check_hadoop_tasktracker.py

'''Created on 2011-11-25@author: yue.zhang'''#!/usr/bin/env pythonimport commandsimport sysfrom optparse import OptionParserimport urllibimport redef get_value():    urlItem = urllib.urlopen("http://182.61.128.18:50030/jobtracker.jsp")    html = urlItem.read()    urlItem.close()    return float(re.findall('.+<a href="machines.jsp\?type=active">(\d+)</a>.+', html)[0])if __name__ == '__main__':    parser = OptionParser(usage="%prog [-w] [-c]", version="%prog 1.0")    parser.add_option("-w", "--warning", type="int", dest="w", default=18)    parser.add_option("-c", "--critical", type="int", dest="c", default=15)    (options, args) = parser.parse_args()    if(options.c >= options.w):        print '-w must greater then -c'        sys.exit(1)    value = get_value()    if(value <= options.c ) :print 'CRITICAL - Live Tasktracker %d' %(value)        sys.exit(2)    elif(value <= options.w):        print 'WARNING - Live Tasktracker %d' %(value)sys.exit(1)    else:           print 'OK - Live Tasktracker %d' %(value) sys.exit(0)