Nagios-plugin (MEM)

#!/usr/bin/env pythonimport sysfrom optparse import optionparserimport stringok= 0warning=1critical=2unknown=3unit = {' t ': 2**40, ' G ': 2**30, ' m ': 2**20, ' K ': 2**10, ' B ': 1}def opt ():     parser = optionparser (usage= "usage: %prog -w warning -c  critical ")     parser.add_option ("-C ",  default=" 100M ",  action=" store ",  type= "string",  dest= "critical")     parser.add_option ("-W",  default= "500M",  action= "Store",  type= "string",  dest= "warning")     return parser.parse _args () Def convertunit (s):     s = s.lower ()     lastchar  = s[-1]    num = int (S[:-1])     if lastchar  in unit:        return num*unit[lastchar]     else:&nbSp;       return int (s) def scaleunit (d):     For k,v in unit.items ():        num = d  / float (v)         if  (0 < num < 2* *10):            return num,kdef  Getfreememory ():     with open ('/proc/meminfo ', ' R ')  as fd:         for line in fd.readlines ():             if line.startswith (' Memfree '):                 k, v, u =  line.split ()                 return  Int (v) *1024def main ():    opts, args = opt ()     w = convertunit ( opts.warning)     c = convertunit (opts.critical)     free_mem  =  getfreememory ()         h_free, h_unit =  scaleunit (FREE_MEM)     if free_mem > w:         print  "ok, free:%s %s"  %   (h_free, h_unit)          sys.exit (OK)     elif w >= free _mem > c:        print  "WARNING, free: %s  %s " %  (h_free, h_unit)         sys.exit (WARNING)     elif free_mem <= c:         print  "critical,  free: %s %s " %  (h_free, h_unit)          Sys.exit (CRITICAL)     else:        print  " unknonw, free:%s %s " %   (h_free, h_unit)          sys.exit (UNKNOWN) if __name__ ==  "__main__":     main ()

This article from "Muzinan Technology blog" blog, declined reprint!

Nagios-plugin (MEM)