python中有类似snapshot的功能吗

python中有类似snapshot的功能吗

#!/usr/bin/env python
#-*-coding:utf8-*-
#实时监控snapshot 状态，如果网络 出现异常，直接重置snapshot 状态～
“”
创建snapshot 盘
qemu-img create -b root.img -f qcow2 root.qcow2
snapshot 创建
virtsh snapshot-create-as vm200001 vm200012
snapshot 重置
virsh snapshot-revert vm200001 vm2000012
”“

import socket
import os,sys,time
import shutil

class Revert(object):
def __init__ (self):
pass

def log(self,info):
files = open('/var/log/listen.log','a')
try:
files.write(info)
except IOError:
files.close()
files.close()
size = os.path.getsize('/var/log/listen.log') / 1024
if size >= 1024:
shutil.move('/var/log/listen.log','/dev/null')

def mysock(self):
while True:
asock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
asock.settimeout(10)
try:
asock.connect(('192.168.10.130',22))
asock.close()
time.sleep(3)
self.log('%s:--: connect done /n'%(time.ctime()))
except socket.timeout,e:
self.log('%s:--: connect false:%s /n'%(time.ctime(),e))
os.system('virsh snapshot-revert vm200001 vm2000012')

if __name__ == "__main__":
pid = os.fork()
if pid > 0 :
sys.exit(0)
os.setsid()
os.chdir('/')
sys.stdin = open("/dev/null","r+")
sys.stdout = os.dup(sys.stdin.fileno())
sys.stderr = os.dup(sys.stdin.fileno())
reset = Revert()
reset.mysock()