#!/usr/bin/perl -w
# Check Network Interface IO via SNMP.
# Plugin uses OID (1.3.6.1.2.1.2.2) SNMP MIB-2 Interfaces ifTable.
#
#
# Copyright (C) 2009 by Herbert Stadler
# email: hestadler@gmx.at
# License Information:
# 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 3 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, see .
#
#
############################################################################
use POSIX;
use strict;
use Getopt::Long;
use lib ".";
use lib "/usr/lib/nagios/plugins";
use lib "/usr/lib64/nagios/plugins";
use lib "/usr/local/nagios/libexec";
use utils qw(%ERRORS);
use Net::SNMP qw(oid_lex_sort oid_base_match);
my ($opt_version,$opt_help,$opt_verbose);
my ($opt_timeout,$opt_license,$opt_interface);
my ($opt_hostname,$opt_community,$opt_port,$opt_snmpvers);
my ($opt_username,$opt_authpasswd,$opt_authproto);
my ($opt_privpasswd,$opt_privproto);
my ($opt_warn,$opt_crit);
my ($PROGNAME,$REVISION);
my ($state,$msg);
use constant DEFAULT_TIMEOUT =>30;
use constant DEFAULT_PORT =>161;
use constant DEFAULT_COMMUNITY =>"public";
use constant DEFAULT_SNMPVERS =>"2";
use constant DEFAULT_PRIVPROTO =>"DES";
use constant DEFAULT_AUTHPROTO =>"MD5";
use constant WAIT_BETWEEN_MEASUREMENT =>5;
use constant COUNTER_MAXVAL =>4294967296;
# SNMP MIB-2 Interface OID Definitions
my $ifTable ="1.3.6.1.2.1.2.2";
my $ifEntry ="1.3.6.1.2.1.2.2.1";
my $ifIndex ="1.3.6.1.2.1.2.2.1.1";
my $ifDescr ="1.3.6.1.2.1.2.2.1.2";
my $ifAdminStatus ="1.3.6.1.2.1.2.2.1.7";
my $ifOperStatus ="1.3.6.1.2.1.2.2.1.8";
my $ifInOctets ="1.3.6.1.2.1.2.2.1.10";
my $ifOutOctets ="1.3.6.1.2.1.2.2.1.16";
$ENV{'PATH'}='';
$ENV{'BASH_ENV'}='';
$ENV{'ENV'}='';
$PROGNAME = "check_snmp_netifio";
$REVISION = "1.1";
# checking commandline arguments
my $arg_status = check_args();
if ($arg_status){
print "ERROR: some arguments wrong\n";
exit $ERRORS{"UNKNOWN"};
}
# set alarmhandler for timeout handling
$SIG{'ALRM'} = sub {
print ("ERROR: plugin timed out after $opt_timeout seconds \n");
exit $ERRORS{"UNKNOWN"};
};
alarm($opt_timeout);
# let's see if the server wants to speak with us
my ($snmp_session,$snmp_error)=open_snmp_session($opt_hostname);
if ( ! defined ($snmp_session)) {
print "ERROR: Could not open connection: $snmp_error \n";
exit $ERRORS{'UNKNOWN'};
}
$snmp_session->translate(['-endofmibview'=>0,'-nosuchobject'=>0,'-nosuchinstance'=>0]);
if ( $opt_verbose ) {
printf("1st Measurement of Network-Interface IO-Load\n");
}
# get ifTable 1st Measurement
my $ifTable_1st=get_table($ifTable);
if ( $opt_verbose ) {
printf("Waiting %d seconds\n",WAIT_BETWEEN_MEASUREMENT);
}
# now we are waiting some seconds
sleep (WAIT_BETWEEN_MEASUREMENT);
if ( $opt_verbose ) {
printf("2nd Measurement of Network-Interface IO-Load\n");
}
# get ifTable 2nd Measurement
my $ifTable_2nd=get_table($ifTable);
$snmp_session->close;
if ( $opt_verbose ) {
print_ifTable ("1st Measurement",$ifTable_1st);
print_ifTable ("2nd Measurement",$ifTable_2nd);
}
my $perfdata="";
my $ifTableDiff=Build_Diff_Values();
foreach my $l_key (oid_lex_sort(keys(%{$ifTableDiff}))){
next if (!(oid_base_match($ifIndex,$l_key)));
my $l_val=$ifTableDiff->{$l_key};
next if ( $ifTableDiff->{$ifDescr.".".$l_val} ne $opt_interface );
my $InMB =$ifTableDiff->{$ifInOctets.".".$l_val};
if ( $InMB < 0 ) {
# check 32 bit overrun
$InMB += COUNTER_MAXVAL;
}
$InMB = $InMB /1024/1024;
my $OutMB=$ifTableDiff->{$ifOutOctets.".".$l_val};
if ( $OutMB < 0 ) {
# check 32 bit overrun
$OutMB += COUNTER_MAXVAL;
}
$OutMB = $OutMB /1024/1024;
# Calculate average values
my $InMBsec =$InMB / WAIT_BETWEEN_MEASUREMENT;
my $OutMBsec=$OutMB / WAIT_BETWEEN_MEASUREMENT;
# Build performance data line
$perfdata=sprintf("InMBsec=%.2f OutMBsec=%.2f",$InMBsec,$OutMBsec);
if ( $opt_verbose ) {
printf ("Interace found in SNMP-MIB-2 Table\n");
printf ("IndexNr : %d\n",$l_val);
printf ("Device : %s\n",$ifTableDiff->{$ifDescr.".".$l_val});
printf ("In Octets : %d (%.2f MB)(%.2f MB/sec)\n",$ifTableDiff->{$ifInOctets.".".$l_val},$InMB,$InMBsec);
printf ("Out Octets : %d (%.2f MB)(%.2f MB/sec)\n",$ifTableDiff->{$ifOutOctets.".".$l_val},$OutMB,$OutMBsec);
}
# in case we use some other calculated fields
my $checkval=$InMBsec;
my $txt ="In";
if ( $checkval < $opt_warn ) {
$msg = sprintf("%s OK - No Problems found (%s %.2f MB/s)",$opt_interface,$txt,$checkval);
$state = $ERRORS{'OK'};
}elsif ( $checkval < $opt_crit ) {
$msg = sprintf("%s WARN - %s %.2f MB/s",$opt_interface,$txt,$checkval);
$state = $ERRORS{'WARNING'};
}else{
$msg = sprintf("%s CRIT - %s %.2f MB/s",$opt_interface,$txt,$checkval);
$state = $ERRORS{'CRITICAL'};
}
last;
}
# attach performance data line
$msg.="|".$perfdata;
# and now "over and out"
print "$msg\n";
exit $state;
#--------------------------------------------------------------------------#
# S U B R O U T I N E S #
#--------------------------------------------------------------------------#
#--------------------------------------------------------------------------
sub open_snmp_session {
#--------------------------------------------------------------------------
my ($l_host)=@_;
my ($snmp_session,$snmp_error);
# open SNMP Session to Server
if ( $opt_snmpvers eq "3" ) {
if ( defined ($opt_authpasswd)) {
if ( defined ($opt_privpasswd)) {
($snmp_session,$snmp_error)=Net::SNMP->session(
-hostname => $l_host,
-port => $opt_port,
-timeout => 2,
-retries => 2,
-maxmsgsize => 16384,
-version => $opt_snmpvers,
-username => $opt_username,
-authpassword => $opt_authpasswd,
-authprotocol => $opt_authproto,
-privpassword => $opt_privpasswd,
-privprotocol => $opt_privproto,
);
} else {
($snmp_session,$snmp_error)=Net::SNMP->session(
-hostname => $l_host,
-port => $opt_port,
-timeout => 2,
-retries => 2,
-maxmsgsize => 16384,
-version => $opt_snmpvers,
-username => $opt_username,
-authpassword => $opt_authpasswd,
-authprotocol => $opt_authproto,
);
}
} else {
($snmp_session,$snmp_error)=Net::SNMP->session(
-hostname => $l_host,
-port => $opt_port,
-timeout => 2,
-retries => 2,
-maxmsgsize => 16384,
-version => $opt_snmpvers,
-username => $opt_username,
);
}
} else {
($snmp_session,$snmp_error)=Net::SNMP->session(
-hostname => $l_host,
-community => $opt_community,
-port => $opt_port,
-timeout => 2,
-retries => 2,
-maxmsgsize => 16384,
-version => $opt_snmpvers,
);
}
return ($snmp_session,$snmp_error);
}
#--------------------------------------------------------------------------
sub get_table {
#--------------------------------------------------------------------------
my ($l_oid)=@_;
my $l_snmp_result=$snmp_session->get_table(
-baseoid => $l_oid
);
#if ( ! defined ($l_snmp_result)) {
if ($snmp_session->error_status != 0) {
print "ERROR %d: get_table: ",$snmp_session->error_status,$snmp_session->error,"\n";
$snmp_session->close;
exit $ERRORS{'UNKNOWN'};
}
return $l_snmp_result;
}
#--------------------------------------------------------------------------
sub check_args {
#--------------------------------------------------------------------------
Getopt::Long::Configure('bundling');
GetOptions
("V" => \$opt_version,
"version" => \$opt_version,
"L" => \$opt_license,
"license" => \$opt_license,
"v" => \$opt_verbose,
"verbose" => \$opt_verbose,
"h|?" => \$opt_help,
"help" => \$opt_help,
"t=i" => \$opt_timeout,
"timeout=i" => \$opt_timeout,
"H=s" => \$opt_hostname,
"hostname=s" => \$opt_hostname,
"i=s" => \$opt_interface,
"interface=s" => \$opt_interface,
"C=s" => \$opt_community,
"community=s" => \$opt_community,
"p=i" => \$opt_port,
"port=i" => \$opt_port,
"s=s" => \$opt_snmpvers,
"snmpvers=s" => \$opt_snmpvers,
"u=s" => \$opt_username,
"username=s" => \$opt_username,
"o=s" => \$opt_authpasswd,
"authpass=s" => \$opt_authpasswd,
"r=s" => \$opt_authproto,
"authprot=s" => \$opt_authproto,
"O=s" => \$opt_privpasswd,
"privpass=s" => \$opt_privpasswd,
"R=s" => \$opt_privproto,
"privprot=s" => \$opt_privproto,
"w=s" => \$opt_warn,
"warn=s" => \$opt_warn,
"c=s" => \$opt_crit,
"crit=s" => \$opt_crit,
);
if ($opt_license) {
print_gpl($PROGNAME,$REVISION);
exit $ERRORS{'OK'};
}
if ($opt_version) {
print_revision($PROGNAME,$REVISION);
exit $ERRORS{'OK'};
}
if ($opt_help) {
print_help();
exit $ERRORS{'OK'};
}
if ( ! defined($opt_hostname)){
print "\nERROR: Hostname not defined\n\n";
print_usage();
exit $ERRORS{'UNKNOWN'};
}
if ( ! defined($opt_interface)){
print "\nERROR: Network interface not defined\n\n";
print_usage();
exit $ERRORS{'UNKNOWN'};
}
unless (defined $opt_snmpvers) {
$opt_snmpvers = DEFAULT_SNMPVERS;
}
if (($opt_snmpvers ne "1") && ($opt_snmpvers ne "2") && ($opt_snmpvers ne "3")) {
printf ("\nERROR: SNMP Version %s unknown\n",$opt_snmpvers);
print_usage();
exit $ERRORS{'UNKNOWN'};
}
unless (defined $opt_warn) {
print "\nERROR: parameter -w not defined\n\n";
print_usage();
exit ($ERRORS{'UNKNOWN'});
}
unless (defined $opt_crit) {
print "\nERROR: parameter -c not defined\n\n";
print_usage();
exit ($ERRORS{'UNKNOWN'});
}
if ( $opt_warn > $opt_crit) {
print "\nERROR: parameter -w greater than parameter -c\n\n";
print_usage();
exit ($ERRORS{'UNKNOWN'});
}
unless (defined $opt_timeout) {
$opt_timeout = DEFAULT_TIMEOUT;
}
unless (defined $opt_port) {
$opt_port = DEFAULT_PORT;
}
unless (defined $opt_community) {
$opt_community = DEFAULT_COMMUNITY;
}
if (defined $opt_privpasswd) {
unless (defined $opt_privproto) {
$opt_privproto = DEFAULT_PRIVPROTO;
}
}
if (defined $opt_authpasswd) {
unless (defined $opt_authproto) {
$opt_authproto = DEFAULT_AUTHPROTO;
}
}
if ($opt_snmpvers eq 3) {
unless (defined $opt_username) {
printf ("\nERROR: SNMP Version %s: please define username\n",$opt_snmpvers);
print_usage();
exit $ERRORS{'UNKNOWN'};
}
}
return $ERRORS{'OK'};
}
#--------------------------------------------------------------------------
sub print_usage {
#--------------------------------------------------------------------------
print "Usage: $PROGNAME [-h] [-L] [-t timeout] [-v] [-V] [-C community] [-p port] [-s 1|2|3] -H hostname -d netinterfacd -w -c \n\n";
print "SNMP version 3 specific: [-u username] [-o authpass] [-r authprot] [-O privpass] [-R privprot]\n";
}
#--------------------------------------------------------------------------
sub print_help {
#--------------------------------------------------------------------------
print_revision($PROGNAME,$REVISION);
printf("\n");
print_usage();
printf("\n");
printf(" Check Network Interface IO via SNMP-MIB-2\n\n");
printf("-t (--timeout) Timeout in seconds (default=%d)\n",DEFAULT_TIMEOUT);
printf("-H (--hostname) Host to monitor\n");
printf("-i (--interface) Network Interface to monitor\n");
printf("-s (--snmpvers) SNMP Version [1|2|3] (default=%d)\n",DEFAULT_SNMPVERS);
printf("-C (--community) SNMP Community (default=%s)\n",DEFAULT_COMMUNITY);
printf("-p (--port) SNMP Port (default=%d)\n",DEFAULT_PORT);
printf("-w (--warn) Parameter warning for MB In/Out/sec\n");
printf("-c (--crit) Parameter critical for MB In/Out/sec\n");
printf("-h (--help) Help\n");
printf("-V (--version) Programm version\n");
printf("-v (--verbose) Print some useful information\n");
printf("-L (--license) Print license information\n");
printf("\nSNMP version 3 specific arguments:\n");
printf("-u (--username) Security Name\n");
printf("-o (--authpassword) Authentication password\n");
printf("-r (--authprotocol) Authentication protocol [md5|sha]\n");
printf("-O (--privpassword) Privacy password\n");
printf("-R (--privprotocol) Privacy protocol [des|aes|3des]\n");
printf("\n");
}
#--------------------------------------------------------------------------
sub print_ifTable {
#--------------------------------------------------------------------------
my ($l_description,$ifTable)=@_;
printtable (sprintf("Interface Table - %s",$l_description));
print ("======================================\n");
foreach my $l_key (oid_lex_sort(keys(%{$ifTable}))){
next if (!(oid_base_match($ifIndex,$l_key)));
my $l_val=$ifTable->{$l_key};
next if ( $ifTable->{$ifDescr.".".$l_val} ne $opt_interface );
printtabular("Index", $l_val);
printtabular("Description", $ifTable->{$ifDescr.".".$l_val});
printtabular("Admin Status", $ifTable->{$ifAdminStatus.".".$l_val});
printtabular("Oper Status", $ifTable->{$ifOperStatus.".".$l_val});
printtabular("IN Octets", $ifTable->{$ifInOctets.".".$l_val});
printtabular("OUT Octets", $ifTable->{$ifOutOctets.".".$l_val});
printf("\n");
}
}
#--------------------------------------------------------------------------
sub printhead {
#--------------------------------------------------------------------------
my ($l_head)=@_;
printf ("\n%-40s\n",$l_head);
}
#--------------------------------------------------------------------------
sub printtable {
#--------------------------------------------------------------------------
my ($l_head)=@_;
printf ("%-40s\n",$l_head);
}
#--------------------------------------------------------------------------
sub printscalar {
#--------------------------------------------------------------------------
my ($l_arg,$l_oid)=@_;
printf ("%-35s: %-30s\n",$l_arg,$l_oid);
}
#--------------------------------------------------------------------------
sub printtabular {
#--------------------------------------------------------------------------
my ($l_arg,$l_oid)=@_;
printf ("%-35s: %-30s\n",$l_arg,$l_oid);
}
#--------------------------------------------------------------------------
sub Build_Diff_Values {
#--------------------------------------------------------------------------
my $hDiffTable={};
foreach my $l_key (oid_lex_sort(keys(%{$ifTable_2nd}))){
next if (!(oid_base_match($ifIndex,$l_key)));
my $index_2nd=$ifTable_2nd->{$l_key};
my $l_interface=$ifTable_2nd->{$ifDescr.".".$index_2nd};
next if ( $l_interface ne $opt_interface );
my $index_1st=Get_Index_Nr_1st_Table($l_interface);
my $IO_In =$ifTable_2nd->{$ifInOctets.".".$index_2nd} - $ifTable_1st->{$ifInOctets.".".$index_1st};
my $IO_Out =$ifTable_2nd->{$ifOutOctets.".".$index_2nd} - $ifTable_1st->{$ifOutOctets.".".$index_1st};
$hDiffTable->{$l_key} = $index_2nd;
$hDiffTable->{$ifDescr.".".$index_2nd} = $l_interface;
$hDiffTable->{$ifInOctets.".".$index_2nd} = $IO_In;
$hDiffTable->{$ifOutOctets.".".$index_2nd} = $IO_Out;
}
return($hDiffTable);
}
#--------------------------------------------------------------------------
sub Get_Index_Nr_1st_Table {
#--------------------------------------------------------------------------
my ($l_interface)=@_;
foreach my $l_key (keys(%{$ifTable_1st})){
next if (!(oid_base_match($ifIndex,$l_key)));
my $l_val=$ifTable_1st->{$l_key};
my $l_interface_1st=$ifTable_1st->{$ifDescr.".".$l_val};
next if ( $l_interface_1st ne $l_interface );
return($l_val);
}
return(undef);
}
#--------------------------------------------------------------------------
sub print_gpl {
#--------------------------------------------------------------------------
print <.
EOD
}
#--------------------------------------------------------------------------
sub print_revision {
#--------------------------------------------------------------------------
my ($l_prog,$l_revision)=@_;
print < -i bond0 -w 80 -c 90
for more information concerning this plugin call:
check_snmp_netifio -h
perldoc check_snmp_netifio
=head1 AUTHOR
Herbert Stadler, Austria (hestadler@gmx.at)
July 2009
This plugin is a contribution to the nagios community.
=head1 REQUIRED SOFTWARE
from search.cpan.org
Net::SNMP Package e.g: Net-SNMP-5.2.0.tar.gz
=head1 HOW TO CHECK THE SERVER FUNCTIONALITY
Example:
snmpwalk -On -c public -v 1 1.3.6.1.2.1.2.2
should return some lines
=head1 CONFIGURATION IN NAGIOS
Copy this plugin to the nagios plugin installation directory
e.g.: /usr/lib(64)/nagios/plugin
COMMAND DEFINITION:
# "check_snmp_netifio" command definition
define command{
command_name check_snmp_netifio
command_line $USER1$/check_snmp_netifio -H $HOSTADDRESS$ -i $ARG1$ -w $ARG2$ -c $ARG3$
}
=head1 PLUGIN HISTORY
Version 1.0 - 2009-07-01 first release
Version 1.1 - 2010-03-24 check error_status of snmp call
=head1 COPYRIGHT AND DISCLAIMER
Copyright (C) 2009 by Herbert Stadler
email: hestadler@gmx.at
License Information:
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 3 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, see .
=cut