Munin contributed plugins

#!/bin/sh

#

# Plugin to monitor the number of open connexions to LDAP

#

# $Log: ldap_connections,v $

# Revision 1.9  2008/05/20 21:30:34  cvserver

# Corrections de bugs

#

# Revision 1.8  2007/09/03 09:35:37  cvserver

# Correction2 pour OpenBSD

#

# Revision 1.7  2007/09/03 09:01:07  cvserver

# Modif pour OpenBSD

#

# Revision 1.6  2007/03/02 07:52:52  cvserver

# pas LISTEN pour les IPs utilis?es (en cas de *:389)

#

# Revision 1.5  2007/03/01 16:06:53  cvserver

# corrections:

#  - reinitialisation de $IPS_BOUND au debut de la fonction find_ip_bound

#  - precision dans le grep (LISTEN)

#

# Revision 1.4  2006/09/27 11:56:54  cvserver

# + sockets

#

# Revision 1.3  2006/06/24 23:38:30  cvserver

# correction

#

# Revision 1.2  2006/06/24 23:24:30  cvserver

# correction

#

# Revision 1.1  2006/06/24 23:15:25  cvserver

# connexions LDAP pour munin

#

#

# plugin-conf.d/-options:

#

#       netstat         -- path to netstat executable

#       ports           -- ldap ports used (389 and 636)

#			   only used ones are graphed

#	socket		-- ldapi socket (default: /var/run/openldap/ldapi)

#

# Parameters:

#

# 	config   (required)

# 	autoconf (optional - used by munin-config)

#

# Magic markers (Used by munin-config and some installation scripts.

# Optional):

#

#%# family=contrib

#%# capabilities=autoconf

NETSTAT=${netstat:-`which netstat`}

NETSTAT=${NETSTAT:-/usr/bin/netstat}

PORTS=${ports:-389 636}

TEMP_FILE=$(mktemp /tmp/munin_ldap.XXXXXX)

trap "rm -f ${TEMP_FILE}" EXIT

PATH=/bin:/usr/bin:/usr/local/bin

SOCKET=${socket:-/var/run/openldap/ldapi}

case $(uname -s) in

  *BSD)

    NETSTAT_ARGS="-an -ptcp"

    FAMILYMARK="-f "

    ;;

  Linux)

    NETSTAT_ARGS="-alnt"

    FAMILYMARK="--"

    ;;

  *)

    NETSTAT_ARGS="-an"

    FAMILYMARK="-f "

    ;;

esac

$NETSTAT $NETSTAT_ARGS > $TEMP_FILE

# arg: port

find_ips_bound() {

  port=$1

  IPS_BOUND=""

  for i in $(grep "^tcp[46]\{0,1\}\([[:space:]]\{1,\}[[:digit:]]\{1,\}\)\{2\}[[:space:]]\{1,\}\(\([0-9]\)\{1,3\}\.\)\{3\}[0-9]\{1,3\}[\.:]$port[[:space:]].*" $TEMP_FILE | awk '{print $4}' | sed "s/^\(.*\)[\.:]$port$/\1/"); do

    echo $IPS_BOUND | grep "$i" > /dev/null || IPS_BOUND=$IPS_BOUND" $i"

  done

  echo $IPS_BOUND

}

# see which port(s) is/are really bound

LISTENING_PORTS=""

for port in $PORTS; do

  find_ips_bound $port > /dev/null && LISTENING_PORTS="$LISTENING_PORTS$port "

done

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

  ONE_LISTENING=""

  for port in $PORTS; do

    ONE_LISTENING=${ONE_LISTENING}$(find_ips_bound $port)

  done

  if [ -n "$ONE_LISTENING" ]; then

  	echo yes

  	exit 0

  else

  	echo no '(no slapd listening on '$PORTS')'

  	exit 1

  fi

fi

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

  echo 'graph_title LDAP connections'

  echo 'graph_args -l 0'

  echo 'graph_vlabel active connections to ldap by port'

  echo 'graph_category network'

  for port in $LISTENING_PORTS; do

    for ip in $(find_ips_bound $port | sed 's/\./_/g'); do

      echo "${ip}_${port}.label ${ip}:${port}"

    done

  done

  if [ -e $SOCKET ]; then

    if [ $($NETSTAT -an ${FAMILYMARK}unix | grep $SOCKET | wc -l) -gt 0 ]; then

      echo "socket.label ldapi"

    fi

  fi

  exit 0

fi

for port in $LISTENING_PORTS; do

  for ip in $(find_ips_bound $port); do

    label=$(printf "%s_%d" "$(echo $ip | tr ':.' '_')" "$port")

    connections=$(

      awk -v ip_port="${ip}:${port}" \

        'BEGIN { counter=0 }

         $1 ~ /tcp[46]?/ && $4 == ip_port && $6 == "ESTABLISHED" { counter++ }

         END { print counter }' \

        $TEMP_FILE

    )

    printf "%s.value %d\n" "$label" "$connections"

  done

done

if [ -e "$SOCKET" ]; then

  echo "socket.value $($NETSTAT -an ${FAMILYMARK}unix | grep $SOCKET | wc -l | sed 's/[[:space:]]*//g')"

fi