python更新tomcat脚本

#!/usr/bin/env python
# _*_ coding:UTF-8 _*_
import commands
import time,os,sys
from download_bag import downloadbag

tomcat_home = '/usr/local/apache-tomcat-7.0.42/'
webapp_name = 'front'
update_dir = "/home/deployer/update/"
backup_home = '/home/deployer/backup_war'
uptime = time.strftime('%Y%m%d',time.localtime(time.time()))
backup_time = time.strftime('%Y%m%d_%H%M',time.localtime(time.time()))

#关闭tomcat
def shutdown():
    print "准备关闭tomcat......"
    status,output=commands.getstatusoutput('ps -ef|grep -i '+tomcat_home+'|wc -l')
    if(int(output)>2): #判断是否有tomcat进程
        print "    开始关闭tomcat"
        status,output=commands.getstatusoutput(tomcat_home+'bin/shutdown.sh')
        if(status!=0):
            print output
            sys.exit(1)
        time.sleep(0.5) #关闭程序缓存时间
        status,output=commands.getstatusoutput('ps -ef|grep -i '+tomcat_home+'|wc -l')
        if(int(output)>2): #判断是否关闭成功
            print "    强制关闭tomcat"
            status,output=commands.getstatusoutput('kill -9 `ps -ef|grep -i '+tomcat_home+' |awk \'NR==1{print $2}\'`')
            if(status!=0):
                print output
                sys.exit(1)
        print "    已关闭tomcat"
        return 0
    print "    tomcat未启动"

#备份tomcat
def backup():
    print "开始备份......"
    #判断今日备份目录是否存在，不存在则创建
    if(not os.path.exists(backup_home+'/'+webapp_name+'/'+backup_time)):
        status,output=commands.getstatusoutput('mkdir -p '+backup_home+'/'+webapp_name+'/'+backup_time)
        if(status!=0):
            print output
            sys.exit(1)
#    #备份当前版本，备份前先判断目录是否是空的
    if(len(os.listdir(tomcat_home+'webapps/'))>0):
        status,output=commands.getstatusoutput('mv '+tomcat_home+'webapps/* '+backup_home+'/'+webapp_name+'/'+backup_time)
        if(status!=0):
            print output
            sys.exit(1)
    print '    备份成功'


from download_bag import downloadbag
#部署新程序
def update():
    print "开始部署....."
    #部署新war包到tomcat里
    status,output=commands.getstatusoutput('cp -rf '+update_dir+uptime+'/'+webapp_name + '.war ' + tomcat_home+'webapps/')
    if(status!=0):
        print output
        sys.exit(1)
    #启动tomcat
    status,output=commands.getstatusoutput(tomcat_home+'bin/startup.sh')
    print output

if __name__ == '__main__':
       if os.geteuid() == 0:
            print '''
                  ***************************************************************************
                  **********  hi,hi,hi.......请注意                             ***************
                  *********  不能用root账号，请使用deployer账号，现在正在退出' ***************
                  *********  exit now                                                 ********
                  '''
            sys.exit(1)
       else:
            downloadbag()
            shutdown()
            backup()
            update()