nova修改libvirt.xml及自定义xml文件修改nova代码支持vhost

发布时间：2020-12-16 08:45:55 所属栏目：百科来源：网络整理

导读：interface type='bridge' mac address='00:1a:4a:4d:63:a0'/ source bridge='sdcos-vmnet'/ model type='virtio'/ filterref filter='vdsm-no-mac-spoofing'/ link state='up'/ bandwidth /bandwidth address type='pci' domain='0x0000' bus='0x00' slot='0

</bandwidth>

</interface>

<driver name='qemu'/> #加上此配置文件，则启动的虚拟机参数中就会有vhost=off

修改nova代码支持：

def get_config(self,instance,vif,image_meta,inst_type):

conf = vconfig.LibvirtConfigGuestInterface()

# Default to letting libvirt / the hypervisor choose the model

model = None

driver = None

# If the user has specified a 'vif_model' against the

# image then honour that model

if image_meta:

vif_model = image_meta.get('properties',

{}).get('hw_vif_model')

if vif_model is not None:

model = vif_model

# Else if the virt type is KVM/QEMU,use virtio according

# to the global config parameter

if (model is None and

CONF.libvirt.virt_type in ('kvm','qemu') and

CONF.libvirt.use_virtio_for_bridges):

model = "virtio"

# Workaround libvirt bug,where it mistakenly

# enables vhost mode,even for non-KVM guests

if model == "virtio" and CONF.libvirt.virt_type == "qemu":

driver = "qemu"

修改为：

if model == "virtio" and CONF.libvirt.virt_type == "qemu":

driver = "qemu"

driver = "qemu"//增加此句，代表永远为qemu

（编辑：李大同）

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