src/collectd.pod

   1 =head1 NAME
   2
   3 collectd - System statistics collection daemon
   4
   5 =head1 SYNOPSIS
   6
   7 collectd I<[options]>
   8
   9 =head1 DESCRIPTION
  10
  11 collectd is a daemon that collects various system statistics periodically and
  12 stores them into RRD-files. Which data is collected depends on compile-time
  13 settings. The following features may be available:
  14
  15 =over 4
  16
  17 =item
  18
  19 Apache server stats (I<apache>)
  20
  21 =item
  22
  23 Apple hardware sensors (I<apple_sensors>, Darwin only)
  24
  25 =item
  26
  27 Battery status (I<battery>)
  28
  29 =item
  30
  31 CPU utilization (I<cpu>)
  32
  33 =item
  34
  35 Mountpoint usage (I<df>)
  36
  37 =item
  38
  39 Disk and partition usage/throughput (I<disk>)
  40
  41 =item
  42
  43 DNS traffic (I<dns>)
  44
  45 =item
  46
  47 Email usage (I<email>)
  48
  49 =item
  50
  51 Harddisk temperatures (I<hddtemp>)
  52
  53 =item
  54
  55 System load averages (I<load>)
  56
  57 =item
  58
  59 Motherboard monitor (I<mbmon>)
  60
  61 =item
  62
  63 Memory usage (I<memory>)
  64
  65 =item
  66
  67 MySQL statistics (I<mysql>)
  68
  69 =item
  70
  71 NFS utilization (I<nfs>, Linux only)
  72
  73 =item
  74
  75 Network latency (I<ping>)
  76
  77 =item
  78
  79 Number of processes (I<processes>, Linux only)
  80
  81 =item
  82
  83 lm_sensors information (I<sensors>, Linux only)
  84
  85 =item
  86
  87 Serial port traffic (I<serial>, Linux only)
  88
  89 =item
  90
  91 Swap usage (I<swap>)
  92
  93 =item
  94
  95 Tape drive usage (I<tape>, Solaris only)
  96
  97 =item
  98
  99 Network traffic (I<traffic>)
 100
 101 =item
 102
 103 Number of users logged into the system (I<users>)
 104
 105 =item
 106
 107 System ressources used by VServers (I<vserver>)
 108
 109 =item
 110
 111 Wireless network stats (I<wireless>)
 112
 113 =back
 114
 115 =head1 OPTIONS
 116
 117 =over 4
 118
 119 =item B<-C> I<E<lt>config-fileE<gt>>
 120
 121 Specify an alternative config file. This is the place to go when you wish to
 122 change B<collectd>'s behavior. The path may be relative to the current working
 123 directory.
 124
 125 =item B<-P> I<E<lt>pid-fileE<gt>>
 126
 127 Specify an alternative pid file. This overwrites any settings in the config
 128 file. This is thought for init-scripts that require the PID-file in a certain
 129 directory to work correctly. For everyday-usage use the B<PIDFile>
 130 config-option.
 131
 132 =item B<-f>
 133
 134 Don't fork to the background. I<collectd> will also B<not> close standard file
 135 descriptors, detach from the session nor write a pid file. This is mainly
 136 thought for 'supervisioning' init replacements such as I<runit>.
 137
 138 =item B<-h>
 139
 140 Output usage information and exit.
 141
 142 =back
 143
 144 =head1 MODES
 145
 146 collectd can operate in four different operating modes. The modes are described
 147 below.
 148
 149 The simplest mode is the so called B<local mode>. Data is collected locally and
 150 written in RRD files that reside in I<DataDir>. This is the default mode when
 151 collectd is linked against C<librrd>.
 152
 153 The modes B<client mode> and B<server mode> are used to send data over a
 154 network and receive it again.
 155
 156 In B<client mode> the daemon collects the data locally and sends its results
 157 to one or more network addresses. No RRD files are written locally in this
 158 case. If collectd is not linked against C<librrd> this is the default mode.
 159
 160 If started in B<server mode> the daemon will listen on one or more interfaces
 161 and write the data it receives to RRD files. No data is collected locally.
 162
 163 In the last mode, B<log mode>, data is collected locally and written in
 164 text files that reside in I<DataDir>.
 165
 166 Please refer to L<collectd.conf(5)> for the configuration options and default
 167 values.
 168
 169 =head1 SPECIAL PLUGINS
 170
 171 =head2 apache
 172
 173 This module connects to an Apache webserver and expects the output produced by
 174 B<mod_status.c>. If requires B<libcurl> to set up the HTTP connection and issue
 175 the request(s). The following is a sample config for the Apache webserver. The
 176 use of C<ExtendedStatus on> is mandatory.
 177
 178   ExtendedStatus on
 179   <IfModule mod_status.c>
 180     <Location /mod_status>
 181       SetHandler server-status
 182     </Location>
 183   </IfModule>
 184
 185 This plugin requires further configuration. Please read L<collectd.conf(5)>.
 186
 187 =head2 cpufreq
 188
 189 This module reads F</sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq> (for
 190 the first CPU installed) to get the current CPU frequency. If this file does
 191 not exist make sure B<cpufreqd> (L<http://cpufreqd.sourceforge.net/>) or a
 192 similar tool is installed and an "cpu governor" (that's kernel module) is
 193 loaded.
 194
 195 =head2 email
 196
 197 This plugin collects data indirectly by providing a UNIX socket that external
 198 programs can connect to. A simple line based protocol is used to communicate
 199 with the plugin:
 200
 201 E-Mail type (e.g. "ham", "spam", "virus", ...) and size (bytes):
 202
 203   e:<type>:<size>
 204
 205 Spam score:
 206
 207   s:<value>
 208
 209 Successful spam checks (e.g. "BAYES_99", "SUBJECT_DRUG_GAP_C", ...):
 210
 211   c:<type1>[,<type2>,...]
 212
 213 Each line is limited to 256 characters (including the newline character).
 214 Longer lines will be ignored.
 215
 216 =head2 mysql
 217
 218 Requires B<mysqlclient> to be installed. It connects to the database when
 219 started and keeps the connection up as long as possible. When the connection is
 220 interrupted for whatever reason it will try to re-connect. The syslog will
 221 contain loud complaints in case anything goes wrong.
 222
 223 This plugin issues C<SHOW STATUS> and evaluates C<Bytes_{received,sent}>,
 224 C<Com_*> and C<Handler_*> which correspond to F<traffic-mysql.rrd>,
 225 F<mysql_commands-*.rrd> and F<mysql_handler-*.rrd>. Also, the values of
 226 C<Qcache_*> are put in F<mysql_qcache.rrd> and values of C<Threads_*> are put
 227 in F<mysql_threads.rrd>. Please refer to the B<MySQL reference manual>,
 228 I<5.2.4. Server Status Variables> for an explanation of these values.
 229
 230 =head2 sensors
 231
 232 The B<sensors> module uses lm_sensors to retrieve sensor-values. This means
 233 that all the needed modules have to be loaded and lm_sensors has to be
 234 configured (most likely by editing F</etc/sensors.conf>. Read
 235 L<sensors.conf(5)> for details.
 236
 237 The B<lm_sensors> homepage can be found at
 238 L<http://secure.netroedge.com/~lm78/>.
 239
 240 =head2 mbmon
 241
 242 The B<mbmon> module uses mbmon to retrieve temperature, voltage, etc.
 243
 244 collectd connects to B<localhost> (127.0.0.1), port B<411/tcp>.
 245 The B<Host> and B<Port> options can be used to change these
 246 default values. See L<collectd.conf(5)> for details. C<mbmon> has to be
 247 running to work correctly. If C<mbmon> is not running timeouts may appear
 248 which may interfere with other statistics..
 249
 250 C<mbmon> must be run with the -r option ("print TAG and Value format");
 251 Debian's /etc/init.d/mbmon script already does this, other people
 252 will need to ensure that this is the case.
 253
 254 =head2 hddtemp
 255
 256 To get values from B<hddtemp> collectd connects to B<localhost> (127.0.0.1),
 257 port B<7634/tcp>. The B<Host> and B<Port> options can be used to change these
 258 default values. See L<collectd.conf(5)> for details. C<hddtemp> has to be
 259 running to work correctly. If C<hddtemp> is not running timeouts may appear
 260 which may interfere with other statistics..
 261
 262 The B<hddtemp> homepage can be found at
 263 L<http://www.guzu.net/linux/hddtemp.php>.
 264
 265 =head2 vserver
 266
 267 B<VServer> support is only available for Linux. It cannot yet be found in a
 268 vanilla kernel, though. To make use of this plugin you need a kernel that has
 269 B<VServer> support built in, i.e. you need to apply the patches and compile
 270 your own kernel, which will then provide the /proc/virtual filesystem that is
 271 required by this plugin.
 272
 273 The B<VServer> homepage can be found at L<http://linux-vserver.org/>.
 274
 275 =head1 RRD FILES
 276
 277 The RRD files are created automatically. The size of the RRAs depend on the
 278 compile time settings of I<step> and I<width>. With the default values (I<step>
 279 = B<10>, I<width> = B<1200>) the following RRAs are created:
 280
 281   RRA:AVERAGE:0.1:1:8640
 282   RRA:AVERAGE:0.1:50:1210
 283   RRA:AVERAGE:0.1:223:1202
 284   RRA:AVERAGE:0.1:2635:1201
 285   RRA:MIN:0.1:1:8640
 286   RRA:MIN:0.1:50:1210
 287   RRA:MIN:0.1:223:1202
 288   RRA:MIN:0.1:2635:1201
 289   RRA:MAX:0.1:1:8640
 290   RRA:MAX:0.1:50:1210
 291   RRA:MAX:0.1:223:1202
 292   RRA:MAX:0.1:2635:1201
 293
 294 By default collectd uses a 10 second I<step>. Thus the RRAs contain the
 295 following timespans. If you've changed the I<step> at compile time you will
 296 have calculate resolution and timespan yourself.
 297
 298   PDP per CDP |  Resolution  | Data points | Timespan
 299   ------------+--------------+-------------+---------
 300             1 | 10.0 seconds !        8640 ! 1 day
 301            50 |  8.3 minutes |        1210 | 1 week
 302           223 | 37.2 minutes |        1202 | 1 month
 303          2635 |  7.3 hours   |        1201 | 1 year
 304
 305 The DS'es depend on the module creating the RRD files:
 306
 307 =over 4
 308
 309 =item Apache traffic (F<apache/apache_bytes.rrd>)
 310
 311   DS:count:COUNTER:HEARTBEAT:0:134217728
 312
 313 =item Apache requests (F<apache/apache_requests.rrd>)
 314
 315   DS:count:COUNTER:HEARTBEAT:0:1048576
 316
 317 =item Apache scoreboard (F<apache/apache_scoreboard-I<E<lt>nameE<gt>>.rrd>)
 318
 319   DS:count:GAUGE:HEARTBEAT:0:U
 320
 321 =item Apple temperature sensor (F<apple_sensors/temperature-I<E<lt>nameE<gt>>.rrd>)
 322
 323   DS:value:GAUGE:HEARTBEAT:U:U
 324
 325 =item Apple fanspeed sensor (F<apple_sensors/fanspeed-I<E<lt>nameE<gt>>.rrd>)
 326
 327   DS:value:GAUGE:HEARTBEAT:U:U
 328
 329 =item Battery charge (F<battery-I<E<lt>nameE<gt>>/charge.rrd>)
 330
 331   DS:charge:GAUGE:HEARTBEAT:0:U
 332
 333 =item Battery current (F<battery-I<E<lt>nameE<gt>>/current.rrd>)
 334
 335   DS:current:GAUGE:HEARTBEAT:U:U
 336
 337 =item Battery voltage (F<battery-I<E<lt>nameE<gt>>/voltage.rrd>)
 338
 339   DS:voltage:GAUGE:HEARTBEAT:U:U
 340
 341 =item CPU (F<cpu-I<E<lt>numE<gt>>.rrd>)
 342
 343   DS:user:COUNTER:HEARTBEAT:0:100
 344   DS:nice:COUNTER:HEARTBEAT:0:100
 345   DS:syst:COUNTER:HEARTBEAT:0:100
 346   DS:idle:COUNTER:HEARTBEAT:0:100
 347   DS:wait:COUNTER:HEARTBEAT:0:100
 348
 349 =item CPU frequency (F<cpufreq-I<E<lt>numE<gt>>.rrd>)
 350
 351   DS:value:GAUGE:HEARTBEAT:0:U
 352
 353 =item Mountpoints (F<df-I<E<lt>pathE<gt>>.rrd>)
 354
 355   DS:used:GAUGE:HEARTBEAT:0:U
 356   DS:free:GAUGE:HEARTBEAT:0:U
 357
 358 =item Diskstats (F<disk-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 359
 360   DS:rcount:COUNTER:HEARTBEAT:0:U
 361   DS:rmerged:COUNTER:HEARTBEAT:0:U
 362   DS:rbytes:COUNTER:HEARTBEAT:0:U
 363   DS:rtime:COUNTER:HEARTBEAT:0:U
 364   DS:wcount:COUNTER:HEARTBEAT:0:U
 365   DS:wmerged:COUNTER:HEARTBEAT:0:U
 366   DS:wbytes:COUNTER:HEARTBEAT:0:U
 367   DS:wtime:COUNTER:HEARTBEAT:0:U
 368
 369 =item Diskstats (F<partition-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 370
 371   DS:rcount:COUNTER:HEARTBEAT:0:U
 372   DS:rbytes:COUNTER:HEARTBEAT:0:U
 373   DS:wcount:COUNTER:HEARTBEAT:0:U
 374   DS:wbytes:COUNTER:HEARTBEAT:0:U
 375
 376 =item E-Mail count (F<email/email-I<E<lt>typeE<gt>>.rrd>)
 377
 378   DS:count:GAUGE:HEARTBEAT:0:U
 379
 380 =item E-Mail size (F<email/email_size-I<E<lt>typeE<gt>>.rrd>)
 381
 382   DS:size:GAUGE:HEARTBEAT:0:U
 383
 384 =item HDD Temperature (F<hddtemp-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 385
 386   DS:value:GAUGE:HEARTBEAT:U:U
 387
 388 =item System load (F<load.rrd>)
 389
 390   DS:shortterm:GAUGE:HEARTBEAT:0:100
 391   DS:midterm:GAUGE:HEARTBEAT:0:100
 392   DS:longterm:GAUGE:HEARTBEAT:0:100
 393
 394 =item Memory usage (F<memory.rrd>)
 395
 396   DS:used:GAUGE:HEARTBEAT:0:9223372036854775807
 397   DS:free:GAUGE:HEARTBEAT:0:9223372036854775807
 398   DS:buffers:GAUGE:HEARTBEAT:0:9223372036854775807
 399   DS:cached:GAUGE:HEARTBEAT:0:9223372036854775807
 400
 401 =item MySQL commands and handlers (F<mysql_commands-I<E<lt>commandE<gt>>.rrd> and F<mysql_handler-I<E<lt>handlerE<gt>>.rrd>)
 402
 403   DS:value:COUNTER:HEARTBEAT:0:U
 404
 405 =item MySQL query cache (F<mysql_qcache.rrd>)
 406
 407   DS:hits:COUNTER:HEARTBEAT:0:U
 408   DS:inserts:COUNTER:HEARTBEAT:0:U
 409   DS:not_cached:COUNTER:HEARTBEAT:0:U
 410   DS:lowmem_prunes:COUNTER:HEARTBEAT:0:U
 411   DS:queries_in_cache:GAUGE:HEARTBEAT:0:U
 412
 413 =item MySQL threads (F<mysql_threads.rrd>)
 414
 415   DS:running:GAUGE:HEARTBEAT:0:U
 416   DS:connected:GAUGE:HEARTBEAT:0:U
 417   DS:cached:GAUGE:HEARTBEAT:0:U
 418   DS:created:COUNTER:HEARTBEAT:0:U
 419
 420 =item NFSv2 Procedures (F<nfs2_procedures-I<(client|server)>.rrd>)
 421
 422   DS:null:COUNTER:HEARTBEAT:0:U
 423   DS:getattr:COUNTER:HEARTBEAT:0:U
 424   DS:setattr:COUNTER:HEARTBEAT:0:U
 425   DS:root:COUNTER:HEARTBEAT:0:U
 426   DS:lookup:COUNTER:HEARTBEAT:0:U
 427   DS:readlink:COUNTER:HEARTBEAT:0:U
 428   DS:read:COUNTER:HEARTBEAT:0:U
 429   DS:wrcache:COUNTER:HEARTBEAT:0:U
 430   DS:write:COUNTER:HEARTBEAT:0:U
 431   DS:create:COUNTER:HEARTBEAT:0:U
 432   DS:remove:COUNTER:HEARTBEAT:0:U
 433   DS:rename:COUNTER:HEARTBEAT:0:U
 434   DS:link:COUNTER:HEARTBEAT:0:U
 435   DS:symlink:COUNTER:HEARTBEAT:0:U
 436   DS:mkdir:COUNTER:HEARTBEAT:0:U
 437   DS:rmdir:COUNTER:HEARTBEAT:0:U
 438   DS:readdir:COUNTER:HEARTBEAT:0:U
 439   DS:fsstat:COUNTER:HEARTBEAT:0:U
 440
 441 =item NFSv3 Procedures (F<nfs3_procedures-I<(client|server)>.rrd>)
 442
 443   DS:null:COUNTER:HEARTBEAT:0:U
 444   DS:getattr:COUNTER:HEARTBEAT:0:U
 445   DS:setattr:COUNTER:HEARTBEAT:0:U
 446   DS:lookup:COUNTER:HEARTBEAT:0:U
 447   DS:access:COUNTER:HEARTBEAT:0:U
 448   DS:readlink:COUNTER:HEARTBEAT:0:U
 449   DS:read:COUNTER:HEARTBEAT:0:U
 450   DS:write:COUNTER:HEARTBEAT:0:U
 451   DS:create:COUNTER:HEARTBEAT:0:U
 452   DS:mkdir:COUNTER:HEARTBEAT:0:U
 453   DS:symlink:COUNTER:HEARTBEAT:0:U
 454   DS:mknod:COUNTER:HEARTBEAT:0:U
 455   DS:remove:COUNTER:HEARTBEAT:0:U
 456   DS:rmdir:COUNTER:HEARTBEAT:0:U
 457   DS:rename:COUNTER:HEARTBEAT:0:U
 458   DS:link:COUNTER:HEARTBEAT:0:U
 459   DS:readdir:COUNTER:HEARTBEAT:0:U
 460   DS:readdirplus:COUNTER:HEARTBEAT:0:U
 461   DS:fsstat:COUNTER:HEARTBEAT:0:U
 462   DS:fsinfo:COUNTER:HEARTBEAT:0:U
 463   DS:pathconf:COUNTER:HEARTBEAT:0:U
 464   DS:commit:COUNTER:HEARTBEAT:0:U
 465
 466 =item Network latency / Ping (F<ping-I<E<lt>hostnameE<gt>>.rrd>)
 467
 468   DS:ping:GAUGE:HEARTBEAT:0:65535
 469
 470 =item Processes (F<processes.rrd>)
 471
 472   DS:running:GAUGE:HEARTBEAT:0:65535
 473   DS:sleeping:GAUGE:HEARTBEAT:0:65535
 474   DS:zombies:GAUGE:HEARTBEAT:0:65535
 475   DS:stopped:GAUGE:HEARTBEAT:0:65535
 476   DS:paging:GAUGE:HEARTBEAT:0:65535
 477   DS:blocked:GAUGE:HEARTBEAT:0:65535
 478
 479 =item lm_sensors fanspeed sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/fanspeed-I<E<lt>instE<gt>>.rrd>)
 480
 481   DS:value:GAUGE:HEARTBEAT:U:U
 482
 483 =item lm_sensors temperature sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/temperature-I<E<lt>instE<gt>>.rrd>)
 484
 485   DS:value:GAUGE:HEARTBEAT:U:U
 486
 487 =item lm_sensors voltage sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/voltage-I<E<lt>instE<gt>>.rrd>)
 488
 489   DS:voltage:GAUGE:HEARTBEAT:U:U
 490
 491 =item Serial port traffic (F<serial-I<E<lt>numE<gt>>.rrd>)
 492
 493   DS:incoming:COUNTER:HEARTBEAT:0:U
 494   DS:outgoing:COUNTER:HEARTBEAT:0:U
 495
 496 =item Spam score (F<email/spam_score.rrd>)
 497
 498   DS:score:GAUGE:HEARTBEAT:0:U
 499
 500 =item Spam checks (F<email/spam_check-I<E<lt>typeE<gt>>.rrd>)
 501
 502   DS:hits:GAUGE:HEARTBEAT:0:U
 503
 504 =item Swap usage (F<swap.rrd>)
 505
 506   DS:used:GAUGE:HEARTBEAT:0:1099511627776
 507   DS:free:GAUGE:HEARTBEAT:0:1099511627776
 508   DS:cached:GAUGE:HEARTBEAT:0:1099511627776
 509   DS:resv:GAUGE:HEARTBEAT:0:1099511627776
 510
 511 =item Tape drive usage (F<tape-I<E<lt>nameE<gt>>.rrd>)
 512
 513   DS:rcount:COUNTER:HEARTBEAT:0:
 514   DS:rmerged:COUNTER:HEARTBEAT:0:U
 515   DS:rbytes:COUNTER:HEARTBEAT:0:U
 516   DS:rtime:COUNTER:HEARTBEAT:0:U
 517   DS:wcount:COUNTER:HEARTBEAT:0:U
 518   DS:wmerged:COUNTER:HEARTBEAT:0:U
 519   DS:wbytes:COUNTER:HEARTBEAT:0:U
 520   DS:wtime:COUNTER:HEARTBEAT:0:U
 521
 522 =item Network traffic (F<traffic-I<E<lt>interfaceE<gt>>.rrd>)
 523
 524   DS:incoming:COUNTER:HEARTBEAT:0:U
 525   DS:outgoing:COUNTER:HEARTBEAT:0:U
 526
 527 =item Interface packets (F<if_packets-I<E<lt>interfaceE<gt>>.rrd>)
 528
 529   DS:rx:COUNTER:HEARTBEAT:0:U
 530   DS:tx:COUNTER:HEARTBEAT:0:U
 531
 532 =item Interface errors (F<if_errors-I<E<lt>interfaceE<gt>>.rrd>)
 533
 534   DS:rx:COUNTER:HEARTBEAT:0:U
 535   DS:tx:COUNTER:HEARTBEAT:0:U
 536
 537 =item Users (F<users.rrd>)
 538
 539   DS:users:GAUGE:HEARTBEAT:0:65535
 540
 541 =item VServer load (F<vserver-I<E<lt>xidE<gt>>/load.rrd>)
 542
 543   DS:shortterm:GAUGE:HEARTBEAT:0:100
 544   DS:midterm:GAUGE:HEARTBEAT:0:100
 545   DS:longterm:GAUGE:HEARTBEAT:0:100
 546
 547 =item VServer threads (F<vserver-I<E<lt>xidE<gt>>/threads.rrd>)
 548
 549   DS:total:GAUGE:HEARTBEAT:0:65535
 550   DS:running:GAUGE:HEARTBEAT:0:65535
 551   DS:uninterruptible:GAUGE:HEARTBEAT:0:65535
 552   DS:onhold:GAUGE:HEARTBEAT:0:65535
 553
 554 =item VServer network traffic (F<vserver-I<E<lt>xidE<gt>>/traffic-I<E<lt>nameE<gt>>.rrd>)
 555
 556   DS:incoming:COUNTER:HEARTBEAT:0:9223372036854775807
 557   DS:outgoing:COUNTER:HEARTBEAT:0:9223372036854775807
 558   DS:failed:COUNTER:HEARTBEAT:0:9223372036854775807
 559
 560 =item VServer processes (F<vserver-I<E<lt>xidE<gt>>/vs_processes.rrd>)
 561
 562   DS:total:GAUGE:HEARTBEAT:0:65535
 563
 564 =item VServer memory usage (F<vserver-I<E<lt>xidE<gt>>/vs_memory.rrd>)
 565
 566   DS:vm:GAUGE:HEARTBEAT:0:9223372036854775807
 567   DS:vml:GAUGE:HEARTBEAT:0:9223372036854775807
 568   DS:rss:GAUGE:HEARTBEAT:0:9223372036854775807
 569   DS:anon:GAUGE:HEARTBEAT:0:9223372036854775807
 570
 571 =item Wireless link quality (F<wireless-I<E<lt>interfaceE<gt>>.rrd>)
 572
 573   DS:quality:GAUGE:HEARTBEAT:0:U
 574   DS:power:GAUGE:HEARTBEAT:U:0
 575   DS:noise:GAUGE:HEARTBEAT:U:0
 576
 577 =back
 578
 579 =head1 SEE ALSO
 580
 581 L<collectd.conf(5)>, L<rrdtool(1)>, L<sensors(1)>, L<hddtemp(8)>,
 582 L<mbmon(1)>,
 583 L<kstat(3KSTAT)>
 584
 585 =head1 AUTHOR
 586
 587 Florian Forster E<lt>octo@verplant.orgE<gt>
 588
 589 =cut