Sending Data from external script to an RRD - can't see graphs - only links

5 messages in this thread

list Javier Temponi · Mon, 24 Sep 2007 16:13:31 +1000 ·

Hello, I want to graph the load information of my routers interfaces, I
have been reading for several days the list, and I have learned a lot
but not enough yet to make this works :-)...

 
This is the situation: I receive the information from devmon, and
execute an external script to write the rrd file. The files are written
but I can not see them from the hobbit page.

I have the rrd files generated and updated but in the hobbit page I only
can see the links and no graph (not an empty or blank graph, only the
little box with the name of the link inside).

 
I'm using devmon 0.3.0-beta2 and hobbit 4.2 with the patch all in one
installed.

OS: Linux kernel 2.6.9

 
Other graphs work fine, the default ones, for example the Conn graph.

The information from devmon is received ok by hobbit, because I have a
table with the load of the interfaces that devmon sent.

 
These are the configuration files:

 
hobbitserver.cfg (to see the graphs in the load and trends columns):

 
TEST2RRD=".....,if_load=ncv"

NCV_if_load="in:GAUGE,out:GAUGE"

 
GRAPHS="......,if_load"

 
hobbitlaunch.cfg 

 
[rrdstatus]

        ENVFILE /usr/local/hobbit/server/etc/hobbitserver.cfg

        NEEDS hobbitd

        CMD hobbitd_channel --channel=status
--log=$BBSERVERLOGS/rrd-status.log hobbitd_rrd --rrddir=$BBVAR/rrd
--extra-script=$BBHOME/ext/extra-rrd.pl --debug --extra-tests=if_load

 
This is the script  ext/extra-rrd.pl

 
#!/usr/bin/perl

 
# Input parameters: Hostname, testname (column), and messagefile

#$HOSTNAME=$ARGV[0]; ;

$TESTNAME=$ARGV[1]; ;

$FNAME=$ARGV[2]; ;

$filename="/tmp/if_log";

 
# Read the entire files

open (FILEHANDLE,$FNAME) || die (print "cant read file\n");

@input = <FILEHANDLE>;

close (FILEHANDLE);

 
if ( $TESTNAME eq "if_load" ) {

 
        # Analyze the message we got

        foreach $line (@input) {

                if ($line =~ /(^[A-Z].*) (\d+):(\d+)$/ ) {

 
                        # The RRD dataset definitions

                        print "DS:in:DERIVE:600:0:U\n";

                        print "DS:out:DERIVE:600:0:U\n";

 
                        # The filename

                        print "if_load_$1.rrd\n";

 
                        # The data

                        print "$2:$3\n";

                }

        }

}

 
hobbitgraph.cfg file :

 
[if_load]

        FNPATTERN if_load(.*).rrd

        TITLE Network Traffic

        YAXIS Bits/second

        DEF:in (at) RRDIDX@= (at) RRDFN@:in:AVERAGE

        CDEF:inbytes (at) RRDIDX@=in (at) RRDIDX@,8,*

        DEF:out (at) RRDIDX@= (at) RRDFN@:out:AVERAGE

        CDEF:outbytes (at) RRDIDX@=out (at) RRDIDX@,8,*

        LINE1:inbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ In

        GPRINT:inbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)

        GPRINT:inbytes (at) RRDIDX@:MAX: %8.2lf %s (max)

        GPRINT:inbytes (at) RRDIDX@:MIN: %8.2lf %s (min)

        GPRINT:inbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n

        LINE1:outbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ Out

        GPRINT:outbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)

        GPRINT:outbytes (at) RRDIDX@:MAX: %8.2lf %s (max)

        GPRINT:outbytes (at) RRDIDX@:MIN: %8.2lf %s (avg)

        GPRINT:outbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n

 
If anyone has any idea, where the problem could be or any work around
I'll really appreciate.

 
Thanks in advance

Javier

list Johann Eggers · Mon, 24 Sep 2007 10:38:03 +0200 ·

 

From: Javier Temponi [mailto:user-c91e32d5690d@xymon.invalid] 
Sent: Montag, 24. September 2007 08:14
To: user-ae9b8668bcde@xymon.invalid
Subject: [hobbit] Sending Data from external script to an RRD - can't
see graphs - only links

▸ quoted from Javier Temponi


 
Hello, I want to graph the load information of my routers interfaces, I
have been reading for several days the list, and I have learned a lot
but not enough yet to make this works :-)...

 
This is the situation: I receive the information from devmon, and
execute an external script to write the rrd file. The files are written
but I can not see them from the hobbit page.

I have the rrd files generated and updated but in the hobbit page I only
can see the links and no graph (not an empty or blank graph, only the
little box with the name of the link inside).

 
I'm using devmon 0.3.0-beta2 and hobbit 4.2 with the patch all in one
installed.

OS: Linux kernel 2.6.9

 
Other graphs work fine, the default ones, for example the Conn graph.

The information from devmon is received ok by hobbit, because I have a
table with the load of the interfaces that devmon sent.

 
These are the configuration files:

 
hobbitserver.cfg (to see the graphs in the load and trends columns):

 
TEST2RRD=".....,if_load=ncv"

NCV_if_load="in:GAUGE,out:GAUGE"

 
GRAPHS="......,if_load"

 
hobbitlaunch.cfg 

 
[rrdstatus]

        ENVFILE /usr/local/hobbit/server/etc/hobbitserver.cfg

        NEEDS hobbitd

        CMD hobbitd_channel --channel=status
--log=$BBSERVERLOGS/rrd-status.log hobbitd_rrd --rrddir=$BBVAR/rrd
--extra-script=$BBHOME/ext/extra-rrd.pl --debug --extra-tests=if_load

 
This is the script  ext/extra-rrd.pl

 
#!/usr/bin/perl

 
# Input parameters: Hostname, testname (column), and messagefile

#$HOSTNAME=$ARGV[0]; ;

$TESTNAME=$ARGV[1]; ;

$FNAME=$ARGV[2]; ;

$filename="/tmp/if_log";

 
# Read the entire files

open (FILEHANDLE,$FNAME) || die (print "cant read file\n");

@input = <FILEHANDLE>;

close (FILEHANDLE);

 
if ( $TESTNAME eq "if_load" ) {

 
        # Analyze the message we got

        foreach $line (@input) {

                if ($line =~ /(^[A-Z].*) (\d+):(\d+)$/ ) {

 
                        # The RRD dataset definitions

                        print "DS:in:DERIVE:600:0:U\n";

                        print "DS:out:DERIVE:600:0:U\n";

 
                        # The filename

                        print "if_load_$1.rrd\n";

 
                        # The data

                        print "$2:$3\n";

                }

        }

}

 
hobbitgraph.cfg file :

 
[if_load]

        FNPATTERN if_load(.*).rrd

        TITLE Network Traffic

        YAXIS Bits/second

        DEF:in (at) RRDIDX@= (at) RRDFN@:in:AVERAGE

        CDEF:inbytes (at) RRDIDX@=in (at) RRDIDX@,8,*

        DEF:out (at) RRDIDX@= (at) RRDFN@:out:AVERAGE

        CDEF:outbytes (at) RRDIDX@=out (at) RRDIDX@,8,*

        LINE1:inbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ In

        GPRINT:inbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)

        GPRINT:inbytes (at) RRDIDX@:MAX: %8.2lf %s (max)

        GPRINT:inbytes (at) RRDIDX@:MIN: %8.2lf %s (min)

        GPRINT:inbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n

        LINE1:outbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ Out

        GPRINT:outbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)

        GPRINT:outbytes (at) RRDIDX@:MAX: %8.2lf %s (max)

        GPRINT:outbytes (at) RRDIDX@:MIN: %8.2lf %s (avg)

        GPRINT:outbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n

 
If anyone has any idea, where the problem could be or any work around


I'll really appreciat

list Johann Eggers · Mon, 24 Sep 2007 10:46:58 +0200 ·

▸ quoted from Johann Eggers

hobbitgraph.cfg file :

[if_load]
        FNPATTERN if_load(.*).rrd
        TITLE Network Traffic
        YAXIS Bits/second
        DEF:in (at) RRDIDX@= (at) RRDFN@:in:AVERAGE
        CDEF:inbytes (at) RRDIDX@=in (at) RRDIDX@,8,*
        DEF:out (at) RRDIDX@= (at) RRDFN@:out:AVERAGE
        CDEF:outbytes (at) RRDIDX@=out (at) RRDIDX@,8,*
        LINE1:inbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ In
        GPRINT:inbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)
        GPRINT:inbytes (at) RRDIDX@:MAX: %8.2lf %s (max)
        GPRINT:inbytes (at) RRDIDX@:MIN: %8.2lf %s (min)
        GPRINT:inbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n
        LINE1:outbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ Out
        GPRINT:outbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)
        GPRINT:outbytes (at) RRDIDX@:MAX: %8.2lf %s (max)
        GPRINT:outbytes (at) RRDIDX@:MIN: %8.2lf %s (avg)
        GPRINT:outbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n


If anyone has any idea, where the problem could be or any work around I'll > really appreciate.

Your graph definition looks a little bit strange:

You should change these (at)'s to the @ sign...

Johann

list Joshua Krause · Mon, 24 Sep 2007 06:07:35 -0400 ·

One thing I see that I made the same mistake at is in your  
hobbitgraph.cfg:

▸ quoted from Johann Eggers


[if_load]
         FNPATTERN if_load(.*).rrd
         TITLE Network Traffic
         YAXIS Bits/second
         DEF:in (at) RRDIDX@= (at) RRDFN@:in:AVERAGE
         CDEF:inbytes (at) RRDIDX@=in (at) RRDIDX@,8,*
         DEF:out (at) RRDIDX@= (at) RRDFN@:out:AVERAGE
         CDEF:outbytes (at) RRDIDX@=out (at) RRDIDX@,8,*
         LINE1:inbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ In
         GPRINT:inbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)
         GPRINT:inbytes (at) RRDIDX@:MAX: %8.2lf %s (max)
         GPRINT:inbytes (at) RRDIDX@:MIN: %8.2lf %s (min)
         GPRINT:inbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n
         LINE1:outbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ Out
         GPRINT:outbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)
         GPRINT:outbytes (at) RRDIDX@:MAX: %8.2lf %s (max)
         GPRINT:outbytes (at) RRDIDX@:MIN: %8.2lf %s (avg)
         GPRINT:outbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n


you need to replace "(at)" with "@", It looks like when the post was  
made it converted all the @ to (at).  But that was my big problem.   
And I am not using the NCV function and don't think it is  to be done  
using that but could be wrong.   And my extra-rrd.pl looks like this:

▸ quoted from Johann Eggers


#!/usr/bin/perl

# Input parameters: Hostname, testname (column), and messagefile
$HOSTNAME=$ARGV[0]; ;
$TESTNAME=$ARGV[1]; ;
$FNAME=$ARGV[2]; ;

# Read the entire files
open (FILEHANDLE,$FNAME) || die ("cant read file\n");
@input = <FILEHANDLE>;
close (FILEHANDLE);

if ( $TESTNAME eq "if_load" ) {

         # Analyze the message we got
         foreach $line (@input) {
                 if ($line =~ /(^[A-Z].*) (\d+):(\d+)$/ ) {

                         # The RRD dataset definitions
                         print "DS:in:DERIVE:600:0:U\n";
                         print "DS:out:DERIVE:600:0:U\n";

                         # The filename
                         print "if_load_$1.rrd\n";

                         # The data
                         print "$2:$3\n";
                 }
         }
}


Hope this helps you out and if you need anymore I will be glad to give  
ya what I know or have found out.

Josh

▸ quoted from Javier Temponi


On Sep 24, 2007, at 2:13 AM, Javier Temponi wrote:

Hello, I want to graph the load information of my routers  
interfaces, I have been reading for several days the list, and I


have learned a lot but not enough yet to make this works J…

▸ quoted from Johann Eggers


This is the situation: I receive the information from devmon, and  
execute an external script to write the rrd file. The files are  
written but I can not see them from the hobbit page.
I have the rrd files generated and updated but in the hobbit page I  
only can see the links and no graph (not an empty or blank graph,  
only the little box with the name of the link inside).

I’m using devmon 0.3.0-beta2 and hobbit 4.2 with the patch all in  
one installed.
OS: Linux kernel 2.6.9

Other graphs work fine, the default ones, for example the Conn graph.
The information from devmon is received ok by hobbit, because I have  
a table with the load of the interfaces that devmon sent.

These are the configuration files:

hobbitserver.cfg (to see the graphs in the load and trends columns):

TEST2RRD="…..,if_load=ncv"
NCV_if_load="in:GAUGE,out:GAUGE"

GRAPHS="……,if_load”

hobbitlaunch.cfg

[rrdstatus]
        ENVFILE /usr/local/hobbit/server/etc/hobbitserver.cfg
        NEEDS hobbitd


        CMD hobbitd_channel --channel=status --log=$BBSERVERLOGS/rrd- 
status.log hobbitd_rrd --rrddir=$BBVAR/rrd --extra-script=$BBHOME/ 
ext/extra-rrd.pl --debug --extra-tests=if_load

▸ quoted from Johann Eggers


This is the script  ext/extra-rrd.pl

#!/usr/bin/perl

# Input parameters: Hostname, testname (column), and messagefile
#$HOSTNAME=$ARGV[0]; ;
$TESTNAME=$ARGV[1]; ;
$FNAME=$ARGV[2]; ;
$filename="/tmp/if_log";

# Read the entire files
open (FILEHANDLE,$FNAME) || die (print "cant read file\n");
@input = <FILEHANDLE>;
close (FILEHANDLE);

if ( $TESTNAME eq "if_load" ) {

        # Analyze the message we got
        foreach $line (@input) {
                if ($line =~ /(^[A-Z].*) (\d+):(\d+)$/ ) {

                        # The RRD dataset definitions
                        print "DS:in:DERIVE:600:0:U\n";
                        print "DS:out:DERIVE:600:0:U\n";

                        # The filename
                        print "if_load_$1.rrd\n";

                        # The data
                        print "$2:$3\n";
                }
        }
}


hobbitgraph.cfg file :

[if_load]
        FNPATTERN if_load(.*).rrd
        TITLE Network Traffic
        YAXIS Bits/second
        DEF:in (at) RRDIDX@= (at) RRDFN@:in:AVERAGE
        CDEF:inbytes (at) RRDIDX@=in (at) RRDIDX@,8,*
        DEF:out (at) RRDIDX@= (at) RRDFN@:out:AVERAGE
        CDEF:outbytes (at) RRDIDX@=out (at) RRDIDX@,8,*
        LINE1:inbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ In
        GPRINT:inbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)
        GPRINT:inbytes (at) RRDIDX@:MAX: %8.2lf %s (max)
        GPRINT:inbytes (at) RRDIDX@:MIN: %8.2lf %s (min)
        GPRINT:inbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n
        LINE1:outbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ Out
        GPRINT:outbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)
        GPRINT:outbytes (at) RRDIDX@:MAX: %8.2lf %s (max)
        GPRINT:outbytes (at) RRDIDX@:MIN: %8.2lf %s (avg)
        GPRINT:outbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n


If anyone has any idea, where the problem could be or any work  
around I’ll really appreciate.

Thanks in advance
Javier

list Javier Temponi · Tue, 25 Sep 2007 17:52:03 +1000 ·

Thanks a lot Josh, the two things that you mentioned in your answer
solved my problem, the change in the hobbitgraph.cfg and add your
extra-rrd.pl script. 

 
After those changes I only had to add in the exception file of the
devmon template, wich interfaces I want to graph and it is working!!!

 
Thanks again for the help

Regards

Javier

▸ quoted from Joshua Krause


 
From: Joshua Krause [mailto:user-f8009a939286@xymon.invalid] 
Sent: Monday, 24 September 2007 8:08 PM
To: user-ae9b8668bcde@xymon.invalid
Subject: Re: [hobbit] Sending Data from external script to an RRD -
can't see graphs - only links

 
One thing I see that I made the same mistake at is in your
hobbitgraph.cfg:

 
[if_load]

        FNPATTERN if_load(.*).rrd

        TITLE Network Traffic

        YAXIS Bits/second

        DEF:in (at) RRDIDX@= (at) RRDFN@:in:AVERAGE

        CDEF:inbytes (at) RRDIDX@=in (at) RRDIDX@,8,*

        DEF:out (at) RRDIDX@= (at) RRDFN@:out:AVERAGE

        CDEF:outbytes (at) RRDIDX@=out (at) RRDIDX@,8,*

        LINE1:inbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ In

        GPRINT:inbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)

        GPRINT:inbytes (at) RRDIDX@:MAX: %8.2lf %s (max)

        GPRINT:inbytes (at) RRDIDX@:MIN: %8.2lf %s (min)

        GPRINT:inbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n

        LINE1:outbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ Out

        GPRINT:outbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)

        GPRINT:outbytes (at) RRDIDX@:MAX: %8.2lf %s (max)

        GPRINT:outbytes (at) RRDIDX@:MIN: %8.2lf %s (avg)

        GPRINT:outbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n

 
you need to replace "(at)" with "@", It looks like when the post was
made it converted all the @ to (at).  But that was my big problem.  And
I am not using the NCV function and don't think it is  to be done using
that but could be wrong.   And my extra-rrd.pl looks like this:

 
#!/usr/bin/perl 

 
# Input parameters: Hostname, testname (column), and messagefile

$HOSTNAME=$ARGV[0]; ;

$TESTNAME=$ARGV[1]; ;

$FNAME=$ARGV[2]; ;

 
# Read the entire files

open (FILEHANDLE,$FNAME) || die ("cant read file\n");

@input = <FILEHANDLE>;

close (FILEHANDLE);

 
if ( $TESTNAME eq "if_load" ) {

 
        # Analyze the message we got

        foreach $line (@input) {

                if ($line =~ /(^[A-Z].*) (\d+):(\d+)$/ ) {

 
                        # The RRD dataset definitions

                        print "DS:in:DERIVE:600:0:U\n";

                        print "DS:out:DERIVE:600:0:U\n";

 
                        # The filename

                        print "if_load_$1.rrd\n";

 
                        # The data

                        print "$2:$3\n";

                }

        }

}

 
Hope this helps you out and if you need anymore I will be glad to give
ya what I know or have found out.

 
Josh

 
On Sep 24, 2007, at 2:13 AM, Javier Temponi wrote:


Hello, I want to graph the load information of my routers interfaces, I
have been reading for several days the list, and I have learned a lot
but not enough yet to make this works :-)...

 
This is the situation: I receive the information from devmon, and
execute an external script to write the rrd file. The files are written
but I can not see them from the hobbit page.

I have the rrd files generated and updated but in the hobbit page I only
can see the links and no graph (not an empty or blank graph, only the
little box with the name of the link inside).

 
I'm using devmon 0.3.0-beta2 and hobbit 4.2 with the patch all in one
installed.

OS: Linux kernel 2.6.9

 
Other graphs work fine, the default ones, for example the Conn graph.

The information from devmon is received ok by hobbit, because I have a
table with the load of the interfaces that devmon sent.

 
These are the configuration files:

 
hobbitserver.cfg (to see the graphs in the load and trends columns):

 
TEST2RRD=".....,if_load=ncv"

NCV_if_load="in:GAUGE,out:GAUGE"

 
GRAPHS="......,if_load"

 
hobbitlaunch.cfg

 
[rrdstatus]

        ENVFILE /usr/local/hobbit/server/etc/hobbitserver.cfg

        NEEDS hobbitd

        CMD hobbitd_channel --channel=status
--log=$BBSERVERLOGS/rrd-status.log hobbitd_rrd --rrddir=$BBVAR/rrd
--extra-script=$BBHOME/ext/extra-rrd.pl --debug --extra-tests=if_load

 
This is the script  ext/extra-rrd.pl

 
#!/usr/bin/perl

 
# Input parameters: Hostname, testname (column), and messagefile

#$HOSTNAME=$ARGV[0]; ;

$TESTNAME=$ARGV[1]; ;

$FNAME=$ARGV[2]; ;

$filename="/tmp/if_log";

 
# Read the entire files

open (FILEHANDLE,$FNAME) || die (print "cant read file\n");

@input = <FILEHANDLE>;

close (FILEHANDLE);

 
if ( $TESTNAME eq "if_load" ) {

 
        # Analyze the message we got

        foreach $line (@input) {

                if ($line =~ /(^[A-Z].*) (\d+):(\d+)$/ ) {

 
                        # The RRD dataset definitions

                        print "DS:in:DERIVE:600:0:U\n";

                        print "DS:out:DERIVE:600:0:U\n";

 
                        # The filename

                        print "if_load_$1.rrd\n";

 
                        # The data

                        print "$2:$3\n";

                }

        }

}

 
hobbitgraph.cfg file :

 
[if_load]

        FNPATTERN if_load(.*).rrd

        TITLE Network Traffic

        YAXIS Bits/second

        DEF:in (at) RRDIDX@= (at) RRDFN@:in:AVERAGE

        CDEF:inbytes (at) RRDIDX@=in (at) RRDIDX@,8,*

        DEF:out (at) RRDIDX@= (at) RRDFN@:out:AVERAGE

        CDEF:outbytes (at) RRDIDX@=out (at) RRDIDX@,8,*

        LINE1:inbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ In

        GPRINT:inbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)

        GPRINT:inbytes (at) RRDIDX@:MAX: %8.2lf %s (max)

        GPRINT:inbytes (at) RRDIDX@:MIN: %8.2lf %s (min)

        GPRINT:inbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n

        LINE1:outbytes (at) RRDIDX@# (at) COLOR@:@RRDPARAM@ Out

        GPRINT:outbytes (at) RRDIDX@:LAST: %8.2lf %s (cur)

        GPRINT:outbytes (at) RRDIDX@:MAX: %8.2lf %s (max)

        GPRINT:outbytes (at) RRDIDX@:MIN: %8.2lf %s (avg)

        GPRINT:outbytes (at) RRDIDX@:AVERAGE: %8.2lf %s (avg)\n

 
If anyone has any idea, where the problem could be or any work around
I'll really appreciate.

 
Thanks in advance

Javier


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Sending Data from external script to an RRD - can't see graphs - only links 🔗 link

Sending Data from external script to an RRD - can't see graphs - only links