14.5.23. 创建虚拟机 XML 转储(配置文件)
使用 virsh 输出客户机虚拟机的 XML 配置文件:
# virsh dumpxml {guest-id, guestname or uuid}
此命令将 guest 虚拟机的 XML 配置文件输出到标准输出(stdout)。您可以通过将输出传送到文件来保存数据。将输出传送至名为 guest.xml 的文件的示例:
# virsh dumpxml GuestID > guest.xml
此文件的
guest.xml
可以重新创建客户端虚拟机(请参阅 第 14.6 节 “编辑客户机虚拟机的配置文件” )。您可以编辑此 XML 配置文件来配置附加设备或部署额外的客户端虚拟机。
virsh dumpxml 输出的示例:
# virsh dumpxml guest1-rhel6-64 <domain type='kvm'> <name>guest1-rhel6-64</name> <uuid>b8d7388a-bbf2-db3a-e962-b97ca6e514bd</uuid> <memory>2097152</memory> <currentMemory>2097152</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='file' device='disk'> <driver name='qemu' type='raw' cache='none' io='threads'/> <source file='/home/guest-images/guest1-rhel6-64.img'/> <target dev='vda' bus='virtio'/> <shareable/< <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <interface type='bridge'> <mac address='52:54:00:b9:35:a9'/> <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'/> <sound model='ich6'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <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='0x06' function='0x0'/> </memballoon> </devices> </domain>
请注意,设置了 <shareable/> 标志。这表示在域间应该共享该设备(假设管理程序和操作系统支持),这意味着应该为该设备取消激活缓存。