QEMU-GA installation and monitoring development under Windows

Windows installation Qemu-gaadd virtio serial port in virtual machine configuration

#virsh Edit Instance-name

Add the following configuration in the devices,

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>

Installing the QEMU Guest Agent service

#wget Https://fedorapeople.org/groups/virt/virtio-win/virtio-win.repo -o/etc/yum.repos.d/ Virtio-win.repo

#yum Install Virtio-win

Install the Virtio-win package, Virtio-win contains the Windows Virtio device driver, and the QEMU-GA installation package.

Copy the MSI installation files and Virtio-win.iso to Windows.

Virtio-win.iso contains virtio serial drivers under each version of Windows, with the corresponding version installed the driver.

Install the corresponding version qemu-ga.msi, at this point, QGA installation is complete.

qga Feature ExtensionsBuild the build environment:

• RPM-IVH Epel-release

• Download the Microsoft VSS SDK: http://www.microsoft.com/en-us/download/details.aspx?id=23490

• Extract the source files for the Microsoft VSS SDK (Extract-vsssdk-headers is available under qemu/scripts, or it can be copied to Linux under Windows)

• 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

Add a feature example (add memory usage detection)

Edit Qapi-schema.json, add custom struct body and command declaration.

1 # # struct Declaration2 # @GuestMemInfo3     #4 # Information about Memory usage.5     #6 # @total: Total size of Memory7     #8 # @usage: Memory usage9     #Ten# Since2.6 One     ## A{'struct':'Guestmeminfo', -       'Data': {' Total':'int','usage':'int' } } -            the # # Command Declaration -# @guest-Get-mem-Usage: -     # - # Get the memory utilization rate. +     # - # Returns: @GuestMemInfo on success. +     # A# Since2.6 at     ## -{'Command':'Guest-get-mem-usage', -       'returns':'Guestmeminfo'}

To add a command implementation in COMMANDS-WIN32.C:

1Guestmeminfo *qmp_guest_get_mem_usage (Error * *ERRP)2 {3 Memorystatus MS;4Guestmeminfo *meminfo = g_new0 (Guestmeminfo,1);5GlobalMemoryStatus (&ms);6Meminfo->usage =(int64_t) ms.dwmemoryload;7Meminfo->total =(int64_t) Ms.dwtotalphys;8       returnMeminfo;9}

Add the command implementation in COMMANDS-POSIX.C (return qerr_unsupported error directly):

1 guestmeminfo *qmp_guest_get_mem_usage (Error * *ERRP)2{3   ERROR_SETG (ERRP, qerr_unsupported); 4 }

Recompile the Qemu-ga.exe, replace the Qemu-ga.exe under the C:\Program files\qemu-ga, and restart the service.

(DLL dependent, can be found under/usr/x86_64-w64-mingw32/sys-root/mingw/bin/.) )

Reference documents:

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

QEMU-GA installation and monitoring development under Windows