on Ubuntu 20.04 Server
cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
# 安装kvm相关命令
apt install virtinst libvirt-daemon-system bridge-utils cloud-utils libguestfs-tools virt-top
# nmcli 指令创建系统桥接网卡（这种方式适合使用NetworkManager托管网络的系统）
nmcli con add type bridge con-name br0 ifname br0 autoconnect yes
nmcli con add type bridge-slave ifname eno1 master br0
nmcli con modify br0 bridge.stp no
nmcli con modify br0 ipv4.method manual ipv4.addresses "192.168.999.999/24" ipv4.gateway "192.168.999.254" ipv4.dns "192.168.999.250"
nmcli con show
nmcli con up br0
nmcli connection down "Wired connection 1"
nmcli con down br0
nmcli con delete br0
# 通过 netplan 配置文件创建系统桥接网卡
cat >br0.xml <<EOF
network:
version: 2
ethernets:
enp1s0:
dhcp4: false
bridges:
br0:
dhcp4: false
interfaces: [enp1s0]
addresses: [192.168.999.999/24]
gateway4: 192.168.999.254
nameservers:
addresses: [192.168.999.250]
parameters:
stp: false
EOF
netplan apply
# 在系统桥接网卡上创建虚拟机桥接网卡
cat >br0.xml <<EOF
<network>
<name>br0</name>
<forward mode="bridge"/>
<bridge name="br0"/>
</network>
EOF
virsh net-define br0.xml
virsh net-autostart br0
virsh net-start br0
