add perl redis extend

snmp/redis.pl

@@ -0,0 +1,120 @@
+#!/usr/bin/env perl
+
+=head1 NAME
+
+redis.pl - LinbreNMS JSON extend for redis.
+
+=head1 SYNOPSIS
+
+logsize [B<-B>]
+
+=head1 SWITCHES
+
+=head2 -B
+
+Do not the return output via GZip+Base64.
+
+=head2 -h|--help
+
+Print help info.
+
+=head2 -v|--version
+
+Print version info.
+
+=head1 SETUP
+
+Install the depends.
+
+    # FreeBSD
+    pkg install p5-JSON p5-TOML p5-MIME-Base64
+    # Debian
+    apt-get install libjson-perl libmime-base64-perl
+
+Create the cache dir, by default "/var/cache/".
+
+Then set it up in SNMPD.
+
+    # if running it via cron
+    extend redis /usr/local/etc/snmp/redis.pl
+
+=cut
+
+use warnings;
+use strict;
+use JSON;
+use Getopt::Std;
+use MIME::Base64;
+use IO::Compress::Gzip qw(gzip $GzipError);
+use File::Slurp;
+use Pod::Usage;
+
+$Getopt::Std::STANDARD_HELP_VERSION = 1;
+
+sub main::VERSION_MESSAGE {
+	print "LibreNMS redis extend 0.0.1\n";
+}
+
+sub main::HELP_MESSAGE {
+	pod2usage( -exitval => 255, -verbose => 2, -output => \*STDOUT, );
+}
+
+my $return_json = {
+	error       => 0,
+	errorString => '',
+	version     => 1,
+	data        => {},
+};
+
+#gets the options
+my %opts = ();
+getopts( 'Bhv', \%opts );
+
+if ( $opts{v} ) {
+	main::VERSION_MESSAGE;
+	exit 256;
+}
+
+if ( $opts{h} ) {
+	main::VERSION_MESSAGE;
+	pod2usage( -exitval => 255, -verbose => 2, -output => \*STDOUT, );
+	exit 256;
+}
+
+# ensure that $ENV{PATH} has has it
+$ENV{PATH} = $ENV{PATH} . ':/usr/bin:/usr/sbin:/usr/local/sbin:/usr/local/bin';
+
+my $output_raw = `redis-cli info 2> /dev/null`;
+if ( $? != 0 ) {
+	$return_json->{error} = 1;
+	$return_json->{error} = 'redis-cli info exited non-zero';
+	print encode_json($return_json) . "\n";
+}
+
+$output_raw =~ s/\r//g;
+my $section;
+foreach my $line ( split( /\n/, $output_raw ) ) {
+	if ( $line ne '' && $line =~ /^# / ) {
+		$line =~ s/^# //;
+		$section = $line;
+		$return_json->{data}{$section} = {};
+	} elsif ( $line ne '' && defined($section) ) {
+		my ( $key, $value ) = split( /\:/, $line );
+		if ( defined($key) && defined($value) ) {
+			$return_json->{data}{$section}{$key} = $value;
+		}
+	}
+} ## end foreach my $line ( split( /\n/, $output_raw ) )
+
+my $return_json_raw = encode_json($return_json);
+if ( $opts{B} ) {
+	print $return_json_raw. "\n";
+	exit 0;
+}
+
+my $toReturnCompressed;
+gzip \$return_json_raw => \$toReturnCompressed;
+my $compressed = encode_base64($toReturnCompressed);
+$compressed =~ s/\n//g;
+$compressed = $compressed . "\n";
+print $compressed;