1、ESXI将虚拟机导出

ESXI迁移至KVM (V2V迁移) - 图1
导出ova模板
ESXI迁移至KVM (V2V迁移) - 图2
将导出的ova模板导入到KVM环境中。

2、配置KVM环境

详情参考：http://www.cnblogs.com/clsn/p/8366251.html
安装所需要的组件

  1. [root@clsn7 ~]# yum install libvirt* virt-* qemu-kvm* -y

配置桥接网卡

  1. [root@clsn7 ~]# virsh iface-bridge eth1 br1 
  2. 使用附加设备 br1 生成桥接 eth1 失败
  3. 已启动桥接接口 br1

3、导入虚拟机

启动kvm管理程序，并设置开机自启动

  1. [root@clsn7 ~]# systemctl start libvirtd.service
  2. [root@clsn7 ~]# systemctl enable libvirtd.service

创建虚拟机存放目录

  1. [root@clsn7 ~]# virt-v2v -i ova centos-dev-test01-v2v.ova -o local -os /vmhost/dev/dev-test01  -of qcow2 
  2. [   0.0] Opening the source -i ova centos-dev-test01-v2v.ova
  3. virt-v2v: warning: making OVA directory public readable to work around 
  4. libvirt bug https://bugzilla.redhat.com/1045069
  5. [  23.1] Creating an overlay to protect the source from being modified
  6. [  23.4] Initializing the target -o local -os /vmhost/dev/dev-test01
  7. [  23.4] Opening the overlay
  8. [  41.4] Inspecting the overlay
  9. [  57.5] Checking for sufficient free disk space in the guest
  10. [  57.5] Estimating space required on target for each disk
  11. [  57.5] Converting CentOS release 6.9 (Final) to run on KVM
  12. virt-v2v: This guest has virtio drivers installed.
  13. [ 178.6] Mapping filesystem data to avoid copying unused and blank areas
  14. [ 178.9] Closing the overlay
  15. [ 179.4] Checking if the guest needs BIOS or UEFI to boot
  16. [ 179.4] Assigning disks to buses
  17. [ 179.4] Copying disk 1/1 to /vmhost/dev/dev-test01/centos-dev-test01-v2v-sda (qcow2)
  18.     (100.00/100%)
  19. [ 216.1] Creating output metadata
  20. [ 216.1] Finishing off

导入完成后在 /vmhost/dev/dev-test01 目录下会生成文件

  1. [root@clsn7 dev-test01]# pwd
  2. /vmhost/dev/dev-test01
  3. [root@clsn7 dev-test01]# ls
  4. centos-dev-test01-v2v-sda  centos-dev-test01-v2v.xml

修改网卡配置
　　修改网卡source network 为桥接
　　修改网卡使用virtio

  1. [root@clsn7 dev-test01]# cat centos-dev-test01-v2v.xml 
  2. <?xml version='1.0' encoding='utf-8'?>
  3. <domain type='kvm'>
  4.   <!-- generated by virt-v2v 1.36.3rhel=7,release=6.el7_4.3,libvirt -->
  5.   <name>centos-dev-test01-v2v</name>
  6.   <memory unit='KiB'>524288</memory>
  7.   <currentMemory unit='KiB'>524288</currentMemory>
  8.   <vcpu>1</vcpu>
  9.   <features>
  10.     <acpi/>
  11.     <apic/>
  12.   </features>
  13.   <os>
  14.     <type arch='x86_64'>hvm</type>
  15.   </os>
  16.   <on_poweroff>destroy</on_poweroff>
  17.   <on_reboot>restart</on_reboot>
  18.   <on_crash>restart</on_crash>
  19.   <devices>
  20.     <disk type='file' device='disk'>
  21.       <driver name='qemu' type='qcow2' cache='none'/>
  22.       <source file='/vmhost/dev/dev-test01/centos-dev-test01-v2v-sda'/>
  23.       <target dev='vda' bus='virtio'/>
  24.     </disk>
  25.     <disk device='cdrom' type='file'>
  26.       <driver name='qemu' type='raw'/>
  27.       <target dev='hda' bus='ide'/>
  28.     </disk>
  29.     <disk device='floppy' type='file'>
  30.       <driver name='qemu' type='raw'/>
  31.       <target dev='fda'/>
  32.     </disk>
  33.     <interface type='bridge'>
  34.       <source bridge='br1'/>
  35.       <model type='virtio'/>
  36.       <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
  37.     </interface>
  38.     <video>
  39.       <model type='qxl' ram='65536' heads='1'/>
  40.     </video>
  41.     <graphics type='vnc' autoport='yes' port='-1'/>
  42.     <input type='tablet' bus='usb'/>
  43.     <input type='mouse' bus='ps2'/>
  44.     <console type='pty'/>
  45.   </devices>
  46. </domain>

4、启动虚拟机

导入主机

  1. [root@clsn7 dev-test01]# virsh  define centos-dev-test01-v2v.xml  
  2. 定义域 centos-dev-test01-v2v（从 centos-dev-test01-v2v.xml）

查看主机列表

  1. [root@clsn7 dev-test01]#  virsh list --all 
  2.  Id    名称                         状态
  3. ----------------------------------------------------
  4.  -     centos-dev-test01-v2v          关闭

启动主机

  1. [root@clsn7 dev-test01]#  virsh start centos-dev-test01-v2v 
  2. 域 centos-dev-test01-v2v 已开始

5、测试可用性

登陆迁移后的虚拟机测试

  1. [root@clsn7 ~]# ssh root@192.168.19.123
  2. The authenticity of host '192.168.19.123 (192.168.19.123)' can't be established.
  3. RSA key fingerprint is SHA256:iRmghFzgRIJy5+v8p4lqi8DyUG8F0hXR/qNdDZ2J6RY.
  4. RSA key fingerprint is MD5:37:b8:56:3b:b7:85:fa:cb:d9:55:a7:44:d5:de:f8:d9.
  5. Are you sure you want to continue connecting (yes/no)? yes
  6. Warning: Permanently added '192.168.19.123' (RSA) to the list of known hosts.
  7. root@192.168.19.123's password: 
  8. Last login: Mon Mar  5 10:30:02 2018 from 192.168.19.9
  9. [root@dev-test01 ~]# hostname  -I
  10. 192.168.19.123

设置虚拟机开机自启动。

  1. [root@clsn7 ~]# virsh autostart centos-dev-test01-v2v 
  2. 域 centos-dev-test01-v2v标记为自动开始

至此一台机器的迁移完成，后续按照相同的方式将其他的虚拟机进行迁移即可。