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:
- rpm -ivh epel-release
- 下载 Microsoft VSS SDK: http://www.microsoft.com/en-us/download/details.aspx?id=23490
- 提取Microsoft VSS SDK的源文件(qemu/scripts下提供了extract-vsssdk-headers,也可以在windows下解压后拷贝到linux上)
- wget http://wiki.qemu-project.org/download/qemu-2.6.0-rc1.tar.bz2
- yum install -y mingw64-pixman
- yum install -y mingw64-glib2
- yum install -y mingw64-gmp
- yum install -y mingw64-SDL
- yum install -y mingw64-pkg-config
- ./configure --enable-guest-agent --with-vss-sdk=/vss_path --cross-prefix=x86_64-w64-mingw32-
- make qemu-ga.exe
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