3 collectd - System statistics collection daemon
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:
19 Apache server stats (I<apache>)
23 Apple hardware sensors (I<apple_sensors>, Darwin only)
27 Battery status (I<battery>)
31 CPU utilization (I<cpu>)
35 Mountpoint usage (I<df>)
39 Disk and partition usage/throughput (I<disk>)
43 Harddisk temperatures (I<hddtemp>)
47 System load averages (I<load>)
51 Memory usage (I<memory>)
55 MySQL statistics (I<mysql>)
59 NFS utilization (I<nfs>, Linux only)
63 Network latency (I<ping>)
67 Number of processes (I<processes>, Linux only)
71 lm_sensors information (I<sensors>, Linux only)
75 Serial port traffic (I<serial>, Linux only)
83 Tape drive usage (I<tape>, Solaris only)
87 Network traffic (I<traffic>)
91 Number of users logged into the system (I<users>)
95 System ressources used by VServers (I<vserver>)
99 Wireless network stats (I<wireless>)
107 =item B<-C> I<E<lt>config-fileE<gt>>
109 Specify an alternative config file. This is the place to go when you wish to
110 change B<collectd>'s behavior. The path may be relative to the current working
115 Don't fork to the background. I<collectd> will also B<not> close standard file
116 descriptors, detach from the session nor write a pid file. This is mainly
117 thought for 'supervisioning' init replacements such as I<runit>.
121 Output usage information and exit.
127 collectd can operate in three different operating modes. The modes are
130 The simplest mode is the so called B<local mode>. Data is collected locally and
131 written in RRD files that reside in I<DataDir>. This is the default mode when
132 collectd is linked against C<librrd>.
134 The other modes, B<client mode> and B<server mode>, are used to send data over
135 a network and receive it again.
137 In B<client mode> the daemon collects the data locally and sends its results
138 to one or more network addresses. No RRD files are written in this case. This
139 is the only mode available if collectd is not linked against C<librrd>.
141 If started in B<server mode> the daemon will listen on one or more interfaces
142 and write the data it receives to RRD files. No data is collected locally.
144 In the last mode, B<log mode>, data is collected locally and written in
145 text files that reside in I<DataDir>.
147 Please refer to L<collectd.conf(5)> for the configuration options and default
150 =head1 SPECIAL PLUGINS
154 This module connects to an Apache webserver and expects the output produced by
155 B<mod_status.c>. If requires B<libcurl> to set up the HTTP connection and issue
156 the request(s). The following is a sample config for the Apache webserver. The
157 use of C<ExtendedStatus on> is mandatory.
160 <IfModule mod_status.c>
161 <Location /mod_status>
162 SetHandler server-status
166 This plugin requires further configuration. Please read L<collectd.conf(5)>.
170 This module reads F</sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq> (for
171 the first CPU installed) to get the current CPU frequency. If this file does
172 not exist make sure B<cpufreqd> (L<http://cpufreqd.sourceforge.net/>) or a
173 similar tool is installed and an "cpu governor" (that's kernel module) is
178 Requires B<mysqlclient> to be installed. It connects to the database when
179 started and keeps the connection up as long as possible. When the connection is
180 interrupted for whatever reason it will try to re-connect. The syslog will
181 contain loud complaints in case anything goes wrong.
183 This plugin issues C<SHOW STATUS> and evaluates C<Bytes_{received,sent}>,
184 C<Com_*> and C<Handler_*> which correspond to F<traffic-mysql.rrd>,
185 F<mysql_commands-*.rrd> and F<mysql_handler-*.rrd>. Also, the values of
186 C<Qcache_*> are put in F<mysql_qcache.rrd> and values of C<Threads_*> are put
187 in F<mysql_threads.rrd>. Please refer to the B<MySQL reference manual>,
188 I<5.2.4. Server Status Variables> for an explanation of these values.
192 The B<sensors> module uses lm_sensors to retrieve sensor-values. This means
193 that all the needed modules have to be loaded and lm_sensors has to be
194 configured (most likely by editing F</etc/sensors.conf>. Read
195 L<sensors.conf(5)> for details.
197 The B<lm_sensors> homepage can be found at
198 L<http://secure.netroedge.com/~lm78/>.
202 To get values from B<hddtemp> collectd connects to B<localhost> (127.0.0.1),
203 port B<7634/tcp>. The B<Host> and B<Port> options can be used to change these
204 default values. See L<collectd.conf(5)> for details. C<hddtemp> has to be
205 running to work correctly. If C<hddtemp> is not running timeouts may appear
206 which may interfere with other statistics..
208 The B<hddtemp> homepage can be found at
209 L<http://www.guzu.net/linux/hddtemp.php>.
213 B<VServer> support is only available for Linux. It cannot yet be found in a
214 vanilla kernel, though. To make use of this plugin you need a kernel that has
215 B<VServer> support built in, i.e. you need to apply the patches and compile
216 your own kernel, which will then provide the /proc/virtual filesystem that is
217 required by this plugin.
219 The B<VServer> homepage can be found at L<http://linux-vserver.org/>.
223 The RRD files are created automatically. The size of the RRAs depend on the
224 compile time settings of I<step> and I<width>. With the default values (I<step>
225 = B<10>, I<width> = B<1200>) the following RRAs are created:
227 RRA:AVERAGE:0.1:1:8640
228 RRA:AVERAGE:0.1:50:1210
229 RRA:AVERAGE:0.1:223:1202
230 RRA:AVERAGE:0.1:2635:1201
234 RRA:MIN:0.1:2635:1201
238 RRA:MAX:0.1:2635:1201
240 By default collectd uses a 10 second I<step>. Thus the RRAs contain the
241 following timespans. If you've changed the I<step> at compile time you will
242 have calculate resolution and timespan yourself.
244 PDP per CDP | Resolution | Data points | Timespan
245 ------------+--------------+-------------+---------
246 1 | 10.0 seconds ! 8640 ! 1 day
247 50 | 8.3 minutes | 1210 | 1 week
248 223 | 37.2 minutes | 1202 | 1 month
249 2635 | 7.3 hours | 1201 | 1 year
251 The DS'es depend on the module creating the RRD files:
255 =item Apache traffic (F<apache/apache_bytes.rrd>)
257 DS:count:COUNTER:HEARTBEAT:0:134217728
259 =item Apache requests (F<apache/apache_requests.rrd>)
261 DS:count:COUNTER:HEARTBEAT:0:1048576
263 =item Apache scoreboard (F<apache/apache_scoreboard-I<E<lt>nameE<gt>>.rrd>)
265 DS:count:GAUGE:HEARTBEAT:0:U
267 =item Battery charge (F<battery-I<E<lt>nameE<gt>>/charge.rrd>)
269 DS:charge:GAUGE:25:0:U
271 =item Battery current (F<battery-I<E<lt>nameE<gt>>/current.rrd>)
273 DS:current:GAUGE:25:U:U
275 =item Battery voltage (F<battery-I<E<lt>nameE<gt>>/voltage.rrd>)
277 DS:voltage:GAUGE:25:U:U
279 =item CPU (F<cpu-I<E<lt>numE<gt>>.rrd>)
281 DS:user:COUNTER:25:0:100
282 DS:nice:COUNTER:25:0:100
283 DS:syst:COUNTER:25:0:100
284 DS:idle:COUNTER:25:0:100
285 DS:wait:COUNTER:25:0:100
287 =item Mountpoints (F<df-I<E<lt>pathE<gt>>.rrd>)
292 =item Diskstats (F<disk-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
294 DS:rcount:COUNTER:25:0:U
295 DS:rmerged:COUNTER:25:0:U
296 DS:rbytes:COUNTER:25:0:U
297 DS:rtime:COUNTER:25:0:U
298 DS:wcount:COUNTER:25:0:U
299 DS:wmerged:COUNTER:25:0:U
300 DS:wbytes:COUNTER:25:0:U
301 DS:wtime:COUNTER:25:0:U
303 =item Diskstats (F<partition-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
305 DS:rcount:COUNTER:25:0:U
306 DS:rbytes:COUNTER:25:0:U
307 DS:wcount:COUNTER:25:0:U
308 DS:wbytes:COUNTER:25:0:U
310 =item HDD Temperature (F<hddtemp-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
312 DS:value:GAUGE:25:U:U
314 =item System load (F<load.rrd>)
316 DS:shortterm:GAUGE:25:0:100
317 DS:midterm:GAUGE:25:0:100
318 DS:longterm:GAUGE:25:0:100
320 =item Memory usage (F<memory.rrd>)
322 DS:used:GAUGE:25:0:9223372036854775807
323 DS:free:GAUGE:25:0:9223372036854775807
324 DS:buffers:GAUGE:25:0:9223372036854775807
325 DS:cached:GAUGE:25:0:9223372036854775807
327 =item MySQL commands and handlers (F<mysql_commands-I<E<lt>commandE<gt>>.rrd> and F<mysql_handler-I<E<lt>handlerE<gt>>.rrd>)
329 DS:value:COUNTER:25:0:U
331 =item MySQL query cache (F<mysql_qcache.rrd>)
333 DS:hits:COUNTER:25:0:U
334 DS:inserts:COUNTER:25:0:U
335 DS:not_cached:COUNTER:25:0:U
336 DS:lowmem_prunes:COUNTER:25:0:U
337 DS:queries_in_cache:GAUGE:25:0:U
339 =item MySQL threads (F<mysql_threads.rrd>)
341 DS:running:GAUGE:25:0:U
342 DS:connected:GAUGE:25:0:U
343 DS:cached:GAUGE:25:0:U
344 DS:created:COUNTER:25:0:U
346 =item NFSv2 Procedures (F<nfs2_procedures-I<(client|server)>.rrd>)
348 DS:null:COUNTER:25:0:U
349 DS:getattr:COUNTER:25:0:U
350 DS:setattr:COUNTER:25:0:U
351 DS:root:COUNTER:25:0:U
352 DS:lookup:COUNTER:25:0:U
353 DS:readlink:COUNTER:25:0:U
354 DS:read:COUNTER:25:0:U
355 DS:wrcache:COUNTER:25:0:U
356 DS:write:COUNTER:25:0:U
357 DS:create:COUNTER:25:0:U
358 DS:remove:COUNTER:25:0:U
359 DS:rename:COUNTER:25:0:U
360 DS:link:COUNTER:25:0:U
361 DS:symlink:COUNTER:25:0:U
362 DS:mkdir:COUNTER:25:0:U
363 DS:rmdir:COUNTER:25:0:U
364 DS:readdir:COUNTER:25:0:U
365 DS:fsstat:COUNTER:25:0:U
367 =item NFSv3 Procedures (F<nfs3_procedures-I<(client|server)>.rrd>)
369 DS:null:COUNTER:25:0:U
370 DS:getattr:COUNTER:25:0:U
371 DS:setattr:COUNTER:25:0:U
372 DS:lookup:COUNTER:25:0:U
373 DS:access:COUNTER:25:0:U
374 DS:readlink:COUNTER:25:0:U
375 DS:read:COUNTER:25:0:U
376 DS:write:COUNTER:25:0:U
377 DS:create:COUNTER:25:0:U
378 DS:mkdir:COUNTER:25:0:U
379 DS:symlink:COUNTER:25:0:U
380 DS:mknod:COUNTER:25:0:U
381 DS:remove:COUNTER:25:0:U
382 DS:rmdir:COUNTER:25:0:U
383 DS:rename:COUNTER:25:0:U
384 DS:link:COUNTER:25:0:U
385 DS:readdir:COUNTER:25:0:U
386 DS:readdirplus:COUNTER:25:0:U
387 DS:fsstat:COUNTER:25:0:U
388 DS:fsinfo:COUNTER:25:0:U
389 DS:pathconf:COUNTER:25:0:U
390 DS:commit:COUNTER:25:0:U
392 =item Network latency / Ping (F<ping-I<E<lt>hostnameE<gt>>.rrd>)
394 DS:ping:GAUGE:25:0:65535
396 =item Processes (F<processes.rrd>)
398 DS:running:GAUGE:25:0:65535
399 DS:sleeping:GAUGE:25:0:65535
400 DS:zombies:GAUGE:25:0:65535
401 DS:stopped:GAUGE:25:0:65535
402 DS:paging:GAUGE:25:0:65535
403 DS:blocked:GAUGE:25:0:65535
405 =item lm_sensors (F<sensors-I<E<lt>chipE<gt>>-I<E<lt>featureE<gt>>.rrd>)
407 DS:value:GAUGE:25:U:U
409 =item Serial port traffic (F<serial-I<E<lt>numE<gt>>.rrd>)
411 DS:incoming:COUNTER:25:0:U
412 DS:outgoing:COUNTER:25:0:U
414 =item Swap usage (F<swap.rrd>)
416 DS:used:GAUGE:25:0:1099511627776
417 DS:free:GAUGE:25:0:1099511627776
418 DS:cached:GAUGE:25:0:1099511627776
419 DS:resv:GAUGE:25:0:1099511627776
421 =item Tape drive usage (F<tape-I<E<lt>nameE<gt>>.rrd>)
423 DS:rcount:COUNTER:25:0:
424 DS:rmerged:COUNTER:25:0:U
425 DS:rbytes:COUNTER:25:0:U
426 DS:rtime:COUNTER:25:0:U
427 DS:wcount:COUNTER:25:0:U
428 DS:wmerged:COUNTER:25:0:U
429 DS:wbytes:COUNTER:25:0:U
430 DS:wtime:COUNTER:25:0:U
432 =item Network traffic (F<traffic-I<E<lt>nameE<gt>>.rrd>)
434 DS:incoming:COUNTER:25:0:U
435 DS:outgoing:COUNTER:25:0:U
437 =item Users (F<users.rrd>)
439 DS:users:GAUGE:25:0:65535
441 =item VServer load (F<vserver-I<E<lt>xidE<gt>>/load.rrd>)
443 DS:shortterm:GAUGE:25:0:100
444 DS:midterm:GAUGE:25:0:100
445 DS:longterm:GAUGE:25:0:100
447 =item VServer threads (F<vserver-I<E<lt>xidE<gt>>/threads.rrd>)
449 DS:total:GAUGE:25:0:65535
450 DS:running:GAUGE:25:0:65535
451 DS:uninterruptible:GAUGE:25:0:65535
452 DS:onhold:GAUGE:25:0:65535
454 =item VServer network traffic (F<vserver-I<E<lt>xidE<gt>>/traffic-I<E<lt>nameE<gt>>.rrd>)
456 DS:incoming:COUNTER:25:0:9223372036854775807
457 DS:outgoing:COUNTER:25:0:9223372036854775807
458 DS:failed:COUNTER:25:0:9223372036854775807
460 =item VServer processes (F<vserver-I<E<lt>xidE<gt>>/vs_processes.rrd>)
462 DS:total:GAUGE:25:0:65535
464 =item VServer memory usage (F<vserver-I<E<lt>xidE<gt>>/vs_memory.rrd>)
466 DS:vm:GAUGE:25:0:9223372036854775807
467 DS:vml:GAUGE:25:0:9223372036854775807
468 DS:rss:GAUGE:25:0:9223372036854775807
469 DS:anon:GAUGE:25:0:9223372036854775807
475 L<collectd.conf(5)>, L<rrdtool(1)>, L<sensors(1)>, L<hddtemp(8)>,
480 Florian Forster E<lt>octo@verplant.orgE<gt>