今天我们实验一些libvirt虚拟机XML定义文件中的配置参数。
<domain type='kvm'> <name>XP_VM4</name> <uuid>92f1ab08-e115-4016-a522-b550ff593af8</uuid> <memory>1024000</memory> <currentMemory>1024000</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='cdrom'/> <boot dev='hd'/> <bootmenu enable='yes'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu> <topology sockets='1' cores='1' threads='1'/> </cpu> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-system-x86_64</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/opt/vm/xp_c.img' lock='exclusive'/> <target dev='hda' bus='virtio'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/opt/vm/xp_d.img' lock='exclusive'/> <target dev='hdb' bus='virtio'/> </disk> <disk type='file' device='cdrom'> <source file='/opt/vm/windows_xp_professional_sp3_x86.iso'/> <target dev='hdc'/> <readonly/> </disk> <disk type='file' device='floppy'> <source file='/opt/vm/virtio-WinXP-x86.vfd'/> <target dev='fda' bus='fdc'/> <readonly/> </disk> <interface type='bridge'> <mac address='52:54:00:7b:a8:d8'/> <!-- <source bridge='virbr0'/> --> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> </interface> <channel type='spicevmc'> <target type='virtio' name='com.redhat.spice.0'/> <alias name='virserial-channel1'/> </channel> <input type='tablet' bus='usb'/> <graphics type='spice' port='4000' autoport='no' listen='0.0.0.0'> <listen type='address' address='0.0.0.0'/> <agent_mouse mode='off'/> </graphics> <sound model='ac97'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <video> <model type='qxl' vram='65536' heads='1'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> </memballoon> </devices> <qemu:commandline> <qemu:arg value="-cpu"/> <qemu:arg value="qemu64,model=3"/> </qemu:commandline> </domain> |
1. 内存配置:
修改 <memory>1024000</memory>缺省单位是KB。 如果要将虚拟机的内存改为2G,就是<memory>2048000</memory> |
2. CPU配置:
修改 <vcpu>1</vcpu>和 <cpu><topology sockets='1' cores='1' threads='1'/></cpu> 如果要改成4个VCPU,可以这样:<vcpu>4</vcpu>和 <cpu><topology sockets='1' cores='2' threads='2'/></cpu> |
3. 时间同步配置:
修改 <clock offset='localtime'/> Localtime:表示虚拟机从本地主机同步时间: 如果要从外部时间服务器同步UTC时间,则改为: <clock offset=’utc’/> |
4. 启动问题:
<boot dev='cdrom'/> <boot dev='hd'/> ————光驱位第一启动项,硬盘其次 <bootmenu enable='yes'/> ————有启动菜单选项,F12可以选择启动顺序 |
5. 电源控制:
<acpi/> ————虚拟机接收电源控制信号,可以用libvirt的shutdown命令优雅的关闭虚拟机操作系统 |
6. 虚拟机行为控制:
<on_poweroff>destroy</on_poweroff> ——虚机操作系统关机后释放资源 <on_reboot>restart</on_reboot> ——虚机操作系统要求重启后libvirt重启虚拟机 <on_crash>restart</on_crash> ——虚机操作系统崩溃后重启虚拟机 |
7. 鼠标模式
<input type='tablet' bus='usb'/> ——光标的绝对移动 <input type=’mouse’ bus='ps2'/> ——光标的相对移动
实际使用效果 tablet较好
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未完待续…