自制云主机

# 安装KVM及相关工具
sudo apt-get update
sudo apt-get install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils

# 创建虚拟机磁盘镜像
qemu-img create -f qcow2 ubuntu-vm.qcow2 20G

# 下载Ubuntu ISO镜像
wget https://releases.ubuntu.com/20.04/ubuntu-20.04.5-live-server-amd64.iso

# 创建虚拟机配置文件
virsh edit ubuntu-vm

# 在配置文件中添加以下内容
<domain type='kvm'>
  <name>ubuntu-vm</name>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-2.9'>hvm</type>
    <boot dev='cdrom'/>
  </os>
  <devices>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/path/to/ubuntu-vm.qcow2'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <interface type='network'>
      <mac address='52:54:00:73:3a:3f'/>
      <source network='default'/>
      <model type='virtio'/>
    </interface>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes' listen='0.0.0.0' keymap='en-us'/>
  </devices>
</domain>

# 启动虚拟机
virsh start ubuntu-vm

# 连接到虚拟机
virsh console ubuntu-vm