虚拟机和云主机的区别

import libvirt

conn = libvirt.open('qemu:///system')
if conn == None:
    print('Failed to open connection to qemu:///system')
    exit(1)

xml_desc = """
<domain type='kvm'>
  <name>example-vm</name>
  <memory unit='KiB'>1048576</memory>
  <vcpu placement='static'>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-2.9'>hvm</type>
    <boot dev='hd'/>
  </os>
  <devices>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/example.qcow2'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <interface type='network'>
      <mac address='52:54:00:73:3a:ef'/>
      <source network='default'/>
      <model type='virtio'/>
    </interface>
  </devices>
</domain>
"""

dom = conn.createXML(xml_desc, 0)
if dom == None:
    print('Failed to create domain')
    exit(1)

print('Domain created successfully')
dom.destroy()
conn.close()