[Linux][KVM] 在ubuntu上 建立免費的虛擬主機系統

步驟1.檢查 CPU 是否有支援 KVM ?
#apt-get install cpu-checker
#kvm-ok

步驟2.開始安裝 KVM
#apt-get install kvm kvm-pxe

步驟3.檢視 KVM 系統是否啟動 ?
#lsmod | grep kvm

以上為基本安裝步驟


以下為優化KVM操作的步驟


步驟4.安裝高階命令
apt-get install libvirt-bin

步驟5.建立一支.sh檔
內容為
#!/bin/bash
[ "$USER" != "root" ] && echo "需要 root 權限" && exit 1
which virsh &>/dev/null
[ "$?" != "0" ] && echo "沒有安裝 libvirt" && exit 1
cp floppyfw-3.0.14.img /var/lib/libvirt/images/
virsh define FloppyFW.xml

步驟6.建立一支.xml檔

內容為

<domain type='kvm'>

  <name>FloppyFW</name>

  <memory>131072</memory>

  <currentMemory>131072</currentMemory>

  <vcpu>1</vcpu>

  <os>

    <type arch='i686' machine='pc-0.12'>hvm</type>

    <boot dev='fd'/>

  </os>

  <features>

    <acpi/>

    <apic/>

    <pae/>

  </features>

  <clock offset='utc'/>

  <on_poweroff>destroy</on_poweroff>

  <on_reboot>restart</on_reboot>

  <on_crash>restart</on_crash>

  <devices>

    <emulator>/usr/bin/kvm</emulator>

    <disk type='file' device='floppy'>

      <driver name='qemu' type='raw'/>

      <source file='/var/lib/libvirt/images/floppyfw-3.0.14.img'/>

      <target dev='fda' bus='fdc'/>

    </disk>

    <interface type='network'>

      <mac address='52:54:00:db:92:77'/>

      <source network='default'/>

      <target dev='vnet0'/>

    </interface>

    <console type='pty'>

      <target port='0'/>

    </console>

    <console type='pty'>

      <target port='0'/>

    </console>

    <input type='mouse' bus='ps2'/>

    <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'/>

    <video>

      <model type='cirrus' vram='9216' heads='1'/>

    </video>

  </devices>

</domain>

*注意！ name不能重複、mac address不能重複