#!/bin/sh # -*- sh -*- : << =cut =head1 NAME dhcp_leases - Plugin to monitor the number of active dhcp leases =head1 CONFIGURATION The following environment variables are used by this plugin: =over 4 =item leases_warning <int> Threshold for when to report a warning =item leases_critical <int> Threshold for when to report a critical =back =head2 EXAMPLE CONFIGURATION [load] env.leases_warning 400 env.leases_critical 500 =head1 NOTES If run with the "autoconf"-parameter, give our opinion on whether we should be run on this system or not. This is optional, and only used by munin-config. In the case of this plugin, we should most probably always be included. =head1 MAGIC MARKERS #%# family=auto #%# capabilities=autoconf =cut . $MUNIN_LIBDIR/plugins/plugin.sh if [ "$1" = "autoconf" ]; then echo yes exit 0 fi # If run with the "config"-parameter, give out information on how the # graphs should look. if [ "$1" = "config" ]; then # The host name this plugin is for. (Can be overridden to have # one machine answer for several) # The title of the graph echo 'graph_title Active DHCP Leases' # Arguments to "rrdtool graph". In this case, tell it that the # lower limit of the graph is '0', and that 1k=1000 (not 1024) echo 'graph_args --base 1000 -l 0' # The Y-axis label echo 'graph_vlabel leases' # We want Cur/Min/Avg/Max unscaled (i.e. 0.42 load instead of # 420 milliload) echo 'graph_scale no' # Graph category. Defaults to 'other' echo 'graph_category network' # The fields. "label" is used in the legend. "label" is the only # required subfield. echo 'dhcp_leases.label leases' # These two read the environment for warning values for the field # "load". If "load_warning" or "warning" aren't set in the # environment, no warning levels are set. Likewise for "load_critical" # and "critical". print_warning leases print_critical leases # This one is purely to add an explanation to the web page. The first # one is for the graph itself, while the second one is for the field # "load". echo 'graph_info This graph shows the curretly active leases' echo 'dhcp_leases.info currently active leases' # Last, if run with the "config"-parameter, quit here (don't # display any data) exit 0 fi # If not run with any parameters at all (or only unknown ones), do the # real work - i.e. display the data. Almost always this will be # "value" subfield for every data field. echo -n "dhcp_leases.value " python /usr/local/bin/dhcp-leases.py | grep "Total Active Leases" | cut -f2 -d":"|sed -e's/ //g'