| 1 |
#!/usr/bin/perl -w |
| 2 |
|
| 3 |
# |
| 4 |
# i-scream central monitoring system |
| 5 |
# http://www.i-scream.org.uk |
| 6 |
# Copyright (C) 2000-2002 i-scream |
| 7 |
# |
| 8 |
# This program is free software; you can redistribute it and/or |
| 9 |
# modify it under the terms of the GNU General Public License |
| 10 |
# as published by the Free Software Foundation; either version 2 |
| 11 |
# of the License, or (at your option) any later version. |
| 12 |
# |
| 13 |
# This program is distributed in the hope that it will be useful, |
| 14 |
# but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 |
# GNU General Public License for more details. |
| 17 |
# |
| 18 |
# You should have received a copy of the GNU General Public License |
| 19 |
# along with this program; if not, write to the Free Software |
| 20 |
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 21 |
# |
| 22 |
|
| 23 |
# ----------------------------------------------------------- |
| 24 |
# i-scream graph generation script |
| 25 |
# http://www.i-scream.org.uk |
| 26 |
# |
| 27 |
# Generates graphs from rrd databases for i-scream data. |
| 28 |
# |
| 29 |
# $Author: tdb $ |
| 30 |
# $Id: graph.pl,v 1.11 2002/10/21 13:02:58 tdb Exp $ |
| 31 |
#------------------------------------------------------------ |
| 32 |
|
| 33 |
## TODO |
| 34 |
# possibly make more configurable? |
| 35 |
# -- allow configurable periods of graphs |
| 36 |
# -- comments, types, etc |
| 37 |
|
| 38 |
my($version) = '$Id: graph.pl,v 1.11 2002/10/21 13:02:58 tdb Exp $'; |
| 39 |
|
| 40 |
$| = 1; |
| 41 |
|
| 42 |
use strict; |
| 43 |
use Getopt::Std; |
| 44 |
use RRDs; |
| 45 |
|
| 46 |
# define variables that will be read from the config |
| 47 |
# nb. keep this insync with the config file! |
| 48 |
use vars qw{ |
| 49 |
$imgdir $rrddir |
| 50 |
$maxrrdage $maximgage $deleterrds $deleteimgs |
| 51 |
$hex_slash $hex_underscore |
| 52 |
$rrdstep $retry_wait |
| 53 |
$verbose $quiet |
| 54 |
}; |
| 55 |
|
| 56 |
# default locate of the config file |
| 57 |
my($configfile) = "rrdgraphing.conf"; |
| 58 |
|
| 59 |
# check for command line arguments |
| 60 |
my(%opts); |
| 61 |
my($ret) = getopts('hvqVc:', \%opts); |
| 62 |
|
| 63 |
# if invalid argument given, $ret will not be 1 |
| 64 |
&usage() if $ret != 1; |
| 65 |
|
| 66 |
# first process the arguments which might mean we exit now |
| 67 |
|
| 68 |
# -h is usage |
| 69 |
if($opts{h}) { |
| 70 |
&usage(); |
| 71 |
} |
| 72 |
# -V is version |
| 73 |
if($opts{V}) { |
| 74 |
print "graph.pl version: $version\n"; |
| 75 |
exit(1); |
| 76 |
} |
| 77 |
|
| 78 |
# Then try getting the config |
| 79 |
|
| 80 |
# -c specifies the config file location |
| 81 |
if($opts{c}) { |
| 82 |
$configfile = $opts{c}; |
| 83 |
} |
| 84 |
# suck in the config |
| 85 |
&log("reading config from $configfile\n"); |
| 86 |
do $configfile; |
| 87 |
|
| 88 |
# Then any options we might want to override the config with |
| 89 |
|
| 90 |
# -v is verbose |
| 91 |
if($opts{v}) { |
| 92 |
$verbose = $opts{v}; |
| 93 |
} |
| 94 |
# -q is verbose |
| 95 |
if($opts{q}) { |
| 96 |
$quiet = $opts{q}; |
| 97 |
# if we're meant to be quiet, we can hardly be verbose! |
| 98 |
$verbose = 0; |
| 99 |
} |
| 100 |
|
| 101 |
# Read the contents of the base directory |
| 102 |
# and pull out the list of subdirectories (except . and .. :) |
| 103 |
opendir(DIR, $rrddir); |
| 104 |
my(@rrddirlist) = grep { -d "$rrddir/$_" && !/^\.$/ && !/^\.\.$/ } readdir(DIR); |
| 105 |
closedir DIR; |
| 106 |
|
| 107 |
# look through each directoty, as they might |
| 108 |
# contain rrds for a particular machine |
| 109 |
foreach my $machine (@rrddirlist) { |
| 110 |
# Read the contents of the directory |
| 111 |
opendir(DIR, "$rrddir/$machine"); |
| 112 |
my(@rrdlist) = grep { /\.rrd$/ && -f "$rrddir/$machine/$_" } readdir(DIR); |
| 113 |
closedir DIR; |
| 114 |
|
| 115 |
# See what rrd we have, and generate the graphs accordingly |
| 116 |
foreach my $rrd (@rrdlist) { |
| 117 |
chomp $rrd; |
| 118 |
# stat the file |
| 119 |
my($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime, |
| 120 |
$ctime,$blksize,$blocks) = stat("$rrddir/$machine/$rrd"); |
| 121 |
# check if it's old enough to be deleted |
| 122 |
if((time - $mtime) > $maxrrdage) { |
| 123 |
# do we delete the rrd, or just ignore it? |
| 124 |
if($deleterrds) { |
| 125 |
# if so, delete it |
| 126 |
unlink("$rrddir/$machine/$rrd"); |
| 127 |
&log("deleted old rrd $rrddir/$machine/$rrd\n"); |
| 128 |
} |
| 129 |
else { |
| 130 |
&log("ignored old rrd $rrddir/$machine/$rrd\n"); |
| 131 |
} |
| 132 |
# no more processing required for this rrd |
| 133 |
next; |
| 134 |
} |
| 135 |
if($rrd =~ /^(cpu)\.rrd$/) { |
| 136 |
my(@data); |
| 137 |
my(@rawdata); |
| 138 |
push @data, "LINE2:$1:idle:idle#00FF00:OK:idle cpu "; |
| 139 |
push @data, "LINE2:$1:user:user#0000FF:OK:user cpu "; |
| 140 |
push @data, "LINE2:$1:kernel:kernel#00FFFF:OK:kernel cpu"; |
| 141 |
push @data, "LINE2:$1:swap:swap#FF00FF:OK:swap cpu "; |
| 142 |
push @data, "LINE2:$1:iowait:iowait#FF0000:OK:iowait cpu"; |
| 143 |
push @rawdata, "--upper-limit=100"; |
| 144 |
&makegraph($machine, $1, "CPU Usage for $machine", "% cpu time", \@data, \@rawdata); |
| 145 |
} |
| 146 |
if($rrd =~ /^(mem)\.rrd$/) { |
| 147 |
my(@data); |
| 148 |
my(@rawdata); |
| 149 |
# we don't actually want to display free or total memory, |
| 150 |
# although we need it to work out peruse... |
| 151 |
push @data, "NONE:$1:free:free#CCCCFF:NONE:free memory"; |
| 152 |
push @data, "NONE:$1:total:total#0000FF:NONE:total memory\\n"; |
| 153 |
# calculate peruse - note that we only use 'free' if it's less than total |
| 154 |
# (this is to avoid negative percentages :) |
| 155 |
push @rawdata, "CDEF:peruse=total,free,total,LT,free,0,IF,-,total,/,100,*"; |
| 156 |
# and add it to the graph |
| 157 |
push @rawdata, "AREA:peruse#CCCCFF:% memory in use"; |
| 158 |
push @rawdata, "--upper-limit=100"; |
| 159 |
push @rawdata, "--base=1024"; |
| 160 |
# add some nice values to the legend |
| 161 |
&addlegend(\@rawdata, "peruse"); |
| 162 |
# put the total memory on the graph so we can map percentages to real values |
| 163 |
push @rawdata, "GPRINT:total:LAST:Current total memory\\: \%.2lf %sb\\c"; |
| 164 |
&makegraph($machine, $1, "Memory Usage for $machine", "% memory in use", \@data, \@rawdata); |
| 165 |
} |
| 166 |
if($rrd =~ /^(load)\.rrd$/) { |
| 167 |
my(@data); |
| 168 |
push @data, "LINE2:$1:load1:load1#CCCCFF:OK: 1 min load average"; |
| 169 |
push @data, "LINE2:$1:load5:load5#7777FF:OK: 5 min load average"; |
| 170 |
push @data, "LINE2:$1:load15:load15#0000FF:OK:15 min load average"; |
| 171 |
&makegraph($machine, $1, "Loads for $machine", "load average", \@data); |
| 172 |
} |
| 173 |
if($rrd =~ /^(proc)\.rrd$/) { |
| 174 |
my(@data); |
| 175 |
push @data, "LINE2:$1:cpu:cpu#00FF00:OK:cpu processes "; |
| 176 |
push @data, "LINE2:$1:sleeping:sleeping#0000FF:OK:sleeping processes"; |
| 177 |
push @data, "LINE2:$1:stopped:stopped#00FFFF:OK:stopped processes "; |
| 178 |
push @data, "LINE2:$1:total:total#FF00FF:OK:total processes "; |
| 179 |
push @data, "LINE2:$1:zombie:zombie#FF0000:OK:zombie processes "; |
| 180 |
&makegraph($machine, $1, "Processes on $machine", "no. of processes", \@data); |
| 181 |
} |
| 182 |
if($rrd =~ /^(swap)\.rrd$/) { |
| 183 |
my(@data); |
| 184 |
my(@rawdata); |
| 185 |
# we don't actually want to display free or total swap, |
| 186 |
# although we need it to work out peruse... |
| 187 |
push @data, "NONE:$1:free:free#CCCCFF:NONE:free swap"; |
| 188 |
push @data, "NONE:$1:total:total#0000FF:NONE:total swap\\n"; |
| 189 |
# calculate peruse - note that we only use 'free' if it's less than total |
| 190 |
# (this is to avoid negative percentages :) |
| 191 |
push @rawdata, "CDEF:peruse=total,free,total,LT,free,0,IF,-,total,/,100,*"; |
| 192 |
# and add it to the graph |
| 193 |
push @rawdata, "AREA:peruse#CCCCFF:% swap in use"; |
| 194 |
push @rawdata, "--upper-limit=100"; |
| 195 |
push @rawdata, "--base=1024"; |
| 196 |
# add some nice values to the legend |
| 197 |
&addlegend(\@rawdata, "peruse"); |
| 198 |
# put the total swap on the graph so we can map percentages to real values |
| 199 |
push @rawdata, "GPRINT:total:LAST:Current total swap\\: \%.2lf %sb\\c"; |
| 200 |
&makegraph($machine, $1, "Swap Usage for $machine", "% swap in use", \@data, \@rawdata); |
| 201 |
} |
| 202 |
if($rrd =~ /^(users)\.rrd$/) { |
| 203 |
my(@data); |
| 204 |
push @data, "AREA:$1:count:count#CCCCFF:OK:user count"; |
| 205 |
&makegraph($machine, $1, "User Count for $machine", "no. of users", \@data); |
| 206 |
} |
| 207 |
if($rrd =~ /^(paging)\.rrd$/) { |
| 208 |
my(@data); |
| 209 |
push @data, "LINE2:$1:pageins:pageins#00FF00:OK:pages paged in "; |
| 210 |
push @data, "LINE2:$1:pageouts:pageouts#0000FF:OK:pages paged out"; |
| 211 |
&makegraph($machine, $1, "Paging on $machine", "pages per second", \@data); |
| 212 |
} |
| 213 |
if($rrd =~ /^(disk)-(\S+)\.rrd$/) { |
| 214 |
my(@data); |
| 215 |
my(@rawdata); |
| 216 |
# we need this lot for our calculations, but we'll never show them |
| 217 |
push @data, "NONE:$1-$2:total:total#0000FF:NONE:total size\\n"; |
| 218 |
push @data, "NONE:$1-$2:used:used#CCCCFF:NONE:used space"; |
| 219 |
push @data, "NONE:$1-$2:totalinodes:totalinodes#000000:NONE:total inodes"; |
| 220 |
push @data, "NONE:$1-$2:freeinodes:freeinodes#000000:NONE:free inodes"; |
| 221 |
# calculate peruse, add it to the graph, and add a legend |
| 222 |
push @rawdata, "CDEF:peruse=used,total,/,100,*"; |
| 223 |
push @rawdata, "AREA:peruse#CCCCFF:% disk used "; |
| 224 |
&addlegend(\@rawdata, "peruse"); |
| 225 |
# put the total space on the graph so we can map percentages to real values |
| 226 |
push @rawdata, "GPRINT:total:LAST:Current total space\\: \%.2lf %sb\\c"; |
| 227 |
# calculate perinodeuse, add it to the graph, and add a legend |
| 228 |
push @rawdata, "CDEF:perinodeuse=totalinodes,freeinodes,totalinodes,LT,freeinodes,0,IF,-,totalinodes,/,100,*"; |
| 229 |
push @rawdata, "LINE2:perinodeuse#FF4444:% inodes used"; |
| 230 |
push @rawdata, "--upper-limit=100"; |
| 231 |
push @rawdata, "--base=1024"; |
| 232 |
&addlegend(\@rawdata, "perinodeuse"); |
| 233 |
# put the total inodes on the graph so we can map percentages to real values |
| 234 |
push @rawdata, "GPRINT:totalinodes:LAST:Current total inodes\\: \%.2lf %s\\c"; |
| 235 |
# some name tidting |
| 236 |
my($type) = $1; |
| 237 |
my($name) = $2; |
| 238 |
my($nicename) = $2; |
| 239 |
$nicename =~ s/$hex_slash/\//g; |
| 240 |
$nicename =~ s/$hex_underscore/_/g; |
| 241 |
&makegraph($machine, "$type-$name", "Disk Usage for $machine on $nicename", "% usage", \@data, \@rawdata); |
| 242 |
} |
| 243 |
if($rrd =~ /^(diskio)-(\S+)\.rrd$/) { |
| 244 |
my(@data); |
| 245 |
my(@rawdata); |
| 246 |
push @data, "LINE2:$1-$2:rbytes:rbytes#00FF00:OK:read bytes "; |
| 247 |
push @data, "LINE2:$1-$2:wbytes:wbytes#0000FF:OK:write bytes"; |
| 248 |
push @rawdata, "--base=1024"; |
| 249 |
&makegraph($machine, "$1-$2", "Disk IO for $machine on $2", "bytes per second", \@data, \@rawdata); |
| 250 |
} |
| 251 |
if($rrd =~ /^(net)-(\S+)\.rrd$/) { |
| 252 |
my(@data); |
| 253 |
my(@rawdata); |
| 254 |
push @data, "LINE2:$1-$2:rx:rx#00FF00:OK:received bytes "; |
| 255 |
push @data, "LINE2:$1-$2:tx:tx#0000FF:OK:transfered bytes"; |
| 256 |
push @rawdata, "--base=1024"; |
| 257 |
&makegraph($machine, "$1-$2", "Network IO for $machine on $2", "bytes per second", \@data, \@rawdata); |
| 258 |
} |
| 259 |
# probably a queue with a name like this :) |
| 260 |
if($rrd =~ /^(\d+)_0\.rrd$/) { |
| 261 |
my(@data); |
| 262 |
my(@rawdata); |
| 263 |
my($baserrd) = $1; |
| 264 |
my($i) = 0; |
| 265 |
while( -f "$rrddir/$machine/$baserrd\_$i.rrd" ) { |
| 266 |
push @data, "LINE2:$baserrd\_$i:size:size$i" . &get_colour($i) . ":OK:queue$i size "; |
| 267 |
++$i; |
| 268 |
} |
| 269 |
push @data, "LINE2:$baserrd\_0:total:total#FF0000:OK:packets/sec "; |
| 270 |
my($comment); |
| 271 |
if(-f "$rrddir/$machine/$baserrd.def") { |
| 272 |
open(DEF, "$rrddir/$machine/$baserrd.def"); |
| 273 |
$comment = <DEF>; |
| 274 |
chomp $comment if defined $comment; |
| 275 |
} |
| 276 |
$comment = "unknown queue" if not defined $comment; |
| 277 |
&makegraph($machine, $baserrd, $comment, "", \@data, \@rawdata); |
| 278 |
} |
| 279 |
} |
| 280 |
# have a last check, maybe we can remove the directory now? |
| 281 |
# (only if we're deleting stuff) |
| 282 |
if($deleterrds) { |
| 283 |
# Read the contents of the directory |
| 284 |
opendir(DIR, "$rrddir/$machine"); |
| 285 |
my(@dirlist) = grep { !/^\.$/ && !/^\.\.$/ } readdir(DIR); |
| 286 |
closedir DIR; |
| 287 |
if($#dirlist == -1) { |
| 288 |
rmdir "$rrddir/$machine"; |
| 289 |
&log("deleting empty rrd directory $rrddir/$machine\n"); |
| 290 |
} |
| 291 |
} |
| 292 |
} |
| 293 |
|
| 294 |
if($deleteimgs) { |
| 295 |
# Read the contents of the graphs directory |
| 296 |
# and pull out the list of subdirectories (except . and .. :) |
| 297 |
opendir(DIR, $imgdir); |
| 298 |
my(@imgdirlist) = grep { -d "$imgdir/$_" && !/^\.$/ && !/^\.\.$/ } readdir(DIR); |
| 299 |
closedir DIR; |
| 300 |
|
| 301 |
# look through each directoty, as they might |
| 302 |
# contain images for a particular machine |
| 303 |
foreach my $machine (@imgdirlist) { |
| 304 |
# Read the contents of the directory |
| 305 |
opendir(DIR, "$imgdir/$machine"); |
| 306 |
my(@imglist) = grep { /\.png$/ && -f "$imgdir/$machine/$_" } readdir(DIR); |
| 307 |
closedir DIR; |
| 308 |
|
| 309 |
# See what rrd we have, and generate the graphs accordingly |
| 310 |
foreach my $img (@imglist) { |
| 311 |
chomp $img; |
| 312 |
# stat the img |
| 313 |
my($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime, |
| 314 |
$ctime,$blksize,$blocks) = stat("$imgdir/$machine/$img"); |
| 315 |
# check if it's old enough to be deleted |
| 316 |
if((time - $mtime) > $maximgage) { |
| 317 |
# if so, delete it |
| 318 |
unlink("$imgdir/$machine/$img"); |
| 319 |
&log("deleted old image $imgdir/$machine/$img\n"); |
| 320 |
} |
| 321 |
} |
| 322 |
# have a last check, maybe we can remove the directory now? |
| 323 |
# Read the contents of the directory |
| 324 |
opendir(DIR, "$imgdir/$machine"); |
| 325 |
my(@dirlist) = grep { !/^\.$/ && !/^\.\.$/ } readdir(DIR); |
| 326 |
closedir DIR; |
| 327 |
if($#dirlist == -1) { |
| 328 |
rmdir "$imgdir/$machine"; |
| 329 |
&log("deleted empty image directory $imgdir/$machine\n"); |
| 330 |
} |
| 331 |
} |
| 332 |
} |
| 333 |
|
| 334 |
exit(0); |
| 335 |
|
| 336 |
|
| 337 |
# |
| 338 |
# subroutine to make some graphs |
| 339 |
# |
| 340 |
# $machine = name of the machine |
| 341 |
# (eg. kernow.ukc.ac.uk) |
| 342 |
# $type = the type of graph for the machine |
| 343 |
# (eg. cpu) |
| 344 |
# $title = the title for the graph |
| 345 |
# (eg. kernow CPU usage) |
| 346 |
# $vlabel = the vertical label to apply to the left side of the graph |
| 347 |
# (eg. kb/s) |
| 348 |
# $dataref = a reference to an array containing information for the graph |
| 349 |
# elements of format: "gtype:rrdname:dsname:name#colour:legend:comment with spaces" |
| 350 |
# (if gtype is "NONE" only a DEF of 'name' will be defined, no line will be plotted) |
| 351 |
# (if legend is "NONE" the latest/average/max/min legend won't be printed) |
| 352 |
# $rawcmdref = a reference to an array containing raw rrd commands |
| 353 |
# elements a single command each, no spaces |
| 354 |
# |
| 355 |
|
| 356 |
sub makegraph() { |
| 357 |
my($machine, $type, $title, $vlabel, $dataref, $rawcmdref) = @_; |
| 358 |
# pass in these arrays by reference |
| 359 |
my(@data) = @$dataref if defined $dataref; |
| 360 |
my(@rawcmd) = @$rawcmdref if defined $rawcmdref; |
| 361 |
# check if directory exists for images |
| 362 |
if(! -d "$imgdir/$machine") { |
| 363 |
# not sure on this umask, but it seems to work? |
| 364 |
mkdir "$imgdir/$machine", 0777; |
| 365 |
&log("created directory $imgdir/$machine\n"); |
| 366 |
} |
| 367 |
my(@rrdcmd); |
| 368 |
foreach my $dataitem (@data) { |
| 369 |
# dataitem should be: "gtype:rrdname:dsname:name#colour:legend:comment with spaces" |
| 370 |
# (if gtype is "NONE" only a DEF of 'name' will be defined, no line will be plotted) |
| 371 |
# (if legend is "NONE" the latest/average/max/min legend won't be printed) |
| 372 |
if($dataitem =~ /^(\S+):(\S+):(\S+):(\S+)#(.{6}):(\S+):(.*)$/) { |
| 373 |
push @rrdcmd, "DEF:$4=$rrddir/$machine/$2.rrd:$3:AVERAGE"; |
| 374 |
if($1 ne "NONE") { |
| 375 |
push @rrdcmd, "$1:$4#$5:$7"; |
| 376 |
if($6 ne "NONE") { |
| 377 |
# add some nice values to the legend |
| 378 |
&addlegend(\@rrdcmd, $4); |
| 379 |
} |
| 380 |
} |
| 381 |
} |
| 382 |
} |
| 383 |
push @rrdcmd, "--title=$title"; |
| 384 |
push @rrdcmd, "--imgformat=PNG"; |
| 385 |
push @rrdcmd, "--lower-limit=0"; |
| 386 |
push @rrdcmd, "--vertical-label=$vlabel"; |
| 387 |
# not entirely convinced this is good... |
| 388 |
push @rrdcmd, "--alt-autoscale-max"; |
| 389 |
# add any further raw commands |
| 390 |
push @rrdcmd, @rawcmd; |
| 391 |
RRDs::graph ("$imgdir/$machine/$type-3h.png", "--start=-10800", @rrdcmd); |
| 392 |
my($err_3h) = RRDs::error; |
| 393 |
&log("created $imgdir/$machine/$type-3h.png\n") unless $err_3h; |
| 394 |
&error("Error generating 3h graph for $machine/$type: $err_3h\n") if $err_3h; |
| 395 |
RRDs::graph ("$imgdir/$machine/$type-1d.png", "--start=-86400", @rrdcmd); |
| 396 |
my($err_1d) = RRDs::error; |
| 397 |
&log("created $imgdir/$machine/$type-1d.png\n") unless $err_1d; |
| 398 |
&error("Error generating 1d graph for $machine/$type: $err_1d\n") if $err_1d; |
| 399 |
RRDs::graph ("$imgdir/$machine/$type-1w.png", "--start=-604800", @rrdcmd); |
| 400 |
my($err_1w) = RRDs::error; |
| 401 |
&log("created $imgdir/$machine/$type-1w.png\n") unless $err_1w; |
| 402 |
&error("Error generating 1w graph for $machine/$type: $err_1w\n") if $err_1w; |
| 403 |
RRDs::graph ("$imgdir/$machine/$type-1m.png", "--start=-2678400", @rrdcmd); |
| 404 |
my($err_1m) = RRDs::error; |
| 405 |
&log("created $imgdir/$machine/$type-1m.png\n") unless $err_1m; |
| 406 |
&error("Error generating 1m graph for $machine/$type: $err_1m\n") if $err_1m; |
| 407 |
RRDs::graph ("$imgdir/$machine/$type-1y.png", "--start=-31536000", @rrdcmd); |
| 408 |
my($err_1y) = RRDs::error; |
| 409 |
&log("created $imgdir/$machine/$type-1y.png\n") unless $err_1y; |
| 410 |
&error("Error generating 1y graph for $machine/$type: $err_1y\n") if $err_1y; |
| 411 |
return; |
| 412 |
} |
| 413 |
|
| 414 |
# subroutine to add a legend |
| 415 |
# accepts reference to an array and a name |
| 416 |
sub addlegend() { |
| 417 |
my($dataref, $name) = @_; |
| 418 |
push @$dataref, "GPRINT:$name:LAST:Current\\: \%8.2lf %s"; |
| 419 |
push @$dataref, "GPRINT:$name:AVERAGE:Average\\: \%8.2lf %s"; |
| 420 |
push @$dataref, "GPRINT:$name:MAX:Max\\: \%8.2lf %s\\n"; |
| 421 |
} |
| 422 |
|
| 423 |
# hacky subroutine to return a colour |
| 424 |
# could be done much better somehow :/ |
| 425 |
sub get_colour { |
| 426 |
my($col) = @_; |
| 427 |
if($col == 0) { |
| 428 |
return "#0000FF"; |
| 429 |
} |
| 430 |
elsif($col == 1) { |
| 431 |
return "#00FF00"; |
| 432 |
} |
| 433 |
elsif($col == 2) { |
| 434 |
return "#FF00FF"; |
| 435 |
} |
| 436 |
elsif($col == 3) { |
| 437 |
return "#FFFF00"; |
| 438 |
} |
| 439 |
elsif($col == 4) { |
| 440 |
return "#00FFFF"; |
| 441 |
} |
| 442 |
else { |
| 443 |
return "#000066"; |
| 444 |
} |
| 445 |
} |
| 446 |
|
| 447 |
# prints out usage information then exits |
| 448 |
sub usage() { |
| 449 |
print "Usage: graph.pl [options]\n"; |
| 450 |
print "Options\n"; |
| 451 |
print " -c config Specifies the configuration file\n"; |
| 452 |
print " default: rrdgraphing.conf\n"; |
| 453 |
print " -v Be verbose about what's happening\n"; |
| 454 |
print " -q Be quiet, even supress errors\n"; |
| 455 |
print " -V Print version number\n"; |
| 456 |
print " -h Prints this help page\n"; |
| 457 |
exit(1); |
| 458 |
} |
| 459 |
|
| 460 |
# prints a log message if verbose is turned on |
| 461 |
sub log() { |
| 462 |
my($msg) = @_; |
| 463 |
print $msg if $verbose; |
| 464 |
} |
| 465 |
|
| 466 |
# prints an error message unless quiet is turned on |
| 467 |
sub error() { |
| 468 |
my($msg) = @_; |
| 469 |
print STDERR $msg unless $quiet; |
| 470 |
} |
