config: virtio_rng addition

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

README.md

@@ -148,6 +148,8 @@ image. This is slower but allows multiple VMs to be booted at the same time.
   It keeps resource online but execution is stopped.
   When VM has a device that is not supported `hibernate`, automatically use
   `pause` regardless of this.
+* `virtio_rng` - boolean for optional virtio device of random number generator.
+  QEMU 1.3.0 and after support this device. default `false`
 
 
 ## Comparison with [Vagrant-libvirt](https://github.com/pradels/vagrant-libvirt)

lib/vagrant-kvm/action/import.rb

@@ -36,6 +36,7 @@ def call(env)
             :machine_type  => provider_config.machine_type,
             :network_model => provider_config.network_model,
             :video_model   => provider_config.video_model,
+            :virtio_rng    => provider_config.virtio_rng
           }.merge(args)
 
           args[:disk_bus]   = provider_config.disk_bus if provider_config.disk_bus

lib/vagrant-kvm/config.rb

@@ -64,6 +64,7 @@ class Config < Vagrant.plugin("2", :config)
       attr_accessor :network_model
       attr_accessor :video_model
       attr_accessor :sound
+      attr_accessor :virtio_rng
 
       # disk bus type
       # sata/virtio
@@ -92,6 +93,7 @@ def initialize
         @sound            = UNSET_VALUE
         @force_pause      = UNSET_VALUE
         @enable_virtfs    = UNSET_VALUE
+        @virtio_rng       = UNSET_VALUE
       end
 
       # Customize the VM by predefined actions.
@@ -172,6 +174,7 @@ def finalize!
         @sound = false if @sound == UNSET_VALUE
         @force_pause = false if @force_pause == UNSET_VALUE
         @enable_virtfs = false if @enable_virtfs == UNSET_VALUE
+        @virtio_rng = nil if @virtio_rng == UNSET_VALUE
       end
 
       def validate(machine)

lib/vagrant-kvm/driver/driver.rb

@@ -152,6 +152,7 @@ def import(definition, volume_name, args={})
             :disk => volume_path,
             :name => @name
           }.merge(args)
+          args.merge!(:virtio_rng => nil) if @conn.version.to_i < 1003000  # virtio_rng supported in 1.3.0+
           definition.update(args)
           # create vm
           @logger.info("Creating new VM")

templates/libvirt_domain.erb

@@ -98,5 +98,11 @@
      </filesystem>
      <% end %>
    <% end %>
+   <% if virtio_rng %>
+    <rng model='virtio'>
+      <rate period="2000" bytes="1234"/>
+      <backend model='random'>/dev/random</backend>
+    </rng>
+   <% end %>
   </devices>
 </domain>