contrib/collectd2html.pl: Allow generation of graphs from remote hosts or in an alter...

In the contribs area of the package there is a nice collectd2html.pl script
which assumes that the data is present in /var/lib/collectd and infers the
hostname. All fine and dandy, but there is no way to override this. This is
useful if one generates the data on a machine, but generates the graphs on
another one.

With the attached patch now is possible to specify a different host and/or a
different directory for the data.

The added options are '--host-is' and '--data-dir'.

An invocation for a remote host whose rrd files have been placed in
/var/tmp/collectd-remoteh looks like:
 collectd2html.pl --host-is=remoteh --data-dir=/var/tmp/collectd-remoteh

diff --git a/contrib/collectd2html.pl b/contrib/collectd2html.pl
index 6ff1c47..a4cfe3a 100644 (file)
--- a/contrib/collectd2html.pl
+++ b/contrib/collectd2html.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/perl -w
 
 ################################################################################
 #
@@ -36,12 +36,20 @@ use warnings;
 use strict;
 use Fatal qw(open close);
 use File::Basename;
+use Getopt::Long qw(:config no_ignore_case bundling pass_through);
+
+my $DIR  = "/var/lib/collectd";
+my $HOST = "_UNDEFINED_";
+
+GetOptions (
+    "host-is=s"  => \$HOST,
+    "data-dir=s" => \$DIR
+);
 
-my $DIR = "/var/lib/collectd";
 my @COLORS = (0xff7777, 0x7777ff, 0x55ff55, 0xffcc77, 0xff77ff, 0x77ffff,
        0xffff77, 0x55aaff);
 my @tmp = `/bin/hostname`; chomp(@tmp);
-my $HOST = $tmp[0];
+$HOST = $tmp[0] if ( $HOST =~ /_UNDEFINED_/ );
 my $IMG_DIR = "${HOST}.dir";
 my $HTML = "${HOST}.html";