ESXI 迁移至KVM (V2V迁移)

1.1.1 ESXI将虚拟机导出

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导出ova模板

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将导出的ova模板导入到KVM环境中。

1.1.2 配置KVM环境

[root@clsn7 ~]# yum install libvirt* virt-* qemu-kvm* -y
配置桥接网卡
[root@clsn7 ~]# virsh iface-bridge eth1 br1 
使用附加设备 br1 生成桥接 eth1 失败
已启动桥接接口 br1

详情参考：http://www.cnblogs.com/clsn/p/8366251.html

安装所需要的组件
1.1.3 导入虚拟机

启动kvm管理程序，并设置开机自启动

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

创建虚拟机存放目录

# 如果没有virt-v2v命令，需要提前安装
[root@clsn7 ~]# yum install -y virt-v2v -y
[root@clsn7 ~]# virt-v2v -i ova centos-dev-test01-v2v.ova -o local -os /vmhost/dev/dev-test01  -of qcow2 
[   0.0] Opening the source -i ova centos-dev-test01-v2v.ova
virt-v2v: warning: making OVA directory public readable to work around 
libvirt bug https://bugzilla.redhat.com/1045069
[  23.1] Creating an overlay to protect the source from being modified
[  23.4] Initializing the target -o local -os /vmhost/dev/dev-test01
[  23.4] Opening the overlay
[  41.4] Inspecting the overlay
[  57.5] Checking for sufficient free disk space in the guest
[  57.5] Estimating space required on target for each disk
[  57.5] Converting CentOS release 6.9 (Final) to run on KVM
virt-v2v: This guest has virtio drivers installed.
[ 178.6] Mapping filesystem data to avoid copying unused and blank areas
[ 178.9] Closing the overlay
[ 179.4] Checking if the guest needs BIOS or UEFI to boot
[ 179.4] Assigning disks to buses
[ 179.4] Copying disk 1/1 to /vmhost/dev/dev-test01/centos-dev-test01-v2v-sda (qcow2)
    (100.00/100%)
[ 216.1] Creating output metadata
[ 216.1] Finishing off

# centos-dev-test01-v2v.ova 为导出虚拟机名称
# /vmhost/dev/dev-test01  导入kvm的新目录

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

[root@clsn7 dev-test01]# pwd
/vmhost/dev/dev-test01
[root@clsn7 dev-test01]# ls
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

[root@clsn7 dev-test01]# cat centos-dev-test01-v2v.xml 
<?xml version='1.0' encoding='utf-8'?>
<domain type='kvm'>
  <!-- generated by virt-v2v 1.36.3rhel=7,release=6.el7_4.3,libvirt -->
  <name>centos-dev-test01-v2v</name>
  <memory unit='KiB'>524288</memory>
  <currentMemory unit='KiB'>524288</currentMemory>
  <vcpu>1</vcpu>
  <features>
    <acpi/>
    <apic/>
  </features>
  <os>
    <type arch='x86_64'>hvm</type>
  </os>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/vmhost/dev/dev-test01/centos-dev-test01-v2v-sda'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <disk device='cdrom' type='file'>
      <driver name='qemu' type='raw'/>
      <target dev='hda' bus='ide'/>
    </disk>
    <disk device='floppy' type='file'>
      <driver name='qemu' type='raw'/>
      <target dev='fda'/>
    </disk>
    <interface type='bridge'>
      <source bridge='br1'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <video>
      <model type='qxl' ram='65536' heads='1'/>
    </video>
    <graphics type='vnc' autoport='yes' port='-1'/>
    <input type='tablet' bus='usb'/>
    <input type='mouse' bus='ps2'/>
    <console type='pty'/>
  </devices>
</domain>

1.1.4 启动虚拟机

导入主机

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

查看主机列表

[root@clsn7 dev-test01]#  virsh list --all 
 Id    名称                         状态
----------------------------------------------------
 -     centos-dev-test01-v2v          关闭

启动主机

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

1.1.5 测试可用性

登陆迁移后的虚拟机测试

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

设置虚拟机开机自启动。

[root@clsn7 ~]# virsh autostart centos-dev-test01-v2v 
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。