visit the GSP FreeBSD Man Page Interface. Output converted with ManDoc. |