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1、同宿主机克隆

被克隆的虚拟机先关机，然后命令克隆：

[root@localhost centos]# virt-clone -o vm1 -n centos74-01 -f /data1/kvm/centos/centos74-01.img
WARNING  Setting the graphics device port to autoport, in order to avoid conflicting.
Allocating 'centos74-01.img'                                                                                      |  40 GB  00:00:03

Clone 'centos74-01' created successfully.

修改vnc端口：[root@localhost kvm]# virsh edit centos74-01

    <graphics type='vnc' port='5914' autoport='no' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>

启动虚拟机：

[root@localhost data1]# virsh list
Id    Name                          State
----------------------------------------------------

[root@localhost data1]# virsh start centos74-01
Domain centos74-01 started

[root@localhost data1]# virsh list
Id    Name                          State
----------------------------------------------------
6    centos74-01                    running

[root@localhost data1]#

2、异宿主机克隆或迁移

异宿主机克隆、迁移，操作之前最好也先把虚拟机关机。三个步骤：

• 1、拷贝模板虚拟机
• 2、 dumpxml并修改 xml配置
• 3、去定义虚拟机。

步骤一：拷贝模板虚拟机 拷贝克隆，一般用于异宿主机。直接把宿主机的虚拟机关机，然后整个文件夹拷贝过去。

<domain type='kvm'>
    <name>vm1</name>
    <memory>2194304</memory>
    <currentMemory>2194304</currentMemory>
    <vcpu>2</vcpu>
    <os>
        <type arch='x86_64' machine='pc'>hvm</type>
        <boot dev='hd'/>    //硬盘启动
        <boot dev='cdrom'/>    //光盘启动
        <boot dev='network'/>    //网络启动
    </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='file' device='disk'>
            <driver name='qemu' type='qcow2' cache='none'/>
            <source file='/data/kvm/vm1/vm1-01.qcow2'/> //目的镜像路径
            <target dev='vda' bus='virtio'/>
        </disk>
        <disk type='file' device='disk'>
            <driver name='qemu' type='qcow2' cache='none'/>
            <source file='/data/kvm/vm1/vm1-02.qcow2'/> //目的镜像路径
            <target dev='vdb' bus='virtio'/>
        </disk>
        <interface type='bridge'>
            <source bridge='br0' />
            <model type='virtio' />
        </interface>
        <interface type='bridge'>
            <source bridge='br1' />
            <model type='virtio' />
        </interface>
        <input type='tablet' bus='usb'/>
        <input type='mouse' bus='ps2'/>
        <serial type='pty'>
            <target port='0'/>
        </serial>
        <console type='pty'>
            <target type='serial' port='0'/>
        </console>
        <graphics type='vnc' port='5917'  listen = '0.0.0.0'  passwd='12345678'  keymap='en-us'/>
    </devices>
</domain>

步骤三：去定义虚拟机。

virsh define vm1.xml  # 定义虚拟机
virsh start vm1  # 启动虚拟机

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