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#!/usr/bin/env python2 """ This script checks the output of the local 'df -P' command and reports the disk usage for the given mount with perfdata. Usage: python check_df_usage.py OK /dev/mapper/centos-root filesystem mounted on / usage percentage is 17 ; \| 'used_percentage'=17;90;95;; 'size'=14530560KB;;;; 'used'=2360596KB;;;; 'available'=12169964KB;;;; python check_df_usage.py --mount '/boot' --warn_usage 20 --crit_usage 30 CRITICAL /dev/sda1 filesystem mounted on /boot usage percentage is 34 ; \| 'used_percentage'=34;20;30;; 'size'=508588KB;;;; 'used'=168196KB;;;; 'available'=340392KB;;;; Requires: NagPy library (https://github.com/rendicott/nagpy) """ import logging import sys import inspect import gc import os import nagpyrc import subprocess import re from nagpyrc import NagiosReturn from nagpyrc import PerfChunk from nagpyrc import NagiosReturnCode from optparse import OptionParser, OptionGroup sversion = 'v0.1' scriptfilename = os.path.basename(sys.argv[0]) defaultlogfilename = scriptfilename + '.log' PY3K = sys.version_info >= (3, 0) def setuplogging(loglevel,printtostdout,logfile): #pretty self explanatory. Takes options and sets up logging. #print("starting up with loglevel",loglevel,logging.getLevelName(loglevel)) logging.basicConfig(filename=logfile, filemode='w',level=loglevel, format='%(asctime)s:%(levelname)s:%(message)s') if printtostdout: soh = logging.StreamHandler(sys.stdout) soh.setLevel(loglevel) logger = logging.getLogger() logger.addHandler(soh) def is_number(s): try: float(s) return True except ValueError: return False def execute_command(commandstring): try: output = subprocess.Popen(commandstring,stdout=subprocess.PIPE) return(output) except Exception as e: msg = "Exception calling command: '%s' , Exception: %s" % (commandstring,str(e)) logging.debug(msg) return(msg) class Mount: def __init__(self): self.filesystem = '' self.size = '' self.used = '' self.avail = '' self.usep = '' self.mount = '' def dumpself(self): fmt = '{0:50}{1:10}{2:10}{3:10}{4:5}{5:50}' return(fmt.format(self.filesystem,self.size,self.used,self.avail,self.usep,self.mount)) def parse_size(stringer): unit = '' value = '' #r1 = re.compile('(?P<value>\d)(?P<unit>\w)') # ^^ py2 does not give error, but it should, and below should be used on both py2 & py3 r1 = re.compile('(?P<value>\\d)(?P<unit>\\w)') match = re.search(r1,stringer) if match: unit = match.group('unit') value = match.group('value') if unit == '': unit = 'KB' #return("VALUE: '%s', UNIT: '%s'" % (value,unit)) return(unit, value) def main(options): ''' The main() method. Program starts here. ''' output = execute_command(['/bin/df','-i']) mounts = [] try: for line in output.stdout: if not PY3K: chunked = [x.replace('\n','') for x in line.split(' ') if x != ''] else: chunked = [x.replace('\n','') for x in line.decode('utf-8', 'backslashreplace').split(' ') if x != ''] m = Mount() m.filesystem = chunked[0] m.size = chunked[1] m.used = chunked[2] m.avail = chunked[3] m.usep = chunked[4].replace('%','') m.mount = chunked[5] mounts.append(m) selected_mount = None for mount in mounts: if mount.mount == options.mount: selected_mount = mount except Exception as e: msg = "Exception processing output from 'df -i' command: " + str(e) logging.debug(msg) print(msg) sys.exit(1) #print('WHOLE::::::::::::::' + selected_mount.dumpself()) error = False try: pc_usage = PerfChunk(stringname='used_percentage',value=selected_mount.usep) pc_usage.warn = str(options.warn_usage) pc_usage.crit = str(options.crit_usage) except: pc_usage = PerfChunk(stringname='used_percentage',value='100') error = True pc_usage.warn = str(options.warn_usage) pc_usage.crit = str(options.crit_usage) if error: nrc = 2 elif int(selected_mount.usep) >= int(options.crit_usage): nrc = 2 elif int(selected_mount.usep) >= int(options.warn_usage): nrc = 1 else: nrc = 0 # build your nagios message and tell it to be warn,crit,ok, etc. # nrc = 1 # WARNING # nrc = 2 # CRITICAL if error: msg = 'error mount unknown' else: msg = '%s usage percentage is %s' % (selected_mount.mount, selected_mount.usep) nm = NagiosReturnCode(returncode=nrc,msgstring=msg) # append the primary performance counter that we care about nm.perfChunkList.append(pc_usage) # build additional performance metrics #print('SIZE:::::' + parse_size(selected_mount.size)) #print('USED:::::' + parse_size(selected_mount.used)) #print('AVAIL:::::' + parse_size(selected_mount.avail)) try: (unit, value) = parse_size(selected_mount.size) pc_size = PerfChunk(stringname='size', value=value, unit=unit) nm.perfChunkList.append(pc_size) except Exception as r: logging.debug("EXCEPTION size: " + str(r)) try: (unit, value) = parse_size(selected_mount.used) pc_used = PerfChunk(stringname='used', value=value, unit=unit) nm.perfChunkList.append(pc_used) except Exception as r: logging.debug("EXCEPTION used: " + str(r)) try: (unit, value) = parse_size(selected_mount.avail) pc_avail = PerfChunk(stringname='available', value=value, unit=unit) nm.perfChunkList.append(pc_avail) except Exception as r: logging.debug("EXCEPTION avail: " + str(r)) nm.genreturncode() # will raise a 'NagiosReturn' exception which is normal if __name__ == '__main__': '''This main section is mostly for parsing arguments to the script and setting up debugging''' from optparse import OptionParser '''set up an additional option group just for debugging parameters''' from optparse import OptionGroup usage = ("%prog [--debug] [--printtostdout] [--logfile] [--version] [--help] [--samplefileoption]") #set up the parser object parser = OptionParser(usage, version='%prog ' + sversion) parser.add_option('--warn_usage', type='string', help=("Warning level for disk usage percentage (Default=90)"),default=90) parser.add_option('--crit_usage', type='string', help=("Critical level for disk usage percentage (Default=95"),default=95) parser.add_option('--mount', type='string', help="If this option is present then only statistics for the specific " + "mount will be parsed. Default behavior is to return stats for " + "just root e.g., '/'. (Default='/')", default='/') parser_debug = OptionGroup(parser,'Debug Options') parser_debug.add_option('-d','--debug',type='string', help=('Available levels are CRITICAL (3), ERROR (2), ' 'WARNING (1), INFO (0), DEBUG (-1)'), default='CRITICAL') parser_debug.add_option('-p','--printtostdout',action='store_true', default=False,help='Print all log messages to stdout') parser_debug.add_option('-l','--logfile',type='string',metavar='FILE', help=('Desired filename of log file output. Default ' 'is "'+ defaultlogfilename +'"') ,default=defaultlogfilename) #officially adds the debuggin option group parser.add_option_group(parser_debug) options,args = parser.parse_args() #here's where the options get parsed try: #now try and get the debugging options loglevel = getattr(logging,options.debug) except AttributeError: #set the log level loglevel = {3:logging.CRITICAL, 2:logging.ERROR, 1:logging.WARNING, 0:logging.INFO, -1:logging.DEBUG, }[int(options.debug)] try: open(options.logfile,'w') #try and open the default log file except: logging.debug("Unable to open log file '%s' for writing." % options.logfile) logging.debug( "Unable to open log file '%s' for writing." % options.logfile) setuplogging(loglevel,options.printtostdout,options.logfile) try: main(options) except NagiosReturn as e: print(e.message) sys.exit(e.code)

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