4

The question is:

How do I make RRDTool generate graphs on Mac OS X ?

I installed rrdtool using homebrew on Mac OS x 10.6.8.

I'm able to create a database, update some data and fetch the data, but I'm not able to generate a graphs for it.

It looks like problem with glib and pango.

Both libraries are installed with homebrew.

I'm using:

  • RRDTool 1.4.7
  • Glib 2.34.2
  • Pango 1.30.1

When I run this:

rrdtool create datafile.rrd DS:packets:ABSOLUTE:900:0:10000000 RRA:AVERAGE:0.5:1:9600 RRA:AVERAGE:0.5:4:9600 RRA:AVERAGE:0.5:24:6000
rrdtool update datafile.rrd N:12322
rrdtool graph graph.png DEF:pkt=datafile.rrd:packets:AVERAGE LINE1:pkt#ff0000:Packets

I get:

(process:34285): GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed
(process:34285): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion `G_IS_OBJECT (object)' failed
(process:34285): GLib-GObject-CRITICAL **: g_object_set_qdata_full: assertion `G_IS_OBJECT (object)' failed
(process:34285): Pango-CRITICAL **: pango_fontset_foreach: assertion `PANGO_IS_FONTSET (fontset)' failed
(process:34285): Pango-CRITICAL **: pango_fontset_foreach: assertion `PANGO_IS_FONTSET (fontset)' failed
(process:34285): Pango-WARNING **: failed to choose a font, expect ugly output. engine-type='PangoRenderCoreText', script='latin'
(process:34285): GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed
(process:34285): Pango-WARNING **: couldn't load font "DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier Not-Rotated 8", modified variant/weight/stretch as fallback, expect ugly output.
(process:34285): GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed
(process:34285): Pango-ERROR **: Could not load fallback font, bailing out.
./test.sh: line 9: 34285 Trace/BPT trap          rrdtool graph graph.png DEF:pkt=datafile.rrd:packets:AVERAGE LINE1:pkt#ff0000:Packets

Thanks

Improve this question
2
  • Looks like it can't find the fonts it needs. I tried manually installing DejaVu Sans Mono but no luck. It might be looking for those fonts in some specific location, outside of the normal OS X fonts dir. P.S.: Looks like upgrading Pango might fix this, but the new version doesn't seem to be in brew repos yet: github.com/mxcl/homebrew/issues/13587 Commented Jan 6, 2013 at 23:42
  • 1
    This works now, under OS X 10.8.3, pango 1.34.0, glib 2.36.1, and rrdtool 1.4.7. Still having trouble? Commented Apr 25, 2013 at 3:51
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