/usr/share/munin/plugins/memcached_ is in munin-plugins-extra 2.0.19-3ubuntu0.3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 | #!/usr/bin/perl
# -*- cperl -*-
#
# Plugin to monitor memcache statistics
#
# This module has 3 seperate graph datasets:
# rates
# bytes
# counters
#
# For each of them, symlink the memcached_ script to memcached_FOO where foo is
# the datset name.
#
# Parameters supported:
#
# config
# autoconf
#
# Configurable variables
#
# host Host of the memcache daemon
# port Port of the memcache daemon
#
# Author: Robin H. Johnson <robbat2@gentoo.org>
# Slightly based on the original version by Joshua Thijssen
# <jthijssen@noxlogic.nl>
#
# Included in trunk for 1.4 by Nicolai Langfeldt. Set family to contrib
# and disabled autoconf due to lack of "suggest".
#
# Magic markers:
#%# family=contrib
#%# capabilities=noautoconf
use strict;
my $ret = undef;
if (! eval "require Cache::Memcached;") {
$ret = "Cache::Memcached not found";
}
my $HOST = exists $ENV{'host'} ? $ENV{'host'} : "127.0.0.1";
my $PORT = exists $ENV{'port'} ? $ENV{'port'} : 11211;
if ( exists $ARGV[0] and $ARGV[0] eq "autoconf" ) {
if ($ret) {
print "no ($ret)\n";
exit 1;
}
# Todo: we can always connect to a memcache server without any errors so I cannot really
# find a way to detect the presence of a memcache instance. Maybe a forced write/read/delete
# but there should be a better way somewhere...
print "yes\n";
exit 0;
}
if($ret) {
print "no ($ret)\n";
exit 1;
}
# We do everything by this array
my %all_vars = (
rates => {
master => {
graph_title => 'Memcached - Commands',
graph_args => '--base 1000',
graph_vlabel => '/${graph_period}',
graph_category => 'memcache',
},
memcache_cache_hits => {
label => 'Cache hits',
type => 'DERIVE',
min => '0',
max => '5000',
draw => 'LINE2',
info => 'Number of cache hits',
stat_group => 'misc',
stat_name => 'get_hits'
},
memcache_cache_misses => {
label => 'Cache misses',
type => 'DERIVE',
min => '0',
max => '5000',
draw => 'LINE2',
info => 'Number of cache misses',
stat_group => 'misc',
stat_name => 'get_misses'
},
memcache_cmd_get => {
label => 'GET requests',
type => 'DERIVE',
min => '0',
max => '5000',
draw => 'LINE2',
info => 'Number of GET commands seen',
stat_group => 'misc',
stat_name => 'cmd_get'
},
memcache_cmd_set => {
label => 'SET requests',
type => 'DERIVE',
min => '0',
max => '5000',
draw => 'LINE2',
info => 'Number of SET commands seen',
stat_group => 'misc',
stat_name => 'cmd_set'
},
memcache_total_items => {
label => 'New items*5',
type => 'DERIVE',
min => '0',
max => '5000',
draw => 'LINE2',
info => 'New items*5',
cdef => 'memcache_total_items,5,*',
stat_group => 'misc',
stat_name => 'total_items'
},
memcache_total_connections => {
label => 'New connections*100',
type => 'DERIVE',
min => '0',
max => '5000',
cdef => 'memcache_total_connections,100,*',
draw => 'LINE2',
info => 'New connections*100',
stat_group => 'misc',
stat_name => 'total_connections'
},
},
bytes => {
master => {
graph_title => 'Memcached - Network traffic',
graph_args => '--base 1000',
graph_vlabel => 'bytes in(-)/out(+) per ${graph_period}',
graph_category => 'memcache',
},
memcache_bytes_read => {
label => 'Bytes read',
type => 'COUNTER',
draw => 'LINE2',
max => '1000000',
info => 'Bytes read from network',
graph => 'no',
stat_group => 'misc',
stat_name => 'bytes_read'
},
memcache_bytes_written => {
label => 'Bytes written',
negative => 'memcache_bytes_read',
type => 'COUNTER',
max => '1000000',
draw => 'LINE2',
info => 'Bytes written to network',
stat_group => 'misc',
stat_name => 'bytes_written'
},
},
counters => {
master => {
graph_title => 'Memcached - Current values',
graph_args => '--base 1000',
#graph_args => '--base 1000 --loga',
graph_vlabel => 'Totals',
graph_category => 'memcache',
graph_scale => 'no',
},
memcache_curr_items => {
label => 'Current items',
type => 'GAUGE',
min => '0',
draw => 'LINE2',
info => 'Number of items in cache',
stat_group => 'misc',
stat_name => 'curr_items'
},
memcache_curr_connections => {
label => 'Current connections*100',
type => 'GAUGE',
min => '0',
draw => 'LINE2',
cdef => 'memcache_curr_connections,100,*',
info => 'Number of connections*100',
stat_group => 'misc',
stat_name => 'curr_connections'
},
memcache_bytes_allocated => {
label => 'Bytes allocated (KiB)',
type => 'GAUGE',
min => '0',
draw => 'LINE2',
cdef => 'memcache_bytes_allocated,1024,/',
info => 'Bytes allocated (KiB)',
stat_group => 'misc',
stat_name => 'bytes'
},
}
);
$0 =~ /memcached_(.+)*$/;
my $func = $1;
exit 2 unless defined $func;
my %vars = %{$all_vars{$func}};
# STAT rusage_user 3941.052868
# STAT rusage_system 18436.366246
# STAT connection_structures 1112
# STAT bytes 382985002
# STAT limit_maxbytes 536870912
if ( exists $ARGV[0] and $ARGV[0] eq "config" ) {
my %v = %{$vars{'master'}};
foreach my $k ( keys %v ) {
print "$k ".$v{$k}."\n"
}
print 'graph_order ';
foreach my $k ( sort(keys %vars) ) {
if($k eq 'master') { next; }
print $k." ";
}
print "\n";
foreach my $k ( sort(keys %vars) ) {
if($k eq 'master') { next; }
my %v = %{$vars{$k}};
foreach my $k2 (keys %v) {
if($k2 eq 'stat_group' or $k2 eq 'stat_name') { next; }
print "$k.$k2 ".$v{"$k2"}."\n";
}
}
exit 0;
}
my $mc = new Cache::Memcached { 'servers' => [ "$HOST:$PORT" ] };
my $stats = $mc->stats ('misc');
foreach my $k ( sort(keys %vars) ) {
if($k eq 'master') { next; }
my %v = %{$vars{$k}};
if($v{type} eq 'COMPUTE') { next; }
my $sg = $v{stat_group};
my $sn = $v{stat_name};
my $value = $stats->{hosts}->{"$HOST:$PORT"}->{$sg}->{$sn};
defined($value) or $value = 'U';
print "$k.value ".$value."\n";
}
# vim:syntax=perl ts=4 sw=4:
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