kvm 建立虛擬機腳本（centos7）

#!/bin/bash
#建立單個虛擬機（須要電腦中存在模板虛擬機）

#獲取新虛擬機名稱（單個建立模式）
get_newname(){
    while true
        do
                read -p "請輸入新虛擬機名稱：" newname
                if [ $newname ];then
                        break
                else
                        echo "************"
                        echo "請輸入姓名！"
                        echo "************"
                fi
        done
}
get_newmemary(){
    while true
        do
                current_free_mem=`free -h|awk '/^Mem/{print $4}'|sed  -r 's/(.*).$/\1/'`
                mem_total=`free -h|awk '/^Mem/{print $2}'|sed  -r 's/(.*).$/\1/'`
                echo "目前本機內存總大小：${mem_total} G"
                echo "當前空閒內存大小爲：${current_free_mem} MB"
                read -p "請輸入新虛擬機內存大小(單位G)：" newmemary
                if [ $newmemary ];then
                        if [[ $newmemary < $mem_total ]];then
                                break
                        else
                                echo "**********************************"
                                echo "輸入的數值必須小於當前內存總大小！"
                                echo "**********************************"
                        fi
                else
                        echo "********************"
                        echo "請輸入新虛擬機內存！"
                        echo "********************"
                fi
        done
}
get_newcpu(){
    while true
        do
                core=`cat /proc/cpuinfo| grep "processor"| wc -l`
                echo "可用core個數：${core}"
                read -p "請輸入新虛擬機處理器核數：" newcpu
                if [ $newcpu ];then
                        if [ $newcpu -le $core ];then
                                break
                        else
                                echo "******************************"
                                echo "不能超過可用個數或者輸入錯誤！"
                                echo "******************************"
                        fi
                else
                        echo "**************"
                        echo "輸入不能爲空！"
                        echo "**************"
                fi
        done
}
#設置虛擬機名稱（自定義建立多個虛擬機）
set_group_name(){
    #虛擬機個數
        read -p "新虛擬機個數：" vir_num
        free_vir=$vir_num
        #功能分組
        echo "**********************************************************************************"
        echo "設置好組名以後，虛擬機將每組下的虛擬機自動用【組名0一、組名0一、組名0三、...】的形式命名"
        echo "**********************************************************************************"
        read -p "須要分幾種功能類型(大於1)：" vir_type
        if [ ${vir_type} -gt ${vir_num} ];then
                echo "輸入不符合規則！"
                exit
        fi
        #設置名字,組名+數字
        k=1
        for((i=1;i<=${vir_type};i++))
        do
                read -p "第${i}組組名：" group[$i]
                read -p "分配新虛擬機個數:" group_num_vir
                #檢測輸入
                free_vir=$((${free_vir}-${group_num_vir}))
                if [ ${group_num_vir} -gt ${vir_num} ];then
                        echo "輸入錯誤，超過自定義虛擬機個數！"
                        exit
                elif [ ${free_vir} -lt $((${vir_type}-${i})) ];then
                        echo "分配不均,請從新分配！"
                        exit
                fi
                #記錄組內虛擬機個數
                for((j=1;j<=${group_num_vir};j++))
                do
                        name_n="${group[$i]}${j}"
                        name[${k}]=${name_n}
                        k=$(($k+1))
                done
        done
    echo "準備建立以下虛擬機："
        for((i=1;i<=${vir_num};i++))
        do
                echo ${name[${i}]}
        done    
}
#設置xml所需參數
set_xml_args_single(){
    uuid=`uuidgen`
        src_path=/mnt/lv2/centos7.0.qcow2
        src_xml=/etc/libvirt/qemu/centos7.0.xml
        new_path=/mnt/lv1/${newname}.qcow2
        new_path_sed="\/mnt\/lv1\/${newname}.qcow2"
        new_xml=/etc/libvirt/qemu/${newname}.xml
}
#設置xml所需參數(多個)，例如：【set_xml_args ${name[${i}]} $new_memary $new_cpu】
set_xml_args(){
    newname=$1
        newmemary=$2
        newcpu=$3
    uuid=`uuidgen`
        src_path=/mnt/lv2/centos7.0.qcow2
        src_xml=/etc/libvirt/qemu/centos7.0.xml
        new_path=/mnt/lv1/${newname}.qcow2
        new_path_sed="\/mnt\/lv1\/${newname}.qcow2"
        new_xml=/etc/libvirt/qemu/${newname}.xml
}
#複製模板、xml
copy_model_xml(){
    cp $src_path $new_path
        cp $src_xml $new_xml
}
#修改xml文件
modification_xml(){
    sed -ri "s/(<name>).*(<\/name>)/\1${newname}\2/" $new_xml
        sed -ri "s/(<uuid>).*(<\/uuid>)/\1${uuid}\2/" $new_xml
        mem_kb=$((${newmemary}*1024*1024))

        sed -ri "s/(<memory.*>).*(<\/memory>)/\1${mem_kb}\2/" $new_xml
        sed -ri "s/(<currentMemory.*>).*(<\/currentMemory>)/\1${mem_kb}\2/" $new_xml
        sed -ri "s/(<vcpu.*>).*(<\/vcpu>)/\1${newcpu}\2/" $new_xml
        sed -ri "s/(<source file=').*('\/>)/\1${new_path_sed}\2/" $new_xml

        mac_addr=`openssl rand -hex 3 | sed -r 's/..\B/&:/g'`

        sed -ri "s/(<mac address='..:..:..:).*('\/>)/\1${mac_addr}\2/" $new_xml
}
#define
define_vir_single(){
    virsh define $new_xml
    echo "**********"
    echo "${newname}建完成！"
    echo "**********"
}
#------------運行分界線------------------------------------
echo "1)single"
echo "2)group"
read -p "選擇你的操做：" str
case $str in
single)
    get_newname
    get_newmemary
    get_newcpu
    set_xml_args_single
    copy_model_xml
    modification_xml
    define_vir_single
;;
group)
    set_group_name
    get_newmemary
    get_newcpu
    for((i=1;i<=${vir_num};i++))
    do
        set_xml_args ${name[${i}]} $newmemary $newcpu
        copy_model_xml
        modification_xml
        define_vir_single
    done
;;
*)
    exit
;;
esac