check_elasticsearch_cluster_status.pl

#!/usr/bin/perl -T
# nagios: -epn
#
#  Author: Hari Sekhon
#  Date: 2013-06-03 21:43:25 +0100 (Mon, 03 Jun 2013) 
#
#  https://github.com/harisekhon/nagios-plugins
#
#  License: see accompanying LICENSE file
#

$DESCRIPTION = "Nagios Plugin to check Elasticsearch cluster status with explanation of green / warning / red state in verbose mode

Optional check on cluster name is included.

Tested on Elasticsearch 0.90.1, 1.2.1, 1.4.0, 1.4.4";

$VERSION = "0.2";

use strict;
use warnings;
BEGIN {
    use File::Basename;
    use lib dirname(__FILE__) . "/lib";
}
use HariSekhonUtils;
use HariSekhon::Elasticsearch;

$ua->agent("Hari Sekhon $progname version $main::VERSION");

my $cluster;

%options = (
    %hostoptions,
    "C|cluster-name=s" => [ \$cluster, "Cluster name to expect (optional). Cluster name is used for auto-discovery and should be unique to each cluster in a single network" ],
);
splice @usage_order, 6, 0, qw/cluster-name/;

get_options();

$host = validate_host($host);
$port = validate_port($port);
$cluster = validate_elasticsearch_cluster($cluster) if defined($cluster);

vlog2;
set_timeout();

$status = "OK";

$json = curl_elasticsearch "/_cluster/health";

my $cluster_name = get_field("cluster_name");
$msg .= "cluster name: '$cluster_name'";
check_string($cluster_name, $cluster);

$msg .= check_elasticsearch_status(get_field("status"));

my $timed_out = get_field("timed_out");
#$timed_out = ( $timed_out ? "true" : "false" );
if($timed_out){
    critical;
    $msg .= ", TIMED OUT: TRUE";
    #check_string($timed_out, "false");
}

vlog2;
quit $status, $msg;