check linux stats Plugin (NRPE)
Jump to navigation
Jump to search
The script below requires Sys::Statistics::Linux, to install on Ubuntu run apt-get install libsys-statistics-linux-perl
#!/usr/bin/perl
# ---------------------------------------------------- #
# File : check_linux_stats
# Author : Damien SIAUD
# Email : plugmon@free.fr
# Date : 07/12/2009
# Rev. Date : 07/05/2010
# Rev. Date : 07/01/2013
# ---------------------------------------------------- #
# This script require Sys::Statistics::Linux
#
# Plugin check for nagios
#
# 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 <http://www.gnu.org/licenses/>.
#
# ---------------------------------------------------- #
use FindBin;
use lib $FindBin::Bin;
#use lib "/usr/local/nagios/libexec";
use utils qw($TIMEOUT %ERRORS &print_revision &support);
use Getopt::Long;
use Sys::Statistics::Linux;
use Sys::Statistics::Linux::Processes;
use Sys::Statistics::Linux::SysInfo;
#use Data::Dumper;
use vars qw($script_name $script_version $o_sleep $o_pattern $o_cpu $o_procs $o_process $o_mem $o_net $o_disk $o_io $o_load $o_file $o_socket $o_paging $o_uptime $o_help $o_version $o_warning $o_critical $o_unit);
use strict;
# --------------------------- globals -------------------------- #
$script_name = "check_linux_stats";
$script_version = "1.4.1";
$o_help = undef;
$o_pattern = undef;
$o_version = undef;
$o_warning = 0;
$o_critical = 0;
$o_sleep = 1;
$o_unit = "MB";
my $status = 'UNKNOWN';
# ---------------------------- main ----------------------------- #
check_options();
if($o_cpu){
check_cpu();
}
elsif($o_mem){
check_mem();
}
elsif($o_disk){
check_disk();
}
elsif($o_io){
check_io();
}
elsif($o_net){
check_net();
}
elsif($o_load){
check_load();
}
elsif($o_file){
check_file();
}
elsif($o_procs){
check_procs();
}
elsif($o_socket){
check_socket();
}
elsif($o_process){
check_process();
}
elsif($o_paging){
check_paging();
}
elsif($o_uptime){
check_uptime();
}
else {
help();
}
print "\n";
exit $ERRORS{$status};
sub check_cpu {
my $lxs = Sys::Statistics::Linux->new(cpustats => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
if(defined($stat->cpustats)) {
$status = "OK";
my $cpu = $stat->cpustats->{cpu};
my $cpu_used=sprintf("%.2f", (100-$cpu->{idle}));
if ($cpu_used >= $o_critical) {
$status = "CRITICAL";
}
elsif ($cpu_used >= $o_warning) {
$status = "WARNING";
}
my $perfdata .= "|"
."idle=$cpu->{idle}%;$o_warning;$o_critical "
."user=$cpu->{user}% "
."system=$cpu->{system}% "
."iowait=$cpu->{iowait}%";
$perfdata .= " steal=$cpu->{steal}%" if(defined($cpu->{steal}));
print "CPU $status : idle $cpu->{idle}% $perfdata";
}
else {
print "No data";
}
}
sub check_procs {
my $lxs = Sys::Statistics::Linux->new(procstats => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
if(defined($stat->procstats)) {
$status = "OK";
my $procs = $stat->procstats;
if($procs->{count} >= $o_critical) {
$status = "CRITICAL";
}
elsif ($procs->{count} >= $o_warning) {
$status = "WARNING";
}
my $perfdata .= "|"
."count=$procs->{count};$o_warning;$o_critical "
."runqueue=$procs->{runqueue} "
."blocked=$procs->{blocked} "
."running=$procs->{running} "
."new=$procs->{new}";
print "PROCS $status : count $procs->{count} $perfdata";
}
}
sub check_process {
my $return_str = "";
my $perfdata = "";
# pidfiles
my @pids = ();
for my $file (split(/,/, $o_pattern)) {
open FILE, $file or die "Could not read from $file, program halting.";
# read the record, and chomp off the newline
chomp(my $pid = <FILE>);
close FILE;
if($pid=~/^\d+$/){
push @pids,$pid;
}
}
if($#pids>-1) {
my $lxs = Sys::Statistics::Linux::Processes->new(pids => \@pids);
$lxs->init;
sleep $o_sleep;
my $processes = $lxs->get;
my @pname = ();
if(defined($processes)) {
$status = "OK";
my $crit = 0; #critical counter
my $warn = 0; #warning counter
foreach my $process (keys (%$processes)) {
my $vsize = $processes->{$process}->{vsize};
my $nswap = $processes->{$process}->{nswap};
my $cnswap = $processes->{$process}->{cnswap};
my $cpu = $processes->{$process}->{cpu};
my $cmd = $processes->{$process}->{cmd};
$cmd =~s/\W+//g;
if($vsize >= $o_critical) {$crit++; push @pname,$cmd;}
elsif($vsize >= $o_warning){ $warn++; push @pname,$cmd;}
$perfdata .= "|"
.$cmd."_vsize=$vsize;$o_warning;$o_critical "
.$cmd."_nswap=$nswap "
.$cmd."_cnswap=$cnswap "
.$cmd."_cpu=$cpu";
}
if($crit>0) {$status="CRITICAL";}
elsif($warn>0) {$status="WARNING";}
}
print "PROCESSES $status : ".join(',',@pname)." $perfdata";
}
}
sub check_socket {
my $lxs = Sys::Statistics::Linux->new(sockstats => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
if(defined($stat->sockstats)) {
$status = "OK";
my $socks = $stat->sockstats;
if($socks->{used} >= $o_critical) {
$status = "CRITICAL";
}
elsif($socks->{used} >= $o_warning) {
$status = "WARNING";
}
my $perfdata .= "|"
."used=$socks->{used};$o_warning;$o_critical "
."tcp=$socks->{tcp} "
."udp=$socks->{udp} raw=$socks->{raw}";
print "SOCKET USAGE $status : used $socks->{used} $perfdata";
}
else {
print "No data";
}
}
sub check_file {
my $lxs = Sys::Statistics::Linux->new(filestats => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
if(defined($stat->filestats)) {
$status = "OK";
my $file = $stat->filestats;
my ($fh_crit,$inode_crit) = split(/,/,$o_critical);
my ($fh_warn,$inode_warn) = split(/,/,$o_warning);
if(($file->{fhalloc}>=$fh_crit)||($file->{inalloc}>=$inode_crit)) {
$status = "CRITICAL";
}
elsif(($file->{fhalloc}>=$fh_warn)||($file->{inalloc}>=$inode_warn)) {
$status = "WARNING";
}
my $perfdata .= "|"
."fhalloc=$file->{fhalloc};$fh_warn;$fh_crit;$file->{fhmax} "
."inalloc=$file->{inalloc};$inode_warn;$inode_crit;$file->{inmax} "
."dentries=$file->{dentries}";
print "OPEN FILES $status allocated: $file->{fhalloc} (inodes: $file->{inalloc}) $perfdata";
}
else {
print "No data";
}
}
sub check_mem {
my $lxs = Sys::Statistics::Linux->new(memstats => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
if(defined($stat->memstats)) {
$status = "OK";
my ($mem_crit,$swap_crit) = split(/,/,$o_critical);
my ($mem_warn,$swap_warn) = split(/,/,$o_warning);
my $mem = $stat->memstats;
my $memcached = sprintf("%.2f", ($mem->{cached}/$mem->{memtotal})*100)||0;
my $memused = sprintf("%.2f", (($mem->{memused} - $mem->{cached})/$mem->{memtotal})*100);
my $active = sprintf("%.2f", ($mem->{active}/$mem->{memtotal})*100)||0;
my $swapused = 0;
my $swapcached = 0;
if($mem->{swaptotal}>0) {
$swapused = sprintf("%.2f", ($mem->{swapused}/$mem->{swaptotal})*100);
$swapcached = sprintf("%.2f", ($mem->{swapcached}/$mem->{swaptotal})*100);
}
if(($memused>=$mem_crit)||(($swapused>=$swap_crit) && ($swapused>0))) {
$status = "CRITICAL";
}
elsif (($memused>=$mem_warn)||(($swapused>=$swap_warn) && ($swapused>0))) {
$status = "WARNING";
}
my $perfdata .= "|"
."MemUsed=$memused%;$mem_warn;$mem_crit "
."SwapUsed=$swapused%;$swap_warn;$swap_crit "
."MemCached=$memcached% "
."SwapCached=$swapcached% "
."Active=$active%";
print "MEMORY $status : Mem used: $memused%, Swap used: $swapused% $perfdata";
}
else {
print "No data";
}
}
sub check_disk {
my $lxs = Sys::Statistics::Linux->new(diskusage => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
my $return_str = "";
my $perfdata = "";
if(defined($stat->diskusage)) {
$status = "OK";
my $disk = $stat->diskusage;
if(!defined($o_pattern)){ $o_pattern = 'all';}
my $checkthis;
map {$checkthis->{$_}++} split(/,/, $o_pattern);
my $crit = 0; #critical counter
my $warn = 0; #warning counter
foreach my $device (keys (%$disk)) {
my $usage = $disk->{$device}->{usage}; # KB
my $free = $disk->{$device}->{free}; # KB
my $total = $disk->{$device}->{total}; # KB
my $mountpoint = $disk->{$device}->{mountpoint};
my $percentused = sprintf("%.2f", ($usage/$total)*100);
my $percentfree = sprintf("%.2f", ($free/$total)*100);
if(defined($checkthis->{$mountpoint})||defined($checkthis->{all})){
$return_str .= " $mountpoint $percentfree% free";
if($o_unit =~ /\%/) {
if($percentfree<=$o_critical){ $crit++;}
elsif($percentfree<=$o_warning){ $warn++;}
$perfdata .= " $mountpoint=$usage".'KB';
}
else {
# KB
my $tmpfree = $free;
my $tmpusage = $usage;
my $tmptotal = $total;
if($o_unit =~ /MB/i) {
$tmpfree = sprintf("%.2f", ($free/1024));
$tmpusage = sprintf("%.2f", ($usage/1024));
$tmptotal = sprintf("%.2f", ($total/1024));
}
elsif($o_unit =~ /GB/i) {
$tmpfree = sprintf("%.2f", ($free/1048576));
$tmpusage = sprintf("%.2f", ($usage/1048576));
$tmptotal = sprintf("%.2f", ($total/1048576));
}
if($tmpfree<=$o_warning){ $warn++;}
elsif($tmpfree<=$o_critical){ $crit++;}
$perfdata .= " $mountpoint=$usage$o_unit";
}
}
}
if($crit>0) {$status="CRITICAL";}
elsif($warn>0) {$status="WARNING";}
}
print "DISK $status used : $return_str |$perfdata";
}
sub check_io {
my $lxs = Sys::Statistics::Linux->new(diskstats => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
my $perfdata = "";
if(defined($stat->diskstats)) {
$status = "OK";
my $disk = $stat->diskstats;
if(!defined($o_pattern)){ $o_pattern = 'all';}
my $checkthis;
map {$checkthis->{$_}++} split(/,/, $o_pattern);
my ($read_crit,$write_crit) = split(/,/,$o_critical);
my ($read_warn,$write_warn) = split(/,/,$o_warning);
my $crit = 0; #critical counter
my $warn = 0; #warning counter
foreach my $device (keys (%$disk)) {
my $rdreq = $disk->{$device}->{rdreq};
my $wrtreq = $disk->{$device}->{wrtreq};
my $ttreq = $disk->{$device}->{ttreq};
my $rdbyt = $disk->{$device}->{rdbyt};
my $wrtbyt = $disk->{$device}->{wrtbyt};
my $ttbyt = $disk->{$device}->{ttbyt};
if(defined($checkthis->{$device})||defined($checkthis->{all})){
if($o_unit =~ /BYTES/i) {
if(($rdbyt>=$read_crit)||($wrtbyt>=$write_crit)){ $crit++;}
elsif(($rdbyt>=$read_warn)||($wrtbyt>=$write_warn)){ $warn++;}
$perfdata .= "|"
.$device."_read=$rdbyt;$read_warn;$read_crit "
.$device."_write=$wrtbyt;$write_warn;$write_crit";
}
else {
if(($rdreq>=$read_crit)||($wrtreq>=$write_crit)){ $crit++;}
elsif(($rdreq>=$read_warn)||($wrtreq>=$write_warn)){ $warn++;}
$perfdata .= "|"
.$device."_read=$rdreq;$read_warn;$read_crit "
.$device."_write=$wrtreq;$write_warn;$write_crit";
}
}
}
if($crit>0) {$status="CRITICAL";}
elsif($warn>0) {$status="WARNING";}
print "DISK IO $status $perfdata";
}
else {
print "No data";
}
}
sub check_net {
my $lxs = Sys::Statistics::Linux->new(netstats => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
my $return_str = "";
my $perfdata = "";
if(defined($stat->netstats)) {
$status = "OK";
my $net = $stat->netstats;
if(!defined($o_pattern)){ $o_pattern = 'all';}
my $checkthis;
map {$checkthis->{$_}++} split(/,/, $o_pattern);
my $crit = 0; #critical counter
my $warn = 0; #warning counter
foreach my $device (keys (%$net)) {
my $txbyt = $net->{$device}->{txbyt};
my $rxerrs = $net->{$device}->{rxerrs};
my $ttbyt = $net->{$device}->{ttbyt};
my $txerrs = $net->{$device}->{txerrs};
my $txdrop = $net->{$device}->{txdrop};
my $txcolls = $net->{$device}->{txcolls};
my $rxbyt = $net->{$device}->{rxbyt};
my $rxdrop = $net->{$device}->{rxdrop};
if(defined($checkthis->{$device})||defined($checkthis->{all})){
if($ttbyt>=$o_critical){ $crit++;}
elsif($ttbyt>=$o_warning){ $warn++;}
$return_str .= $device.":".bytes_to_readable($ttbyt)." ";
$perfdata .= "|"
.$device."_txbyt=".$txbyt."B "
.$device."_txerrs=".$txerrs."B "
.$device."_rxbyt=".$rxbyt."B "
.$device."_rxerrs=".$rxerrs."B";
}
}
if($crit>0) {$status="CRITICAL";}
elsif($warn>0) {$status="WARNING";}
print "NET USAGE $status $return_str $perfdata";
}
}
sub check_load {
my $lxs = Sys::Statistics::Linux->new(loadavg => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
if(defined($stat->loadavg)) {
$status = "OK";
my $load = $stat->loadavg;
my ($warn_1,$warn_5,$warn_15) = split(/,/,$o_warning);
my ($crit_1,$crit_5,$crit_15) = split(/,/,$o_critical);
if(($load->{avg_1}>=$crit_1)||($load->{avg_5}>=$crit_5)||($load->{avg_15}>=$crit_15)) {
$status = "CRITICAL";
}
elsif(($load->{avg_1}>=$warn_1)||($load->{avg_5}>=$warn_5)||($load->{avg_15}>=$warn_15)) {
$status = "WARNING";
}
my $perfdata = "|"
."load1=$load->{avg_1};$warn_1;$crit_1;0 "
."load5=$load->{avg_5};$warn_5;$crit_5;0 "
."load15=$load->{avg_15};$warn_15;$crit_15;0";
print "LOAD AVERAGE $status : $load->{avg_1},$load->{avg_5},$load->{avg_15} $perfdata";
}
else {
print "No data";
}
}
sub check_paging {
my $lxs = Sys::Statistics::Linux->new(pgswstats => 1);
$lxs->init;
sleep $o_sleep;
my $stat = $lxs->get;
if(defined($stat->pgswstats)) {
$status = "OK";
my $page = $stat->pgswstats;
my ($warn_in,$warn_out) = split(/,/,$o_warning);
my ($crit_in,$crit_out) = split(/,/,$o_critical);
if(($page->{pgpgin}>=$crit_in)||($page->{pgpgout}>=$crit_out)) {
$status = "CRITICAL";
}
elsif(($page->{pgpgin}>=$warn_in)||($page->{pgpgout}>=$warn_out)) {
$status = "WARNING";
}
my $perfdata = "|"
."pgpgin=$page->{pgpgin};$warn_in;$crit_in;0 "
."pgpgout=$page->{pgpgout};$warn_out;$crit_out;0 "
."pswpin=$page->{pswpin} pswpout=$page->{pswpout}";
print "Paging $status : in:$page->{pgpgin},out:$page->{pgpgout} $perfdata";
}
else {
print "No data";
}
}
sub check_uptime {
# Read the uptime in seconds from /proc/uptime
open FILE, "< /proc/uptime" or return ("Cannot open /proc/uptime: $!");
my ($uptime, undef) = split / /, <FILE>;
close FILE;
if(defined($uptime)) {
$status = "OK";
my $days = int($uptime / 86400);
my $seconds = $uptime % 86400;
my $hours = int($seconds / 3600);
$seconds = $seconds % 3600;
my $minutes = int($seconds / 60);
$seconds = $seconds % 60;
$status = "WARNING" if($o_warning && (int($uptime/60))<=$o_warning);
print "$status : up $days days, "
.sprintf("%02d", $hours).":"
.sprintf("%02d", $minutes).":"
.sprintf("%02d", $seconds)
." |uptime=".int($uptime);
}
else {
print "No data";
}
}
sub usage {
print "Usage: $0 -C|-P|-M|-N|-D|-I|-L|-F|-S|-W|-U -p <pattern> -w <warning> -c <critical> [-s <sleep>] [-u <unit>] [-V] [-h]\n";
}
sub version {
print "$script_name v$script_version\n";
}
sub help {
version();
usage();
print <<HELP;
-h, --help
print this help message
-C, --cpu=CPU USAGE
-P, --procs
-M, --memory=MEMORY USAGE
-N, --network=NETWORK USAGE
-D, --disk=DISK USAGE
-I, --io=DISK IO USAGE
-L, --load=LOAD AVERAGE
-F, --file=FILE STATS
-S, --socket=SOCKET STATS
-W, --paging=PAGING AND SWAPPING STATS
-U, --uptime
-p, --pattern
eth0,eth1...sda1,sda2.../usr,/tmp
-w, --warning
-c, --critical
-s, --sleep
-u, --unit
%, KB, MB or GB left on disk usage, default : MB
REQS OR BYTES on disk io statistics, default : REQS
-V, --version
version number
ex :
Memory usage : perl check_linux_stats.pl -M -w 90 -c 95
Cpu usage : perl check_linux_stats.pl -C -w 90 -c 95 -s 5
Disk usage : perl check_linux_stats.pl -D -w 95 -c 100 -u % -p /tmp,/usr,/var
Load average : perl check_linux_stats.pl -L -w 10,8,5 -c 20,18,15
Paging statistics : perl check_linux_stats.pl -W -w 10,1000 -c 20,2000 -s 3
Process statistics : perl check_linux_stats.pl -P -w 100 -c 200
I/O statistics on disk device : perl check_linux_stats.pl -I -w 10 -c 5 -p sda1,sda4,sda5,sda6
Network usage : perl check_linux_stats.pl -N -w 10000 -c 100000000 -p eth0
Processes virtual memory : perl check_linux_stats.pl -T -w 9551820 -c 9551890 -p /var/run/sendmail.pid
Uptime : perl check_linux_stats.pl -U -w 5
HELP
}
sub check_options {
Getopt::Long::Configure("bundling");
GetOptions(
'h' => \$o_help, 'help' => \$o_help,
's:i' => \$o_sleep, 'sleep:i' => \$o_sleep,
'C' => \$o_cpu, 'cpu' => \$o_cpu,
'P' => \$o_procs, 'procs' => \$o_procs,
'T' => \$o_process, 'top' => \$o_process,
'M' => \$o_mem, 'memory' => \$o_mem,
'N' => \$o_net, 'network' => \$o_net,
'D' => \$o_disk, 'disk' => \$o_disk,
'I' => \$o_io, 'io' => \$o_io,
'L' => \$o_load, 'load' => \$o_load,
'F' => \$o_file, 'file' => \$o_file,
'S' => \$o_socket, 'socket' => \$o_socket,
'W' => \$o_paging, 'paging' => \$o_paging,
'U' => \$o_uptime, 'uptime' => \$o_uptime,
'V' => \$o_version, 'version' => \$o_version,
'p:s' => \$o_pattern, 'pattern:s' => \$o_pattern,
'w:s' => \$o_warning, 'warning:s' => \$o_warning,
'c:s' => \$o_critical, 'critical:s' => \$o_critical,
'u:s' => \$o_unit, 'unit:s' => \$o_unit
);
if(defined($o_help)) {
help();
exit $ERRORS{'UNKNOWN'};
}
if(defined($o_version)) {
version();
exit $ERRORS{'UNKNOWN'};
}
}
sub bytes_to_readable {
my ($bignum) = @_;
foreach my $unit ("B","KB","MB","GB") {
return sprintf("%.2f",$bignum)."$unit" if $bignum < 1024;
$bignum /= 1024;
}
}
sub bytes_to_kilobytes {
my ($bignum) = @_;
return sprintf("%.2f", $bignum/1024);
}
sub bytes_to_megabytes {
my ($bignum) = @_;
return sprintf("%.2f", $bignum/1048576);
}
sub bytes_to_gigabytes {
my ($bignum) = @_;
return sprintf("%.2f", $bignum/1073741824);
}