通过Shell、Python脚本管理KVM虚拟机

引用:

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=1G
KVM_HDA=$BASEDIR/$MACHINE/root.qcow2
KVM_HDB=$BASEDIR/$MACHINE/swap.qcow2
KVM_HDC=$BASEDIR/.imgs/mysql.raw
KVM_HDD=$BASEDIR/.imgs/tmp.qcow2
KVM_NET="nic,macaddr=52:54:00:00:02:52 -net tap"
KVM_PIDFILE=/var/run/192.168.0.249.pid
KVM_TCP_PORT=10000
KVM_MONITOR="tcp:127.0.0.1:${KVM_TCP_PORT},server,nowait"

KVM_EXTRA=

引用:

#!/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\n" '\
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 $BASEDIR/)\n"
do_help
exit 1
fi
do_load_settings()
{
if [ -f "$MACHINEDIR/$KVM_CONFIG" ]; then
source $MACHINEDIR/$KVM_CONFIG
else
echo -e "Error. ($MACHINEDIR/$KVM_CONFIG not found)\n"
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\ninfo kvm\ninfo 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