munin plugin to monitor Passenger Phusion memory stats

Munin Passenger Phusion Memory Stats.rb

#!/usr/bin/env ruby
# put in /etc/munin/plugins and restart munin-node
# by Dan Manges, http://www.dcmanges.com/blog/rails-application-visualization-with-munin
# NOTE: you might need to add munin to allow passwordless sudo for passenger-memory-stats 
 
def output_config
  puts <<-END
graph_category App
graph_title Passenger memory stats 
graph_vlabel count

memory.label memory
END
  exit 0
end
 
def output_values
  status = `sudo /usr/bin/passenger-memory-stats | tail -1` 
  unless $?.success?
    $stderr.puts "failed executing passenger-memory-stats"
    exit 1
  end
  status =~ /(\d+\.\d+)/
  puts "memory.value #{$1}"
end
 
if ARGV[0] == "config"
  output_config
else
  output_values
end

This works for me when I run
munin-run passenger_memory_stats
but when I check /var/log/munin/munin-node.log it shows
Service 'passenger_memory_stats' timed out.
Any suggestions?

I am having the same issue as well.

Some Passenger installations will put passenger-memory-stats and passenger-status in /usr/local. Modify your plugin(s) to use /usr/local/bin/ instead of /usr/bin as above if your installation puts those files there.