-
Notifications
You must be signed in to change notification settings - Fork 113
/
Copy pathcheck_snmp_netint.pl
2250 lines (2170 loc) · 102 KB
/
check_snmp_netint.pl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#!/usr/bin/perl -w
#
# ============================== SUMMARY =====================================
#
# Program : check_snmp_netint.pl
# Version : 2.36
# Date : June 9, 2012
# Authors : William Leibzon - [email protected],
# Patrick Proy ( patrick at proy.org ),
# and many other listed in "CONTRIBUTORS" documentation section
# Licence : GPL - summary below, full text at http://www.fsf.org/licenses/gpl.txt
#
# =========================== PROGRAM LICENSE =================================
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# ===================== INFORMATION ABOUT THIS PLUGIN =========================
#
# This is a plugin for nagios to check network interfaces (network ports)
# on servers switches & routers. It is based on check_snmp_int.pl plugin
# by Patrick Ploy with extensive rewrites for performance improvements
# (caching improved execution time by up to 100%) and additions to better
# support Cisco and other switches (it can query and cache cisco port names,
# cisco port link data and for cisco and other switches STP status). Other
# improvements are ability to check port traffic & utilization without
# creation of temporary files.
#
# ====================== SETUP AND PLUGIN USE NOTES =========================
#
# Help : ./check_snmp_netint.pl -h
# above will tell you most you probalby need for this to make this plugin work
#
# Patrick's Site: http://nagios.manubulon.com/snmp_int.html
# documentation reproduced below for options shared with check_snmp_int
#
# If you're using -P option to pass performance data back to plugin then
# you may (depending on version of nagios) also need to modify nagios.cfg
# and remove ' from illegal_macro_output_chars=`~$&|'"<> line, i.e. change to
# illegal_macro_output_chars=`~$&|"<>
#
# ------------------------------------------------------------------------------
# Checks by snmp (v1, v2c or v3) host interface state and usage.
# Interfaces can be selected by regexp ('eth' will check eth0,eth1,eth2, ...).
# If multiple interfaces are selected, all must be up to get an OK result
#
# Standard checks:
# The script will check interface operational status using the MIB-II table.
# To see how interface looks like in snmp, you can list all with the '-v'.
#
# The interfaces are selected by their description in the MIB-II table.
# The interface is/are selected by the -n option. This option will be treated
# as a regular expression (eth will match eth0,eth1,eth2...). You can disable
# this with the -r option : the interface will be selected if it's description
# exactly matches the name given by -n
#
# The script will return OK if ALL interfaces selected are UP, or CRITICAL
# if at least one interface is down. You can make the script return a OK
# value when all interfaces are down (and CRITICAL when at least one is up)
# with the -i option. You can make the same tests on administrative status
# instead with the -a option. If you have ISDN interface, and want that
# DORMANT state returns ok, put -D.
#
# To make output shorter, specially when you have many interfaces, you can put
# the -s option. It will get only the first <n> characters of the interface
# description. If the number is negative then get the last <n> characters.
# Ex : EL20005 3Com Gigabit NIC (3C2000 Family)
# -s 4 will output : "EL20".
# -s -4 will output : "ily)".
#
# Performance output
# -f option : performance output (default the In/out octet as a counter).
# -e option : in/out errors and discarded packets. -f must also be set.
# -S option : Include speed in performance output in bits/s as '<interface_name>_speed_bps'
# -y option : output performance data in % of interface speed
# -Y option : output performance data in bits/s or Bytes/s (depending on -B)
# Note : -y and -Y options need the usage check to ba active (-k)
# Warning : the counters needed by -e are not available on all devices
#
# Usage check
# -k : activates the standard usage feature
# -q : activates the extended usage
# -d : delta in seconds (default is 300s)
# -w : warning levels
# -c : critical levels
#
# If you specify '-k' a temporary file will be created in "/tmp" by default
# (unless -P option is also used, see below). Directory and start of filename
# can be set with '-F' option with result file being like
# tmp_Nagios_int.<host IP>.<Interface name>, one file per interface
#
# If you do "-k -P \$SERVICEPERFDATA\$ -T \$LASTSERVICECHECK\$" then no file
# is created and instead data from previous check is feed back into plugin.
#
# The status UNKNOWN is returned when the script doesn't have enough
# information (see -d option). You will have to specify the warning and
# critical levels, separated with "," and you can use decimal (ex : 10.3).
# For standard checks (no "-q") :
# -w <In warn>,<Out warn> -c <In warn>,<Out warn>
# In warn : warning level for incomming traffic
# Out warn : warning level for outgoing traffic
# In crit : critical level for incomming traffic
# Out crit : critical level for outgoing traffic
#
# Use 0 if you do not want to specify any warning or critical threshold
# You can also use '-z' option which makes specifying -w and -c optional
# but still allows to see all the values in status or use them for graphing
#
# The unit for the check depends on the -B, -M and -G option :
# B set -B not set
# ----------------+--------+-------------
# -M & -G not set | Kbps | KBps
# -M set | Mbps | MBps
# -G set | Gbps | GBps
#
# It is possible to put warning and critical levels with -b option.
# 0 means no warning or critical level checks
#
# When the extended checks are activated (-q option), the warning levels are
# -w <In bytes>,<Out bytes>,<In error>,<Out error>,<In disc>,<Out disc>
# -c <In warn>,<Out warn>, .....
# In error : warn/crit level in inboud error/minute
# Out error : warn/crit level in outbound error/minute
# In disc : warn/crit level in inboud discarded packets/minute
# Out disc : warn/crit level in outbound discarded packets/minute
#
# -d: delta time
# You can put the delta time as an option : the "delta" is the prefered time
# between two values that the script will use to calculate the average
# Kbytes/s or error/min. The delta time should (not must) be bigger than
# the check interval.
# Here is an example : Check interval of 2 minutes and delta of 4min
# T0 : value 1 : can't calculate usage
# T0+2 : value 2 : can't calculate usage
# T0+4 : value 3 : usage=(value3-value1)/((T0+4)-T0)
# T0+6 : value 4 : usage=(value4-value2)/((T0+6)-T0+2)
# (Yes I know TO+4-T0=4, it's just to explain..)
# The script will allow 10% less of the delta and 300% more than delta
# as a correct interval. For example, with a delta of 5 minutes, the
# acceptable interval will be between 4'30" and 15 minutes.
#
# Msg size option (-o option)
# In case you get a "ERROR: running table: Message size exceeded maxMsgSize"
# error, you may need to adjust the maxMsgSize, i.e. the maximum size of
# snmp message with the -o option. Try a value with -o AND the -v option,
# the script will output the actual value so you can add some octets to it
# with the -o option.
#
# --label option
# This option will put label before performance data value:
# Without : eth1:UP (10.3Kbps/4.4Kbps), eth0:UP (10.9Kbps/16.4Kbps):2 UP: OK
# With : eth1:UP (in=14.4Kbps/out=6.2Kbps), eth0:UP (in=15.3Kbps/out=22.9Kbps):2 UP: OK
#
# Note: Do not rely on this option meaning same thing in the future, it may be
# changed to specify label to put prior to plugin output with this
# option changing to something else...
#
# -----------------------------------------------------------------------------
# Below is documentation for options & features unique to check_snmp_netint
# that were not part of check_snmp_int:
#
# I. Plugin execution time and performance and optimization options:
# 1. [default] By default this plugin will first read full
# 'ifindex description' table and from that determine which interfaces
# are to be checked by doing regex with name(s) given at -n. It will
# then issue several SNMP queries - one for operational or admin status
# and 2nd one for "performance" data. If '--cisco' and '--stp' options
# are given then several more queries are done to find mapping from
# cisco ports to ifindex and separate mapping between ifindex and stp,
# only then can queries be done for additional cisco & stp status data.
# 2. ['minimize_queries'] If you use '-m' ('--minimize_queries') option then
# all queries for status data are done together but the original ifindex
# snmp table is still read separately. By itself this brings about 30%
# speed improvement
# 3. ['minimize_queries' and -P] When using '-f -m -P "$SERVICEPERFDATA$"'
# as options, your nagios config performance data is feed back and
# used as a placeholder to cache information on exactly which
# interfaces need to be queried. So no aditional description table
# lookup is necessary. Similarly data for '--cisco' and '--stp'
# maps is also cached and reused. There is only one SNMP query done
# together for all data OIDs (status & performance data) and
# for all interfaces; this query also includes query for specific
# description OID (but not reading entire table) which is then
# compared against cached result to make sure ifindex has not changed.
# Once every 12 hours full check is done and description data is recached.
# 65% to 90% or more speed improvements are common with this option.
# 4. ['minimum_queries' and -P] Using '-f -mm -P "$SERVICEPERFDATA$"'
# is almost the same as "-m" but here extra check that interface
# description is still the same is not done and recaching is every
# 3 days instead of 12 hours. Additionally port speed data is also
# cached and not checked every time. These provide marginal extra
# plugin execution time impovements over '-m' (75%-100% improvement
# over not doing -m) but is not safe for devices where port ifindex
# may change (i.e. switches with removeable interface modules).
# But in 99% of the cases it should be ok do to use this option.
#
# II. As mentioned previously when you want to see current traffic in/out &
# utilization data (-k option) for interface this requires previous octet
# count data to calculate average and so normally this requires temporary
# file (see -F option). But when you feed nagios performance data back to
# plugin as per above that means you already provide with at least one set
# of previous data, so by also adding '-T $LASTSERVICECHECK$' (which is time
# of last check when this data was cached) you can have this plugin report
# current traffic in Mb (or kb, etc) without any temporary files.
#
# As of version 2.1 its possible to also have short history as part of
# performance data output i.e. plugin will output not only the
# most current data but also one or more sets of previous data.
# Bandwidth calculations are then less "bursty". Total number of such
# sets is controlled with '--pcount' option and by default is 2.
# If you have only one interface checked with this plugin its probably
# safe to increase this to 3 or 4, but larger values or more interfaces
# are an issue unless you increased size of nagios buffer used to
# store performance data.
#
# III.For those of you with Cisco switches you may have noticed that they
# do not provide appropriate port names at standard SNMP ifdescr table.
# There are two options to help you:
# 1. If you set custom port names ('set port 1/xx name zzz") you can use
# those names with "--cisco=use_portnames" option.
# 2. Another option is specify custom description table with
# "-N 1.3.6.1.2.1.31.1.1.1.1"
# and optionally display "set port name" as a comment.
# Its recommended you try both:
# "-N 1.3.6.1.2.1.31.1.1.1.1 --cisco=show_portnames" and
# "-O 1.3.6.1.2.1.31.1.1.1.1 --cisco=use_portnames"
# and see which works best in your case
#
# Additionally when using "--cisco" option the plugin will attempt to
# retrieve port status information from 3 cisco-specific tables (see below).
# If any "unusual" status is listed there the output is provided back - this
# can be useful to diagnose if you have faulty cable or if the equipment
# on the other end is bad, etc. The tables retrieved are:
# --cisco=oper portOperStatus = 1.3.6.1.4.1.9.5.1.4.1.1.6
# --cisco=linkfault portLinkFaultStatus = 1.3.6.1.4.1.9.5.1.4.1.1.22
# --cisco=addoper portAdditionalOperStatus = 1.3.6.1.4.1.9.5.1.4.1.1.23
# --cisco=noauto special option - none of the above
# You can mix-match more then one table (together with show_portnames) or not
# specify at all (i.e. just '--cisco') in which case plugin will attempt to
# retrieve data from all 3 tables first time (stop with '--cisco=noauto')
# but if you use caching (-m) it will output and cache which table actually
# had usable data and will not attempt to retrieve from tables that did
# not exist on subsequent calls.
#
# IV. Support is also provided to query STP (Spanning Tree Protocol) status
# of the port. Although only tested with cisco switches, this is
# standartized SNMP data and should be supported by few other vendors
# so separate '--stp' option will work without '--cisco' option.
# The plugin will report single WARNING alert if status changes so
# be prepared for some alerts if your network is undergoing reorganization
# due to some other switch getting unplugged. Otherwise STP status is also
# very useful diagnostic data if you're looking as to why no traffic is
# passing through particular interface...
#
# ============================ EXAMPLES =======================================
#
# First set of examples is from Patrick's site:
#
# check_snmp_netint using snmpv1:
# define command{
# command_name check_snmp_int_v1
# command_line $USER1$/check_snmp_netint.pl -H $HOSTADDRESS$ $USER7$ -n $ARG1$ $ARG2$
# }
# Checks FastEthernet 1 to 6 are up (snmpv1):
# define service {
# name check_int_1_6
# check_command check_snmp_int_v1!"FastEthernet-[1-6]"
# }
# Checks input bandwith on eth1 is < 100 KBytes/s and output is < 50 Kbytes/s
# (critical at 0,0 means no critical levels). (snmpv3):
# define service {
# name check_int_eth0_bdw
# check_command check_snmp_int_v3!eth0!-k -w 100,50 -c 0,0
# }
# ----------------------------------------------------------------
#
# Linux server with one or more eth? and one or more bond? interface:
# define command {
# command_name check_snmp_network_interface_linux
# command_line $USER1$/check_snmp_int.pl -2 -f -e -C $USER6$ -H $HOSTADDRESS$
# -n $ARG1$ -w $ARG2$ -c $ARG3$ -d 200 -q -k -y -M -B
# -m -P "$SERVICEPERFDATA$" -T "$LASTSERVICECHECK$"
# }
# define service{
# use std-service
# servicegroups snmp,netstatistics
# hostgroup_name linux
# service_description Network Interfaces
# check_command check_snmp_network_interface_linux!"eth|bond"!50,50,0,0,0,0!100,100,0,0,0,0
# }
#
# Alteon switch - really funky device that does not like snmp v2 queries
# (so no -2) and no good interface names table. Therefore normal ifindex
# is used instead with index->names translation somewhat "guessed" manually
# with snmpwalk based on data (for those who want to know more, the first
# 255 ids are reserved for VLANs):
# define command {
# command_name check_snmp_network_interface_alteon
# command_line $USER1$/check_snmp_netint.pl -f -C $USER5$ -H $HOSTADDRESS$
# -N 1.3.6.1.2.1.2.2.1.1 -n $ARG1$ -w $ARG2$ -c $ARG3$ -d 200 -k -y
# -M -B -m -P "$SERVICEPERFDATA$" -T "$LASTSERVICECHECK$"
# }
# define service{
# use std-switch-service
# servicegroups snmp,netstatistics
# hostgroup_name alteon184
# service_description Alteon Gigabit Port 1
# check_command check_snmp_network_interface_alteon!"257"!0,0!0,0
# }
#
# Cisco CatOS switch (will work for 5500 and many others), full set of possible options is given:
# define command {
# command_name check_snmp_network_interface_catos
# command_line $USER1$/check_snmp_netint.pl -2 -f -C $USER5$
# -H $HOSTADDRESS$ -N 1.3.6.1.2.1.31.1.1.1.1 --cisco=show_portnames --stp
# -n $ARG1$ -w $ARG2$ -c $ARG3$ -d 200 -e -q -k -y -M -B -mm
# -P "$SERVICEPERFDATA$" -T "$LASTSERVICECHECK$"
# }
# define service{
# use std-switch-service
# servicegroups snmp,netstatistics
# hostgroup_name cs2948
# service_description GigabitEthernet2/1
# check_command check_snmp_network_interface_catos!"2/1$"!0,0,0,0,0,0!0,0,0,0,0,0
# }
#
# Cisco 2960 (IOS) switch (has only portOperStatus extended port state table):
# define command {
# command_name check_snmp_network_interface_cisco2960
# command_line $USER1$/check_snmp_netint.pl -2 -f -C $USER5$
# -H $HOSTADDRESS$ --cisco=oper,show_portnames --stp -n $ARG1$ -w $ARG2$
# -c $ARG3$ -d $USER8$ -e -q -k -y -M -B -mm -P "$SERVICEPERFDATA$"
# -T "$LASTSERVICECHECK$" --label
# }
# define service{
# use std-switch-service
# servicegroups snmp,netstatistics
# hostgroup_name cs2960
# service_description GigabitEthernet0/1
# check_command check_snmp_network_interface_cisco2960!"GigabitEthernet0/1$"!0,0,0,0,0,0!0,0,0,0,0,0
# }
#
# Other ports on above switches are defined similarly as separate services -
# you don't have to do it this way though, but all 48 ports is too much for
# one check to handle so if you have that many split checks into groups of
# no more then 12 ports
#
# ======================= VERSIONS and CHANGE HISTORY =========================
#
# [1.4] This plugin is based on (with now about 60% rewrite or new code)
# release 1.4 (somewhere around May 2007) of the check_snmp_int
# plugin by Patrick Ploy. This is info provided with 1.4 version:
# ----------------------------------------------------------
# Version : 1.4.1
# Date : Jul 9 2006
# Author : Patrick Proy ( patrick at proy.org )
# Help : http://www.manubulon.com/nagios/
# Licence : GPL - http://www.fsf.org/licenses/gpl.txt
# Contrib : J. Jungmann, S. Probst, R. Leroy, M. Berger
# TODO :
# Check isdn "dormant" state
# Maybe put base directory for performance as an option
# ----------------------------------------------------------
#
# The first changes for performance improvements were started in around
# October 2006 with code base at version 1.4.1 of Patrick's check_snmp_int
# plugin. Patricks's latest code from about May 2007 was ported back into
# code maintained by WL (exact 1.4.x version of this port is unclear).
# Those early performance improvement code changes are now invoked with
# 'minimize_queries' (but without -P) option and allow to do query
# for status data for all ports together. Additionally -N option to
# specify different port names table OID was added in 2006 as well.
# Also -F option from above TODO was added too.
#
# [1.5] 06/01/07 - Main code changes by William to allow the plugin to reuse
# its previous performance data (passed with $SERVICEPERFDATA$ macro).
# The changes were extensive and allow to reuse this data in way similar
# to maintaining history file and result in traffic rate (per Mb/Gb etc)
# being reported in the output. Additionally of paramout importance was
# saving list of ports to check (i.e. result of regex) which means that
# port/interface names table do not need to be checked with SNMP every
# time and instead specific ports OIDs can be retrieved with bulk request
# (this is what results in up to 75% performance improvement).
# About 30-40% of the original code was rewritten for these changes and
# '--minimize_queries' (or '-m') option added - back then it acted more
# like '--minimum_queries' or '-mm' in 2.0 release
# [1.5.5] 07/15/07 - Code additions to support cisco-specific data given
# with '--cisco' option. Support is both for using cisco port names
# for regex matching of ports and for using different table for regex
# matching but adding cisco port name as additional comment/description.
# Also cisco-specific port status data (info on if cable is attached,
# etc) are also retrieved & added as additional commentary to port
# UP/DOWN status. Additional coding work on performance improvements
# was also done somewhere between June and July 2007 which in part resulted
# in separation of "--minimize_queries" and "--minimum_queries" options.
# [1.5.7] 07/22/07 - This is when code to support retrieval of STP data
# and '--stp' option were added. Also some more code cleanup related
# to 1.5.x to better support cisco switches.
#
# A code from locally maintained but never released to public 1.5.7
# branch was sent by William to Patrick sometime in early August 2007.
# He briefly responded back that he'll look at it later but never
# responded further and did not incorporate this code into his main
# branch releasing newer version of 1.4.x. As a result since there is
# public benefit in new code due to both performance and cisco-specific
# improvements, this will now be released as new plugin 'check_snmp_netint"
# with branch version startint at 2.0. The code will be maintained
# by William unless Patrick wants to merge it into his branch later.
# There is about 50% code differences (plugin header documentation you're
# reading are not counted) between this release and check_snmp_int 1.4
# which is where this plugin started from.
#
# [2.0] 12/20/07 - First public release as check_snmp_netint plugin. Primary
# changes from 1.5.7 are the "header" with history and documentation
# which are necessary for such public release, copyright notice changed
# (W. Leibzon was listed only as contributor before), etc.
#
# [2.1] 12/26/07 - Support for more then one set of previous data in
# performance output to create short history for better bandwidth
# check results. New option '--pcount' controls how many sets.
# 12/27/07 - Finally looked deeper into code that calculates bandwidth
# and speed data and saw that it was really only using one result and
# not some form or average. I rewrote that and it will now report back
# average from multiple successful consequitive checks which should give
# much smoother results. It also means that --pcount option will now
# be used to specify how many sets of data will be used for average
# even if temporary file is used to store results.
# 01/08/08 - Bug fixes in new algorithm
# [2.15] 01/12/08 - Fixed so that port speed table is not retrieved unless
# options -Y or -u or -S are given. Also fixed to make sure portpseed
# performance variable is only reported when '-S' option is given
# (however for caching speed data is also in 'cache_int_speed')
# [2.16] 02/03/08 - Bug fixed in how timestamp array is saved by new algorithm,
# it would have resulted in only up to 2 previous data being used properly
# even if > 2 are actually available
# [2.17] 04/02/08 - Bug fixes related to STP and Cisco port data extensions for
# cases when no data is returned for some or all of the ports
# [2.18] 04/03/08 - Rewrite of cisco additional port status data extensions.
# Now 3 tables: portOperStatus=1.3.6.1.4.1.9.5.1.4.1.1.6
# portLinkFaultStatus = 1.3.6.1.4.1.9.5.1.4.1.1.22
# portAdditionalOperStatus = 1.3.6.1.4.1.9.5.1.4.1.1.23
# are supported but user can specify as option to --cisco= which one
# is to be retrieved. When its not specified the plugin defaults to
# "auto" mode (unless --cisco=noauto is used) and will try to retrieve
# data for all 3 tables, check which data is available and then
# cache these results and in the future only retrieve tables that
# returned some data. This behavior should work with all cisco switches
# and not only with cisco catos models. But be warned about bugs in
# complex behavior such as this...
# [2.19] 04/06/08 - For STP port changes previous state is now reported in
# the output (instead of just saying STP changed)
#
# [2.20] 04/10/08 - Releasing 2.2 version as stable. No code changes but
# documentation above has been updated
# [2.201] 04/15/08 - Minor results text info issue (',' was not added before operstatus)
# [2.21] 06/10/08 - Minor fixes. Some documentation cleanup.
# Option -S extended to allow specifying expected interface
# speed with critical alert if speed is not what is specified
# [2.22] 10/20/08 - Added support for "-D" option (dormant state of ISDN)
# [2.23] 10/22/08 - Code fixes submitted or suggested by Bryan Leaman:
# - Fix to write data to new file, for those using file
# (instead of perfdata MACRO) for previous data
# - _out_bps fixes for those who want to use that directly
# for graphing instead of octet counter
# - New option '-Z' to have octet count in performance data
# instead of having this data by default (though this data
# is required and added automaticly with -P option)
#
# [2.3] 12/15/10 - Various small fixes. Plus a patch sent by Tristan Horn to better
# support minimum and maximum warning and critical thresholds
# [2.31] 01/10/11 - Bug fix when reporting in_prct/out_prct performance metric
# [2.32] 12/22/11 - Fixes for bugs reported by Joe Trungale and Nicolas Parpandet
# Updates to check on existance of utils.pm and use but not require it
# Patch by Steve Hanselman that adds "-I" option:
# "I’ve attached a patch that adds an option to ignore interface status
# (this is useful when you’re monitoring a switch with user devices
# attached that randomly power on and off but you still want
# performance stats and alerts on bandwidth when in use)."
# [2.34] 12/25/11 - Based on comments/requests on nagiosexchange, -z option has been added.
# This option makes specifyng thresholds with -w and/or -c optional
# for those who want to use plugin primarily for data collection
# and graphing. This was (and still can be) accomplished before by
# specifying threshold value as 0 and then its not checked. Also the
# use of -w and -c is unnecessary if you do not use -k or -q options.
# [2.35] 04/19/12 - Added patch by Sébastien PRUD'HOMME which incorporates changes
# and bug fixes in revsions 1.23 and 1.19 of check_snmp_int (done
# after this plugin deverged from it) into this plugin as well.
# The changes add proper support for 64-bit counters when -g
# option is used and fix a bug when output is in % / perf in Bytes.
# [2.36] 06/15/12 - 1) Added fixes suggested in modified version of this plugin created
# by Yannick Charton to remove ^@ (NULL ?) and other not-ASCII
# characters at the end of the interface description. This allows
# to correctly match the network interface on some Windows servers.
# 2) Extended '-v' (debug/verbose) option so that instead of writing
# to STDOUT people could specify a file to write debug output to.
# 3) Using of quotewords() in prev_perf as suggested by Nicholas Scott
# allows to work with interfaces that have space in their name.
# Due to this plugin now require Text::ParseWords perl library.
# 4) List of contributors created as a separate header section below.
#
# [2.37] 08/29/16 - 1) Added duplex check -a
# 2) speed check is now minimum check instead of equal
# 3) if duplex state is 0, then skip this and skip also speed check
#
# ============================ LIST OF CONTRIBUTORS ===============================
#
# The following individuals have contributed code, patches, bug fixes and ideas to
# this plugin:
#
# Patrick Proy
# William Leibzon
# J. Jungmann
# S. Probst
# R. Leroy
# M. Beger
# Bryan Leaman
# Tristan Horn
# Yannick Charton
# Steve Hanselman
# Sébastien PRUD'HOMME
# Nicholas Scott
# Oliver Skibbe
#
# Open source community is forever grateful for all your contributions.
#
# ============================ START OF PROGRAM CODE =============================
use strict;
use Getopt::Long;
use Text::ParseWords;
# Nagios specific
use lib "/usr/lib64/nagios/plugins";
our $TIMEOUT;
our %ERRORS;
eval 'use utils qw(%ERRORS $TIMEOUT)';
if ($@) {
$TIMEOUT = 10;
%ERRORS = ('OK'=>0,'WARNING'=>1,'CRITICAL'=>2,'UNKNOWN'=>3,'DEPENDENT'=>4);
}
our $no_snmp=0;
eval 'use Net::SNMP';
if ($@) {
$no_snmp=1;
}
# Version
my $Version='2.37';
############### BASE DIRECTORY FOR TEMP FILE (override this with -F) ########
my $o_base_dir="/tmp/tmp_Nagios_int.";
my $file_history=200; # number of data to keep in files.
# SNMP OID Datas
my $inter_table= '.1.3.6.1.2.1.2.2.1';
my $index_table = '1.3.6.1.2.1.2.2.1.1';
my $descr_table = '1.3.6.1.2.1.2.2.1.2';
my $oper_table = '1.3.6.1.2.1.2.2.1.8.';
my $admin_table = '1.3.6.1.2.1.2.2.1.7.';
my $speed_table = '1.3.6.1.2.1.2.2.1.5.';
my $speed_table_64 = '1.3.6.1.2.1.31.1.1.1.15.';
my $duplex_table = '1.3.6.1.2.1.10.7.2.1.19.';
my $in_octet_table = '1.3.6.1.2.1.2.2.1.10.';
my $in_octet_table_64 = '1.3.6.1.2.1.31.1.1.1.6.';
my $in_error_table = '1.3.6.1.2.1.2.2.1.14.';
my $in_discard_table = '1.3.6.1.2.1.2.2.1.13.';
my $out_octet_table = '1.3.6.1.2.1.2.2.1.16.';
my $out_octet_table_64 = '1.3.6.1.2.1.31.1.1.1.10.';
my $out_error_table = '1.3.6.1.2.1.2.2.1.20.';
my $out_discard_table = '1.3.6.1.2.1.2.2.1.19.';
my %status=(1=>'UP',2=>'DOWN',3=>'TESTING',4=>'UNKNOWN',5=>'DORMANT',6=>'NotPresent',7=>'lowerLayerDown');
# WL: For use in Cisco CATOS special hacks, enable use with "--cisco"
my $cisco_port_name_table='1.3.6.1.4.1.9.5.1.4.1.1.4'; # table of port names (the ones you set with 'set port name')
my $cisco_port_ifindex_map='1.3.6.1.4.1.9.5.1.4.1.1.11'; # map from cisco port table to normal SNMP ifindex table
my $cisco_port_linkfaultstatus_table='1.3.6.1.4.1.9.5.1.4.1.1.22.'; # see table below for possible codes
my $cisco_port_operstatus_table='1.3.6.1.4.1.9.5.1.4.1.1.6.' ;; # see table below for possible values
my $cisco_port_addoperstatus_table='1.3.6.1.4.1.9.5.1.4.1.1.23.'; # see table below for possible codes
# codes are as of July 2007 (just in case cisco updates MIB and somebody is working with this plugin later)
my %cisco_port_linkfaultstatus=(1=>'UP',2=>'nearEndFault',3=>'nearEndConfigFail',4=>'farEndDisable',5=>'farEndFault',6=>'farEndConfigFail',7=>'otherFailure');
my %cisco_port_operstatus=(0=>'operstatus:unknown',1=>'operstatus:other',2=>'operstatus:ok',3=>'operstatus:minorFault',4=>'operstatus:majorFault');
my %cisco_port_addoperstatus=(0=>'other',1=>'connected',2=>'standby',3=>'faulty',4=>'notConnected',5=>'inactive',6=>'shutdown',7=>'dripDis',8=>'disable',9=>'monitor',10=>'errdisable',11=>'linkFaulty',12=>'onHook',13=>'offHook',14=>'reflector');
# STP Information (only tested with Cisco but should work with many other switches too)
my $stp_dot1dbase_ifindex_map='1.3.6.1.2.1.17.1.4.1.2'; # map from dot1base port table to SNMP ifindex table
my $stp_dot1dbase_portstate='1.3.6.1.2.1.17.2.15.1.3.'; # stp port states
my %stp_portstate=('0'=>'unknown',1=>'disabled',2=>'blocking',3=>'listening',4=>'learning',5=>'forwarding',6=>'broken');
my %stp_portstate_reverse=(); # becomes reverse of above, i.e. 'disabled'=>1, etc
# duplex states
my %duplex_status = ( 0 => 'interfaceDown', 1 => 'unknown', 2 => 'halfDuplex', 3 => 'fullDuplex' );
# Standard options
my $o_host = undef; # hostname
my $o_timeout= undef; # Timeout (Default 10)
my $o_descr = undef; # description filter
my $o_help= undef; # wan't some help ?
my $o_admin= undef; # admin status instead of oper
my $o_inverse= undef; # Critical when up
my $o_ignorestatus= undef; # Ignore interface NAK status, always report OK
my $o_dormant= undef; # Dormant state is OK
my $o_verb= undef; # verbose mode/debug file name
my $o_version= undef; # print version
my $o_noreg= undef; # Do not use Regexp for name
my $o_short= undef; # set maximum of n chars to be displayed
my $o_label= undef; # add label before speed (in, out, etc...).
# Speed/error checks
my $o_warn_opt= undef; # warning options
my $o_crit_opt= undef; # critical options
my @o_warn_min= undef; # warning levels of perfcheck
my @o_warn_max= undef; # warning levels of perfcheck
my @o_crit_min= undef; # critical levels of perfcheck
my @o_crit_max= undef; # critical levels of perfcheck
my $o_checkperf= undef; # checks in/out/err/disc values
my $o_delta= 300; # delta of time of perfcheck (default 5min)
my $o_ext_checkperf= undef; # extended perf checks (+error+discard)
my $o_highperf= undef; # Use 64 bits counters
my $o_meg= undef; # output in MBytes or Mbits (-M)
my $o_gig= undef; # output in GBytes or Gbits (-G)
my $o_prct= undef; # output in % of max speed (-u)
my $o_kbits= undef; # Warn and critical in Kbits instead of KBytes
my $o_zerothresholds= undef; # If warn/crit are not specified, assume its 0
# Average Traffic Calculation Options (new option for upcoming 2.4 beta)
my $o_timeavg_opt= undef; # New option that allows to keep track of average traffic
# (50 percentile) over longer period and to set
# threshold based on deviation from this average
my $o_atime_nchecks_opt= undef; # Minimum number of samples for threshold to take affect
# (2 numbers: one fo take affect in addition to regular
# threshold, 2nd number is to take
# Duplex option
my $o_duplex= undef; # duplex option
# Performance data options
my $o_perf= undef; # Output performance data
my $o_perfe= undef; # Output discard/error also in perf data
my $o_perfs= undef; # include speed in performance output (-S)
my $o_perfp= undef; # output performance data in % of max speed (-y)
my $o_perfr= undef; # output performance data in bits/s or Bytes/s (-Y)
my $o_perfo= undef; # output performance data in octets (-Z)
# WL: These are for previous performance data that nagios can send data to the plugin
# with $SERVICEPERFDATA$ macro. This allows to calculate traffic without temporary
# file and also used to cache SNMP table info so as not to retreive it every time
my $o_prevperf= undef; # performance data given with $SERVICEPERFDATA$ macro
my $o_prevtime= undef; # previous time plugin was run $LASTSERVICECHECK$ macro
my @o_minsnmp= (); # see below
my $o_minsnmp= undef; # minimize number of snmp queries
my $o_maxminsnmp= undef; # minimize number of snmp queries even futher (slightly less safe in case of switch config changes)
my $o_filestore= undef; # path of the file to store cached data in - overrides $o_base_dir
my $o_pcount= 2; # how many sets of previous data should be in performance data
# These are unrelated WL's contribs to override default description OID 1.3.6.1.2.1.2.2.1.2 and for stp and cisco m[a|y]stery
my $o_descroid= undef; # description oid, overrides $descr_table
my $o_commentoid= undef; # comment text oid, kind-of like additional label text
my $o_ciscocat= undef; # enable special cisco catos hacks
my %o_cisco= (); # cisco options
my $o_stp= undef; # stp support option
# Login and other options specific to SNMP
my $o_port = 161; # SNMP port
my $o_octetlength= undef; # SNMP Message size parameter (Makina Corpus contrib)
my $o_community = undef; # community
my $o_version2 = undef; # use snmp v2c
my $o_login= undef; # Login for snmpv3
my $o_passwd= undef; # Pass for snmpv3
my $v3protocols= undef; # V3 protocol list.
my $o_authproto= 'md5'; # Auth protocol
my $o_privproto= 'des'; # Priv protocol
my $o_privpass= undef; # priv password
# Readable names for counters (M. Berger contrib)
my @countername = ( "in=" , "out=" , "errors-in=" , "errors-out=" , "discard-in=" , "discard-out=" );
my $checkperf_out_desc;
## Additional global variables
my %prev_perf= (); # array that is populated with previous performance data
my @prev_time= (); # timestamps if more then one set of previois performance data
my $perfcache_time=undef; # time when data was cached
my $perfcache_recache_trigger=43200; # How many seconds to use cached data for (default 12 hours for -m)
my $perfcache_recache_max=259200; # and 3 days for -mm (minmize most)
my $timenow=time(); # This used to be defined later but easier if moved to the top
my $stp_warntime=900; # Warn in case of change in STP state in last 15 minutes
my $check_speed=0; # If '-Y', '-u' or '-S' options are given this is set to 1
my $check_duplex=1; # check duplex
my $ok_duplex=3; #
my $expected_speed=0; # if -S has interface speed specified, this is set and alert is issued if interface is not same speed
# Functions
sub read_file {
# Input : File, items_number
# Returns : array of value : [line][item]
my ($traffic_file,$items_number)=@_;
my ($ligne,$n_rows)=(undef,0);
my (@last_values,@file_values,$i);
open(FILE,"<".$traffic_file) || return (1,0,0);
while($ligne = <FILE>)
{
chomp($ligne);
@file_values = split(":",$ligne);
#verb("@file_values");
if ($#file_values >= ($items_number-1)) {
# check if there is enough data, else ignore line
for ( $i=0 ; $i< $items_number ; $i++ ) {$last_values[$n_rows][$i]=$file_values[$i];}
$n_rows++;
}
}
close FILE;
if ($n_rows != 0) {
return (0,$n_rows,@last_values);
} else {
return (1,0,0);
}
}
sub write_file {
# Input : file , rows, items, array of value : [line][item]
# Returns : 0 / OK, 1 / error
my ($file_out,$rows,$item,@file_values)=@_;
my $start_line= ($rows > $file_history) ? $rows - $file_history : 0;
if ( open(FILE2,">".$file_out) ) {
for (my $i=$start_line;$i<$rows;$i++) {
for (my $j=0;$j<$item;$j++) {
print FILE2 $file_values[$i][$j];
if ($j != ($item -1)) { print FILE2 ":" };
}
print FILE2 "\n";
}
close FILE2;
return 0;
} else {
return 1;
}
}
sub prettyBits {
my $size = $_[0];
foreach ('bit/s','kbit/s','mbit/s','gbit/s','tbit/s','pbit/s')
{
return sprintf("%.2f",$size)."$_" if $size < 1000;
$size /= 1000;
}
}
sub p_version { print "check_snmp_netint version : $Version\n"; }
sub print_usage {
print "Usage: $0 [-v [debugfilename]] -H <host> (-C <snmp_community> [-2]) | (-l login -x passwd [-X pass -L <authp>,<privp>) [-p <port>] [-N <desc table oid>] -n <name in desc_oid> [-O <comments table OID>] [-I] [-i | -a | -D] [-r] [-f[eSyYZ] [-P <previous perf data from nagios \$SERVICEPERFDATA\$>] [-T <previous time from nagios \$LASTSERVICECHECK\$>] [--pcount=<hist size in perf>]] [-k[qBMGu] [-S [intspeed]] -g [-w<warn levels> -c<crit levels> [-z]| -z] -d<delta>] [-o <octet_length>] [-m|-mm] [-t <timeout>] [-s] [--label] [--cisco=[oper,][addoper,][linkfault,][use_portnames|show_portnames]] [--stp[=<expected stp state>]] [-A] [-V]\n";
}
sub isnnum { # Return true if arg is not a number
my $num = shift;
if ( $num =~ /^(\d+\.?\d*)|(^\.\d+)$/ ) { return 0 ;}
return 1;
}
sub ascii_to_hex { # Convert each ASCII character to a two-digit hex number [WL]
(my $str = shift) =~ s/(.|\n)/sprintf("%02lx", ord $1)/eg;
return $str;
}
sub help {
print "\nSNMP Network Interface Monitor Plugin for Nagios (check_snmp_netint) v. ",$Version,"\n";
print "GPL licence, (c)2004-2007 Patrick Proy, (c)2007-2012 William Leibzon\n";
print "contribs by J. Jungmann, S. Probst, R. Leroy, M. Beger, T. Horn and many others\n\n";
print_usage();
print <<EOT;
-v, --verbose[=FILENAME]
Print extra debugging information (including interface list on the system)
If filename is specified instead of STDOUT the debug data is written to that file.
-h, --help
print this help message
-H, --hostname=HOST
name or IP address of host to check
-C, --community=COMMUNITY NAME
community name for the SNMP agent (used with v1 or v2c protocols)
-2, --v2c
use snmp v2c (can not be used with -l, -x)
-l, --login=LOGIN ; -x, --passwd=PASSWD
Login and auth password for snmpv3 authentication
If no priv password exists, implies AuthNoPriv
-X, --privpass=PASSWD
Priv password for snmpv3 (AuthPriv protocol)
-L, --protocols=<authproto>,<privproto>
<authproto> : Authentication protocol (md5|sha : default md5)
<privproto> : Priv protocols (des|aes : default des)
-p, --port=PORT
SNMP port (Default 161)
-N, --descrname_oid=OID
SNMP OID of the description table (optional for non-standard equipment)
-n, --name=NAME
Name in description OID (eth0, ppp0 ...).
This is treated as a regexp : -n eth will match eth0,eth1,...
Test it before, because there are known bugs (ex : trailling /)
-r, --noregexp
Do not use regexp to match NAME in description OID
-O, --optionaltext_oid=OID
SNMP OID for additional optional commentary text name for each interface
This is added into output as interface "label" (but it is not matched on).
-i, --inverse
Make critical when up
-D, --dormant
Dormant state is an OK state (mainly for ISDN interfaces)
-a, --admin
Use administrative status instead of operational
-I, --ignorestatus
Ignore the interface status and return OK regardless
-o, --octetlength=INTEGER
max-size of the SNMP message, usefull in case of Too Long responses.
Be carefull with network filters. Range 484 - 65535, default are
usually 1472,1452,1460 or 1440.
-f, --perfparse
Perfparse compatible output (no output when interface is down).
-e, --error
Add error & discard to Perfparse output
-S, --intspeed[=1000000Kb|100000000Kb|100000000Kb|10Mb|100Mb|1000Mb]
Include speed in performance output in bits/s
Optionally if Speed is specified after =, then CRITICAL alert is issued
if interface connectivity is not the speed its supposed to be
-y, --perfprct ; -Y, --perfspeed ; -Z, --perfoctet
-y : output performance data in % of max speed
-Y : output performance data in bits/s or Bytes/s (depending on -B)
-Z : output performance data in octets (always so with -P)
-k, --perfcheck ; -q, --extperfcheck
-k check the input/ouput bandwidth of the interface
-q also check the error and discard input/output
-P, --prev_perfdata
Previous performance data (normally put '-P \$SERVICEPERFDATA\$' in nagios
command definition). This is used in place of temporary file that otherwise
could be needed when you want to calculate utilization of the interface
Also used to cache data about which OIDs to lookup instead of having
to check interface names table each time.
-T, --prev_checktime
This is used with -P and is a previous time plugin data was obtained,
use it as '-T \$LASTSERVICECHECK\$'
--pcount=INTEGER
How many sets of previus data to keep as performance data. By keeping
at least couple sets allows for more realistic and less 'bursty' results
but nagios has buffer limits so very large output of performance data
would not be kept. Default is now 2 sets.
-d, --delta=seconds
make an average of <delta> seconds (default 300=5min)
-m, --minimize_queries | -mm, --minimum_queries
Minimize number of snmp queries by reusing description table OIDs from
performance data (see -P above) and doing all SNMP checks together.
When "-mm" or "--minimum_queries" option is used the number of queries
is even smaller but there are no checks done to make sure ifindex
description is still the same (very very few devices change it)
--cisco=[oper,][addoper,][linkfault,][use_portnames|show_portnames]
This enables cisco snmp hacks which among other things provide more details
on operational and fault status for physical ports. There are 3 tables
that are available - 'operStatus','AdditionalOperStatus', 'LinkFaultStatus'
(some switches have one, some may have all 3) - if you do not specify an
attempt will be made for everyone but if caching is used what is actually
available will be cached for future requests. When you use optional
"use_portnames" as argument, this means that instead of using normal
SNMP description OID table (or the one you could supply with -N) it would
match name given at '-n' with port description names that you set with
with 'set port name', this does however restrict to only cisco module ports
(ifindex maybe larger and include also non-port interfaces such as vlan).
Using "show_portname" causes port names to go as comments (overrides -O)
--stp[=disabled|blocking|listening|learning|forwarding|broken]
This enables reporting of STP (Spanning Tree Protocol) switch ports states.
If STP port state changes then plugin for period of time (default 15 minutes)
reports WARNING. Optional parameter after --stp= is expected STP state of
the port and plugin will return CRITICAL error if its anything else.
--label
Add label before speed in output : in=, out=, errors-out=, etc...
-g, --64bits
Use 64 bits counters instead of the standard counters when checking
bandwidth & performance data for interface >= 1Gbps.
You must use snmp v2c or v3 to get 64 bits counters.
-A --duplex
Check duplex state of interface(s), goes critical if state 1,2 (Unknown, halfDuplex)
-B, --kbits
Make the warning and critical levels in K|M|G Bits/s instead of K|M|G Bytes/s
-G, --giga ; -M, --mega ; -u, --prct
-G : Make the warning and critical levels in Gbps (with -B) or GBps
-M : Make the warning and critical levels in Mbps (with -B) or MBps
-u : Make the warning and critical levels in % of reported interface speed.
-w, --warning=input,output[,error in,error out,discard in,discard out]
warning level for input / output bandwidth (0 for no warning)
unit depends on B,M,G,u options
warning for error & discard input / output in error/min (need -q)
-c, --critical=input,output[,error in,error out,discard in,discard out]
critical level for input / output bandwidth (0 for no critical)
unit depends on B,M,G,u options
critical for error & discard input / output in error/min (need -q)
-z, --zerothresholds
if warning and/or critical thresholds are not specified, assume they are 0
i.e. do not check thresholds, but still give input/ouput bandwidth for graphing
-s, --short=int
Make the output shorter : only the first <n> chars of the interface(s)
If the number is negative, then get the <n> LAST characters.
-F, --filestore[=<filename>]
When you use -P option that causes plugin to use previous performance data
that is passed as an argument to plugin to calculate in/out bandwidth
instead of storing data in temporary file. But that can give very spiky
results so by using -F you can force plugin to still use cache data file.
Name of the file is a paramter to this option and provides first part
of the path for temporary file.
-t, --timeout=INTEGER
timeout for SNMP in seconds (Default: 5)
-V, --version
prints version number
Note : when multiple interfaces are selected with regexp,
all must be up (or down with -i) to get an OK result.
EOT
}
# For verbose output (updated 06/06/12 to write to debug file if specified)
sub verb {
my $t=shift;
if (defined($o_verb)) {
if ($o_verb eq "") {
print $t, "\n";
}
else {
if (!open (DEBUGFILE, ">>$o_verb")) {
print $t, "\n";
}
else {
print DEBUGFILE $t,"\n";
close DEBUGFILE;
}
}
}
}
# Load previous performance data
# 05/20/12: modified to use quotewords as suggested by Nicholas Scott
sub process_perf {
my %pdh;
my ($nm,$dt);
use Text::ParseWords;
foreach (quotewords('\s+',1,$_[0])) {
if (/(.*)=(.*)/) {
($nm,$dt)=($1,$2);
verb("prev_perf: $nm = $dt");
# in some of my plugins time_ is to profile how long execution takes for some part of plugin
# $pdh{$nm}=$dt if $nm !~ /^time_/;
$pdh{$nm}=$dt;
$pdh{$nm}=$1 if $dt =~ /(\d+)c/; # 'c' is added as designation for octet
push @prev_time,$1 if $nm =~ /.*\.(\d+)/ && (!defined($prev_time[0]) || $prev_time[0] ne $1); # more then one set of previously cached performance data
}
}
return %pdh;
}
# this is normal way check_snmp_int does it
# (function written by WL but based on previous code)
sub perf_name {
my ($iname,$vtype) = @_;
$iname =~ s/'\/\(\)/_/g; #' get rid of special characters in performance description name
return "'".$iname."_".$vtype."'";
}
# alternative function used by WL
sub perf_name2 {
my ($iname,$vtype) = @_;
$iname =~ s/'\/\(\)/_/g; #'
$iname =~ s/\s/_/g;
return $iname."_".$vtype;
}
sub check_options {
Getopt::Long::Configure ("bundling");
GetOptions(
'v:s' => \$o_verb, 'verbose:s' => \$o_verb, "debug:s" => \$o_verb,
'h' => \$o_help, 'help' => \$o_help,
'H:s' => \$o_host, 'hostname:s' => \$o_host,
'p:i' => \$o_port, 'port:i' => \$o_port,
'n:s' => \$o_descr, 'name:s' => \$o_descr,
'C:s' => \$o_community, 'community:s' => \$o_community,
'2' => \$o_version2, 'v2c' => \$o_version2,
'l:s' => \$o_login, 'login:s' => \$o_login,
'x:s' => \$o_passwd, 'passwd:s' => \$o_passwd,
'X:s' => \$o_privpass, 'privpass:s' => \$o_privpass,
'L:s' => \$v3protocols, 'protocols:s' => \$v3protocols,
't:i' => \$o_timeout, 'timeout:i' => \$o_timeout,
'i' => \$o_inverse, 'inverse' => \$o_inverse,
'a' => \$o_admin, 'admin' => \$o_admin,