openstack 创建镜像时遇到 failed to find romfile "pxe-rtl8139.rom"
在ubuntu12.04中创建openstack镜像时会报以下信息：sudokvm-m1024-cdromCentOS-6.2-x86_64-bin-DVD1.iso-drivefile=CentOS-6.2-x86_64.img,if=scsi,index=0-bootd-netnic-netuser-usbdevicetablet–nographic-vnc:4kvm:pci_add_opti