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Using external commands in Nagios
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Nagios::Object(3pm) User Contributed Perl Documentation Nagios::Object(3pm) NAME
Nagios::Object - Creates perl objects to represent Nagios objects DESCRIPTION
This module contains the code for creating perl objects to represent any of the Nagios objects. All of the perl classes are auto-generated at compile-time, so it's pretty trivial to add new attributes or even entire objects. The following is a list of currently supported classes: Nagios::TimePeriod Nagios::Command Nagios::Contact Nagios::ContactGroup Nagios::Host Nagios::Service Nagios::HostGroup Nagios::ServiceEscalation Nagios::HostDependency Nagios::HostEscalation Nagios::HostGroupEscalation Nagios::ServiceDependency -- next two are for status.dat in Nagios 2.x Nagios::Info Nagios::Program EXAMPLE
use Nagios::Object; my $generic_host = Nagios::Host->new( register => 0, parents => undef, check_command => $some_command, max_check_attempts => 3, checks_enabled => 1, event_handler => $some_command, event_handler_enabled => 0, low_flap_threshold => 0, high_flap_threshold => 0, flap_detection_enabled => 0, process_perf_data => 1, retain_status_information => 1, retain_nonstatus_information => 1, notification_interval => $timeperiod, notification_options => [qw(d u r)], notifications_enabled => 1, stalking_options => [qw(o d u)] ); # this will automatically 'use' $generic_host my $localhost = $generic_host->new( host_name => "localhost", alias => "Loopback", address => "127.0.0.1" ); my $hostname = $localhost->host_name(); printf "max check attempts for $hostname is %s. ", $localhost->max_check_attempts; $localhost->set_event_handler( Nagios::Command->new( command_name => "new_event_handler", command_line => "/bin/true" ) ); METHODS
new() Create a new object of one of the types listed above. Calling new() on an existing object will use the LHS object as the template for the object being created. This is mainly useful for creating objects without involving Nagios::Object::Config (like in the test suite). Nagios::Host->new( ... ); dump() Output a Nagios define { } block from an object. This is still EXPERIMENTAL, but may eventually be robust enough to use for a configuration GUI. Passing in a single true argument will tell it to flatten the object inheritance on dump. print $object->dump(); print $object->dump(1); # flatten name() This method is common to all classes created by this module. It should always return the textual name for an object. It is used internally by the Nagios::Object modules to allow polymorphism (which is what makes this module so compact). This is the only way to retrieve the name of a template, since they are identified by their "name" field. my $svc_desc = $service->name; my $hostname = $host->name; Which is just short for: my $svc_desc = $service->service_description; my $hostname = $service->host_name; register() Returns true/undef to indicate whether the calling object is registerable or not. if ( $object->register ) { print $object->name, " is registerable." } has_attribute() Returns true/undef to indicate whether the calling object has the attribute specified as the only argument. # check to see if $object has attribute "command_line" die if ( !$object->has_attribute("command_line") ); list_attributes() Returns a list of valid attributes for the calling object. my @host_attributes = $host->list_attributes(); attribute_type() Returns the type of data expected by the object's set_ method for the given attribute. For some fields like notification_options, it may return "char_flag." For "name" attributes, it will simply return whatever %setup_data contains. This method needs some TLC ... my $type = $host->attribute_type("notification_period"); attribute_is_list() Returns true if the attribute is supposed to be a list (ARRAYREF). if ( $object->attribute_is_list("members") ) { $object->set_members( [$member] ); } else { $object->set_members( $member ); } AUTHOR
Al Tobey <tobeya@cpan.org> Thank you to the fine people of #perl on freenode.net for helping me with some hairy code and silly optimizations. WARNINGS
See AUTHOR. perl v5.12.4 2011-10-22 Nagios::Object(3pm)
