KVM virsh console

（1）查看正在运行的虚拟机

root@kvm:~# virsh list

 Id Name State

----------------------------------------------------

 11 kvm1 running

（2）把配置文件输出到标准输出

root@kvm:~# virsh dumpxml kvm1

　输出：

<domain type='kvm' id='11'>

 <name>kvm1</name>

 <uuid>9eb9a2e9-abb2-54c5-5cb3-dc86728e70fc</uuid>

 <memory unit='KiB'>1048576</memory>

 <currentMemory unit='KiB'>1048576</currentMemory>

 <vcpu placement='static'>1</vcpu>

 <resource>

   <partition>/machine</partition>

 </resource>

 <os>

   <type arch='x86_64' machine='pc-i440fx-trusty'>hvm</type>

   <boot dev='hd'/>

 </os>

 <features>

   <acpi/>

   <apic/>

 <pae/>

 </features>

 <clock offset='utc'/>

 <on_poweroff>destroy</on_poweroff>

<on_reboot>restart</on_reboot>

 <on_crash>restart</on_crash>

 <devices>

   <emulator>/usr/bin/qemu-system-x86_64</emulator>

   <disk type='file' device='disk'>

     <driver name='qemu' type='raw'/>

     <source file='/tmp/debian.img'/>

     <target dev='hda' bus='ide'/>

     <alias name='ide0-0-0'/>

     <address type='drive' controller='0' bus='0' target='0' unit='0'/>

   </disk>

   <controller type='usb' index='0'>

     <alias name='usb0'/>

     <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>

   </controller>

   <controller type='pci' index='0' model='pci-root'>

<alias name='pci.0'/>

   </controller>

   <controller type='ide' index='0'>

     <alias name='ide0'/>

     <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>

   </controller>

   <interface type='network'>

     <mac address='52:54:00:d1:70:df'/>

     <source network='default'/>

     <target dev='vnet0'/>

     <model type='rtl8139'/>

    <alias name='net0'/>

    <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>

   </interface>

   <serial type='pty'>

     <source path='/dev/pts/0'/>

     <target port='0'/>

     <alias name='serial0'/>

   </serial>

   <console type='pty' tty='/dev/pts/0'>

     <source path='/dev/pts/0'/>

     <target type='serial' port='0'/>

     <alias name='serial0'/>

   </console>

   <input type='mouse' bus='ps2'/>

   <input type='keyboard' bus='ps2'/>

   <graphics type='vnc' port='5900' autoport='yes' listen='146.20.141.158'>

     <listen type='address' address='146.20.141.158'/>

   </graphics>

   <video>

     <model type='cirrus' vram='9216' heads='1'/>

     <alias name='video0'/>

     <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>

   </video>

   <memballoon model='virtio'>

     <alias name='balloon0'/>

     <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>

   </memballoon>

 </devices>

 <seclabel type='none'/>

</domain>

（3）保存配置到新的文件

root@kvm:~# virsh dumpxml kvm1 > kvm1.xml

root@kvm:~# head kvm1.xml

<domain type='kvm' id='11'>

 <name>kvm1</name>

 <uuid>9eb9a2e9-abb2-54c5-5cb3-dc86728e70fc</uuid>

 <memory unit='KiB'>1048576</memory>

 <currentMemory unit='KiB'>1048576</currentMemory>

 <vcpu placement='static'>1</vcpu>

 <resource>

   <partition>/machine</partition>

 </resource>

 <os>

（4）编辑配置文件

root@kvm:~# virsh edit kvm1

Domain kvm1 XML configuration edited.

二. virt-install安装kvm且使用console方式

去构建KVM实例并用console口连接它，执行以下步骤：

（1）使用官方Debian库安装KVM虚拟机

root@kvm:~# virt-install --name kvm1 --ram 1024 --extra-args="text console=tty0 utf8 console=ttyS0,115200" --graphics vnc,listen=146.20.141.158 --hvm --location=http://ftp.us.debian.org/debian/dists/stable/main/installer-amd64/ --disk path=/tmp/kvm1.img,size=8

Retrieving file MANIFEST... | 3.3 kB 00:00 ...

Retrieving file linux... | 6.0 MB 00:00 ...

Retrieving file initrd.gz... | 29 MB 00:00 ...

Creating storage file kvm1.img | 8.0 GB 00:00

WARNING Unable to connect to graphical console: virt-viewer not installed. Please install the 'virt-viewer' package.

Domain installation still in progress. You can reconnect to

the console to complete the installation process.

（2）运行以下的代码去和console口关联

root@kvm:~# virsh console kvm1

Connected to domain kvm1

Escape character is ^]

（3）关联上console口后，应该看到如下画面。

![](https://s1.51cto.com/images/blog/201806/04/a5554006bd6ddf8fa06b5535ef8f5c17.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)

（4）根据提示的菜单栏完成安装

（5）然后启动虚拟机

root@kvm:~# virsh start kvm1

Domain kvm1 started

（6）使用vnc连接然后开启Serial 控制台访问

root@debian:~# systemctl enable [email protected]

root@debian:~# systemctl start [email protected]

（7）关闭vnc的连接，然后使用virsh console去连接它。

root@kvm:~# virsh console kvm1

Connected to domain kvm1

Escape character is ^]

Debian GNU/Linux 8 debian ttyS0

debian login: root

Password:

Last login: Wed Mar 22 16:38:10 CDT 2017 on tty1

Linux debian 3.16.0-4-amd64 #1 SMP Debian 3.16.39-1+deb8u2 (2017-03-07) x86_64

The programs included with the Debian GNU/Linux system are free software;

the exact distribution terms for each program are described in the

individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent

permitted by applicable law.

root@debian:~# free -m

 total used free shared buffers cached

Mem: 1000 98 902 4 9 43

-/+ buffers/cache: 44 956

Swap: 382 0 382

kvm