一、虚拟机配置文件：/etc/libvirt/qemu/
      每个KVM虚拟主机都有自己的配置文件，都是以虚拟主机名命名；KVM虚拟机的配置文件在/etc/libvirt/qemu/下，以xml文件形式存在；

[root@node3 qemu]# virsh list --all      #显示虚拟主机列表Id    Name                           State
----------------------------------------------------3     centos7.0                      running[root@node3 qemu]# ls   #查看KVM虚拟机配置文件信息
centos7.0.xml  networks [root@node3 qemu]# virsh  dominfo centos7.0 #查看centos7.0信息
Id:             3
Name:           centos7.0
UUID:           7e704227-6c82-4963-8b38-6c7065d0c722
OS Type:        hvm
State:          running
CPU(s):         1
CPU time:       260.9s
Max memory:     1048576 KiB
Used memory:    1048576 KiB
Persistent:     yes
Autostart:      enable
Managed save:   no
Security model: none
Security DOI:   0[root@node3 qemu]# virsh  autostart centos7.0  #设置centos7.0开机自启
Domain centos7.0 marked as autostarted 
[root@node3 qemu]# ls
autostart  centos7.0.xml  networks   #autostart 开机自启目录
[root@node3 qemu]# virsh edit centos7.0   #编辑虚拟机centos7.0配置文件，调用vi
[root@node3 qemu]# export EDITOR=vim      #设置virsh edit 高亮显示
[root@node3 qemu]virsh dumpxml centos7.0 > centos7.0.bak #备份centos7.0虚拟主机配置文件。

二、虚拟机网络配置文件：/etc/libvirt/qemu/networks

 [root@node3 qemu]# virsh  net-list --all  #查看网络信息Name                 State      Autostart     Persistent
----------------------------------------------------------default              active     yes           yes[root@node3 qemu]# virsh  --help |grep list  #相关list列表domblklist                     list all domain blocksdomiflist                      list all domain virtual interfaceslist                           list domainsiface-list                     list physical host interfacesnwfilter-list                  list network filtersnet-list                       list networksnodedev-list                   enumerate devices on this hostsecret-list                    list secretssnapshot-list                  List snapshots for a domainpool-list                      list poolsvol-list                       list vols[root@node3 networks]# virsh  net-edit default #编辑网络文件
<network><name>default</name><uuid>8e7a52c9-2051-4cad-bc50-93c13008ec0e</uuid><forward mode='nat'/><bridge name='virbr0' stp='on' delay='0'/><mac address='52:54:00:d2:7f:67'/><ip address='192.168.122.1' netmask='255.255.255.0'><dhcp><range start='192.168.122.2' end='192.168.122.254'/></dhcp></ip>
</network>
~            

三、虚拟机存储配置文件：/etc/libvirt/storage/

[root@node3 networks]# ll /etc/libvirt/storage/
total 12
drwxr-xr-x 2 root root  52 Aug 16 21:12 autostart
-rw------- 1 root root 531 Aug 16 21:11 dd.xml
-rw------- 1 root root 538 Aug 16 02:29 default.xml
-rw------- 1 root root 514 Aug 16 21:12 root.xml[root@node3 networks]# virsh pool-list --all  #显示存储列表Name                 State      Autostart 
-------------------------------------------dd                   active     yes       default              active     yes       root                 active     yes  [root@node3 networks]# virsh  pool-edit default #编辑存储配置文件

四、 镜像文件[磁盘文件]：/var/lib/libvirt/images/