NAME

Collectd::Unixsock - Abstraction layer for accessing the functionality by collectd's unixsock plugin.

SYNOPSIS

  use Collectd::Unixsock;
  my $sock = Collectd::Unixsock->new ($path);
  my $value = $sock->getval (%identifier);
  $sock->putval (%identifier,
                 time => time (),
                 values => [123, 234, 345]);
  $sock->destroy ();

DESCRIPTION

collectd's unixsock plugin allows external programs to access the values it has collected or received and to submit own values. This Perl-module is simply a little abstraction layer over this interface to make it even easier for programmers to interact with the daemon.

VALUE IDENTIFIERS

The values in the collectd are identified using a five-tuple (host, plugin, plugin-instance, type, type-instance) where only plugin instance and type instance may be undef. Many functions expect an %identifier hash that has at least the members host, plugin, and type, possibly completed by plugin_instance and type_instance.

Usually you can pass this hash as follows:

  $self->method (host => $host, plugin => $plugin, type => $type, %other_args);

PUBLIC METHODS

$self = Collectd::Unixsock->new ([$path]);

Creates a new connection to the daemon. The optional $path argument gives the path to the UNIX socket of the "unixsock plugin" and defaults to /var/run/collectd-unixsock. Returns the newly created object on success and false on error.

$res = $self->getval (%identifier);

Requests a value-list from the daemon. On success a hash-ref is returned with the name of each data-source as the key and the according value as, well, the value. On error false is returned.

$res = $self->getthreshold (%identifier);

Requests a threshold from the daemon. On success a hash-ref is returned with the threshold data. On error false is returned.

$self->putval (%identifier, time => $time, values => [...]);

Submits a value-list to the daemon. If the time argument is omitted "time()" is used. The required argument values is a reference to an array of values that is to be submitted. The number of values must match the number of values expected for the given type (see "VALUE IDENTIFIERS"), though this is checked by the daemon, not the Perl module. Also, gauge data-sources (e. g. system-load) may be "undef". Returns true upon success and false otherwise.

$res = $self->listval_filter ( %identifier )

Queries a list of values from the daemon while restricting the results to certain hosts, plugins etc. The argument may be anything that passes for an identifier (cf. "VALUE IDENTIFIERS"), although all fields are optional. The returned data is in the same format as from "listval".

$res = $self->listval ()

Queries a list of values from the daemon. The list is returned as an array of hash references, where each hash reference is a valid identifier. The "time" member of each hash holds the epoch value of the last update of that value.

$res = $self->putnotif (severity => $severity, message => $message, ...);

Submits a notification to the daemon.

Valid options are:

$self->flush (timeout => $timeout, plugins => [...], identifier => [...]);

Flush cached data.

Valid options are:

$self->destroy ();

Closes the socket before the object is destroyed. This function is also automatically called then the object goes out of scope.

SEE ALSO

collectd(1), collectd.conf(5), collectd-unixsock(5)

AUTHOR

Florian octo Forster <octo@collectd.org>