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check_s3_file_age.py
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check_s3_file_age.py
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#!/usr/bin/env python
##########################################################
#
# Written by Matthew McMillan
# @matthewmcmillan
# https://matthewcmcmillan.blogspot.com
# https://github.com/matt448/nagios-checks
#
#
# This Nagios check looks at the age of files stored in an S3 bucket.
# It alerts if files haven't been uploaded within a certain time frame
# and/or alerts if files are too old.
# This script requires authentication credentials to be stored in
# the config file '~/.boto'.
#
#
# .boto file format:
#
# [Credentials]
# aws_access_key_id = ABCDEFJKJK39939
# aws_secret_access_key = 443xkdjksjkldsjfklsdjsdkjsdfkls32xkj2333
#
#
#
# -- Nagios error codes --
# 0 = OK/green
# 1 = WARNING/yellow
# 2 = CRITICAL/red
# 3 = UNKNOWN/purple
#
import ConfigParser
import os
import datetime
import dateutil.parser
from dateutil.tz import *
import time
import socket
import boto
import argparse
import re
#Parse command line arguments
parser = argparse.ArgumentParser(description='This script is a Nagios check that \
monitors the age of files that have \
been backed up to an S3 bucket.')
parser.add_argument('--bucketname', dest='bucketname', type=str, required=True,
help='Name of S3 bucket')
parser.add_argument('--minfileage', dest='minfileage', type=int, default=0,
help='Minimum age for files in an S3 bucket in hours. \
Default is 0 hours (disabled).\
')
parser.add_argument('--maxfileage', dest='maxfileage', type=int, default=0,
help='Maximum age for files in an S3 bucket in hours. \
Default is 0 hours (disabled).')
parser.add_argument('--bucketfolder', dest='bucketfolder', type=str, default='',
help='Folder to check inside bucket (optional).')
####
# Add arg option for s3 region?
###
parser.add_argument('--listfiles', action='store_true',
help='Enables listing of all files in bucket to stdout. \
Use with caution!')
parser.add_argument('--debug', action='store_true',
help='Enables debug output.')
args = parser.parse_args()
#Assign variables from command line arguments
bucketname = args.bucketname
minfileage = args.minfileage
maxfileage = args.maxfileage
bucketfolder = args.bucketfolder
bucketfolder_regex = '^' + bucketfolder
maxfilecount = 0
minfilecount = 0
totalfilecount = 0
if (args.debug):
print '########## START DEBUG OUTPUT ############'
print 'DEBUG: S3 BUCKET NAME: ' + str(bucketname)
print 'DEBUG: MIN FILE AGE: ' + str(minfileage)
print 'DEBUG: MAX FILE AGE: ' + str(maxfileage)
if (args.debug):
print "DEBUG: Connecting to S3"
s3 = boto.connect_s3()
if (args.debug):
print "DEBUG: S3 Connection: %s" % s3
# Check if bucket exists. Exit with critical if it doesn't
nonexistent = s3.lookup(bucketname)
if nonexistent is None:
print "CRITICAL: No bucket found with a name of " + str(bucketname)
exit(2)
else:
if (args.debug):
print "DEBUG: Hooray the bucket " + str(bucketname) + " was found!"
bucket = s3.get_bucket(bucketname)
if (args.debug):
print "Bucket: %s" % bucket
#Figure out time delta between current time and max/min file age
maxagetime = datetime.datetime.now(tzutc()) - datetime.timedelta(hours=maxfileage)
if (args.debug):
print 'MAX AGE TIME: ' + str(maxagetime)
minagetime = datetime.datetime.now(tzutc()) - datetime.timedelta(hours=minfileage)
if (args.debug):
print 'MIN AGE TIME: ' + str(minagetime)
#Loop through keys (files) in the S3 bucket and
#check each one for min and max file age.
for key in bucket.list():
if (re.match(bucketfolder_regex,str(key.name))):
if (args.listfiles):
print '|' + str(key.storage_class) + '|' + str(key.name) + '|' \
+ str(dateutil.parser.parse(key.last_modified).replace(tzinfo=tzutc()))
if dateutil.parser.parse(key.last_modified) < maxagetime:
if (args.listfiles):
print 'Found file older than maxfileage of ' + str(maxfileage) + ' hours'
maxfilecount += 1
#print key.__dict__
if dateutil.parser.parse(key.last_modified) > minagetime:
if (args.listfiles):
print 'Found file newer than minfileage of ' + str(minfileage) + ' hours'
minfilecount += 1
totalfilecount += 1
#Begin formatting status message for Nagios output
#This is conditionally formatted based on requested min/max options.
msg = ' -'
if minfileage > 0:
msg = msg + ' MIN:' + str(minfileage) + 'hrs'
if maxfileage > 0:
msg = msg + ' MAX:' + str(maxfileage) + 'hrs'
if maxfileage > 0:
msg = msg + ' - Files exceeding MAX time: ' + str(maxfilecount)
if minfileage > 0:
msg = msg + ' - Files meeting MIN time: ' + str(minfilecount)
msg = msg + ' - Total file count: ' + str(totalfilecount)
#I think there probably is a better way of doing this but what I have here works.
#
# Decide exit code for Nagios based on maxfilecount and minfilecount results.
#
# maxfilecount should equal zero for green/OK
# minfilecount should be greater than zero for green/OK
#
if minfileage == 0 and maxfileage == 0:
statusline = 'WARNING: No max or min specified. Please specify at least one.' + msg
exitcode = 1
elif maxfilecount == 0 and minfilecount > 0:
statusline = 'OK: No S3 files exceeding time boundaries.' + msg
exitcode = 0
elif (maxfilecount > 0 or minfilecount == 0) and maxfileage > 0 and minfileage > 0:
statusline = 'CRITICAL: S3 files exceed time boundaries.' + msg
exitcode = 2
elif maxfilecount > 0 and maxfileage > 0 and minfileage == 0:
statusline = 'CRITICAL: S3 files exceed MAX time boundaries.' + msg
exitcode = 2
elif minfilecount == 0 and maxfileage == 0 and minfileage > 0:
statusline = 'CRITICAL: S3 files do not meet MIN time requirement.' + msg
exitcode = 3
elif minfilecount > 0 and maxfileage == 0 and minfileage > 0:
statusline = 'OK: S3 files meet MIN time boundaries.' + msg
exitcode = 0
elif maxfilecount == 0 and maxfileage > 0 and minfileage == 0:
statusline = 'OK: S3 files meet MAX time boundaries.' + msg
exitcode = 0
else:
statusline = 'UNKNOWN: ' + msg
exitcode = 3
print statusline
exit(exitcode)