1.先放个配置文件上来

# /etc/qemu.conf
# VMs that should be started on boot
# use the ! prefix to disable starting/stopping a VM
# QEMU_MACHINES=(kms)
QEMU_MACHINES=(kms)

# NOTE: following options will be prepended to qemu_${vm}
# -name ${vm} -pidfile /var/run/qemu/${vm}.pid -daemonize -nographic

qemu_kms_type="system-x86_64"

qemu_kms="-enable-kvm -hda /opt/qemu/kmsm4WOen.rom \
  -smbios type=1,manufacturer=Intel,version=1.01234,uuid=564d81c6-cd3a-d8e4-db29-756df139acb9 \
  -uuid 564d81c6-cd3a-d8e4-db29-756df139acb9 \
  -net nic -net user,hostfwd=tcp::1688-:1688 \
  -m 256 -rtc base=localtime,clock=host -M pc \
  -monitor telnet:localhost:7100,server,nowait,nodelay"
qemu_kms_haltcmd="echo 'system_powerdown' | nc localhost 7100" # or netcat/ncat

2.服务所需文件。

#!/bin/sh
# /etc/init.d/qemu

. /etc/rc.d/init.d/functions

[ -f /etc/qemu.conf ] && source /etc/qemu.conf

piddir=/var/run/qemu
lock='/var/lock/subsys/qemu-1.5rc1'
QEMU_PATH=/opt/qemu/qemu-1.5rc1
QEMU_DEFAULT_FLAGS='-name ${vm} -pidfile ${piddir}/${vm}.pid -daemonize -vga none -display none'
# -nographic
QEMU_HALTCMD_WAIT=30

case "$1" in
  start)
    [ -d "${piddir}" ] || mkdir -p "${piddir}"
    if [ -f $lock ]; then 
        # we were not shut down correctly 
        for pidf in `/bin/ls $piddir/*.pid 2>/dev/null`; do 
          if [ -s $pidf ]; then 
            kill `cat $pidf` >/dev/null 2>&1 
          fi 
          rm -f $pidf 
        done 
        rm -f $lock 
        sleep 2 
    fi 
    rm -f $piddir/*.pid 
    errors=0
    sucesses=0
    for vm in "${QEMU_MACHINES[@]}"; do
        if [ "${vm}" = "${vm#!}" ]; then
        echo -n $"Starting QEMU VM: ${vm}"
        eval vm_cmdline="\$qemu_${vm}"
        eval vm_type="\$qemu_${vm}_type"

        if [ -n "${vm_type}" ]; then
           vm_cmd="${QEMU_PATH}/bin/qemu-${vm_type}"
        else
           vm_cmd="${QEMU_PATH}/bin/qemu"
        fi

        eval "qemu_flags=\"${QEMU_DEFAULT_FLAGS}\""

        ${vm_cmd} ${qemu_flags} ${vm_cmdline} >/dev/null

        if [ $? = 0 ]; then
            successes=1
        else
            errors=1
        fi
       fi
    done
    
    if [ $errors = 1 ]; then
        failure; echo
    else
        success; echo
    fi
    if [ $successes = 1 ]; then
        touch $lock
    fi

    ;;

  stop)
    for vm in "${QEMU_MACHINES[@]}"; do
      if [ "${vm}" = "${vm#!}" ]; then
        # check pidfile presence and permissions
        if [ ! -r "${piddir}/${vm}.pid" ]; then
          continue
        fi

        echo -n $"Stopping QEMU VM: ${vm}"

        eval vm_haltcmd="\$qemu_${vm}_haltcmd"
        eval vm_haltcmd_wait="\$qemu_${vm}_haltcmd_wait"
        vm_haltcmd_wait=${vm_haltcmd_wait:-${QEMU_HALTCMD_WAIT}}
        vm_pid=$(cat ${piddir}/${vm}.pid)
  
        # check process existence
        if ! kill -0 ${vm_pid} 2>/dev/null; then
          stat_done
          rm -f "${piddir}/${vm}.pid"
          continue
        fi

        # Try to shutdown VM safely
        _vm_running='yes'
        if [ -n "${vm_haltcmd}" ]; then
          eval ${vm_haltcmd} >/dev/null

          _w=0
          while [ "${_w}" -lt "${vm_haltcmd_wait}" ]; do
            sleep 1
            if ! kill -0 ${vm_pid} 2>/dev/null; then
              # no such process
              _vm_running=''
              break
            fi
            _w=$((_w + 1))
          done

        else
          # No haltcmd - kill VM unsafely
          _vm_running='yes'
        fi

        if [ -n "${_vm_running}" ]; then
            # kill VM unsafely
            kill ${vm_pid} 2>/dev/null
            sleep 1
        fi

        # report status
        if kill -0 ${vm_pid} 2>/dev/null; then
          # VM is still alive
          #kill -9 ${vm_pid}
          failure; echo
        else
          success; echo
        fi

        # remove pidfile
        rm -f "${piddir}/${vm}.pid"
      fi
    done
    rm -f $lock
    ;;

  restart)
    $0 stop
    sleep 1
    $0 start
    ;;

  *)
    echo "usage: $0 {start|stop|restart}"

esac

PS:

# 如果你没安装过nc的话，就yum一下要么nc用不了，无法关闭服务器。
# 
yum install -y nc