From: Gerd v. Egidy Date: Wed, 11 Nov 2009 21:02:15 +0000 (+0100) Subject: first working version of check_mem_ucd_snmp X-Git-Url: http://developer.intra2net.com/git/?p=nagios-monitoring;a=commitdiff_plain;h=e84dbce3a85595f3ecea23535d9885dcb44eaa28 first working version of check_mem_ucd_snmp --- e84dbce3a85595f3ecea23535d9885dcb44eaa28 diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..5b6e7c6 --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/check_mem_ucd_snmp/README b/check_mem_ucd_snmp/README new file mode 100644 index 0000000..314e357 --- /dev/null +++ b/check_mem_ucd_snmp/README @@ -0,0 +1,72 @@ +check_mem_ucd_snmp: nagios-check testing the memory of a linux-system via SNMP + +see http://www.intra2net.com/en/developer/monitoring/ +for current version, documentation, contact information etc. + +This nagios plugin is free software, and comes with ABSOLUTELY +NO WARRANTY. It may be used, redistributed and/or modified under +the terms of the GNU General Public Licence; either version 2 +of the License, or (at your option) any later version. + +Usage: check_mem_ucd_snmp [-h|--help] -H [-p ] [-t ] [-T ] [-v] [-i (KB|MB|GB)] +[-1 | -2] [-c ] +[-3] [-u ] [-a (md5|sha)] [-A ] [-x (des|aes)] [-X ] + [-E ] [-n ] +[-t ] [-T ] [-r ] [-R ] + + -?, --usage + Print usage information + -h, --help + Print detailed help screen + -V, --version + Print version information + --extra-opts=[
[@]] + Section and/or config_file from which to load extra options (may repeat) + -H, --hostname=STRING + hostname or IP + -p, --port=INTEGER + portnumber + -T, --retries=INTEGER + SNMP retries on error, default: 1 + -i, --unit=STRING + unit for output and thresholds (KB|MB|GB), default: MB + -1, --snmpv1 + use SNMP version 1 + -2, --snmpv2c + use SNMP version 2c + -c, --community=STRING + SNMPv1/SNMPv2c community name, default: public + -3, --snmpv3 + use SNMP version 3 + -u, --username=STRING + SNMPv3 username + -a, --authprotocol=STRING + SNMPv3 authentication protocol (md5|sha), default: md5 + -A, --authpassword=STRING + SNMPv3 authentication password + -x, --privprotocol=STRING + SNMPv3 privacy protocol (des|aes), default: des + -X, --privpassword=STRING + SNMPv3 privacy password + -E, --contextengineid=STRING + SNMPv3 context engine ID + -n, --contextname=STRING + SNMPv3 context name + -m, --totalavail-warning=FLOAT:FLOAT + Warning threshold for the total memory (real+swap) available, default: 500: + -M, --totalavail-critical=FLOAT:FLOAT + Critical threshold for the total memory (real+swap) available, default: 200: + -r, --realavail-warning=FLOAT:FLOAT + Warning threshold for the real memory available (free+buffer+cache), default: 200: + -R, --realavail-critical=FLOAT:FLOAT + Critical threshold for the real memory available (free+buffer+cache), default: 50: + -t, --timeout=INTEGER + Seconds before plugin times out (default: 15) + -v, --verbose + Show details for command-line debugging (can repeat up to 3 times) + +All thresholds are in nagios standard format, see +http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT +for a description + +This check does currently not support setting the security engine id. diff --git a/check_mem_ucd_snmp/check_mem_ucd_snmp b/check_mem_ucd_snmp/check_mem_ucd_snmp new file mode 100644 index 0000000..ac0be1c --- /dev/null +++ b/check_mem_ucd_snmp/check_mem_ucd_snmp @@ -0,0 +1,371 @@ +#!/usr/bin/perl -w +# +# check_mem_ucd_snmp: nagios-check testing the memory of a linux-system via SNMP +# +# see http://www.intra2net.com/en/developer/monitoring/ +# for current version, documentation, contact information etc. +# +# (C) 2009 by Gerd v. Egidy +# +# 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. +# + +use strict; +use Nagios::Plugin; +use Net::SNMP; +use Data::Dumper; + +my $np = Nagios::Plugin->new( + plugin => "check_mem_ucd_snmp", + version => "0.1", + blurb => "nagios-check testing the memory of a linux-system via SNMP", + usage => "Usage: %s [-h|--help] -H [-p ] [-t ] [-T ] [-v] [-i (KB|MB|GB)]\n" + . "[-1 | -2] [-c ]\n" + . "[-3] [-u ] [-a (md5|sha)] [-A ] [-x (des|aes)] [-X ]\n" + . " [-E ] [-n ]\n" + . "[-t ] [-T ] [-r ] [-R ]", + extra => "\nAll thresholds are in nagios standard format, see\n" + . "http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT\n" + . "for a description\n" + . "\n" + . "This check does currently not support setting the security engine id.\n", + url => "http://www.intra2net.com/en/developer/monitoring/", + license => "This nagios plugin is free software, and comes with ABSOLUTELY\n" + . "NO WARRANTY. It may be used, redistributed and/or modified under\n" + . "the terms of the GNU General Public Licence; either version 2\n" + . "of the License, or (at your option) any later version." + ); + +# basic options +$np->add_arg( + spec => "hostname|H=s", + help => "hostname or IP", + required => 1 + ); +$np->add_arg( + spec => "port|p=i", + help => "portnumber", + default => 161 + ); +$np->add_arg( + spec => "retries|T=i", + help => "SNMP retries on error, default: %s", + default => 1 + ); +$np->add_arg( + spec => "unit|i=s", + help => "unit for output and thresholds (KB|MB|GB), default: %s", + default => "MB" + ); + +# snmp v1/v2c +$np->add_arg( + spec => "snmpv1|1", + help => "use SNMP version 1" + ); +$np->add_arg( + spec => "snmpv2c|2", + help => "use SNMP version 2c" + ); +$np->add_arg( + spec => "community|c=s", + help => "SNMPv1/SNMPv2c community name, default: %s", + default => "public" + ); + +# snmp v3 +$np->add_arg( + spec => "snmpv3|3", + help => "use SNMP version 3" + ); + +$np->add_arg( + spec => "username|u=s", + help => "SNMPv3 username" + ); +$np->add_arg( + spec => "authprotocol|a=s", + help => "SNMPv3 authentication protocol (md5|sha), default: %s", + default => "md5" + ); +$np->add_arg( + spec => "authpassword|A=s", + help => "SNMPv3 authentication password" + ); +$np->add_arg( + spec => "privprotocol|x=s", + help => "SNMPv3 privacy protocol (des|aes), default: %s", + default => "des" + ); +$np->add_arg( + spec => "privpassword|X=s", + help => "SNMPv3 privacy password" + ); +$np->add_arg( + spec => "contextengineid|E=s", + help => "SNMPv3 context engine ID" + ); +$np->add_arg( + spec => "contextname|n=s", + help => "SNMPv3 context name" + ); + +# thresholds +$np->add_arg( + spec => "totalavail-warning|m=s", + help => "Warning threshold for the total memory (real+swap) available, default: %s", + label => [ "FLOAT:FLOAT" ], + default => "500:" + ); +$np->add_arg( + spec => "totalavail-critical|M=s", + help => "Critical threshold for the total memory (real+swap) available, default: %s", + label => [ "FLOAT:FLOAT" ], + default => "200:" + ); +$np->add_arg( + spec => "realavail-warning|r=s", + help => "Warning threshold for the real memory available (free+buffer+cache), default: %s", + label => [ "FLOAT:FLOAT" ], + default => "200:" + ); +$np->add_arg( + spec => "realavail-critical|R=s", + help => "Critical threshold for the real memory available (free+buffer+cache), default: %s", + label => [ "FLOAT:FLOAT" ], + default => "50:" + ); + +# parse arguments +$np->getopts; + +# care for the unit parameter +my $unitstr; +my $unitdiv; +if (uc($np->opts->get("unit")) eq "KB") +{ + $unitstr="KB"; + $unitdiv=1; +} +elsif (uc($np->opts->get("unit")) eq "MB") +{ + $unitstr="MB"; + $unitdiv=1024; +} +elsif (uc($np->opts->get("unit")) eq "GB") +{ + $unitstr="GB"; + $unitdiv=1024*1024; +} +else +{ + $np->nagios_die("illegal unit requested"); +} + +# sanity-check the snmp-version +my $snmpversion=undef; + +if ($np->opts->get("snmpv1")) +{ + $snmpversion=1; +} +if ($np->opts->get("snmpv2c")) +{ + if (defined $snmpversion) + { + $np->nagios_die("you can only define one SNMP version"); + } + else + { + $snmpversion=2; + } +} +if ($np->opts->get("snmpv3")) +{ + if (defined $snmpversion) + { + $np->nagios_die("you can only define one SNMP version"); + } + else + { + $snmpversion=3; + } +} +if (not defined $snmpversion) +{ + # snmp default version + $snmpversion=2; +} + +# create the SNMP session +my %snmpsessionparam = ( + -hostname => $np->opts->get("hostname"), + -port => $np->opts->get("port"), + -version => $snmpversion, + -timeout => $np->opts->get("timeout"), + -retries => $np->opts->get("retries"), + ); +my %snmprequestparam = (); + +if ($snmpversion == 1 || $snmpversion == 2) +{ + $snmpsessionparam{-community}=$np->opts->get("community"); +} +else +{ + $snmpsessionparam{-username}=$np->opts->get("username"); + + if (defined $np->opts->get("authpassword")) + { + $snmpsessionparam{-authprotocol}=$np->opts->get("authprotocol"); + $snmpsessionparam{-authpassword}=$np->opts->get("authpassword"); + } + + if (defined $np->opts->get("privpassword")) + { + $snmpsessionparam{-privprotocol}=$np->opts->get("privprotocol"); + $snmpsessionparam{-privpassword}=$np->opts->get("privpassword"); + } + + if (defined $np->opts->get("contextname")) + { + $snmprequestparam{-contextname}=$np->opts->get("contextname"); + } + if (defined $np->opts->get("contextengineid")) + { + $snmprequestparam{-contextengineid}=$np->opts->get("contextengineid"); + } +} + +($np->opts->get("verbose") > 1) && print Data::Dumper->Dump([\%snmpsessionparam], [qw(snmp_session_data)]); + +my ($session,$snmperror)=Net::SNMP->session(%snmpsessionparam); + +if (!defined $session) +{ + $np->nagios_die("Error opening SNMP session: $snmperror"); +} + +# prepare & execute the snmp request +my $oid_memTotalSwap = "1.3.6.1.4.1.2021.4.3.0"; +my $oid_memAvailSwap = "1.3.6.1.4.1.2021.4.4.0"; +my $oid_memTotalReal = "1.3.6.1.4.1.2021.4.5.0"; +my $oid_memAvailReal = "1.3.6.1.4.1.2021.4.6.0"; +my $oid_memBuffer = "1.3.6.1.4.1.2021.4.14.0"; +my $oid_memCached = "1.3.6.1.4.1.2021.4.15.0"; +my $oid_ssSwapIn = "1.3.6.1.4.1.2021.11.3.0"; +my $oid_ssSwapOut = "1.3.6.1.4.1.2021.11.4.0"; +my $oid_intranator_swap_warning = "1.3.6.1.4.1.30475.1.1.3"; + +# we really need these oids to complete the check +my @essential_oidlist = ($oid_memTotalSwap, $oid_memAvailSwap, $oid_memTotalReal, $oid_memAvailReal, + $oid_memBuffer, $oid_memCached); +# all oids, including the additional ones +my @oidlist = (@essential_oidlist, $oid_ssSwapIn, $oid_ssSwapOut, $oid_intranator_swap_warning); + +my %thisrequest=%snmprequestparam; +$thisrequest{-varbindlist}=\@oidlist; + +($np->opts->get("verbose") > 2) && print Data::Dumper->Dump([\%thisrequest], [qw(snmp_request_data)]); + +my $result = $session->get_request(%thisrequest); +if (!defined $result) +{ + $snmperror=$session->error; + $session->close(); + $np->nagios_die("Error in SNMP request: $snmperror"); +} + +($np->opts->get("verbose") > 0) && print Data::Dumper->Dump([$result], [qw(snmp_result)]); + +$session->close(); + +# check if the essential oids are there +foreach my $oid (@essential_oidlist) +{ + if (!defined $result->{$oid} || $result->{$oid} eq "noSuchObject") + { + $np->nagios_die("Essential OID $oid missing in result"); + } +} + +# interpret the results: use only OIDs listed as essential here! +my $realmem=$result->{$oid_memTotalReal}; +my $realavail=$result->{$oid_memAvailReal}+$result->{$oid_memBuffer}+$result->{$oid_memCached}; +my $swap=$result->{$oid_memTotalSwap}; +my $swapused=$swap-$result->{$oid_memAvailSwap}; +my $totalavail=$realavail+$result->{$oid_memAvailSwap}; + +my @resultvar=(\$realmem, \$realavail, \$swap, \$swapused, \$totalavail); +foreach my $varref (@resultvar) +{ + $$varref/=$unitdiv; +} + +# check the thresholds: do this BEFORE the rounding +my @results = (); + +push (@results, $np->check_threshold( + check => $totalavail, + warning => $np->opts->get("totalavail-warning"), + critical => $np->opts->get("totalavail-critical") + )); +push (@results, $np->check_threshold( + check => $realavail, + warning => $np->opts->get("realavail-warning"), + critical => $np->opts->get("realavail-critical") + )); + +# rounding: show decimals only if value less than limit +foreach my $varref (@resultvar) +{ + if ($$varref < 20) + { + $$varref=sprintf("%.2f",$$varref) + } + else + { + $$varref=sprintf("%.0f",$$varref) + } +} + +# output the performance data +$np->add_perfdata( + label => "total_avail", + value => $totalavail, + uom => $unitstr, + warning => $np->opts->get("totalavail-warning"), + critical => $np->opts->get("totalavail-critical"), + min => 0, + max => $swap+$realmem + ); +$np->add_perfdata( + label => "real_avail", + value => $realavail, + uom => $unitstr, + warning => $np->opts->get("realavail-warning"), + critical => $np->opts->get("realavail-critical"), + min => 0, + max => $realmem + ); +$np->add_perfdata( + label => "swap_used", + value => $swapused, + uom => $unitstr, + min => 0, + max => $swap + ); + +# compose message +$np->nagios_exit( + $np->max_state(@results), + "Real av: $realavail $unitstr, Total av: $totalavail $unitstr, Swapped: $swapused $unitstr", + );