#!/bin/bash
#
# Munin plugin using the munin_api module and submodules to log Drupal info.
#
# (c) 2011 Ouest Systèmes Informatiques (OSInet)
#
# Licensed under the General Public License version 2 or later.
#
# This plugin uses CURL to access the Drupal instance over HTTP. For most 
# plugin modules, this could also work in CLI mode using Drush, and a Drush
# plugin implementation is a no-brainer. However, in most cases, this will be a 
# lower performance option, because CLI code is not cached in APC, causing
# extra I/O load to fetch the files from disk everytime, whereas they will
# normally be cached in APC when using HTTP access.

SUB=$(basename $0 | sed s/drupal_/munin_/)

# The timeout needs to be "not too short", because on 
# system reboot, munin will often send probes before
# Apache is ready and, if they timeout, will not register
# the Munin plugins invoking this scripts for further
# probes, and it will have to be restarted manually.
#
# In addition, if you encounter "Connection refused" errors after system
# reboot, you may want to force a munin-node restart. In Ubuntu 10.10,
# for example, this can be done by adding:
#
#   @reboot /bin/sleep 60 ; /usr/sbin/restart munin-node
#
# in /etc/cron.d/munin to force a munin restart 1 minute after cron restart.
#
CURL="/usr/bin/env curl --connect-timeout 60"

echo $CURL
case $1 in
  config)
    $CURL http://$HOST/munin_api/$SUB/config
    exit 0;;
  esac

$CURL http://$HOST/munin_api/$SUB