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#!/bin/sh
# Munin plugin for monitoring Dovecot IMAP connections and unique users.
# 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
case "${1:-}" in
config) cat <<- EOF
graph_title Dovecot concurrent IMAP usage
graph_args --base 1000 -l 0
graph_scale no
graph_category dovecot
connections.label connections
connections.min 0
users.label unique users
users.min 0
EOF
exit 0
;;
esac
tmpfile="$(mktemp --tmpdir)"
trap 'rm -f "$tmpfile"' EXIT
doveadm -f flow who -1 | sed -nr 's/^username=(\S+)\s+proto=imap\s.*/\1/p' >"$tmpfile"
echo connections.value $(wc -l <"$tmpfile")
echo users.value $(sort -u "$tmpfile" | wc -l)
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