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：1
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# virsh list --all
Id Name State
----------------------------------------------------
1 win7 running
18 hadoop4 running
20 hadoop2 running
21 hadoop1 running
- hadoop3 shut off
#
（2）准备迁移虚拟机，查看虚拟机的磁盘配置文件
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# virsh domblklist hadoop3
Target Source
------------------------------------------------
hda /images/test/hadoop3.qcow2
hdb /images/test/hadoop3_add.qcow2
hdc -
#
（3）导入虚拟机的配置文件
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# virsh dumpxml hadoop3 > /tmp/hadoop3.xml
# ll /tmp/hadoop3*
-rw-r--r-- 1 root root 3016 Feb6 12:43 /tmp/hadoop3.xml
#
（4）拷贝配置文件到目标主机上
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# 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:
#
（5）拷贝虚拟机的磁盘文件到目标主机上
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# 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:
# virsh domblklist hadoop3
Target Source
------------------------------------------------
hda /images/test/hadoop3.qcow2
hdb /images/test/hadoop3_add.qcow2
hdc -
# scp /images/test/hadoop3.qcow2 /images/test/hadoop3_add.qcow2 root@10.1.156.211:/data/test/
root@10.1.156.211's password:
#
3，在目标主机上做如下操作：
（1）查看目标虚拟主机的环境
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# virsh list --all
Id Name State
----------------------------------------------------
（2）修改目标主机的配置文件。
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#vi /etc/libvirt/qemu/hadoop3.xml
(3)定义注册虚拟主机
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# 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
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# virsh list --all
Id Name State
----------------------------------------------------
- hadoop3 shut off
# virsh start hadoop3
Domain hadoop3 started
至此，虚拟机的静态迁移成功
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