Why are my GPRINT directives not being drawn into my graphs?

Question

I'm using NagiosGrapher 1.7.1 with our Nagios installation. We're using the packages from the official Debian repositories.

The graphs I've been building work fine so far, except for any GPRINT directives I use. They're simply not processed at all.

An example of a graph definition would be:

define ngraph {
  service_name      CPU Utilization
  graph_perf_regex  cpu_prct_used=([0-9]*\.?[0-9]*)
  graph_value       cpu_prct_used
  graph_units       %
  graph_legend      CPU used %
  page              CPU
  rrd_plottype      AREA
  rrd_color         0000a0
}
define ngraph {
  service_name      CPU Utilization
  type              GPRINT
  print_source      cpu_prct_used
  print_description Last:
  print_function    LAST
  print_format      %2.2lf %%\t
}

Answer 1

According to a thread on monitorin-portal.org, this is an issue introduced in the latest (and last ever) version 1.7.1 of NagiosGrapher.

There seems to be a bug in rrd2-graph.cgi. The file contains a section titled # Adding GPRINTs, which contains the line $repeat = 0;.
Changing that line to $repeat = 1; will resolve the issue and GPRINT directives will be processed.