Python定时执行脚本

royfans 2021-11-05 原文

最近测试hbase，老发现服务挂掉，自己不能及时发现，想了想，写了个脚本，让脚本每个小时执行一次，以便检测是否有服务挂掉，如果有服务挂掉，及时启动

import os
import datetime
class CheckService(object):

    def __init__(self):
        pass
　　
    def getService(self):
        # service list
        service = [\'Jps\'
                ,\'EmbeddedServer\'
                ,\'QuorumPeerMain\'
                ,\'NodeManager\'
                ,\'ResourceManager\'
                ,\'NameNode\'
                ,\'SecondaryNameNode\'
                ,\'HMaster\'
                ,\'HRegionServer\'
                ,\'RunJar\'

                ]
        # Traversal list
        for i in service:
            a = "jps | awk \'{print $2}\'|grep "+i
            res = os.system(a)
            # Determine whether the service is running
            if res != 0 :
                print "%s is not running!" %(i)
                if i == \'HMaster\':
                    os.system(\'start-hbase.sh\')
                elif i == \'HRegionServer\':
                    os.system(\'local-regionservers.sh start 1\')
                elif i == \'EmbeddedServer\':
                    os.system(\'ranger-admin start\')
                elif i == \'QuorumPeerMain\':
                    os.system(\'zkServer.sh start\')
                    else:
                    print \'restart Hadoop !!!\'

    def timerFun(self,sched_Timer):
        flag = 0
        while True:
            now = datetime.datetime.now()
            if now == sched_Timer:
                self.getService()
                flag = 1
　　　　　　　　　
            else:
                if flag == 1:
                    sched_Timer = sched_Timer + datetime.timedelta(hours=1)
                    flag = 0


if __name__ == "__main__":
    cs = CheckService()
    sched_Timer = datetime.datetime(2017,7,25,9,14)
    print \'run the timer task at {0}\'.format(sched_Timer)
    cs.timerFun(sched_Timer)