[mrtg] Re: MaxBytes changing???

Tue Jul 6 17:50:31 MEST 2004

What I'm actually trying to do use utilize the template option of cfgmaker.
One of the parameters that you can use with cfgmaker is host-template and
if-template, these point to files that have config params that you would see
in the .cfg file. Cfgmaker imports those and uses that as the template for
creating the .cfg for the respective hosts. Here is a copy of my
host-template file:

#
# Memory Usage
#

my $target_name = $router_name . ".memory";

$target_lines .= <<ECHO;

#Target[$target_name]:
1.3.6.1.4.1.311.1.1.3.1.1.1.3.0&1.3.6.1.2.1.25.2.2.0:$router_connect
PageTop[$target_name]: 
 <table width="600" align="center" bgcolor="black" cellspacing=1
cellpadding=0>
 <tr><td>
 <table bgcolor="white" align="center" width="100%" cellspacing=0
cellpadding=0>
 <tr><td bgcolor="navy" align="center" style="color: gold; font-family:
Verdana, Arial; font-size: 18pt; font-weight: bold; border-bottom: thin
solid Black;">
 Server CPU load
 </tr></td><tr><td>
 <TABLE width="100%" align="left" style="color: black; font-family: Verdana,
Arial; font-size: 10pt; font-weight: bold; border-bottom: thin solid
Black;">
  <TR><TD>System:</TD><TD>$router_name in $html_syslocation</TD></TR>
  <TR><TD>Maintainer:</TD><TD>$html_syscontact</TD></TR>
  <TR><TD>Description:</TD><TD>Memory Usage</TD></TR>
  <TR><TD>Resource:</TD><TD>CPU.</TD></TR>
 </TABLE>
PageFoot[$target_name]: </td></tr></table></td></tr></table>
#SetEnv[$target_name]: MRTG_INT_DESCR="$target_name"
Unscaled[$target_name]: dwmy
Background[$target_name]: #c0c0c0
MaxBytes[$target_name]: 1048048000
kMG[$target_name]: ,,M,,
Options[$target_name]: gauge, absolute, unknaszero
YLegend[$target_name]: Memory in Use
ShortLegend[$target_name]: 
WithPeak[$target_name]: wmy
Colours[$target_name]: GREEN#00eb0c,BLUE#0000ff,GRAY#AAAAAA,VIOLET#ff00ff
Legend1[$target_name]: Allocated Memory in Use
Legend2[$target_name]: .
Legend3[$target_name]: .
Legend4[$target_name]: Peak Allocated Memory in Use
LegendI[$target_name]: Mem
LegendO[$target_name]: Mem
Title[$target_name]: $router_name

As you can see I have to enter a number for the MaxBytes. So every machine
is going to base its usage off of 1GB or RAM even though some servers have
more. My question is how can I vary that number using the cfgmaker templates
option?

I know I could write a script that could modify the .cfg files after the
creation but I thought for sure that mrtg would have run into this problem
and would have a solution...

Britt Tabor
I.T. Infrastructure Engineer

-----Original Message-----
From: DANIEL MAGNUSZEWSKI [mailto:dmagnuszewski at mandtbank.com] 
Sent: Tuesday, July 06, 2004 11:20 AM
To: Britt_Tabor at Jabil.com; mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: MaxBytes changing???

Britt,

I'm not sure if I'm understanding you correctly, but it seems to me
that you are looking for a way to make SNMP queries from your html? If
so, you should check out this Perl module:

http://search.cpan.org/~rigbyc/Apache-WebSNMP-0.11/lib/Apache/WebSNMP.pm

Otherwise, I'd say to write a script that used SNMP to gather the data
and have the script create the output using a template and filling in
the variables. That way you can run the script against a few different
hosts and have it create output custom for each host's SNMP info.

Hopefully this is what you're looking for.

Daniel Magnuszewski
CCNA
M & T Bank
dmagnuszewski at mandtbank.com

>>> "Britt Tabor" <Britt_Tabor at Jabil.com> 7/6/2004 10:35:34 AM >>>
I am trying to use templates to make some html changes on my pages.
That all
works great no problems but I am running into a small problem with
MaxBytes.
I am monitoring memory usage on some servers and the RAM size is
different
in each one. MaxBytes in the template file has to be a number it can't
be a
reference to an OID or at least it gives me an error when I try. So how
can
I vary MaxBytes or define it or better yet reference the OID on each
server
and use that?

Britt Tabor

I.T. Infrastructure Engineer

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