#!/bin/bash
# -*- sh -*-

: << =cut

=head1 NAME

lxc_cpu - Plugin to monitor LXC CPU usage

=head1 CONFIGURATION

  [lxc_*]
    user root

=head1 INTERPRETATION

This plugin needs root privilege.

=head1 AUTHOR

vajtsz  vajtsz@gmail.com
mitty   mitty@mitty.jp
(many changes schaefer@alphanet.ch)

=head1 LICENSE

2-clause BSD License
or GPLv3 license, at your option

=head1 MAGIC MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=cut

. $MUNIN_LIBDIR/plugins/plugin.sh

. $MUNIN_LIBDIR/plugins/lxc-lib

active_guests=$(active_guests)

if [ "$1" = "autoconf" ]; then
   lxc_autoconf
fi

if [ "$1" = "config" ]; then
   cat <<EOF
graph_title CPU Usage
graph_args -l 0 --base 1000
graph_vlabel USER_HZ
graph_category lxc
EOF
 
   for n in $active_guests
   do
      g=$(lxc_clean_fieldname $n)
      for i in user system
      do
         cat <<EOF
cpu_${i}_${g}.label $n: $(echo ${i:0:1} | tr "[:lower:]" "[:upper:]")${i:1}
cpu_${i}_${g}.type DERIVE
cpu_${i}_${g}.min 0
EOF
      done
   done
   exit 0
fi

for n in $active_guests
do 
   g=$(lxc_clean_fieldname $n)
 
   for i in user system
   do 
      echo "cpu_${i}_${g}.value $(lxc_cgroup -n $n cpuacct.stat | grep $i | awk '{ print $2; }')"
   done
done