kvm(三)客户机vm的克隆功能
一、开启客户端vm的console功能二、虚拟机的克隆两种方式
1、开启客户端vm的console功能
2、
1.1、echo "ttyS0" >> /etc/securetty#添加ttyS0的许可,允许root登录
1.2、在/etc/grub.conf中加入如下内容console=ttyS0
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default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Red Hat Enterprise Linux (2.6.32-431.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-431.el6.x86_64 ro root=/dev/mapper/VolGroup-lv_root nomodeset rd_NO_LUKS rd_NO_MD rd_LVM_LV=VolGroup/lv_swap crashkernel=auto LANG=zh_CN.UTF-8 rd_LVM_LV=VolGroup/lv_rootKEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet console=ttyS0
initrd /initramfs-2.6.32-431.el6.x86_64.img
1.3、在/etc/inittab中加入
S0:12345:respawn:/sbin/agetty ttyS0 115200
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# cat /etc/inittab|grep -v ^#
id:3:initdefault:
S0:12345:respawn:/sbin/agetty ttyS0 115200
重启客户端;
reboot即可
1.4、验证:
在宿主机 virsh console vm2
二、虚拟机克隆
2.1、经过命令化克隆虚拟机
1>、首先关闭源vm
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# virsh shutdown vm2
2>、命令化克隆vm
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# virt-clone -o vm2 -n vm3 -f /kvm/vm3.img
-o 表示要克隆的源vm
-n 表示目标vm的名称
-f 表示目标vm所使用的disk
3>、启动目标vm 并 修改vm的配置
vm所要修改的大概有几点
1、修改hosts
2、修改主机名
3、修改网卡配置,ip、uuid、vnc端口等,不然会报错
4、6.0以上系统第一次开机最好要删除文件 (/etc/udev/rules.d/70-persistent-net.rules) 然后重启
2.2、经过copy配置文件和磁盘文件方式克隆虚拟机
1>、导出源vm的配置文件并编辑
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# virsh dumpxml vm2 > /etc/libvirt/qemu/vm4.xml
# cat /etc/libvirt/qemu/vm4.xml
<domain type='kvm'>
<name>vm4</name>
<uuid>4e7de5d2-fab4-958f-1aba-2da41690fd07</uuid>
<memory unit='KiB'>524288</memory>
<currentMemory unit='KiB'>524288</currentMemory>
<vcpu placement='static'>1</vcpu>
<os>
<type arch='x86_64' machine='rhel6.5.0'>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'/>
<source file='/kvm/vm4.img'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</disk>
<disk type='block' device='cdrom'>
<driver name='qemu' type='raw'/>
<target dev='hdc' bus='ide'/>
<readonly/>
<address type='drive' controller='0' bus='1' target='0' unit='0'/>
</disk>
<controller type='usb' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:41:d6:44'/>
<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='mouse' bus='ps2'/>
<graphics type='vnc' port='5913' autoport='no' listen='0.0.0.0'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<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='0x05' function='0x0'/>
</memballoon>
</devices>
<seclabel type='none'/>
</domain>
2>、copy源vm的磁盘文件
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# ll
总用量 3035208
-rwxr-xr-x 1 root root 7516192768 7月 9 17:34 vm2.img
-rwxr-xr-x 1 root root 7516192768 7月 9 18:01 vm3.img
# cp vm2.img vm4.img
3>、新定义目标vm
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# virsh define /etc/libvirt/qemu/vm4.xml
定义域 vm4(从 /etc/libvirt/qemu/vm4.xml)
4>、启动vm并修改vm系统信息
vm所要修改的大概有几点
1、修改hosts
2、修改主机名
3、修改网卡配置,ip、uuid等
4、6.0以上系统第一次开机最好要删除文件 (/etc/udev/rules.d/70-persistent-net.rules) 然后重启
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