kvm的快照功能 (二、基于libvirt的快照)

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实例二利用libvirt使用快照【virsh # snapshot-create domain-name】

一、创建虚机快照，名字自动生成，可在开机、关机、suspend等各种状态下做

virsh # snapshot-create test

Domain snapshot 1352883319 created
virsh # snapshot-list test
Name Creation Time State
------------------------------------------------------------
1352881807 2012-11-14 16:30:07 +0800 running
1352882069 2012-11-14 16:34:29 +0800 running
1352882555 2012-11-14 16:42:35 +0800 running
1352883319 2012-11-14 16:55:19 +0800 shutoff

virsh # snapshot-list test
Name Creation Time State
------------------------------------------------------------
1352881807 2012-11-14 16:30:07 +0800 running
1352882069 2012-11-14 16:34:29 +0800 running
1352882555 2012-11-14 16:42:35 +0800 running
1352883319 2012-11-14 16:55:19 +0800 shutoff

virsh # snapshot-create test
Domain snapshot 1352883337 created
virsh # snapshot-list test
Name Creation Time State
------------------------------------------------------------
1352881807 2012-11-14 16:30:07 +0800 running
1352882069 2012-11-14 16:34:29 +0800 running
1352882555 2012-11-14 16:42:35 +0800 running
1352883319 2012-11-14 16:55:19 +0800 shutoff
1352883337 2012-11-14 16:55:37 +0800 paused
virsh #

二、查看最新的快照信息
[root@nc1 boss]# virsh snapshot-current testsnp
<domainsnapshot>
    <name>1315385065</name>
    <description>Snapshot of OS install and updates</description>
    <state>running</state>
    <creationTime>1315385065</creationTime>
    <domain>
      <uuid>afbe5fb7-5533-d154-09b6-33c869a05adf</uuid>
    </domain>
   </domainsnapshot>

三、使用快照，指定使用哪一个快照恢复虚拟机
[root@nc1 boss]# virsh snapshot-revert test snapshot02

四、删除指定快照
[root@nc1 boss]# virsh snapshot-delete test snapshot02
Domain snapshot snapshot02 deleted

附：
Snapshot (help keyword 'snapshot')
    snapshot-create                Create a snapshot from XML
    snapshot-create-as             Create a snapshot from a set of args
    snapshot-current               Get the current snapshot
    snapshot-delete                Delete a domain snapshot
    snapshot-dumpxml               Dump XML for a domain snapshot
    snapshot-list                  List snapshots for a domain
    snapshot-revert                Revert a domain to a snapshot

更多详细内容可查看 http://libvirt.org/formatsnapshot.html#SnapshotAttributes