image config
<features>
<acpi/>
</features>
<memory>MEMORY</memory>
<vcpu>VCPUS</vcpu>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file'>
<source file='BASEPATH/disk'/>
<target dev='vda' bus='virtio'/>
</disk>
<disk type='file'>
<source file='BASEPATH/disk2'/>
<target dev='vdb' bus='virtio'/>
</disk>
<interface type='bridge'>
<source bridge='BRIDGEDEV'/>
<mac address='PRIVMACADDR'/>
<model type='virtio'/>
</interface>
<serial type="file">
<source path='BASEPATH/console.log'/>
<target port='1'/>
</serial>
<graphics type='vnc' listen='' port=PORT passwd=PORT />
</devices>
<domain type='kvm'>
<name>i-4771079E</name>
<os>
<type>hvm</type>
<kernel>/opt/awcloud/instance/admin/i-4771079E/kernel</kernel>
<initrd>/opt/awcloud/instance/admin/i-4771079E/ramdisk</initrd>
<cmdline>root=/dev/vda1 console=ttyS0</cmdline>
</os>
<features>
<acpi/>
</features>
<memory>131072</memory>
<vcpu>1</vcpu>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file'>
<source file='/opt/awcloud/instance/admin/i-4771079E/disk'/>
<target dev='vda' bus='virtio'/>
</disk>
<disk type='file'>
<source file='/opt/awcloud/instance/admin/i-4771079E/disk2'/>
<target dev='vdb' bus='virtio'/>
</disk>
<interface type='bridge'>
<source bridge='awtoolbr10'/>
<mac address='d0:0d:47:71:07:9E'/>
<model type='virtio'/>
</interface>
<serial type="file">
<source path='/opt/awcloud/instance/admin/i-4771079E/console.log'/>
<target port='1'/>
</serial>
<graphics type='vnc' listen='' port='30000' passwd='30000' />
</devices>
</domain>
利用virtio bus。因为SCSI emulation in kvm is not supported yet. In rhel 5.4 this is disabled. Use virtio drivers to enhance performance.
