说明:创建KVM模板有个好处,不用每次都运行命令创建,并且可以为迁移做准备。
一、创建KVM模板
1、下载iso(省略)
2、创建磁盘
qemu-img create -f raw centos7.raw 50G
3、编写XML
<domain type=‘kvm‘> <name>centos7</name> <uuid>354ca6f8-d70e-485b-8d0b-2ec295056e09</uuid> <memory unit=‘KiB‘>1048576</memory> <currentMemory unit=‘KiB‘>1048576</currentMemory> <vcpu placement=‘static‘>1</vcpu> <os> <type arch=‘x86_64‘ machine=‘pc-i440fx-rhel7.0.0‘>hvm</type> <boot dev=‘cdrom‘/> </os> <features> <acpi/> <apic/> </features> <cpu mode=‘custom‘ match=‘exact‘ check=‘partial‘> <model fallback=‘allow‘>Westmere</model> </cpu> <clock offset=‘utc‘> <timer name=‘rtc‘ tickpolicy=‘catchup‘/> <timer name=‘pit‘ tickpolicy=‘delay‘/> <timer name=‘hpet‘ present=‘no‘/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <pm> <suspend-to-mem enabled=‘no‘/> <suspend-to-disk enabled=‘no‘/> </pm> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type=‘file‘ device=‘disk‘> <driver name=‘qemu‘ type=‘raw‘/> <source file=‘/kvm/image/centos7.raw‘/> <target dev=‘vda‘ bus=‘virtio‘/> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x06‘ function=‘0x0‘/> </disk> <disk type=‘file‘ device=‘cdrom‘> <driver name=‘qemu‘ type=‘raw‘ cache="none" io="native"/> <source file="/kvm/iso/centos7.iso" /> <target dev=‘hda‘ bus=‘ide‘/> <readonly/> <address type=‘drive‘ controller=‘0‘ bus=‘0‘ target=‘0‘ unit=‘0‘/> </disk> <controller type=‘usb‘ index=‘0‘ model=‘ich9-ehci1‘> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x04‘ function=‘0x7‘/> </controller> <controller type=‘usb‘ index=‘0‘ model=‘ich9-uhci1‘> <master startport=‘0‘/> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x04‘ function=‘0x0‘ multifunction=‘on‘/> </controller> <controller type=‘usb‘ index=‘0‘ model=‘ich9-uhci2‘> <master startport=‘2‘/> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x04‘ function=‘0x1‘/> </controller> <controller type=‘usb‘ index=‘0‘ model=‘ich9-uhci3‘> <master startport=‘4‘/> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x04‘ function=‘0x2‘/> </controller> <controller type=‘pci‘ index=‘0‘ model=‘pci-root‘/> <controller type=‘ide‘ index=‘0‘> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x01‘ function=‘0x1‘/> </controller> <controller type=‘virtio-serial‘ index=‘0‘> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x05‘ function=‘0x0‘/> </controller> <interface type=‘bridge‘> <mac address=‘52:54:00:83:6b:d7‘/> <source bridge=‘br0‘/> <model type=‘virtio‘/> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x03‘ function=‘0x0‘/> </interface> <serial type=‘pty‘> <target type=‘isa-serial‘ port=‘0‘> <model name=‘isa-serial‘/> </target> </serial> <console type=‘pty‘> <target type=‘serial‘ port=‘0‘/> </console> <channel type=‘unix‘> <target type=‘virtio‘ name=‘org.qemu.guest_agent.0‘/> <address type=‘virtio-serial‘ controller=‘0‘ bus=‘0‘ port=‘1‘/> </channel> <input type=‘tablet‘ bus=‘usb‘> <address type=‘usb‘ bus=‘0‘ port=‘1‘/> </input> <input type=‘mouse‘ bus=‘ps2‘/> <input type=‘keyboard‘ bus=‘ps2‘/> <graphics type=‘vnc‘ port=‘5900‘ autoport=‘no‘ listen=‘0.0.0.0‘> <listen type=‘address‘ address=‘0.0.0.0‘/> </graphics> <video> <model type=‘cirrus‘ vram=‘16384‘ heads=‘1‘ primary=‘yes‘/> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x02‘ function=‘0x0‘/> </video> <memballoon model=‘virtio‘> <address type=‘pci‘ domain=‘0x0000‘ bus=‘0x00‘ slot=‘0x07‘ function=‘0x0‘/> </memballoon> </devices> </domain>
提示:上面的模板自行根据需要修改,完成后可以验证(virt-xml-validate centos7.xml)。
4、载入模板并启动
virsh define centos7.xml virsh start centos7
二、迁移KVM到另外一台机
通过上面的操作可以简单的知道迁移的步骤。
1、先迁移镜像文件
2、迁移XML文件,默认路径在(/etc/libvirt/qemu/centos7.xml),如果你采用上述xml进行KVM的配置,可以不用再默认路径上找。
3、载入模板并启动
参考:
https://libvirt.org/format.html(XML文件格式官方说明)
https://wiki.libvirt.org/page/Main_Page(官方命令行操作wiki)
原文地址:https://www.cnblogs.com/EasonJim/p/10090054.html
时间: 2024-09-29 10:32:27