Munin contributed plugins

#!/bin/sh

#

# Plugin to count the open connections for smtp, pop3 and imap

#

# Magic markers - optional - used by installation scripts and

# munin-config:

#

#%# family=auto

#%# capabilities=autoconf

PORTS="25 smtp SMTP

	110 pop3 POP3

	143 imap IMAP

	465 ssmtp SMTP-SSL

	587 submission SMTP (submission)

	993 imaps IMAP-SSL

	995 pop3s POP3-SSL"

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

	ports=$(echo "$PORTS" | cut -f 1 -d " ")

	for port in $ports; do

		netstat -ln | grep -q ":$port " && echo "yes" && exit 0

	 done

	# no open connections for typical mail ports found

        echo "no (no listeners for smtp/pop3/imap ports found)"

        exit 0

fi

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

	cat <<EOT

graph_title Open mail server connections

graph_args --base 1000 -l 0

graph_vlabel connections per second

graph_category mail

EOT

	echo "$PORTS" | while read port field label; do

		echo "${field}.label $label"

		echo "${field}.type DERIVE"

		echo "${field}.min 0"

	 done

	exit 0

fi

echo "$PORTS" | while read port field label; do

	echo -n "${field}.value "

	netstat -n | grep ":$port " | wc -l

 done