Merge pull request #118 from sciurus/configurable_disk_bus

Allow changing disk bus

README.md

@@ -103,6 +103,7 @@ This provider exposes quite a few provider-specific configuration options:
 
 ### Domain Specific Options
 
+* `disk_bus` - The type of disk device to emulate. Defaults to virtio if not set. Possible values are documented in libvirt's [description for _target_](http://libvirt.org/formatdomain.html#elementsDisks).
 * `memory` - Amount of memory in MBytes. Defaults to 512 if not set.
 * `cpus` - Number of virtual cpus. Defaults to 1 if not set.
 * `nested` - [Enable nested virtualization](https://github.com/torvalds/linux/blob/master/Documentation/virtual/kvm/nested-vmx.txt). Default is false.
@@ -121,7 +122,7 @@ Vagrant.configure("2") do |config|
       domain.memory = 2048
       domain.cpus = 2
       domain.nested = true
-	  domain.volume_cache = 'none'
+      domain.volume_cache = 'none'
     end
   end
 

lib/vagrant-libvirt/action/create_domain.rb

@@ -20,6 +20,7 @@ module VagrantPlugins
           @name = env[:domain_name]
           @cpus = config.cpus
           @cpu_mode = config.cpu_mode
+          @disk_bus = config.disk_bus
           @nested = config.nested
           @memory_size = config.memory*1024
           @domain_volume_cache = config.volume_cache

lib/vagrant-libvirt/config.rb

@@ -32,6 +32,7 @@ module VagrantPlugins
       attr_accessor :memory
       attr_accessor :cpus
       attr_accessor :cpu_mode
+      attr_accessor :disk_bus
       attr_accessor :nested
       attr_accessor :volume_cache
 
@@ -49,6 +50,7 @@ module VagrantPlugins
         @memory            = UNSET_VALUE
         @cpus              = UNSET_VALUE
         @cpu_mode          = UNSET_VALUE
+        @disk_bus          = UNSET_VALUE
         @nested            = UNSET_VALUE
         @volume_cache      = UNSET_VALUE
       end
@@ -67,6 +69,7 @@ module VagrantPlugins
         @memory = 512 if @memory == UNSET_VALUE
         @cpus = 1 if @cpus == UNSET_VALUE
         @cpu_mode = 'host-model' if @cpu_mode == UNSET_VALUE
+        @disk_bus = 'virtio' if @disk_bus == UNSET_VALUE
         @nested = false if @nested == UNSET_VALUE
         @volume_cache = 'default' if @volume_cache == UNSET_VALUE
       end

lib/vagrant-libvirt/templates/domain.xml.erb

@@ -26,7 +26,7 @@
       <driver name='qemu' type='qcow2' cache='<%= @domain_volume_cache %>'/>
       <source file='<%= @domain_volume_path %>'/>
       <%# we need to ensure a unique target dev -%>
-      <target dev='vda' bus='virtio'/>
+      <target dev='vda' bus='<%= @disk_bus %>'/>
     </disk>
     <serial type='pty'>
       <target port='0'/>