qemu-ga windows下的安装及监控开发

windows安装qemu-ga

  虚拟机配置里添加virtio serial端口

    #virsh edit instance-name

    devices里添加下面这段配置,

1 <channel type='unix'>
2     <source mode='bind' path='/var/lib/libvirt/qemu/org.qemu.guest_agent.0.instance-name.sock'/>
3     <target type='virtio' name='org.qemu.guest_agent.0'/>
4     <address type='virtio-serial' controller='0' bus='0' port='1'/>
5 </channel>

 

安装Qemu Guest Agent服务

  #wget https://fedorapeople.org/groups/virt/virtio-win/virtio-win.repo -O /etc/yum.repos.d/virtio-win.repo

  #yum install virtio-win

  安装virtio-win包,virtio-win里包含windows virtio设备驱动,及qemu-ga的安装包。

  

  将msi安装文件和virtio-win.iso拷贝到windows下。

  virtio-win.iso包含各个windows版本下的virtio serial驱动,安装对应版本的驱动。

  

  安装对应版本qemu-ga.msi,至此,qga安装完毕。

 

qga功能扩展

  搭建编译环境:

  添加功能示例(添加内存使用率检测)

    编辑qapi-schema.json,添加自定义结构体及命令声明。

 1     ##  结构体声明
 2     # @GuestMemInfo
 3     #
 4     # Information about Memory usage.
 5     #
 6     # @total: total size of Memory
 7     #
 8     # @usage: Memory usage
 9     #
10     # Since 2.6
11     ##
12     { 'struct': 'GuestMemInfo',
13       'data': { 'total': 'int', 'usage': 'int' } }
14           
15     ##  命令声明
16     # @guest-get-mem-usage:
17     #
18     # Get the memory utilization rate.
19     #
20     # Returns: @GuestMemInfo on success.
21     #
22     # Since 2.6
23     ##
24     { 'command': 'guest-get-mem-usage',
25       'returns': 'GuestMemInfo' }

 

    在commands-win32.c中添加命令实现:

1 GuestMemInfo *qmp_guest_get_mem_usage(Error **errp)
2 {
3       MEMORYSTATUS ms;
4       GuestMemInfo *meminfo = g_new0(GuestMemInfo, 1);
5       GlobalMemoryStatus(&ms);
6       meminfo->usage = (int64_t)ms.dwMemoryLoad;
7       meminfo->total = (int64_t)ms.dwTotalPhys;
8       return meminfo;
9 }

 

  在commands-posix.c中添加命令实现(直接返回QERR_UNSUPPORTED错误):

1 GuestMemInfo *qmp_guest_get_mem_usage(Error **errp)
2 {
3   error_setg(errp, QERR_UNSUPPORTED);
4 }

 

    重新编译qemu-ga.exe,替换C:\Program Files\qemu-ga下的qemu-ga.exe,重启服务即可。

    (dll依赖,在/usr/x86_64-w64-mingw32/sys-root/mingw/bin/下可找到。)

    

 

 

参考文献:

http://wiki.qemu.org/Features/QAPI/GuestAgent

http://wiki.libvirt.org/page/Qemu_guest_agent

http://fedoraproject.org/wiki/Windows_Virtio_Drivers

http://lists.gnu.org/archive/html/qemu-discuss/2014-11/msg00027.html

posted @ 2016-04-20 17:25  LDaniel  阅读(7085)  评论(1编辑  收藏  举报