Munin contributed plugins

#!/bin/bash

# -*- sh -*-

: << =cut

=head1 NAME

lxc_proc - Plugin to monitor LXC Processes count

=head1 CONFIGURATION

env.cgrouppath - Set the path where 'tasks' sysfs files are stored, default: empty

  [lxc_proc]

    user root

    env.cgrouppath /sys/fs/cgroup/cpuacct/lxc/

=head1 INTERPRETATION

This plugin needs root privilege.

=head1 AUTHOR

vajtsz  vajtsz@gmail.com

=head1 LICENSE

Unknown license

=head1 MAGIC MARKERS

 #%# family=auto

 #%# capabilities=autoconf

=cut

. $MUNIN_LIBDIR/plugins/plugin.sh

## find proper sysfs and count it

# Debian 6.0: /sys/fs/cgroup/<container>/tasks

# Ubuntu 12.04 with fstab: /sys/fs/cgroup/lxc/<container>/tasks

# Ubuntu 12.04 with cgroup-lite: /sys/fs/cgroup/cpuacct/lxc/<container>/tasks

# Ubuntu 12.04 with cgroup-bin: /sys/fs/cgroup/cpuacct/sysdefault/lxc/<container>/tasks

# Ubuntu 14.04: /sys/fs/cgroup/systemd/lxc/<container>/tasks

count_processes () {

    [ -z "$1" ] && return 0

    if [ -n "$cgrouppath" ]; then

        SYSFS=$cgrouppath/$1/tasks

        if [ -e $SYSFS ]; then

            return `wc -l < $SYSFS`

        fi

    fi

    for SYSFS in \

        /sys/fs/cgroup/$1/tasks \

        /sys/fs/cgroup/lxc/$1/tasks \

        /sys/fs/cgroup/systemd/lxc/$1/tasks \

        /sys/fs/cgroup/cpuacct/lxc/$1/tasks \

        /sys/fs/cgroup/cpuacct/sysdefault/lxc/$1/tasks \

    ; do

        if [ -e $SYSFS ]; then

            return `wc -l < $SYSFS`

        fi

    done

    return 0

}

guest_names=`lxc-ls | sort -u`

for guest in $guest_names; do

 if lxc-info -n $guest 2>&1 | grep -qs RUNNING ; then

  active="$active $guest"

 fi

done

guest_names="$active"

f_comm='lxc-cgroup  '

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

	if [ -r /proc/stat ]; then

		echo yes

		exit 0

	else

		echo "no (no /proc/stat)"

		exit 0

	fi

fi

if [ "$1" = "config" ]; then

 echo 'graph_title Processes '

 echo 'graph_args -l 0 --base 1000'

 echo 'graph_vlabel Number of processes'

 echo 'graph_category processes'

 for guest_name in $guest_names; do

  guest="$(clean_fieldname $guest_name)"

  echo 'lxc_proc_'$guest'.label '$guest_name': processes'

  echo 'lxc_proc_'$guest'.type GAUGE'

  echo 'lxc_proc_'$guest'.min 0'

 done

 exit 0

fi

 for guest_name in $guest_names; do

  guest="$(clean_fieldname $guest_name)"

  count_processes $guest_name

  tmp_g=$?

  if [ $tmp_g -eq 0 ]; then

    tmp_g=`$f_comm -n $guest_name tasks | wc -l`

  fi

  echo 'lxc_proc_'$guest'.value '$tmp_g

 done