2011-08-19 00:14:40 +00:00
|
|
|
<domainsnapshot>
|
|
|
|
|
<name>my snap name</name>
|
|
|
|
|
<description>!@#$%^</description>
|
2011-09-22 20:29:00 +00:00
|
|
|
<state>disk-snapshot</state>
|
2011-08-19 00:14:40 +00:00
|
|
|
<parent>
|
|
|
|
|
<name>earlier_snap</name>
|
|
|
|
|
</parent>
|
|
|
|
|
<creationTime>1272917631</creationTime>
|
snapshot: new XML for external system checkpoint
Each <domainsnapshot> can now contain an optional <memory>
element that describes how the VM state was handled, similar
to disk snapshots. The new element will always appear in
output; for back-compat, an input that lacks the element will
assume 'no' or 'internal' according to the domain state.
Along with this change, it is now possible to pass <disks> in
the XML for an offline snapshot; this also needs to be wired up
in a future patch, to make it possible to choose internal vs.
external on a per-disk basis for each disk in an offline domain.
At that point, using the --disk-only flag for an offline domain
will be able to work.
For some examples below, remember that qemu supports the
following snapshot actions:
qemu-img: offline external and internal disk
savevm: online internal VM and disk
migrate: online external VM
transaction: online external disk
=====
<domainsnapshot>
<memory snapshot='no'/>
...
</domainsnapshot>
implies that there is no VM state saved (mandatory for
offline and disk-only snapshots, not possible otherwise);
using qemu-img for offline domains and transaction for online.
=====
<domainsnapshot>
<memory snapshot='internal'/>
...
</domainsnapshot>
state is saved inside one of the disks (as in qemu's 'savevm'
system checkpoint implementation). If needed in the future,
we can also add an attribute pointing out _which_ disk saved
the internal state; maybe disk='vda'.
=====
<domainsnapshot>
<memory snapshot='external' file='/path/to/state'/>
...
</domainsnapshot>
This is not wired up yet, but future patches will allow this to
control a combination of 'virsh save /path/to/state' plus disk
snapshots from the same point in time.
=====
So for 1.0.1 (and later, as needed), I plan to implement this table
of combinations, with '*' designating new code and '+' designating
existing code reached through new combinations of xml and/or the
existing DISK_ONLY flag:
domain memory disk disk-only | result
-----------------------------------------
offline omit omit any | memory=no disk=int, via qemu-img
offline no omit any |+memory=no disk=int, via qemu-img
offline omit/no no any | invalid combination (nothing to snapshot)
offline omit/no int any |+memory=no disk=int, via qemu-img
offline omit/no ext any |*memory=no disk=ext, via qemu-img
offline int/ext any any | invalid combination (no memory to save)
online omit omit off | memory=int disk=int, via savevm
online omit omit on | memory=no disk=default, via transaction
online omit no/ext off | unsupported for now
online omit no on | invalid combination (nothing to snapshot)
online omit ext on | memory=no disk=ext, via transaction
online omit int off |+memory=int disk=int, via savevm
online omit int on | unsupported for now
online no omit any |+memory=no disk=default, via transaction
online no no any | invalid combination (nothing to snapshot)
online no int any | unsupported for now
online no ext any |+memory=no disk=ext, via transaction
online int/ext any on | invalid combination (disk-only vs. memory)
online int omit off |+memory=int disk=int, via savevm
online int no/ext off | unsupported for now
online int int off |+memory=int disk=int, via savevm
online ext omit off |*memory=ext disk=default, via migrate+trans
online ext no off |+memory=ext disk=no, via migrate
online ext int off | unsupported for now
online ext ext off |*memory=ext disk=ext, via migrate+transaction
* docs/schemas/domainsnapshot.rng (memory): New RNG element.
* docs/formatsnapshot.html.in: Document it.
* src/conf/snapshot_conf.h (virDomainSnapshotDef): New fields.
* src/conf/domain_conf.c (virDomainSnapshotDefFree)
(virDomainSnapshotDefParseString, virDomainSnapshotDefFormat):
Manage new fields.
* tests/domainsnapshotxml2xmltest.c: New test.
* tests/domainsnapshotxml2xmlin/*.xml: Update existing tests.
* tests/domainsnapshotxml2xmlout/*.xml: Likewise.
2012-10-23 15:12:23 +00:00
|
|
|
<memory snapshot='no'/>
|
2011-08-18 23:33:36 +00:00
|
|
|
<disks>
|
|
|
|
|
<disk name='hda' snapshot='no'/>
|
|
|
|
|
<disk name='hdb' snapshot='no'/>
|
|
|
|
|
<disk name='hdc' snapshot='internal'/>
|
2013-11-12 13:15:51 +00:00
|
|
|
<disk name='hdd' snapshot='external' type='file'>
|
2011-08-18 23:33:36 +00:00
|
|
|
<driver type='qed'/>
|
|
|
|
|
<source file='/path/to/generated4'/>
|
|
|
|
|
</disk>
|
2013-11-12 13:15:51 +00:00
|
|
|
<disk name='hde' snapshot='external' type='file'>
|
2011-08-18 23:33:36 +00:00
|
|
|
<driver type='qcow2'/>
|
|
|
|
|
<source file='/path/to/new'/>
|
|
|
|
|
</disk>
|
2013-11-12 13:15:51 +00:00
|
|
|
<disk name='hdf' snapshot='external' type='file'>
|
2011-08-18 23:33:36 +00:00
|
|
|
<driver type='qcow2'/>
|
|
|
|
|
<source file='/path/to/generated5'/>
|
|
|
|
|
</disk>
|
|
|
|
|
</disks>
|
2011-09-22 20:29:00 +00:00
|
|
|
<domain type='qemu'>
|
|
|
|
|
<name>QEMUGuest1</name>
|
|
|
|
|
<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
|
2012-02-23 00:48:38 +00:00
|
|
|
<memory unit='KiB'>219100</memory>
|
|
|
|
|
<currentMemory unit='KiB'>219100</currentMemory>
|
2012-03-08 13:36:26 +00:00
|
|
|
<vcpu placement='static' cpuset='1-4,8-20,525'>1</vcpu>
|
2011-09-22 20:29:00 +00:00
|
|
|
<os>
|
|
|
|
|
<type arch='i686' machine='pc'>hvm</type>
|
|
|
|
|
<boot dev='hd'/>
|
|
|
|
|
</os>
|
|
|
|
|
<clock offset='utc'/>
|
|
|
|
|
<on_poweroff>destroy</on_poweroff>
|
|
|
|
|
<on_reboot>restart</on_reboot>
|
|
|
|
|
<on_crash>destroy</on_crash>
|
|
|
|
|
<devices>
|
2017-04-06 16:19:48 +00:00
|
|
|
<emulator>/usr/bin/qemu-system-i686</emulator>
|
2011-09-22 20:29:00 +00:00
|
|
|
<disk type='block' device='disk'>
|
2018-03-07 09:44:55 +00:00
|
|
|
<driver name='qemu' type='raw'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
<source dev='/dev/HostVG/QEMUGuest1'/>
|
|
|
|
|
<target dev='hda' bus='ide'/>
|
2012-02-27 10:19:54 +00:00
|
|
|
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
</disk>
|
|
|
|
|
<disk type='block' device='disk'>
|
2018-03-07 09:44:55 +00:00
|
|
|
<driver name='qemu' type='raw'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
<source dev='/dev/HostVG/QEMUGuest2'/>
|
|
|
|
|
<target dev='hdb' bus='ide'/>
|
2012-02-27 10:19:54 +00:00
|
|
|
<address type='drive' controller='0' bus='1' target='0' unit='0'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
</disk>
|
|
|
|
|
<disk type='block' device='disk'>
|
2018-03-07 09:44:55 +00:00
|
|
|
<driver name='qemu' type='raw'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
<source dev='/dev/HostVG/QEMUGuest3'/>
|
|
|
|
|
<target dev='hdc' bus='ide'/>
|
2012-02-27 10:19:54 +00:00
|
|
|
<address type='drive' controller='0' bus='2' target='0' unit='0'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
</disk>
|
|
|
|
|
<disk type='block' device='disk'>
|
2018-03-07 09:44:55 +00:00
|
|
|
<driver name='qemu' type='raw'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
<source dev='/dev/HostVG/QEMUGuest4'/>
|
|
|
|
|
<target dev='hdd' bus='ide'/>
|
2012-02-27 10:19:54 +00:00
|
|
|
<address type='drive' controller='0' bus='3' target='0' unit='0'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
</disk>
|
|
|
|
|
<disk type='block' device='disk'>
|
2018-03-07 09:44:55 +00:00
|
|
|
<driver name='qemu' type='raw'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
<source dev='/dev/HostVG/QEMUGuest5'/>
|
|
|
|
|
<target dev='hde' bus='ide'/>
|
2012-02-27 10:19:54 +00:00
|
|
|
<address type='drive' controller='0' bus='4' target='0' unit='0'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
</disk>
|
|
|
|
|
<disk type='block' device='disk'>
|
2018-03-07 09:44:55 +00:00
|
|
|
<driver name='qemu' type='raw'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
<source dev='/dev/HostVG/QEMUGuest6'/>
|
|
|
|
|
<target dev='hdf' bus='ide'/>
|
2012-02-27 10:19:54 +00:00
|
|
|
<address type='drive' controller='0' bus='5' target='0' unit='0'/>
|
2011-09-22 20:29:00 +00:00
|
|
|
</disk>
|
2016-05-14 20:36:16 +00:00
|
|
|
<controller type='usb' index='0'>
|
|
|
|
|
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
|
|
|
|
|
</controller>
|
|
|
|
|
<controller type='ide' index='0'>
|
|
|
|
|
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
|
|
|
|
|
</controller>
|
2013-04-22 12:16:13 +00:00
|
|
|
<controller type='pci' index='0' model='pci-root'/>
|
2016-01-11 11:40:32 +00:00
|
|
|
<input type='mouse' bus='ps2'/>
|
|
|
|
|
<input type='keyboard' bus='ps2'/>
|
2016-05-14 20:36:16 +00:00
|
|
|
<memballoon model='virtio'>
|
|
|
|
|
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
|
|
|
|
|
</memballoon>
|
2011-09-22 20:29:00 +00:00
|
|
|
</devices>
|
|
|
|
|
</domain>
|
2011-08-19 00:14:40 +00:00
|
|
|
<active>1</active>
|
|
|
|
|
</domainsnapshot>
|
