Add switch for enabling qemu guest agent virtio channel

Author: ThomasSchlien

README.md

@@ -94,6 +94,9 @@ Role Variables
     - `enable_spice`: If true enables SPICE listening for use with
       Virtual Machine Manager and similar tools
 
+    - `enable_guest_virtio`: If true enables guest virtio device for use with
+      Qemu guest agent
+
     - `volumes`: a list of volumes to attach to the VM.  Each volume is
       defined with the following dict:
         - `type`: What type of backing volume does the instance use? All

tasks/main.yml

@@ -46,6 +46,7 @@
     autostart: "{{ vm.autostart | default(true) }}"
     enable_vnc: "{{ vm.enable_vnc | default(false) }}"
     enable_spice: "{{ vm.enable_spice | default(false) }}"
+    enable_guest_virtio: "{{ vm.enable_guest_virtio | default(false) }}"
     boot_firmware: "{{ vm.boot_firmware | default('bios', true) | lower }}"
   with_items: "{{ libvirt_vms }}"
   loop_control:

templates/vm.xml.j2

@@ -124,6 +124,11 @@
       <listen type='address'/>
     </graphics>
 {% endif %}
+{% if enable_guest_virtio |bool %}
+    <channel type='unix'>
+      <target type='virtio' name='org.qemu.guest_agent.0'/>
+    </channel>
+{% endif %}
 {% for usb_device in usb_devices %}
     <hostdev mode='subsystem' type='usb' managed='yes'>
       <source>