RH442 - 如何通过lvm快照克隆一个kvm虚拟机

系统版本[root@desktop2 ~]# cat /proc/version Linux version 2.6.32-220.el6.x86_64 (mockbuild@x86-004.build.bos.redhat.com) (gcc version 4.4.5 20110214 (Red Hat 4.4.5-6) (GCC) ) #1 SMP Wed Nov 9 08:03:13 ES

t0nsha

3385人浏览 · 2013-01-17 00:43:21

t0nsha · 2013-01-17 00:43:21 发布

系统版本

[root@desktop2 ~]# cat /proc/version
Linux version 2.6.32-220.el6.x86_64 (mockbuild@x86-004.build.bos.redhat.com) (gcc version 4.4.5 20110214 (Red Hat 4.4.5-6) (GCC) ) #1 SMP Wed Nov 9 08:03:13 EST 2011
[root@desktop2 ~]#

为虚拟机创建快照

[root@desktop2 ~]# lvs
LV           VG   Attr   LSize   Origin Snap% Move Log Copy% Convert
home         vol0 -wi-ao 512.00m
root         vol0 -wi-ao   8.00g
vserver      vol0 owi-a- 10.00g
vserver-snap vol0 swi-a-   4.00g vserver   0.89
[root@desktop2 ~]# lvcreate -L 1G -s -n vserver2 /dev/vol0/vserver
Logical volume "vserver2" created
[root@desktop2 ~]# lvs
LV           VG   Attr   LSize   Origin Snap% Move Log Copy% Convert
home         vol0 -wi-ao 512.00m
root         vol0 -wi-ao   8.00g
vserver      vol0 owi-a- 10.00g
vserver-snap vol0 swi-a-   4.00g vserver   0.89
vserver2     vol0 swi-a-   1.00g vserver   0.00

生成新的uuid

[root@desktop2 ~]# uuidgen
1440f78a-3f93-4a84-be09-bef93c3188e3

导出vserver虚拟机的配置信息，并修改4处客户化信息

[root@desktop2 ~]# virsh dumpxml vserver > /tmp/vserver2.xml
[root@desktop2 ~]# vim /tmp/vserver2.xml


<domain type='kvm'>
<name>vserver2</name>
<uuid>1440f78a-3f93-4a84-be09-bef93c3188e3</uuid>
<memory>2097152</memory>
<currentMemory>1048576</currentMemory>
<vcpu>2</vcpu>
<os>
    <type arch='x86_64' machine='rhel6.2.0'>hvm</type>
    <boot dev='hd'/>
</os>
<features>
    <acpi/>
    <apic/>
    <pae/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='block' device='disk'>
      <driver name='qemu' type='raw' cache='none' io='native'/>
      <source dev='/dev/vol0/vserver2'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <interface type='bridge'>
      <mac address='52:54:00:00:00:02'/>
      <source bridge='br0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <input type='tablet' bus='usb'/>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes'/>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
</devices>
</domain>
[root@desktop2 ~]#

生成克隆虚拟机

[root@desktop2 ~]# virsh define /tmp/vserver2.xml
Domain vserver2 defined from /tmp/vserver2.xml

启动克隆虚拟机
[root@desktop2 ~]# virsh start vserver2
Domain vserver2 started

[root@desktop2 ~]# virsh list
Id Name State
----------------------------------
3 vserver2 running