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https://github.com/munin-monitoring/contrib.git
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113 lines
2.7 KiB
Perl
Executable file
113 lines
2.7 KiB
Perl
Executable file
#!/usr/bin/env perl
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# Parameters supported:
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#
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# config
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# autoconf
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#
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# Magic markers:
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#%# family=auto
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#%# capabilities=autoconf
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use strict;
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use warnings;
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use LWP;
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use JSON qw/decode_json/;
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=head1 NAME
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elasticsearch_open_files - A munin plugin that collects the number of open files in your elasticsearch instances
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=head1 APPLICABLE SYSTEMS
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Elasticsearch
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=head1 CONFIGURATION
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None
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=head1 BUGS
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None known so far. If you find any, let me know.
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=head1 AUTHOR
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Kentaro Yoshida - https://github.com/y-ken
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Rowan Wookey - https://www.rwky.net
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=head1 LICENSE
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MIT
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=cut
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my $url = exists $ENV{'url'} ? $ENV{'url'} : 'http://localhost:9200';
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my $ua = LWP::UserAgent->new;
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$ua->timeout(10);
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sub autoconf {
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my $res = $ua->get( $url, 'Content-Type' => 'application/json' );
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my $data = do {
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local $@;
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eval { decode_json( $res->content ) }
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};
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if ( $data->{version}->{number} ) {
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print("yes\n");
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}
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else {
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print("no\n");
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}
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exit(0);
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}
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if ( $ARGV[0] and $ARGV[0] eq 'autoconf' ) {
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autoconf();
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}
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sub get_json_from_url {
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my $uri = shift;
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my $res = $ua->get( $url . $uri, 'Content-Type' => 'application/json' );
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Carp::confess( $res->code . " for " . $uri ) unless $res->is_success;
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my $data = do {
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local $@;
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eval { decode_json( $res->content ) }
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};
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die( "Could not decode JSON from: " . $res->content ) unless $data;
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return $data;
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}
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sub collect_max_file_descriptors {
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my $data = get_json_from_url("/_nodes/_local/stats/process");
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foreach my $full_node_name ( keys %{ $data->{nodes} } ) {
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return $data->{nodes}{$full_node_name}{process}{max_file_descriptors};
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}
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}
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sub collect_open_file_descriptors {
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my $data = get_json_from_url("/_nodes/_local/stats/process");
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foreach my $full_node_name ( keys %{ $data->{nodes} } ) {
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return $data->{nodes}{$full_node_name}{process}{open_file_descriptors};
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}
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}
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my %out = (
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max_file_descriptors => collect_max_file_descriptors,
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open_file_descriptors => collect_open_file_descriptors
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);
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if ( $ARGV[0] and $ARGV[0] eq 'config' ) {
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print "graph_title Elasticsearch open files\n";
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print "graph_args --base 1000 -l 0\n";
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print "graph_vlabel number of open files\n";
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print "graph_category elasticsearch\n";
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print "open_file_descriptors.label open files\n";
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print "open_file_descriptors.type GAUGE\n";
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print "open_file_descriptors.info The number of currently open files.\n";
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print "max_file_descriptors.label max open files\n";
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print "max_file_descriptors.type GAUGE\n";
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}
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else {
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print "max_file_descriptors.value $out{max_file_descriptors}\n";
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print "open_file_descriptors.value $out{open_file_descriptors}\n";
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}
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