Nagios::StatusLog3pm

Overview

Reads the Nagios status log and returns ::Status objects that can be used to get status information about a host. For Nagios version 2.x logs, pass in the Version => 2.0 parameter to new(). And similarly, pass in the Version => 3.0 parameter to new() for Nagios version 3.x logs.

 my $log = Nagios::StatusLog->new(
                Filename => "/var/opt/nagios/status.log",
                Version  => 1.0
           );
 $localhost = $log->host( "localhost" );
 print "status of localhost is now ",$localhost->status(),"\n";
 $log->update();
 print "status of localhost is now ",$localhost->status(),"\n";
 # for Nagios v2.0
 my $log = Nagios::StatusLog->new(
                Filename => "/var/cache/nagios2/status.dat",
                Version  => 2.0
           );
 # for Nagios v3.0
 my $log = Nagios::StatusLog->new(
                Filename => "/var/cache/nagios3/status.dat",
                Version  => 3.0
           );

Methods

new()

Create a new Nagios::StatusLog instance. The object will be initialized for you (using $self->update()).
Nagios::StatusLog->new( "/var/opt/nagios/status.log" );

update()

Updates the internal data structures from the logfile.
$log->update();

service()

Returns a Nagios::Service::Status object. Input arguments can be a host_name and description list, or a Nagios::Service object.

 my $svc_stat = $log->service( "localhost", "SSH" );
 my $svc_stat = $log->service( $localhost_ssh_svc_object );

Nagios::Service::Status has the following accessor methods (For V1):
host_name
description
status
current_attempt
state_type
last_check next_check
check_type
checks_enabled
accept_passive_service_checks
event_handler_enabled
last_state_change
problem_has_been_acknowledged
last_hard_state
time_ok
current_notification_number
time_warning
time_critical
process_performance_data
notifications_enabled
latency
scheduled_downtime_depth
is_flapping
plugin_output
percent_state_change
execution_time
time_unknown
failure_prediction_enabled
last_notification
obsess_over_service
flap_detection_enabled

list_services()

Returns an array of all service descriptions in the status log. Services that may be listed on more than one host are only listed once here.

 my @all_services = $log->list_services;

list_services_on_host()

Returns an array of services descriptions for a given host.

 my @host_services = $log->list_services_on_host($hostname);
 my @host_services = $log->list_services_on_host($nagios_object);

serviceproblems()

Returns a hash of all services that are not in an OK state

 my %serviceproblems = $log->serviceproblems();

host()

Returns a Nagios::Host::Status object. Input can be a simple host_name, a Nagios::Host object, or a Nagios::Service object.

 my $hst_stat = $log->host( 'localhost' );
 my $hst_stat = $log->host( $host_object );
 my $hst_stat = $log->host( $svc_object );

Nagios::Host::Status has the following accessor methods (for V1):
host_name
status
last_check
last_state_change
problem_has_been_acknowledged
time_up
time_down
time_unreachable
last_notification
current_notification_number
notifications_enabled
event_handler_enabled
checks_enabled
flap_detection_enabled
is_flapping
percent_state_change
scheduled_downtime_depth
failure_prediction_enabled
process_performance_data
plugin_output

list_hosts()

Returns a simple array of host names (no objects).

 my @hosts = $log->list_hosts;

list_hostdowntime()

Returns a simple array of host downtimes (no objects)

 my @hostdowntimes = $log->list_hostdowntime;

info() [Nagios v2 & v3 logs only]

Returns a Nagios::Info::Status object. It only has two methods, created() and version().

 my $i = $log->info;
 printf "Logfile created at %s unix epoch time for Nagios verion %s\n",
    $i->created,
    $i->version;

contact() [Nagios v3 logs only]

Returns a Nagios::Contact::Status object. Input can be a simple contact_name, or a Nagios::Contact object.

 my $c = $log->contact( 'john' );
 my $c = $log->contact( $contact_object );

Nagios::Contact::Status has the following accessor methods (for v3):
contact_name
modified_attributes
modified_host_attributes
modified_service_attributes
host_notification_period
service_notification_period
last_host_notification
last_service_notification
host_notifications_enabled
service_notifications_enabled

hostcomment() [Nagios v3 logs only]

Returns a Nagios::Hostcomment::Status object. Input can be a simple host_name, or a Nagios::Host or Nagios::Service object.

 my $c = $log->hostcomment( 'localhost' );
 my $c = $log->hostcomment( $localhost_object );
 my $c = $log->hostcomment( $localhost_service_object );
 foreach my $id (sort keys %$c) {
     printf "Host %s has a comment[$id] made by %s on %s: %s",
       $c->{$id}->host_name, $c->{$id}->author, scalar localtime $c->{$id}->entry_time, $c->{$id}->comment_data;
 }

Nagios::Hostcomment::Status is a perl HASH, keyed with the Nagios comment IDs, where each ID has the following accessor methods (for v3):
host_name
entry_type
comment_id
source
persistent
entry_time
expires
expire_time
author
comment_data

servicecomment() [Nagios v3 logs only]

Returns a Nagios::Servicecomment::Status object. Input can be a simple host_name or Nagios::Host object with a service description or Nagios::Service object, or just a Nagios::Service object by itself.

 my $c = $log->servicecomment( 'localhost', 'SSH' );
 my $c = $log->servicecomment( $localhost_object, $localhost_ssh_svc_object );
 my $c = $log->servicecomment( $localhost_ssh_svc_object );
 foreach my $id (sort keys %$c) {
     printf "Service %s on %s  has a comment[$id] made by %s on %s: %s",
       $c->{$id}->service_description, $c->{$id}->host_name, $c->{$id}->author, scalar localtime $c->{$id}->entry_time, $c->{$id}->comment_data;
 }

Nagios::Servicecomment::Status is a perl HASH, keyed with the Nagios comment IDs, where each ID has the following accessor methods (for v3):
host_name
service_description
entry_type
comment_id
source
persistent
entry_time
expires
expire_time
author
comment_data

hostdowntime() [Nagios v3 logs only]

Returns a Nagios::Hostdowntime::Status object. Input can be a simple host_name, or a Nagios::Host or Nagios::Service object.

 my $d = $log->hostdowntime( 'localhost' );
 my $d = $log->hostdowntime( $localhost_object );
 my $d = $log->hostdowntime( $localhost_service_object );
 foreach my $id (sort keys %$d) {
     printf "Host %s has scheduled downtime[$id] made by %s on %s for %.1f hours [%s - %s]: %s",
       $d->{$id}->host_name, $d->{$id}->author, scalar localtime $d->{$id}->entry_time, ($d->{$id}->duration)/3600.0,
         scalar localtime $d->{$id}->start_time, scalar localtime $d->{$id}->end_time, $d->{$id}->comment;
 }

Nagios::Hostdowntime::Status is a perl HASH, keyed with the Nagios downtime IDs, where each ID has the following accessor methods (for v3):
host_name
downtime_id
entry_time
start_time
end_time
triggered_by
fixed
duration
author
comment

servicedowntime() [Nagios v3 logs only]

Returns a Nagios::Servicedowntime::Status object. Input can be a simple host_name or Nagios::Host object with a service description or Nagios::Service object, or just a Nagios::Service object by itself.

 my $c = $log->servicedowntime( 'localhost', 'SSH' );
 my $c = $log->servicedowntime( $localhost_object, $localhost_ssh_svc_object );
 my $c = $log->servicedowntime( $localhost_ssh_svc_object );
 foreach my $id (sort keys %$d) {
     printf "Service %s on %s has scheduled downtime[$id] made by %s on %s for %.1f hours [%s - %s]: %s",
       $d->{$id}->service_description, $d->{$id}->host_name, $d->{$id}->author, scalar localtime $d->{$id}->entry_time, ($d->{$id}->duration)/3600.0,
         scalar localtime $d->{$id}->start_time, scalar localtime $d->{$id}->end_time, $d->{$id}->comment;
 }

Nagios::Servicedowntime::Status is a perl HASH, keyed with the Nagios downtime IDs, where each ID has the following accessor methods (for v3):
host_name
service_description
downtime_id
entry_time
start_time
end_time
triggered_by
fixed
duration
author
comment

program()

Returns a Nagios::Program::Status object. No arguments.

 my $prog_st = $log->program;

Nagios::Program::Status has the following accessor methods (For V1):
program_start
nagios_pid
daemon_mode
last_command_check
last_log_rotation
enable_notifications
execute_service_checks
accept_passive_service_checks
enable_event_handlers
obsess_over_services
enable_flap_detection
enable_failure_prediction
process_performance_data

Structure

This module contains 4 packages: Nagios::StatusLog, Nagios::Host::Status, Nagios::Service::Status, and Nagios::Program::Status. The latter 3 of them are mostly generated at compile-time in the BEGIN block. The accessor methods are real subroutines, not AUTOLOAD, so making a ton of calls to this module should be fairly quick. Also, update() is set up to only do what it says - updating from a fresh logfile should not invalidate your existing ::Status objects.