COLLECTDCTL(1) collectd COLLECTDCTL(1)NAMEcollectdctl - Control interface for collectd
SYNOPSIScollectdctl [options] <command> [command options]
DESCRIPTIONcollectdctl provides a control interface for collectd, which may be
used to interact with the daemon using the "unixsock plugin".
OPTIONScollectdctl supports the following options:
-s socket
Path to the UNIX socket opened by collectd's "unixsock plugin".
Default: /var/run/collectd-unixsock
-h Display usage information and exit.
AVAILABLE COMMANDS
The following commands are supported:
getval <identifier>
Query the latest collected value identified by the specified
<identifier> (see below). The value-list associated with that data-
set is returned as a list of key-value-pairs, each on its own line.
Keys and values are separated by the equal sign ("=").
flush [timeout=<seconds>] [plugin=<name>] [identifier=<id>]
Flush the daemon. This is useful, e. g., to make sure that the
latest values have been written to the respective RRD file before
graphing them or copying them to somewhere else.
The following options are supported by the flush command:
timeout=<seconds>
Flush values older than the specified timeout (in seconds)
only.
plugin=<name>
Flush the specified plugin only. I. e., data cached by the
specified plugin is written to disk (or network or whatever),
if the plugin supports that operation.
Example: rrdtool.
identifier=<id>
If this option is present, only the data specified by the
specified identifier (see below) will be flushed. Note that
this option is not supported by all plugins (e. g., the
"network" plugin does not support this).
The plugin and identifier options may be specified more than once.
In that case, all combinations of specified plugins and identifiers
will be flushed only.
listval
Returns a list of all values (by their identifier) available to the
"unixsock" plugin. Each value is printed on its own line. I. e.,
this command returns a list of valid identifiers that may be used
with the other commands.
putval <identifier> [interval=<seconds>] <value-list(s)>
Submit one or more values (identified by <identifier>, see below)
to the daemon which will then dispatch them to the write plugins.
interval specifies the interval (in seconds) used to collect the
values following that option. It defaults to the default of the
running collectd instance receiving the data. Multiple
<value-list(s)> (see below) may be specified. Each of them will be
submitted to the daemon. The values have to match the data-set
definition specified by the type as given in the identifier (see
types.db(5) for details).
IDENTIFIERS
An identifier has the following format:
[hostname/]plugin[-plugin_instance]/type[-type_instance]
Examples:
somehost/cpu-0/cpu-idle
uptime/uptime
otherhost/memory/memory-used
Hostname defaults to the local (non-fully qualified) hostname if
omitted. No error is returned if the specified identifier does not
exist (this is a limitation in the "libcollectdclient" library).
VALUE-LIST
A value list describes one data-set as handled by collectd. It is a
colon (":") separated list of the time and the values. Each value is
either given as an integer if the data-type is a counter, or as a
double if the data-type is a gauge value. A literal "U" is interpreted
as an undefined gauge value. The number of values and the data-types
have to match the type specified in the identifier (see types.db(5) for
details). The time is specified as epoch (i. e., standard UNIX time) or
as a literal "N" which will be interpreted as now.
EXAMPLES
"collectdctl flush plugin=rrdtool identifier=somehost/cpu-0/cpu-wait"
Flushes all CPU wait RRD values of the first CPU of the local host.
I. e., writes all pending RRD updates of that data-source to disk.
"for ident in `collectdctl listval | grep users/users`; do collectdctl
getval $ident; done"
Query the latest number of logged in users on all hosts known to
the local collectd instance.
SEE ALSOcollectd(1), collectd.conf(5), collectd-unixsock(5), types.db(5)AUTHOR
collectd has been written by Florian Forster <octo at verplant.org> and
many contributors (see `AUTHORS').
collectdctl has been written by HXkon J Dugstad Johnsen
<hakon-dugstad.johnsen at telenor.com> and Sebastian Harl <sh at
tokkee.org>.
5.4.1 2014-01-26 COLLECTDCTL(1)
