从镜像文件开出虚拟机

需求

利用qcow2格式的镜像文件，创建出虚拟机
虚拟机要求，4G内存，2核，外带200G磁盘
创建完，将磁盘挂载

步骤

1、 定义xml文件

创建虚拟机目录，复制镜像

 # mkdir  -p  /storage/instance/vm01 # cp /data0/centos6.6.qcow2 /storage/instance/vm01/

创建外挂磁盘文件

# qemu-img create  -f  qcow2  disk.qcow2  200G# qemu-img info disk.qcow2     image: disk.qcow2    file format: qcow2    virtual size: 200G (214748364800 bytes)    disk size: 136K    cluster_size: 65536

定义xml文件

# vi vm01.xml

<domain type='kvm'>    <name>vm01</name>    <memory>4096000</memory>    <currentMemory>4096000</currentMemory>    <vcpu>2</vcpu>   <os>      <type arch='x86_64' machine='pc'>hvm</type>      <boot dev='hd'/>    </os>   <features>     <acpi/>     <apic/>     <pae/>   </features>   <clock offset='localtime'/>   <on_poweroff>destroy</on_poweroff>   <on_reboot>restart</on_reboot>   <on_crash>destroy</on_crash>   <devices>     <emulator>/usr/libexec/qemu-kvm</emulator>     <disk type='file' device='disk'>      <driver name='qemu' type='qcow2'/>       <source file='/storage/instance/vm01/centos6.6.qcow2'/>       <target dev='hda' bus='ide'/>     </disk>     <disk type='file' device='disk'>      <driver name='qemu' type='qcow2'/>       <source file='/storage/instance/vm01/disk.qcow2'/>       <target dev='hdb' bus='ide'/>     </disk>     <disk type='file' device='cdrom'>       <source file='/iso/CentOS-6.6-x86_64-bin-DVD1.iso'/>       <target dev='hdc' bus='ide'/>       </disk>     <interface type='bridge'>      <source bridge='br0'/>     </interface>    <input type='mouse' bus='ps2'/>     <graphics type='vnc' port='-1' autoport='yes' listen = '0.0.0.0' keymap='en-us'/>   </devices> </domain>

2、 创建虚拟机

# virsh define /storage/instance/vm01/vm01.xml # virsh list --all     Id    名称                         状态---------------------------------------------------- -     vm01                           关闭 #  virsh start vm01 #  virsh vncdisplay vm01192.168.10.233:0

通过vnc连接虚拟机即可

3、初始化磁盘并挂载