通过命令行安装kvm组件

sudo apt install -y qemu-kvm 
sudo apt install -y virt-manager  virtinst libvirt-clients
 sudo apt install -y virt-manager  virtinst libvirt-clients

添加用户组

sudo usermod -aG kvm $USER
sudo usermod -aG libvirt $USER

检测运行状态

systemctl is-active libvirtd

通过qeum创建虚拟机
默认kvm创建的网络是nat 需要添加网桥来进行网络桥接

可选安装debug工具 bridge-utils

sudo apt install bridge-utils -y

配置网桥
利用netplan(/etc/netplan)
备份原文件 01-network-manager-all.yaml 或者50-cloud-init.yaml

sudo cp 01-network-manager-all.yaml 01-network-manager-all.yaml.bak

添加配置文件 这里添加自动获取的桥接网络（注意对齐和空格）
主机静态ip

network:
  version: 2
  ethernets:
    eno1:
      dhcp4: false
      dhcp6: false
  bridges:
    br0:
      interfaces: [eno1]
      dhcp4: false
      addresses: [192.168.0.13/24]
      routes:
        - to: default
          via: 192.168.0.1
      nameservers:
        addresses: [114.114.114.114]
      parameters:
        stp: false
      dhcp6: false

主机动态ip

network:
  version: 2
  ethernets:
    eno1:
      dhcp4: false
      dhcp6: false
  bridges:
    br0:
      interfaces: [eno1]
      dhcp4: true
      parameters:
        stp: false
      dhcp6: false

接着进行激活生效

sudo netplan apply
sudo netplan generate
sudo netplan --debug apply

重启机器然后通过图形化选择桥接网络选择br0

参考链接：https://fabianlee.org/2022/09/20/kvm-creating-a-bridged-network-with-netplan-on-ubuntu-22-04/