Linux KVM Virtualization Manual Low-Level Guest Export/Import Procedure: Difference between revisions
Jump to navigation
Jump to search
Line 31: | Line 31: | ||
===Snapshot Each Storage Device=== | ===Snapshot Each Storage Device=== | ||
qemu-img snapshot -c | qemu-img snapshot -c <snapshot-tag> <volume-name> | ||
For more details about snapshot mechanics, see {{Internal|Qemu-img#Take_a_Snapshot|qemu-img snapshot -c}} | |||
=Restore from Snapshot= | =Restore from Snapshot= |
Revision as of 17:55, 4 July 2017
Internal
Overview
This is the procedure to snapshot a KVM virtual machine. It consists in taking snapshots of its XML definition and performing snapshots of all its storage devices.
Create a Snapshot Image
If the virtual machine has more than one storage device attached, they all must be snapshot at the same time to produce a consistent snapshot that can be reverted to.
Procedure
Shutdown the Target Guest
virsh shutdown <vm-name>
Identify all Storage Devices
virsh dumpxml <vm-name>
Look for <disk> definitions. The disk definition specifies the source and the format of the virtual storage device. Example:
<disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/main-storage-pool/appproxy.qcow2'/> ... </disk>
Snapshot Each Storage Device
qemu-img snapshot -c <snapshot-tag> <volume-name>
For more details about snapshot mechanics, see
Restore from Snapshot
Alternative
Alternative suing qemu-img create. See