This utiilty helps to find metrics in graphite whisper format that haven't been updated in a preset number of days

find_stale_metrics.py

#!/usr/bin/python

import optparse # argparse not available since most systems still have python 2.6 (argparse is in 2.7)
import os
import sys
import time

# helper function to return the parent dir given a dir
parent_of = lambda p: os.path.sep.join( p.split( os.path.sep )[:-1] )

def main():
    parser = optparse.OptionParser(usage='%prog [-d <whisper-dir>] [-a age-in-days]')
    parser.add_option('-d', action='store', dest='dir', default='/opt/graphite/storage/whisper', \
            help='which directory to search from')
    parser.add_option('-a', action='store', dest='age', default=30, type='int', \
            help='min staleness age (in days) to report')
    parser.add_option('-m', action='store', dest='metric', \
            help='optional pattern to limit search of stale metrics to')
    opts,args = parser.parse_args()

    if not os.path.exists(opts.dir):
        print parser.error('Directory {0} does not exist!'.format(opts.dir))
        return 1
    elif not os.access(opts.dir, os.R_OK):
        print parser.error('Directory {0} not readable!'.format(opts.dir))
        return 1

    opts.dir += os.path.sep if not opts.dir.endswith( os.path.sep ) else ''
    t = time.time()      # current seconds since epoch
    a = opts.age * 86400 # age in seconds

    walker        = os.walk(opts.dir, topdown=False)      # get generator object, work depth-first
    paths_walked  = list(walker)                          # consume returned generator

    is_old = dict((p, True) for p,_,_ in paths_walked)    # assume they are all old unless we see otherwise
    for this_dir,any_dirs,any_files in paths_walked:
        if any_files:
            is_old[this_dir] = False if any( t - os.stat( os.path.join(this_dir, this_file) ).st_mtime < a for this_file in any_files ) else True
        elif any_dirs:
            is_old[this_dir] = False if any( not is_old[ os.path.join(this_dir, d) ] for d in any_dirs ) else True

    print '\n'.join(sorted([ p.replace(opts.dir,'') for p,_,_ in paths_walked if is_old[ p ] and parent_of(p) in is_old and not is_old[ parent_of(p) ] ]))
    return 0 # successful return code

if __name__ == '__main__':
    sys.exit(main())