kvm桥接模式的示例代码

KVM桥接模式的示例代码

在KVM桥接模式下，虚拟机可以直接访问主机的网络设备，不需要通过NAT或者路由器。这种模式下，虚拟机的IP地址可以与主机上的物理网络设备共享。

下面是一个使用KVM桥接模式的示例代码：

#!/bin/bash # create a tap device on the host tap=tap0 # create a macvtap device on the host macvtap=macvtap0 # create a network bridge on the host br=br0 # create a virtual machine vm=vm1 # the ip address of the virtual machine vm_ip=192.168.1.2 # the netmask of the virtual machine vm_netmask=255.255.255.0 # the gateway of the virtual machine vm_gateway=192.168.1.1 # create the tap device on the host ip tuntap add $tap mode tap # create the macvtap device on the host ip link add $macvtap link $br type macvtap mode bridge # bring up the tap device on the host ip link set $tap up # bring up the macvtap device on the host ip link set $macvtap up # add the tap device to the bridge brctl addif $br $tap # add the macvtap device to the bridge brctl addif $br $macvtap # start the virtual machine virsh create /etc/libvirt/qemu/$vm.xml # configure the network of the virtual machine virsh attach-device $vm /etc/libvirt/qemu/ifupdown.xml # wait for the virtual machine to start sleep 5 # configure the IP address of the virtual machine on the host ip addr add $vm_ip/$vm_netmask dev $tap # configure the gateway of the virtual machine on the host ip route add default via $vm_gateway dev $tap