这个是python脚本，默认对tomcat日志保存15天，我们自己可以手动修改的

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import os,datetime,shutil,time

logRootPath = "/data/webservers"
backupRootPath = "/data/logs/backup/tomcat"
delNDayBefore = 15

def getYestoday():
    now = datetime.datetime.now()
    delta = datetime.timedelta(days=-1)
    yestoday = now + delta
    yestodayStr = yestoday.strftime('%Y%m%d')
    return yestodayStr

def createDir(path):
    if not os.path.exists(path):
        os.makedirs(path)

def backupLog():
    for path in os.listdir(logRootPath):
        logPath = os.path.join(os.path.join(logRootPath, path), "logs")
        backupPath = os.path.join(backupRootPath, path)
        logFilePath = os.path.join(logPath, "catalina.out")
        targetFileName = "catalina.out." + getYestoday()
        targetFilePath = os.path.join(backupPath, targetFileName)
        createDir(backupPath)
        shutil.copy(logFilePath,targetFilePath)
        os.system("echo '' > %s" % (logFilePath))

def getNDayTime(n):
    currTime = time.time()
    deltTime = 3600*24*n # n天前
    return currTime - deltTime

def delLog():
    fileInfos = os.walk(backupRootPath)
    beforeTime = getNDayTime(delNDayBefore)
    for path,d,filelist in fileInfos:
        for filename in filelist:
            filePath = os.path.join(path, filename)
            modifyTime = os.stat(filePath).st_mtime
            print(filePath,":",modifyTime,"-",beforeTime,"-",modifyTime < beforeTime)
            if modifyTime < beforeTime:
                print("remove file %s" % (filePath))
                os.remove(filePath)


def do():
    backupLog()
    delLog()

if __name__ == "__main__":
    do()