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check_cpu.php
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check_cpu.php
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<?php
############################################################################
# Copyright 2013 George Hansper #
# This program has been made available to the Open Source community for #
# redistribution and further development under the terms of the #
# GNU General Public License v2: http://www.gnu.org/licenses/gpl-2.0.html #
############################################################################
# This program is supplied 'as-is', in the hope that it will be useful, #
# but the author does not make any warranties or guarantees as #
# to its correct operation. #
# #
# Or in other words: #
# Test it yourself, and make sure it works for YOU. #
############################################################################
# Author: George Hansper e-mail: [email protected] #
############################################################################
# PNP4Nagios Template: check_cpu.php (this file) #
# For Nagios Plugin: check_cpu.py #
# Version: $Id$
############################################################################
# 1st graph: Overall CPU usage with Overall IO Wait
# 2nd graph: CPU usage for each core (up to 8 cores)
# 3rd graph: CPU IO Wait for each core (up to 8 cores)
# subsequent graphs: repeat of 2nd and 3rd for additional CPU cores if present
# Change the value of $max_cpus_per_graph to suit your taste
# Values higher than 16 will re-use colors from the $cpu_colors list
# Version 1.7 $Id$
$max_cpus_per_graph = 8;
if (!function_exists('cpu_color') ) {
function cpu_color($cpu_n,$cpus_per_graph) {
$cpu_colors = [ 'c00000','c08000','c0c000','00a000','00a0a0','0000c0','c000c0','808080',
'e06060','e0a060','e0e060','60e060','60c0c0','6060e0','e060e0','c0c0c0' ];
$cpu_colors6 = [ 'c00000','c0c000','00a000','0000c0','c000c0','808080' ];
$color_ndx = $cpu_n % $cpus_per_graph;
if ( $cpus_per_graph <= 6 ) {
return($cpu_colors6[$color_ndx]);
} else {
return($cpu_colors[$color_ndx]);
}
}
}
##########################################################################################
#error_log("names: ". join(" ",array_keys($NAME) ) );
#error_log("values: ". join(" ",array_values($NAME) ) );
for ( $ndx=1; $ndx <= count($NAME); $ndx++ ) {
#error_log("$ndx: $NAME[$ndx]");
if( preg_match("/[0-9]$/",$NAME[$ndx]) ) {
$ndx_cpus[] = $ndx;
} elseif ( preg_match("/[0-9]_iowait$/",$NAME[$ndx]) ) {
$ndx_iowait[] = $ndx;
} elseif ( preg_match("/[0-9]_steal$/",$NAME[$ndx]) ) {
$ndx_steal[] = $ndx;
} elseif ( $NAME[$ndx] == 'cpu_iowait' ) {
# This is really always 2
$ndx_iowait_total = $ndx;
} elseif ( $NAME[$ndx] == 'cpu_steal' ) {
# This is really always 3
$ndx_steal_total = $ndx;
} elseif ( $NAME[$ndx] == 'cpu' ) {
# This is really always 1
$ndx_total = $ndx;
} elseif( preg_match("/[0-9].all$/",$NAME[$ndx]) ) {
$ndx_cpu_ticks[] = $ndx;
} elseif( preg_match("/[0-9].busy$/",$NAME[$ndx]) ) {
$ndx_busy_ticks[] = $ndx;
} elseif ( preg_match("/[0-9].iowait$/",$NAME[$ndx]) ) {
$ndx_iowait_ticks[] = $ndx;
} elseif ( preg_match("/[0-9].steal$/",$NAME[$ndx]) ) {
$ndx_steal_ticks[] = $ndx;
} elseif ( $NAME[$ndx] == 'cpu.all' ) {
$ndx_total_cpu_ticks = $ndx;
} elseif ( $NAME[$ndx] == 'cpu.busy' ) {
$ndx_total_busy_ticks = $ndx;
} elseif ( $NAME[$ndx] == 'cpu.iowait' ) {
$ndx_total_iowait_ticks = $ndx;
} elseif ( $NAME[$ndx] == 'cpu.steal' ) {
$ndx_total_steal_ticks = $ndx;
} elseif ( $NAME[$ndx] == 'procs' ) {
$ndx_processes = $ndx;
} elseif ( $NAME[$ndx] == 'ctxt' ) {
$ndx_ctxt = $ndx;
}
}
$cpu_list = preg_grep("/[0-9]$/",$NAME);
$def_n=1;
if ( isset($ndx_total) ) {
$def[$def_n]=""; $opt[$def_n]=""; $ds_name[$def_n]="";
$ds_name[$def_n] = "Total CPU (all cores)";
$opt[$def_n] = "--vertical-label \"cpu percent\" -l0 --title \"Total CPU for $hostname / $servicedesc\" ";
# Graph Total CPU usage and IO Wait (average across all cpu cores)
$def[$def_n] .= rrd::def("total_cpu", $RRDFILE[$ndx_total], $DS[$ndx_total], "MAX");
$def[$def_n] .= rrd::def("total_iowait", $RRDFILE[$ndx_iowait_total], $DS[$ndx_iowait_total], "MAX");
$def[$def_n] .= rrd::def("total_steal", $RRDFILE[$ndx_steal_total], $DS[$ndx_steal_total], "MAX");
$def[$def_n] .= rrd::area("total_cpu", "#c0c0ff");
$def[$def_n] .= rrd::area("total_iowait", "#ffa0a0");
$def[$def_n] .= rrd::area("total_steal", "#c0c0a0");
$def[$def_n] .= rrd::line1("total_cpu", "#0000c0",$NAME[$ndx_total]."\t\t");
$def[$def_n] .= rrd::gprint("total_cpu", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
$def[$def_n] .= rrd::line1("total_iowait", "#c00000",$NAME[$ndx_iowait_total]."\t");
$def[$def_n] .= rrd::gprint("total_iowait", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
$def[$def_n] .= rrd::line1("total_steal", "#c0c000",$NAME[$ndx_steal_total]."\t");
$def[$def_n] .= rrd::gprint("total_steal", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
if ($WARN[$ndx_total] != "") {
$def[$def_n] .= "HRULE:".$WARN[$ndx_total]."#FFFF00 ";
}
if ($CRIT[$ndx_total] != "") {
$def[$def_n] .= "HRULE:".$CRIT[$ndx_total]."#FF0000 ";
}
} #if ( isset($ndx_total) )
# Graph Per-Core CPU usage
if ( isset( $ndx_cpus ) ) {
$cpus_per_graph = min($max_cpus_per_graph, count($ndx_cpus));
for( $cpu_n=0; $cpu_n<count($ndx_cpus); $cpu_n++) {
if ( $cpu_n % $max_cpus_per_graph == 0 ) {
# Start a new graph
$def_n++;
$cpu_start = $ndx_cpus[$cpu_n];
if ( $cpu_n + $max_cpus_per_graph >= count($ndx_cpus) ) {
$cpu_end=$ndx_cpus[count($ndx_cpus)-1];
} else {
$cpu_end = $ndx_cpus[$cpu_n + $max_cpus_per_graph - 1];
}
$def[$def_n]='';
$ds_name[$def_n] = "CPU per core";
$opt[$def_n] = "--vertical-label \"cpu percent\" -l0 --title \"Single-core CPU for ".$NAME[$cpu_start]."-".$NAME[$cpu_end]." $hostname / $servicedesc\" ";
if ($WARN[$ndx_cpus[0]] != "") {
$def[$def_n] .= "HRULE:".$WARN[$ndx_cpus[0]]."#FFFF00 ";
}
if ($CRIT[$ndx_cpus[0]] != "") {
$def[$def_n] .= "HRULE:".$CRIT[$ndx_cpus[0]]."#FF0000 ";
}
}
$ndx=$ndx_cpus[$cpu_n];
$name = $NAME[$ndx];
$color = cpu_color($cpu_n,$cpus_per_graph);
$def[$def_n] .= rrd::def("$name", $RRDFILE[$ndx], $DS[$ndx], "MAX");
$def[$def_n] .= rrd::line1("$name", "#$color",$NAME[$ndx]."\t");
$def[$def_n] .= rrd::gprint("$name", array("LAST", "AVERAGE", "MAX"), "%6.2lf ");
}
}
# Graph Per-Core CPU iowait
if ( isset($ndx_iowait) ) {
$cpus_per_graph = min($max_cpus_per_graph, count($ndx_iowait));
for( $cpu_n=0; $cpu_n<count($ndx_iowait); $cpu_n++) {
if ( $cpu_n % $max_cpus_per_graph == 0 ) {
# Start a new graph
$def_n++;
$cpu_start = $ndx_iowait[$cpu_n];
if ( $cpu_n + $max_cpus_per_graph >= count($ndx_iowait) ) {
$cpu_end=$ndx_iowait[count($ndx_iowait)-1];
} else {
$cpu_end = $ndx_iowait[$cpu_n + $max_cpus_per_graph - 1];
}
$def[$def_n]='';
$ds_name[$def_n] = "IO Wait per core";
$opt[$def_n] = "--vertical-label \"io_wait percent\" -l0 --title \"IO Wait per core for ".$NAME[$cpu_start]."-".$NAME[$cpu_end]." $hostname / $servicedesc\" ";
if ($WARN[$ndx_iowait[0]] != "") {
$def[$def_n] .= "HRULE:".$WARN[$ndx_iowait[0]]."#FFFF00 ";
}
if ($CRIT[$ndx_iowait[0]] != "") {
$def[$def_n] .= "HRULE:".$CRIT[$ndx_iowait[0]]."#FF0000 ";
}
}
$ndx=$ndx_iowait[$cpu_n];
$name = $NAME[$ndx];
$color = cpu_color($cpu_n,$cpus_per_graph);
$def[$def_n] .= rrd::def("$name", $RRDFILE[$ndx], $DS[$ndx], "MAX");
$def[$def_n] .= rrd::line1("$name", "#$color",$NAME[$ndx]."\t");
$def[$def_n] .= rrd::gprint("$name", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
}
}
# Graph Per-Core CPU steal
if ( isset($ndx_steal) ) {
$cpus_per_graph = min($max_cpus_per_graph, count($ndx_steal));
for( $cpu_n=0; $cpu_n<count($ndx_steal); $cpu_n++) {
if ( $cpu_n % $max_cpus_per_graph == 0 ) {
# Start a new graph
$def_n++;
$cpu_start = $ndx_steal[$cpu_n];
if ( $cpu_n + $max_cpus_per_graph >= count($ndx_steal) ) {
$cpu_end=$ndx_steal[count($ndx_steal)-1];
} else {
$cpu_end = $ndx_steal[$cpu_n + $max_cpus_per_graph - 1];
}
$def[$def_n]='';
$ds_name[$def_n] = "Steal per core";
$opt[$def_n] = "--vertical-label \"steal percent\" -l0 --title \"Steal per core for ".$NAME[$cpu_start]."-".$NAME[$cpu_end]." $hostname / $servicedesc\" ";
if ($WARN[$ndx_steal[0]] != "") {
$def[$def_n] .= "HRULE:".$WARN[$ndx_steal[0]]."#FFFF00 ";
}
if ($CRIT[$ndx_steal[0]] != "") {
$def[$def_n] .= "HRULE:".$CRIT[$ndx_steal[0]]."#FF0000 ";
}
}
$ndx=$ndx_steal[$cpu_n];
$name = $NAME[$ndx];
$color = cpu_color($cpu_n,$cpus_per_graph);
$def[$def_n] .= rrd::def("$name", $RRDFILE[$ndx], $DS[$ndx], "MAX");
$def[$def_n] .= rrd::line1("$name", "#$color",$NAME[$ndx]."\t");
$def[$def_n] .= rrd::gprint("$name", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
}
}
##################################################################
# Graph *_ticks counters
##################################################################
# Graph Total CPU usage and IO Wait (average across all cpu cores)
if ( isset($ndx_total_cpu_ticks) ) {
$def_n++;
$def[$def_n]=""; $opt[$def_n]=""; $ds_name[$def_n]="";
$ds_name[$def_n] = "CPU usage in ticks/second (all cores)";
$opt[$def_n] = "--vertical-label \"cpu ticks/s\" -l0 --title \"CPU usage in ticks for $hostname / $servicedesc\" ";
$def[$def_n] .= rrd::def("total_cpu_ticks", $RRDFILE[$ndx_total_cpu_ticks], $DS[$ndx_total_cpu_ticks], "MAX");
$def[$def_n] .= rrd::def("total_busy_ticks", $RRDFILE[$ndx_total_busy_ticks], $DS[$ndx_total_busy_ticks], "MAX");
$def[$def_n] .= rrd::def("total_iowait_ticks", $RRDFILE[$ndx_total_iowait_ticks], $DS[$ndx_total_iowait_ticks], "MAX");
$def[$def_n] .= rrd::def("total_steal_ticks", $RRDFILE[$ndx_total_steal_ticks], $DS[$ndx_total_steal_ticks], "MAX");
$def[$def_n] .= rrd::area("total_cpu_ticks", "#f0f0f0");
$def[$def_n] .= rrd::area("total_busy_ticks", "#c0c0ff");
$def[$def_n] .= rrd::area("total_iowait_ticks", "#ffa0a0");
$def[$def_n] .= rrd::area("total_steal_ticks", "#c0c0a0");
$def[$def_n] .= rrd::line1("total_cpu_ticks", "#000000",$NAME[$ndx_total_cpu_ticks]."\t\t");
$def[$def_n] .= rrd::gprint("total_cpu_ticks", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
$def[$def_n] .= rrd::line1("total_busy_ticks", "#0000c0",$NAME[$ndx_total_busy_ticks]."\t\t");
$def[$def_n] .= rrd::gprint("total_busy_ticks", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
$def[$def_n] .= rrd::line1("total_iowait_ticks", "#c00000",$NAME[$ndx_total_iowait_ticks]."\t");
$def[$def_n] .= rrd::gprint("total_iowait_ticks", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
$def[$def_n] .= rrd::line1("total_steal_ticks", "#c0c000",$NAME[$ndx_total_steal_ticks]."\t");
$def[$def_n] .= rrd::gprint("total_steal_ticks", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
}
# Graph Per-Core CPU total ticks - based on cpu ticks (aka jiffies)
if ( isset($ndx_cpu_ticks) ) {
$cpus_per_graph = min($max_cpus_per_graph, count($ndx_cpu_ticks));
for( $cpu_n=0; $cpu_n<count($ndx_cpu_ticks); $cpu_n++) {
if ( $cpu_n % $max_cpus_per_graph == 0 ) {
# Start a new graph
$def_n++;
$cpu_start = $ndx_cpu_ticks[$cpu_n];
if ( $cpu_n + $max_cpus_per_graph >= count($ndx_cpu_ticks) ) {
$cpu_end=$ndx_cpu_ticks[count($ndx_cpu_ticks)-1];
} else {
$cpu_end = $ndx_cpu_ticks[$cpu_n + $max_cpus_per_graph - 1];
}
$def[$def_n]='';
$ds_name[$def_n] = "CPU total ticks, per core";
$opt[$def_n] = "--vertical-label \"cpu ticks\" -l0 --title \"CPU total ticks for cores ".$NAME[$cpu_start]."-".$NAME[$cpu_end]." $hostname / $servicedesc\" ";
if ($WARN[$ndx_cpu_ticks[0]] != "") {
$def[$def_n] .= "HRULE:".$WARN[$ndx_cpu_ticks[0]]."#FFFF00 ";
}
if ($CRIT[$ndx_cpu_ticks[0]] != "") {
$def[$def_n] .= "HRULE:".$CRIT[$ndx_cpu_ticks[0]]."#FF0000 ";
}
}
$ndx=$ndx_cpu_ticks[$cpu_n];
$name = str_replace('.','__',$NAME[$ndx]);
$color = cpu_color($cpu_n,$cpus_per_graph);
$def[$def_n] .= rrd::def("$name", $RRDFILE[$ndx], $DS[$ndx], "MAX");
$def[$def_n] .= rrd::line1("$name", "#$color",$NAME[$ndx]."\t");
$def[$def_n] .= rrd::gprint("$name", array("LAST", "AVERAGE", "MAX"), "%6.2lf ");
}
}
# Graph Per-Core CPU usage - based on cpu ticks (aka jiffies)
if ( isset($ndx_busy_ticks) ) {
$cpus_per_graph = min($max_cpus_per_graph, count($ndx_busy_ticks));
for( $cpu_n=0; $cpu_n<count($ndx_busy_ticks); $cpu_n++) {
if ( $cpu_n % $max_cpus_per_graph == 0 ) {
# Start a new graph
$def_n++;
$cpu_start = $ndx_busy_ticks[$cpu_n];
if ( $cpu_n + $max_cpus_per_graph >= count($ndx_busy_ticks) ) {
$cpu_end=$ndx_busy_ticks[count($ndx_busy_ticks)-1];
} else {
$cpu_end = $ndx_busy_ticks[$cpu_n + $max_cpus_per_graph - 1];
}
$def[$def_n]='';
$ds_name[$def_n] = "CPU busy ticks, per core";
$opt[$def_n] = "--vertical-label \"cpu ticks\" -l0 --title \"CPU busy ticks for cores ".$NAME[$cpu_start]."-".$NAME[$cpu_end]." $hostname / $servicedesc\" ";
if ($WARN[$ndx_busy_ticks[0]] != "") {
$def[$def_n] .= "HRULE:".$WARN[$ndx_busy_ticks[0]]."#FFFF00 ";
}
if ($CRIT[$ndx_busy_ticks[0]] != "") {
$def[$def_n] .= "HRULE:".$CRIT[$ndx_busy_ticks[0]]."#FF0000 ";
}
}
$ndx=$ndx_busy_ticks[$cpu_n];
$name = str_replace('.','__',$NAME[$ndx]);
$color = cpu_color($cpu_n,$cpus_per_graph);
$def[$def_n] .= rrd::def("$name", $RRDFILE[$ndx], $DS[$ndx], "MAX");
$def[$def_n] .= rrd::line1("$name", "#$color",$NAME[$ndx]."\t");
$def[$def_n] .= rrd::gprint("$name", array("LAST", "AVERAGE", "MAX"), "%6.2lf ");
}
}
# Graph Per-Core CPU iowait
if ( isset($ndx_iowait_ticks) ) {
$cpus_per_graph = min($max_cpus_per_graph, count($ndx_iowait_ticks));
for( $cpu_n=0; $cpu_n<count($ndx_iowait_ticks); $cpu_n++) {
if ( $cpu_n % $max_cpus_per_graph == 0 ) {
# Start a new graph
$def_n++;
$cpu_start = $ndx_iowait_ticks[$cpu_n];
if ( $cpu_n + $max_cpus_per_graph >= count($ndx_iowait_ticks) ) {
$cpu_end=$ndx_iowait_ticks[count($ndx_iowait_ticks)-1];
} else {
$cpu_end = $ndx_iowait_ticks[$cpu_n + $max_cpus_per_graph - 1];
}
$def[$def_n]='';
$ds_name[$def_n] = "IO Wait per core";
$opt[$def_n] = "--vertical-label \"io_wait percent\" -l0 --title \"IO Wait per core for ".$NAME[$cpu_start]."-".$NAME[$cpu_end]." $hostname / $servicedesc\" ";
if ($WARN[$ndx_iowait_ticks[0]] != "") {
$def[$def_n] .= "HRULE:".$WARN[$ndx_iowait_ticks[0]]."#FFFF00 ";
}
if ($CRIT[$ndx_iowait_ticks[0]] != "") {
$def[$def_n] .= "HRULE:".$CRIT[$ndx_iowait_ticks[0]]."#FF0000 ";
}
}
$ndx=$ndx_iowait_ticks[$cpu_n];
$name = str_replace('.','__',$NAME[$ndx]);
$color = cpu_color($cpu_n,$cpus_per_graph);
$def[$def_n] .= rrd::def("$name", $RRDFILE[$ndx], $DS[$ndx], "MAX");
$def[$def_n] .= rrd::line1("$name", "#$color",$NAME[$ndx]."\t");
$def[$def_n] .= rrd::gprint("$name", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
}
}
# Graph Per-Core CPU steal
if ( isset($ndx_steal_ticks) ) {
$cpus_per_graph = min($max_cpus_per_graph, count($ndx_steal_ticks));
for( $cpu_n=0; $cpu_n<count($ndx_steal_ticks); $cpu_n++) {
if ( $cpu_n % $max_cpus_per_graph == 0 ) {
# Start a new graph
$def_n++;
$cpu_start = $ndx_steal_ticks[$cpu_n];
if ( $cpu_n + $max_cpus_per_graph >= count($ndx_steal_ticks) ) {
$cpu_end=$ndx_steal_ticks[count($ndx_steal_ticks)-1];
} else {
$cpu_end = $ndx_steal_ticks[$cpu_n + $max_cpus_per_graph - 1];
}
$def[$def_n]='';
$ds_name[$def_n] = "Steal per core";
$opt[$def_n] = "--vertical-label \"steal percent\" -l0 --title \"Steal per core for ".$NAME[$cpu_start]."-".$NAME[$cpu_end]." $hostname / $servicedesc\" ";
if ($WARN[$ndx_steal_ticks[0]] != "") {
$def[$def_n] .= "HRULE:".$WARN[$ndx_steal_ticks[0]]."#FFFF00 ";
}
if ($CRIT[$ndx_steal_ticks[0]] != "") {
$def[$def_n] .= "HRULE:".$CRIT[$ndx_steal_ticks[0]]."#FF0000 ";
}
}
$ndx=$ndx_steal_ticks[$cpu_n];
$name = str_replace('.','__',$NAME[$ndx]);
$color = cpu_color($cpu_n,$cpus_per_graph);
$def[$def_n] .= rrd::def("$name", $RRDFILE[$ndx], $DS[$ndx], "MAX");
$def[$def_n] .= rrd::line1("$name", "#$color",$NAME[$ndx]."\t");
$def[$def_n] .= rrd::gprint("$name", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
}
}
##################################################################
# Graph ctxt (context switches/second)
if ( isset($ndx_ctxt) ) {
$def_n++;
$def[$def_n]=""; $opt[$def_n]=""; $ds_name[$def_n]="";
$ds_name[$def_n] = "Context switches per second (all cores)";
$opt[$def_n] = "--vertical-label \"context switches\" -l0 --title \"Context switches per second for $hostname / $servicedesc\" ";
# Graph Context switches per second (total across all cpu cores)
$def[$def_n] .= rrd::def("ctxt", $RRDFILE[$ndx_ctxt], $DS[$ndx_ctxt], "MAX");
$def[$def_n] .= rrd::area("ctxt", "#c0c0ff");
$def[$def_n] .= rrd::line1("ctxt", "#0000c0",$NAME[$ndx_ctxt]."\t\t");
$def[$def_n] .= rrd::gprint("ctxt", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
}
##################################################################
# Graph processes (new processes/second)
if ( isset($ndx_processes) ) {
$def_n++;
$def[$def_n]=""; $opt[$def_n]=""; $ds_name[$def_n]="";
$ds_name[$def_n] = "New processes per second (all cores)";
$opt[$def_n] = "--vertical-label \"processes/s\" -l0 --title \"New processes per second for $hostname / $servicedesc\" ";
# Graph Context switches per second (total across all cpu cores)
$def[$def_n] .= rrd::def("processes", $RRDFILE[$ndx_processes], $DS[$ndx_processes], "MAX");
$def[$def_n] .= rrd::area("processes", "#a0ffa0");
$def[$def_n] .= rrd::line1("processes", "#00a000",$NAME[$ndx_processes]."\t\t");
$def[$def_n] .= rrd::gprint("processes", array("LAST", "AVERAGE", "MAX"), "%6.2lf");
}
#error_log($def[1]);
#error_log($def[2]);
#error_log($def[3]);
?>