Text problem in graphes [Solved]

[e-arino]

Hello,

After a fresh install of Cacti, I could not see any text in graphes generated by rrdtool. I've searched the forum a lot about this issue and tried every solution I found but none of them solved my problem.

Here is the system I was working with :

System : Ubuntu 6.04 LTS
PHP : 5.2.5 (installed manually)
RRDtool : 1.2.11 (dpkg install)
Cacti : 0.8.7b (installed manually)

Having noticed with Graph debug turned on that the command line options passed to rrdtool for graph-generation did not include a specific font path, I decided to try the command with font paths specified.

So I ran the command using these options :

Code: Select all

--font TITLE:12:/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf \
--font AXIS:8:/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf \
--font LEGEND:10:/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf \
--font UNIT:8:/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf \

instead of :

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--font TITLE:12: \
--font AXIS:8: \
--font LEGEND:10: \
--font UNIT:8: \

and the generated graph finally contained text.

I figured that the system environment variable RRD_DEFAULT_FONT was not set in a way that the system I was working on understood.

Cacti uses this php function to set the environment variable :

Code: Select all

putenv("RRD_DEFAULT_FONT=" . read_config_option("path_rrdtool_default_font"));

I took this line of code and tried it in a separate script, but the function never worked for me.
So I decided to specify the path explicitly in the command line arguments passed to rrdtool during graph generation.
In lib/rrd.php, function rrdtool_set_font, I replaced

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/* do some simple checks */
        if (!file_exists($font)) {
                $font = "";
        }

by

Code: Select all

$font = "/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf";

and now, everything works fine.

Hope this helps anybody who has not found a different solution.

--
Emilien Arino

[Linegod]

Did you try just putting those into 'Default RRDtool 1.2 Fonts' under the 'Settings/Visual' tab?

[TheWitness]

That would appear to be a problem with PHP's file_exists function or with RRDtool and not having a default font set. You might want to check permissions on the font files vs. the rights of the web site user. If that does not bring joy, there is always other PHP versions.

Per Linegod, by setting the rrdtool default font in Cacti, unless you are in a jailed PHP environment should fix this issue. If you are jailed, then you must compile RRDtool with it's default font set.

Good luck.

TheWitness