通过Shell、Python脚本管理KVM虚拟机

一个想法：1 python2.72 python的web框架 bottle3 shell脚本管理kvm组合在一起就可以了~这段时间我会用bottle 简单的实现管理kvm 主机,开源出去的~ 性能烂的话，别怪我~管理kvm主机完全可以在页面上完成，国外有个人用django写了这套程序，感觉还不错，只是稍复杂，bug有点多。。。。个人觉得自己开写一套简单的，python本身有kvm的库，大家要是觉得麻烦的话，也可以用os模块，调用virsh的命令来管理kvm主机，这完全是可行的~https://www.webvirtmgr.net/docs/上面是安装配置的教程安装好需要的库之后，直接运行就好了./manage.py runserver 10.96.60.61:8000 也可以利用这个小脚本，针对虚拟机开机，关机，重启~用法:

查看虚拟机列表~
# kvmctl.sh --list
machine1
machine2
machineN
开启虚拟机
# kvmctl.sh machine2 startd
Starting up "machine2" ... （daemon mode）
虚拟机状态
# kvmctl.sh --show
MACHINE PID STIME TIME
machine1 4856 Feb11 10:34:59
machine2 11155 Mar12 00:05:45
关闭虚拟机
# kvmctl.sh machine1 stop
Shutting down "machine1" ...

Config file example:KVM_M=1GKVM_HDA=$BASEDIR/$MACHINE/root.qcow2KVM_HDB=$BASEDIR/$MACHINE/swap.qcow2KVM_HDC=$BASEDIR/.imgs/mysql.rawKVM_HDD=$BASEDIR/.imgs/tmp.qcow2KVM_NET="nic,macaddr=52:54:00:00:02:52 -net tap"KVM_PIDFILE=/var/run/192.168.0.249.pidKVM_TCP_PORT=10000KVM_MONITOR="tcp:127.0.0.1:${KVM_TCP_PORT},server,nowait"KVM_EXTRA=

#！/bin/bash
BASEDIR="/var/local/kvm"
KVM="/usr/bin/kvm"
KVM_CONFIG="settings.cfg"
do_help（）
{
PROGRAM_NAME=`basename $0`
echo "Usage:"
echo "$PROGRAM_NAME machine （start|startd|stop|monitor|status|settings|edit）"
echo "$PROGRAM_NAME （--help|--list|--show）"
}
if [ $# -eq 0 ]; then
do_help
exit 1
fi
if [ "$1" == "--help" ]; then
do_help
exit 0
fi
if [ "$1" == "--list" ]; then
ls -1 $BASEDIR
exit 0
fi
if [ "$1" == "--show" ]; then
ps -ef | awk -v format="%-19s %-7s %-7s %s " "
BEGIN {
printf（format,"MACHINE", "PID", "STIME", "TIME"）
}
/kvm -name/&&！/awk/ {
printf（format, $10, $2, $5, $7）
}"
exit 0
fi
MACHINE=$1
MACHINEDIR=$BASEDIR/$MACHINE
if [ ！ -d $MACHINEDIR ]; then
echo -e "Error. （Machine not found at $BASEDIR/） "
do_help
exit 1
fi
do_load_settings（）
{
if [ -f "$MACHINEDIR/$KVM_CONFIG" ]; then
source $MACHINEDIR/$KVM_CONFIG
else
echo -e "Error. （$MACHINEDIR/$KVM_CONFIG not found） "
echo "Example $KVM_CONFIG:"
echo "KVM_M=512M"
echo "KVM_HDA=$BASEDIR/$MACHINE/root.qcow2"
echo "KVM_HDB=$BASEDIR/.imgs/swap.qcow2"
echo "KVM_HDC=$BASEDIR/.imgs/home.qcow2"
echo "KVM_HDD="
echo "KVM_NET="nic,macaddr=52:54:00:00:02:53 -net tap""
echo "KVM_TCP_PORT=10001"
echo "KVM_PIDFILE=/var/run/192.168.0.253.pid"
echo "KVM_MONITOR="tcp:127.0.0.1:${KVM_TCP_PORT},server,nowait""
echo "KVM_EXTRA="
exit 1
fi
}
do_check_tcp_port（）
{
if [ -z "$1" ]; then
echo "Error. （KVM_TCP_PORT is not set）"
exit 1
fi
}
case "$2"in
start|startd）
do_load_settings
PARAMS="-name $MACHINE"
[ "$2" == "startd" ]
&& PARAMS="$PARAMS -vnc none -daemonize"
&& MSG="（daemon mode）"
[ -n "$KVM_M" ] && PARAMS="$PARAMS -m $KVM_M"
[ -n "$KVM_HDA" ] && PARAMS="$PARAMS -hda $KVM_HDA"
[ -n "$KVM_HDB" ] && PARAMS="$PARAMS -hdb $KVM_HDB"
[ -n "$KVM_HDC" ] && PARAMS="$PARAMS -hdc $KVM_HDC"
[ -n "$KVM_HDD" ] && PARAMS="$PARAMS -hdd $KVM_HDD"
[ -n "$KVM_NET" ] && PARAMS="$PARAMS -net $KVM_NET"
[ -n "$KVM_PIDFILE" ] && PARAMS="$PARAMS -pidfile $KVM_PIDFILE"
[ -n "$KVM_MONITOR" ] && PARAMS="$PARAMS -monitor $KVM_MONITOR"
[ -n "$KVM_EXTRA" ] && PARAMS="$PARAMS $KVM_EXTRA"
echo "Starting up "$MACHINE" ... $MSG"
$KVM $PARAMS
[ $？ -ne 0 ]
&& echo "Error. （Couldn"t run KVM）"
;;
stop）
do_load_settings
do_check_tcp_port $KVM_TCP_PORT
echo "Shutting down "$MACHINE" ..."
echo "system_powerdown" | nc 127.0.0.1 $KVM_TCP_PORT &>/dev/null
if [ $？ -ne 0 ]; then
echo "Error. （Couldn"t connect. Is the machine up？）"
exit 1
fi
;;
monitor）
do_load_settings
do_check_tcp_port $KVM_TCP_PORT
echo "Starting Monitor for "$MACHINE"... （Ctrl+C to exit）"
nc 127.0.0.1 $KVM_TCP_PORT
;;
status）
do_load_settings
do_check_tcp_port $KVM_TCP_PORT
INFO="info status info kvm info network"
echo -e $INFO | nc -w 1127.0.0.1 $KVM_TCP_PORT
&& echo ""
if [ $？ -ne 0 ]; then
echo "Error. （Couldn"t connect. Is the machine up？）"
exit 1
fi
;;
settings）
do_load_settings
cat $MACHINEDIR/$KVM_CONFIG
;;
edit）
if [ -z "$EDITOR" ]; then
echo "Error. （EDITOR is not set）"
exit 1
fi
do_load_settings
if [ -n "$KVM_PIDFILE" -a -f "$KVM_PIDFILE" ]; then
echo -n "Warning！ "$MACHINE" is running. Continue？（y/N） "
read CONTINUE
[ "$CONTINUE" ！= "y" -a "$CONTINUE" ！= "Y" ]
&& exit 1
fi
$EDITOR $MACHINEDIR/$KVM_CONFIG
;;
*）
do_help
exit 1
;;
esac
exit 0

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