自动化脚本管理kvm

#!/bin/bash
#kvm batch create vm tool
#version:0.1
#author:name
#需要事先准备模板镜像和配置文件模板

echo "1.创建自定义配置单个虚拟机
2.批量创建自定义配置虚拟机
3.批量创建默认配置虚拟机

read -p "选取你的操作(1/2/3):" op

batch_self_define() {

        kvmname=`openssl rand -hex 5`

        sourceimage=/var/lib/libvirt/images/vmmodel.img
        sourcexml=/etc/libvirt/qemu/vmmodel.xml

        newimg=/var/lib/libvirt/images/${kvmname}.img
        newxml=/etc/libvirt/qemu/${kvmname}.xml

        cp $sourceimage  $newimg
        cp $sourcexml $newxml

        kvmuuid=`uuidgen`
        kvmmem=${1}000000
        kvmcpu=$2
        
        
        kvmimg=$newimg
        kvmmac=`openssl rand -hex 3 | sed -r 's/..\B/&:/g'`

        sed -i "s@kvmname@$kvmname@;s@kvmuuid@$kvmuuid@;s@kvmmem@$kvmmem@;s@kvmcpu@$kvmcpu@;s@kvmimg@$kvmimg@;s@kvmmac@$kvmmac@" $newxml
        virsh define $newxml
        virsh list --all
}
self_define() {
        read -p "请输入新虚机名称:" newname
        read -p "请输入新虚机内存大小(G):" newmem
        read -p "请输入新虚机cpu个数:" newcpu

        sourceimage=/var/lib/libvirt/images/vmmodel.img
        sourcexml=/etc/libvirt/qemu/vmmodel.xml

        newimg=/var/lib/libvirt/images/${newname}.img
        newxml=/etc/libvirt/qemu/${newname}.xml

        cp $sourceimage  $newimg
        cp $sourcexml $newxml

        kvmname=$newname
        kvmuuid=`uuidgen`
        kvmmem=${newmem}000000
        kvmcpu=$newcpu
        kvmimg=$newimg
        kvmmac=`openssl rand -hex 3 | sed -r 's/..\B/&:/g'`

        sed -i "s@kvmname@$kvmname@;s@kvmuuid@$kvmuuid@;s@kvmmem@$kvmmem@;s@kvmcpu@$kvmcpu@;s@kvmimg@$kvmimg@;s@kvmmac@$kvmmac@" $newxml
        virsh define $newxml
        virsh list --all
}

case $op in
1)self_define;;
2)
        read -p "请输入要创建的虚拟机的个数:" num
        read -p "请输入新虚机内存大小(G):" newmem
        read -p "请输入新虚机cpu个数:" newcpu

        for((i=1;i<=$num;i++))
        do
                batch_self_define $newmem $newcpu
        done;;

3)
        read -p "请输入要创建的虚拟机的个数:" num

        for((i=1;i<=$num;i++))
        do
                batch_self_define 1 1
        done;;

*)echo "输入错误，请重新执行脚本"
  exit;;
esac

配置文件模板 ?

# vim /etc/libvirt/qemu/vmmodel.xml
<domain type='kvm'>
  <name>kvmname</name>
  <uuid>kvmuuid</uuid>
  <memory unit='KiB'>kvmmem</memory>
  <currentMemory unit='KiB'>kvmmem</currentMemory>
  <vcpu placement='static'>kvmcpu</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='custom' match='exact' check='partial'>
    <model fallback='allow'>Haswell-noTSX</model>
  </cpu>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='kvmimg'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </controller>
    <interface type='network'>
      <mac address='52:54:00:kvmmac'/>
      <source network='default'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <channel type='unix'>
      <target type='virtio' name='org.qemu.guest_agent.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </memballoon>
  </devices>
</domain>