KVM虚拟化笔记（十三）------kvm虚拟机静态迁移

1.静态迁移就是虚拟机在关机状态下，拷贝虚拟机虚拟磁盘文件与配置文件到目标虚拟主机中，实现的迁移。分为以下情况：

(1)虚拟主机各自使用本地存储存放虚拟机磁盘文件（本文实现基于本地磁盘存储虚拟机磁盘文件的迁移方式）(2)虚拟主机之间使用共享存储存放虚拟机磁盘文件（该方式只是在目标虚拟主机上重新定义虚拟机就可以了）2,静态迁移的过程如下： （1）确定虚拟机处于关闭状态，本文以hadoop3为例：

[root@KVM install]# virsh list --all
Id    Name                           State
----------------------------------------------------
1     win7                           running
18    hadoop4                        running
20    hadoop2                        running
21    hadoop1                        running
-     hadoop3                        shut off
[root@KVM install]#

（2）准备迁移虚拟机，查看虚拟机的磁盘配置文件

[root@KVM install]# virsh domblklist hadoop3
Target     Source
------------------------------------------------
hda        /images/test/hadoop3.qcow2
hdb        /images/test/hadoop3_add.qcow2
hdc        -
[root@KVM install]#

（3）导入虚拟机的配置文件

[root@KVM install]# virsh dumpxml hadoop3 > /tmp/hadoop3.xml
[root@KVM install]# ll /tmp/hadoop3*
-rw-r--r-- 1 root root 3016 Feb  6 12:43 /tmp/hadoop3.xml
[root@KVM install]#

（4）拷贝配置文件到目标主机上

[root@KVM install]# scp /tmp/hadoop3.xml root@10.1.156.211:/etc/libvirt/qemu
The authenticity of host '10.1.156.211 (10.1.156.211)' can't be established.
RSA key fingerprint is 20:8e:24:a6:ef:b3:d6:71:72:bb:39:e7:88:f9:38:cd.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.1.156.211' (RSA) to the list of known hosts.
root@10.1.156.211's password:
[root@KVM install]#

（5）拷贝虚拟机的磁盘文件到目标主机上

[root@KVM install]# scp /tmp/hadoop3.xml root@10.1.156.211:/etc/libvirt/qemu
The authenticity of host '10.1.156.211 (10.1.156.211)' can't be established.
RSA key fingerprint is 20:8e:24:a6:ef:b3:d6:71:72:bb:39:e7:88:f9:38:cd.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.1.156.211' (RSA) to the list of known hosts.
root@10.1.156.211's password:
[root@KVM install]# virsh domblklist hadoop3
Target     Source
------------------------------------------------
hda        /images/test/hadoop3.qcow2
hdb        /images/test/hadoop3_add.qcow2
hdc        -
[root@KVM install]# scp /images/test/hadoop3.qcow2 /images/test/hadoop3_add.qcow2 root@10.1.156.211:/data/test/
root@10.1.156.211's password:
[root@KVM install]#

3，在目标主机上做如下操作：
（1）查看目标虚拟主机的环境

[root@KVM test]# virsh list --all
Id    Name                           State
----------------------------------------------------

（2）修改目标主机的配置文件。

[root@KVM test]#vi /etc/libvirt/qemu/hadoop3.xml

(3)定义注册虚拟主机

[root@KVM test]# virsh define /etc/libvirt/qemu/hadoop3.xml
Domain hadoop3 defined from /etc/libvirt/qemu/hadoop3.xml

（4）启动并确认虚拟机

[root@KVM test]# virsh list --all
Id    Name                           State
----------------------------------------------------
-     hadoop3                        shut off
[root@KVM test]# virsh start hadoop3
Domain hadoop3 started

至此，虚拟机的静态迁移成功