1 collectd - System information collection daemon
2 =================================================
3 http://collectd.org/
5 About
6 -----
8 collectd is a small daemon which collects statistics about a computer's
9 usage and writes then into RRD files.
12 Features
13 --------
15 * collectd is able to collect the following data:
17 - Apache server utilization
18 (Number of bytes transfered, number of requests handled and detailed
19 scoreboard statistics)
21 - Apple Sensors
22 (Temperature, fanspeed and voltage sensors of apple computers)
24 - Battery
25 (Charge, current and charge of ACPI and PMU based batteries)
27 - CPU utilization
28 (Time spent in system, user, nice and idle)
30 - CPU frequency
31 (For laptops with speed step or a similar technology)
33 - Mountpoint usage
34 (Basically the values `df(1)' delivers)
36 - Disk utilization
37 (Sectors read/written, number of read/write actions, time spent doing IO)
39 - Harddisk temperatures
40 (Uhm, yeah, temperature of harddisks that is ;)
42 - System load
43 (Load average over the last 1, 5 and 15 minutes)
45 - Memory utilization
46 (Memory occupied by running processes, page cache, buffer cache and free)
48 - MySQL server statistics
49 (Commands issued, handlers triggered, thread usage, query cache
50 utilization and traffic sent/received)
52 - NFS Procedures
53 (Which NFS command were called how often. Only NFSv2 and NFSv3 right now)
55 - Ping latency
56 (Time to reach the default gateway or another given host)
58 - Process counts
59 (Number of running, sleeping, zombie, ... processes)
61 - Sensors
62 (System temperatured and fan rotation speeds)
64 - Serial
65 (RX and TX of serial interfaces)
67 - Swap
68 (Pages swapped out onto harddisk or whatever is called `swap' by the OS..)
70 - Tape
71 (Read and write bytes and operations on tape devices)
73 - Traffic
74 (In/Outbound traffic on the interfaces)
76 - Users
77 (Currently logged in users)
79 - VServer
80 (System ressources used by vservers)
82 - Wireless
83 (Link quality of wireless cards)
85 * Performance: Running as a daemon collectd doesn't spend much time in
86 startup. Since collectd links against libping, librrd and libsensors it
87 doesn't need to start any other processes.
89 * Hardly any maintenance neccessary and setup is trivial.
91 * Extremely easy and failsafe network operation possible.
94 Operation
95 ---------
97 * collectd's configuration file can be found at `sysconfdir'/collectd.conf.
98 Run `collectd -h' for a list of builtin defaults. See `collectd.conf(5)'
99 for a list of options and a syntax description.
101 * When running collectd writes system statistics in RRD-files. Per default
102 they reside in `/var/lib/collectd'.
104 * When using the `ping' plugin collectd needs to run as user root, since only
105 root can craft ICMP packages needed to ping other hosts. collectd should
106 NOT be installed setuid root since it can be used to overwrite valuable
107 files..
109 * Sample scripts to generate graphs reside in `contrib/' in the source
110 package or somewhere near `/usr/share/doc/collectd' in most distributions.
111 Please be aware that those script are meant as a starting point for your
112 own experiments.. Some of them require the `RRDs' Perl module.
113 (`librrds-perl' on Debian)
115 * The RRAs of the automatically created RRD files depend on the `step'
116 and `heartbeat' settings given on compile time. For a list of the
117 default RRAs take a look in the collectd(1) manpage.
120 Prerequisites
121 -------------
123 To compile collectd from source you will need:
125 * Usual suspects: C compiler, linker, preprocessor, make, ...
127 * rrdtool (headers and library; rrdtool 1.0 and 1.2 both work fine)
128 If built without `librrd' the resulting binary will be `client only', i.e.
129 will send it's values via multicast and not create any RRD files itself.
131 * libmysqlclient (optional)
133 * lm-sensors (optional)
135 * libstatgrab may be used to collect statistics on systems other than Linux
136 and/or Solaris. Note that CPU- and disk-statistics, while being provided by
137 this library, are not supported in collectd right now..
138 <http://www.i-scream.org/libstatgrab/>
140 * libcurl (optional)
141 If you want to use the `apache' plugin
143 * CoreFoundation.framework and IOKit.framework
144 For copiling on darwin in general and the `apple_sensors' plugin in
145 particular.
147 Author
148 ------
150 Florian octo Forster <octo at verplant.org>