1.ESXi到KVM之v2v情况说明
(1).配置任务列表：
1)VMwareESXi虚拟平台下linux系统迁移到KVM虚拟平台。
2)VMwareESXi虚拟平台下windows系统迁移到KVM虚拟平台。
提示：本文只介绍以上两种迁移过程，KVM到ESXi之v2v可以采用VMwareconvert工具进行迁移。
(2).VMwareESXi6.0及虚拟机情况说明
VMwareESXi6.0
IP地址：192.168.21.222
帐号：root/123456
(3).CentOS7.2是采用CentOS7.2x86_64虚拟机，IP地址：192.168.21.221
(4).kvm虚拟平台配置注意项,KVM存储池配置简要过程
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# mkdir -p /data/vmfs
# virsh pool-define-as vmdisk --type dir --target /data/vmfs
# virsh pool-build vmdisk
# virsh pool-autostart vmdisk
# virsh pool-start vmdisk
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2.VMwareESXi虚拟平台下linux系统迁移到KVM虚拟平台
(1)KVM虚拟机配置，创建esxi认证文件
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[root@node1 ~]
# cat .netrc
machine 192.168.21.222 login root password 3dmedcom
[root@node1 ~]
#
[root@node1 ~]
# chmod 0600 ~/.netrc
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被迁移的虚拟机必须为关机状态，否则会出现如下提示。
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[root@node1 ~]
# virt-v2v -ic esx://192.168.21.222/?no_verify=1 -op vmdisk -b br0 CentOS7.2
virt-v2v: Guest CentOS7.2 is currently running. It must be shut down first.
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(2)开始迁移
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[root@node1 ~]
# virt-v2v -ic esx://192.168.21.222/?no_verify=1 -op vmdisk -b br0 CentOS7.2
CentOS7.2_CentOS7.2: 100% [==================================================================================]D 1h46m33s
virt-v2v: No capability
in
config matches os=
'linux'
name=
'virtio'
distro=
'centos'
major=
'7'
minor=
'2'
virt-v2v: CentOS7.2 configured without virtio drivers.
[root@node1 ~]
#
[root@node1 ~]
# virsh list --all
Id Name State
----------------------------------------------------
- CentOS6.5-01 shut off
- CentOS7.2 shut off
- Ser08R2-01 shut off
[root@node1 ~]
# ll -h /data/vmfs/
total 53G
-rw-r--r-- 1 root root 384K Nov 22 17:06 CentOS6.5-01_add.qcow2
-rw-r--r-- 1 root root 2.2G Nov 28 09:53 CentOS6.5-01.qcow2
-rw------- 1 root root 50G Nov 28 13:08 CentOS7.2_CentOS7.2
[root@node1 ~]
#
[root@node1 ~]
# virsh start CentOS7.2
Domain CentOS7.2 started
[root@node1 ~]
# virsh list --all
Id Name State
----------------------------------------------------
7 CentOS7.2 running
- CentOS6.5-01 shut off
- Ser08R2-01 shut off
[root@node1 ~]
#
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查看配置文件，磁盘格式是raw格式，磁盘文件名为如下格式。
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[root@node1 ~]
# virsh dumpxml CentOS7.2
<domain
type
=
'kvm'
id
=
'7'
>
<name>CentOS7.2<
/name
>
<uuid>37039346-b5a7-63dd-a87c-22300697c483<
/uuid
>
<memory unit=
'KiB'
>524288<
/memory
>
<currentMemory unit=
'KiB'
>524288<
/currentMemory
>
<vcpu placement=
'static'
>1<
/vcpu
>
<os>
<
type
arch=
'x86_64'
machine=
'rhel6.6.0'
>hvm<
/type
>
<boot dev=
'hd'
/>
<
/os
>
<features>
<acpi/>
<apic/>
<
/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
=
'/data/vmfs/CentOS7.2_CentOS7.2'
/>
<target dev=
'hda'
bus=
'ide'
/>
<
alias
name=
'ide0-0-0'
/>
<address
type
=
'drive'
controller=
'0'
bus=
'0'
target=
'0'
unit=
'0'
/>
<
/disk
>
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登录控制台查看迁移的虚拟机IP地址并更改
ssh登录正常
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3.VMwareESXi虚拟平台下windows系统迁移到KVM虚拟平台
(1)KVM虚拟主机上需要安装支持windows文件系统与驱动的支持，需要安装如下支持包，下载地址。
libguestfs-winsupport-1.0-7.el6.x86_64.rpm
virtio-win-1.2.0-1.el6.noarch.rpm
http://remoteoutpost.nl/repos/RHEL6-Server-Supplementary/virtio-win-1.2.0-1.el6.noarch.rpm
(2)开始迁移
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[root@node1 ~]
# virt-v2v -ic esx://192.168.21.222/?no_verify=1 -op vmdisk -b br
0 Ser08R2-01
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通过管理器中查看,系统启动正常。
查看设备管理器，发现磁盘驱动与网卡驱动都进行了优化。
到此ESXi虚拟机到KVM迁移过程完毕。反过来的话就需要采用VMware的迁移工具进行迁移了。
本文转自 dengaosky 51CTO博客，原文链接：http://blog.51cto.com/dengaosky/2045068，如需转载请自行联系原作者
