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#!/bin/sh
# Munin plugin for monitoring Postfix per-service and per-instance
# usage. Symlink/rename to 'postfix_sasl_$SERVICE_$SYSLOGNAME'.
# Copyright © 2015 Guilhem Moulin <guilhem@fripost.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
PATH=/usr/bin:/bin:/usr/sbin:/sbin
set -u
LOGFILE="/var/log/${logfile:-mail.log}"
STATEFILE="$MUNIN_PLUGSTATE/${0##*/}.offset"
name="${0##*/}"
name="${name#postfix_stats_}"
if [ "${name#postscreen_}" != "$name" ]; then
postfix="${name#postscreen_}"
service=postscreen
fields='connected accepted passed'
elif [ "${name#smtpd_}" != "$name" ]; then
postfix="${name#smtpd_}"
service=smtpd
fields='connected accepted queued'
elif [ "${name#qmgr_}" != "$name" ]; then
postfix="${name#qmgr_}"
service=qmgr
fields='queued'
elif [ "${name#smtp_}" != "$name" ]; then
postfix="${name#smtp_}"
service=smtp
fields='sent deliverable deferred undeliverable bounced'
elif [ "${name#lmtp_}" != "$name" ]; then
postfix="${name#lmtp_}"
service=lmtp
fields='sent deliverable deferred undeliverable bounced'
elif [ "${name#pipe_}" != "$name" ]; then
postfix="${name#pipe_}"
service=pipe
fields='sent deliverable deferred undeliverable bounced'
fi
case "${1:-}" in
config) cat <<- EOF
graph_title Postfix $service message throughput ($([ -n "$postfix" -a "$postfix" != postfix ] && echo "'${postfix#postfix-}'" || echo default) instance)
graph_vlabel mails per \${graph_period}
graph_args --base 1000 -l 0
graph_scale no
graph_period minute
graph_category postfix
EOF
for field in $fields; do
echo "$field.label $field"
echo "$field.type DERIVE"
echo "$field.draw AREA"
echo "$field.min 0"
done
exit 0
;;
esac
if [ ! -f "$LOGFILE" ]; then
for field in $fields; do
echo "$field.value U"
done
exit 0;
fi
tmpfile="$(mktemp --tmpdir)"
trap 'rm -f "$tmpfile"' EXIT
logtail -f"$LOGFILE" -o"$STATEFILE" | sed -nr "s#^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ $postfix/$service\[[[:digit:]]+\]: ##p" >"$tmpfile"
case "$service" in
postscreen)
connected=$(grep -Ec "^CONNECT from\s" "$tmpfile")
rejected=$( grep -Ec "^NOQUEUE: reject:\s" "$tmpfile")
passed=$( grep -Ec "^(PASS (OLD|NEW)|WHITELISTED)\s" "$tmpfile")
echo connected.value $connected
echo accepted.value $(($rejected + $passed))
echo passed.value $passed
;;
smtpd)
connected=$(grep -Ec "^connect from\s" "$tmpfile")
rejected=$( grep -Ec "^NOQUEUE: reject:\s" "$tmpfile")
queued=$( grep -Ec "^[[:xdigit:]]+: client=" "$tmpfile")
echo connected.value $connected
echo accepted.value $(($rejected + $queued))
echo queued.value $queued
;;
qmgr)
queued=$(grep -Ec "^[[:xdigit:]]+: from=<\S+>, .*\(queue active\)$" "$tmpfile")
echo queued.value $queued
;;
smtp|lmtp|pipe)
for field in $fields; do
v=$(grep -Ec "^[[:xdigit:]]+:( [^ =]+=\S+,)+ status=$field(\s.*)?$" "$tmpfile")
echo $field.value $v
done
;;
esac
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