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nagios-plugins/check_snmp/check_snmp_mem.pl

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#!/usr/bin/perl -w
############################## check_snmp_mem ##############
# Version : 1.1
# Date : Jul 09 2006
# Author : Patrick Proy (nagios at proy.org)
# Help : http://www.manubulon.com/nagios/
# Licence : GPL - http://www.fsf.org/licenses/gpl.txt
# Contrib : Jan Jungmann
# TODO :
#################################################################
#
# Help : ./check_snmp_mem.pl -h
#
use strict;
use Net::SNMP;
use Getopt::Long;
# Nagios specific
use lib "/usr/lib64/nagios/plugins/";
use lib "/usr/lib/nagios/plugins/";
use utils qw(%ERRORS $TIMEOUT);
#my $TIMEOUT = 15;
#my %ERRORS=('OK'=>0,'WARNING'=>1,'CRITICAL'=>2,'UNKNOWN'=>3,'DEPENDENT'=>4);
# SNMP Datas
# Net-snmp memory
my $nets_ram_free = "1.3.6.1.4.1.2021.4.6.0"; # Real memory free
my $nets_ram_total = "1.3.6.1.4.1.2021.4.5.0"; # Real memory total
my $nets_ram_cache = "1.3.6.1.4.1.2021.4.15.0"; # Real memory cached
my $nets_swap_free = "1.3.6.1.4.1.2021.4.4.0"; # swap memory free
my $nets_swap_total = "1.3.6.1.4.1.2021.4.3.0"; # Swap memory total
my @nets_oids = ($nets_ram_free,$nets_ram_total,$nets_swap_free,$nets_swap_total,$nets_ram_cache);
# Cisco
my $cisco_mem_pool = "1.3.6.1.4.1.9.9.48.1.1.1"; # Cisco memory pool
my $cisco_index = "1.3.6.1.4.1.9.9.48.1.1.1.2"; # memory pool name and index
my $cisco_valid = "1.3.6.1.4.1.9.9.48.1.1.1.4"; # Valid memory if 1
my $cisco_used = "1.3.6.1.4.1.9.9.48.1.1.1.5"; # Used memory
my $cisco_free = "1.3.6.1.4.1.9.9.48.1.1.1.6"; # Free memory
# .1 : type, .2 : name, .3 : alternate, .4 : valid, .5 : used, .6 : free, .7 : max free
# HP Procurve
my $hp_mem_pool = "1.3.6.1.4.1.11.2.14.11.5.1.1.2.2.1.1"; # HP memory pool
my $hp_mem_index = "1.3.6.1.4.1.11.2.14.11.5.1.1.2.2.1.1.1"; # memory slot index
my $hp_mem_total = "1.3.6.1.4.1.11.2.14.11.5.1.1.2.2.1.1.5"; # Total Bytes
my $hp_mem_free = "1.3.6.1.4.1.11.2.14.11.5.1.1.2.2.1.1.6"; # Free Bytes
my $hp_mem_free_seg = "1.3.6.1.4.1.11.2.14.11.5.1.1.2.2.1.1.3"; # Free segments
# AS/400
# Windows NT/2K/(XP?)
# check_snmp_storage.pl -C <community> -H <hostIP> -m "^Virtual Memory$" -w <warn %> -c <crit %>
# Globals
my $Version='1.1';
my $o_host = undef; # hostname
my $o_community = undef; # community
my $o_port = 161; # port
my $o_help= undef; # wan't some help ?
my $o_verb= undef; # verbose mode
my $o_version= undef; # print version
my $o_netsnmp= 1; # Check with netsnmp (default)
my $o_cisco= undef; # Check cisco router mem
my $o_hp= undef; # Check hp procurve mem
my $o_warn= undef; # warning level option
my $o_warnR= undef; # warning level for Real memory
my $o_warnS= undef; # warning levels for swap
my $o_crit= undef; # Critical level option
my $o_critR= undef; # critical level for Real memory
my $o_critS= undef; # critical level for swap
my $o_perf= undef; # Performance data option
my $o_cache= undef; # Include cached memory as used memory
my $o_timeout= undef; # Timeout (Default 5)
my $o_version2= undef; # use snmp v2c
# SNMPv3 specific
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
# functions
sub p_version { print "check_snmp_mem version : $Version\n"; }
sub print_usage {
print "Usage: $0 [-v] -H <host> -C <snmp_community> [-2] | (-l login -x passwd [-X pass -L <authp>,<privp>]) [-p <port>] -w <warn level> -c <crit level> [-I|-N|-E] [-f] [-m] [-t <timeout>] [-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 round ($$) {
sprintf "%.$_[1]f", $_[0];
}
sub help {
print "\nSNMP Memory Monitor for Nagios version ",$Version,"\n";
print "(c)2004-2006 to my cat Ratoune - Author: Patrick Proy\n\n";
print_usage();
print <<EOT;
-v, --verbose
print extra debugging information (including interface list on the system)
-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 host's SNMP agent (implies SNMP v1 or v2c with option)
-2, --v2c
Use snmp v2c
-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 protocole (des|aes : default des)
-P, --port=PORT
SNMP port (Default 161)
-w, --warn=INTEGER | INT,INT
warning level for memory in percent (0 for no checks)
Default (-N switch) : comma separated level for Real Memory and Swap
-I switch : warning level
-c, --crit=INTEGER | INT,INT
critical level for memory in percent (0 for no checks)
Default (-N switch) : comma separated level for Real Memory and Swap
-I switch : critical level
-N, --netsnmp (default)
check linux memory & swap provided by Net SNMP
-m, --memcache
include cached memory in used memory (only with Net-SNMP)
-I, --cisco
check cisco memory (sum of all memory pools)
-E, --hp
check HP proccurve memory
-f, --perfdata
Performance data output
-t, --timeout=INTEGER
timeout for SNMP in seconds (Default: 5)
-V, --version
prints version number
EOT
}
# For verbose output
sub verb { my $t=shift; print $t,"\n" if defined($o_verb) ; }
# Get the alarm signal (just in case snmp timout screws up)
$SIG{'ALRM'} = sub {
print ("ERROR: Alarm signal (Nagios time-out)\n");
exit $ERRORS{"UNKNOWN"};
};
sub check_options {
Getopt::Long::Configure ("bundling");
GetOptions(
'v' => \$o_verb, 'verbose' => \$o_verb,
'h' => \$o_help, 'help' => \$o_help,
'H:s' => \$o_host, 'hostname:s' => \$o_host,
'p:i' => \$o_port, 'port:i' => \$o_port,
'C:s' => \$o_community, 'community:s' => \$o_community,
'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,
'V' => \$o_version, 'version' => \$o_version,
'I' => \$o_cisco, 'cisco' => \$o_cisco,
'N' => \$o_netsnmp, 'netsnmp' => \$o_netsnmp,
'E' => \$o_hp, 'hp' => \$o_hp,
'2' => \$o_version2, 'v2c' => \$o_version2,
'c:s' => \$o_crit, 'critical:s' => \$o_crit,
'w:s' => \$o_warn, 'warn:s' => \$o_warn,
'm' => \$o_cache, 'memcache' => \$o_cache,
'f' => \$o_perf, 'perfdata' => \$o_perf
);
if (defined ($o_help) ) { help(); exit $ERRORS{"UNKNOWN"}};
if (defined($o_version)) { p_version(); exit $ERRORS{"UNKNOWN"}};
if ( ! defined($o_host) ) # check host and filter
{ print "No host defined!\n";print_usage(); exit $ERRORS{"UNKNOWN"}}
# check snmp information
if ( !defined($o_community) && (!defined($o_login) || !defined($o_passwd)) )
{ print "Put snmp login info!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if ((defined($o_login) || defined($o_passwd)) && (defined($o_community) || defined($o_version2)) )
{ print "Can't mix snmp v1,2c,3 protocols!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if (defined ($v3protocols)) {
if (!defined($o_login)) { print "Put snmp V3 login info with protocols!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
my @v3proto=split(/,/,$v3protocols);
if ((defined ($v3proto[0])) && ($v3proto[0] ne "")) {$o_authproto=$v3proto[0]; } # Auth protocol
if (defined ($v3proto[1])) {$o_privproto=$v3proto[1]; } # Priv protocol
if ((defined ($v3proto[1])) && (!defined($o_privpass))) {
print "Put snmp V3 priv login info with priv protocols!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
}
if (defined($o_timeout) && (isnnum($o_timeout) || ($o_timeout < 2) || ($o_timeout > 60)))
{ print "Timeout must be >1 and <60 !\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
if (!defined($o_timeout)) {$o_timeout=5;}
#Check Warning and crit are present
if ( ! defined($o_warn) || ! defined($o_crit))
{ print "Put warning and critical values!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}}
# Get rid of % sign
$o_warn =~ s/\%//g;
$o_crit =~ s/\%//g;
# if -N or -E switch , undef $o_netsnmp
if (defined($o_cisco) || defined($o_hp) ) {
$o_netsnmp=undef;
if ( isnnum($o_warn) || isnnum($o_crit))
{ print "Numeric value for warning or critical !\n";print_usage(); exit $ERRORS{"UNKNOWN"} }
if ( ($o_crit != 0) && ($o_warn > $o_crit) )
{ print "warning <= critical ! \n";print_usage(); exit $ERRORS{"UNKNOWN"}}
}
if (defined($o_netsnmp)) {
my @o_warnL=split(/,/ , $o_warn);
my @o_critL=split(/,/ , $o_crit);
if (($#o_warnL != 1) || ($#o_critL != 1))
{ print "2 warnings and critical !\n";print_usage(); exit $ERRORS{"UNKNOWN"}}
for (my $i=0;$i<2;$i++) {
if ( isnnum($o_warnL[$i]) || isnnum($o_critL[$i]))
{ print "Numeric value for warning or critical !\n";print_usage(); exit $ERRORS{"UNKNOWN"} }
if (($o_critL[$i]!= 0) && ($o_warnL[$i] > $o_critL[$i]))
{ print "warning <= critical ! \n";print_usage(); exit $ERRORS{"UNKNOWN"}}
if ( $o_critL[$i] > 100)
{ print "critical percent must be < 100 !\n";print_usage(); exit $ERRORS{"UNKNOWN"}}
}
$o_warnR=$o_warnL[0];$o_warnS=$o_warnL[1];
$o_critR=$o_critL[0];$o_critS=$o_critL[1];
}
}
########## MAIN #######
check_options();
# Check gobal timeout if snmp screws up
if (defined($TIMEOUT)) {
verb("Alarm at $TIMEOUT");
alarm($TIMEOUT);
} else {
verb("no timeout defined : $o_timeout + 10");
alarm ($o_timeout+10);
}
# Connect to host
my ($session,$error);
if ( defined($o_login) && defined($o_passwd)) {
# SNMPv3 login
if (!defined ($o_privpass)) {
verb("SNMPv3 AuthNoPriv login : $o_login, $o_authproto");
($session, $error) = Net::SNMP->session(
-hostname => $o_host,
-version => '3',
-username => $o_login,
-authpassword => $o_passwd,
-authprotocol => $o_authproto,
-timeout => $o_timeout
);
} else {
verb("SNMPv3 AuthPriv login : $o_login, $o_authproto, $o_privproto");
($session, $error) = Net::SNMP->session(
-hostname => $o_host,
-version => '3',
-username => $o_login,
-authpassword => $o_passwd,
-authprotocol => $o_authproto,
-privpassword => $o_privpass,
-privprotocol => $o_privproto,
-timeout => $o_timeout
);
}
} else {
if (defined ($o_version2)) {
# SNMPv2 Login
verb("SNMP v2c login");
($session, $error) = Net::SNMP->session(
-hostname => $o_host,
-version => 2,
-community => $o_community,
-port => $o_port,
-timeout => $o_timeout
);
} else {
# SNMPV1 login
verb("SNMP v1 login");
($session, $error) = Net::SNMP->session(
-hostname => $o_host,
-community => $o_community,
-port => $o_port,
-timeout => $o_timeout
);
}
}
if (!defined($session)) {
printf("ERROR opening session: %s.\n", $error);
exit $ERRORS{"UNKNOWN"};
}
# Global variable
my $resultat=undef;
########### Cisco memory check ############
if (defined ($o_cisco)) {
# Get Cisco memory table
$resultat = (Net::SNMP->VERSION < 4) ?
$session->get_table($cisco_mem_pool)
:$session->get_table(Baseoid => $cisco_mem_pool);
if (!defined($resultat)) {
printf("ERROR: Description table : %s.\n", $session->error);
$session->close;
exit $ERRORS{"UNKNOWN"};
}
my (@oid,@index)=(undef,undef);
my $nindex=0;
foreach my $key ( keys %$resultat) {
verb("OID : $key, Desc : $$resultat{$key}");
if ( $key =~ /$cisco_index/ ) {
@oid=split (/\./,$key);
$index[$nindex++] = pop(@oid);
}
}
# Check if at least 1 memory pool exists
if ($nindex == 0) {
printf("ERROR: No memory pools found");
$session->close;
exit $ERRORS{"UNKNOWN"};
}
# Test every memory pool
my ($c_output,$prct_free)=(undef,undef);
my ($warn_s,$crit_s)=(0,0);
my ($used,$free)=(0,0);
foreach (@index) {
$c_output .="," if defined ($c_output);
if ( $$resultat{$cisco_valid . "." . $_} == 1 ) {
$used += $$resultat{$cisco_used . "." . $_};
$free += $$resultat{$cisco_free . "." . $_};
$prct_free=round($$resultat{$cisco_used . "." . $_}*100/($$resultat{$cisco_free . "." . $_}+$$resultat{$cisco_used . "." . $_}) ,0);
$c_output .= $$resultat{$cisco_index . "." . $_} . ":" . $prct_free . "%";
if (($o_crit!=0)&&($o_crit <= $prct_free)) {
$crit_s =1;
} elsif (($o_warn!=0)&&($o_warn <= $prct_free)) {
$warn_s=1;
}
} else {
$c_output .= $$resultat{$cisco_index . "." . $_} . ": INVALID";
$crit_s =1;
}
}
my $total=$used+$free;
$prct_free=round($used*100/($total),0);
verb("Total used : $used, free: $free, output : $c_output");
my $c_status="OK";
$c_output .=" : " . $prct_free ."% : ";
if ($crit_s == 1 ) {
$c_output .= " > " . $o_crit ;
$c_status="CRITICAL";
} else {
if ($warn_s == 1 ) {
$c_output.=" > " . $o_warn;
$c_status="WARNING";
}
}
$c_output .= " ; ".$c_status;
if (defined ($o_perf)) {
$c_output .= " | ram_used=" . $used.";";
$c_output .= ($o_warn ==0)? ";" : round($o_warn * $total/100,0).";";
$c_output .= ($o_crit ==0)? ";" : round($o_crit * $total/100,0).";";
$c_output .= "0;" . $total ;
}
$session->close;
print "$c_output \n";
exit $ERRORS{$c_status};
}
########### HP Procurve memory check ############
if (defined ($o_hp)) {
# Get hp memory table
$resultat = (Net::SNMP->VERSION < 4) ?
$session->get_table($hp_mem_pool)
:$session->get_table(Baseoid => $hp_mem_pool);
if (!defined($resultat)) {
printf("ERROR: Description table : %s.\n", $session->error);
$session->close;
exit $ERRORS{"UNKNOWN"};
}
my (@oid,@index)=(undef,undef);
my $nindex=0;
foreach my $key ( keys %$resultat) {
verb("OID : $key, Desc : $$resultat{$key}");
if ( $key =~ /$hp_mem_index/ ) {
@oid=split (/\./,$key);
$index[$nindex++] = pop(@oid);
}
}
# Check if at least 1 memory slots exists
if ($nindex == 0) {
printf("ERROR: No memory slots found");
$session->close;
exit $ERRORS{"UNKNOWN"};
}
# Consolidate the datas
my ($total,$free)=(0,0);
my ($c_output,$prct_free)=(undef,undef);
foreach (@index) {
$c_output .="," if defined ($c_output);
$total += $$resultat{$hp_mem_total . "." . $_};
$free += $$resultat{$hp_mem_free . "." . $_};
$c_output .= "Slot " . $$resultat{$hp_mem_index . "." . $_} . ":"
.round(
100 - ($$resultat{$hp_mem_free . "." . $_} *100 /
$$resultat{$hp_mem_total . "." . $_}) ,0)
. "%";
}
my $used = $total - $free;
$prct_free=round($used*100/($total),0);
verb("Used : $used, Free: $free, Output : $c_output");
my $c_status="OK";
$c_output .=" : " . $prct_free ."% : ";
if (($o_crit!=0)&&($o_crit <= $prct_free)) {
$c_output .= " > " . $o_crit ;
$c_status="CRITICAL";
} else {
if (($o_warn!=0)&&($o_warn <= $prct_free)) {
$c_output.=" > " . $o_warn;
$c_status="WARNING";
}
}
$c_output .= " ; ".$c_status;
if (defined ($o_perf)) {
$c_output .= " | ram_used=" . $used.";";
$c_output .= ($o_warn ==0)? ";" : round($o_warn * $total/100,0).";";
$c_output .= ($o_crit ==0)? ";" : round($o_crit * $total/100,0).";";
$c_output .= "0;" . $total ;
}
$session->close;
print "$c_output \n";
exit $ERRORS{$c_status};
}
########### Net snmp memory check ############
if (defined ($o_netsnmp)) {
# Get NetSNMP memory values
$resultat = (Net::SNMP->VERSION < 4) ?
$session->get_request(@nets_oids)
:$session->get_request(-varbindlist => \@nets_oids);
if (!defined($resultat)) {
printf("ERROR: netsnmp : %s.\n", $session->error);
$session->close;
exit $ERRORS{"UNKNOWN"};
}
my ($realused,$swapused)=(undef,undef);
$realused= defined($o_cache) ?
($$resultat{$nets_ram_total}-$$resultat{$nets_ram_free})/$$resultat{$nets_ram_total}
:
($$resultat{$nets_ram_total}-($$resultat{$nets_ram_free}+$$resultat{$nets_ram_cache}))/$$resultat{$nets_ram_total};
if($$resultat{$nets_ram_total} == 0) { $realused = 0; }
$swapused= ($$resultat{$nets_swap_total} == 0) ? 0 :
($$resultat{$nets_swap_total}-$$resultat{$nets_swap_free})/$$resultat{$nets_swap_total};
$realused=round($realused*100,0);
$swapused=round($swapused*100,0);
defined($o_cache) ?
verb ("Ram : $$resultat{$nets_ram_free} / $$resultat{$nets_ram_total} : $realused")
:
verb ("Ram : $$resultat{$nets_ram_free} ($$resultat{$nets_ram_cache} cached) / $$resultat{$nets_ram_total} : $realused");
verb ("Swap : $$resultat{$nets_swap_free} / $$resultat{$nets_swap_total} : $swapused");
my $n_status="OK";
my $n_output="Ram : " . $realused . "%, Swap : " . $swapused . "% :";
if ((($o_critR!=0)&&($o_critR <= $realused)) || (($o_critS!=0)&&($o_critS <= $swapused))) {
$n_output .= " > " . $o_critR . ", " . $o_critS;
$n_status="CRITICAL";
} else {
if ((($o_warnR!=0)&&($o_warnR <= $realused)) || (($o_warnS!=0)&&($o_warnS <= $swapused))) {
$n_output.=" > " . $o_warnR . ", " . $o_warnS;
$n_status="WARNING";
}
}
$n_output .= " ; ".$n_status;
if (defined ($o_perf)) {
if (defined ($o_cache)) {
$n_output .= " | ram_used=" . ($$resultat{$nets_ram_total}-$$resultat{$nets_ram_free}).";";
}
else {
$n_output .= " | ram_used=" . ($$resultat{$nets_ram_total}-$$resultat{$nets_ram_free}-$$resultat{$nets_ram_cache}).";";
}
$n_output .= ($o_warnR ==0)? ";" : round($o_warnR * $$resultat{$nets_ram_total}/100,0).";";
$n_output .= ($o_critR ==0)? ";" : round($o_critR * $$resultat{$nets_ram_total}/100,0).";";
$n_output .= "0;" . $$resultat{$nets_ram_total}. " ";
$n_output .= "swap_used=" . ($$resultat{$nets_swap_total}-$$resultat{$nets_swap_free}).";";
$n_output .= ($o_warnS ==0)? ";" : round($o_warnS * $$resultat{$nets_swap_total}/100,0).";";
$n_output .= ($o_critS ==0)? ";" : round($o_critS * $$resultat{$nets_swap_total}/100,0).";";
$n_output .= "0;" . $$resultat{$nets_swap_total};
}
$session->close;
print "$n_output \n";
exit $ERRORS{$n_status};
}
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