Created
November 23, 2016 14:34
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#!/bin/bash | |
mailto=admin@ime.usp.br | |
replyto=admin@ime.usp.br | |
limit=1000 | |
waitfor=30 # minutes | |
# debug | |
if [ "$1" ] && [ "$1" == -d ]; then | |
limit=10 | |
waitfor=1 # minute | |
mailto=leoboiko@ime.usp.br | |
fi | |
lastmessage=/tmp/watchfila.lastmessage | |
spooldir=/var/spool/postfix | |
m4=/usr/bin/m4 | |
postqueue=/usr/sbin/postqueue | |
queues="incoming active deferred" | |
# http://emailregex.com/ | |
# use with grep -E | |
email_regexp="\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b" | |
subject_template="AVISO: HOSTNAME: QUEUESIZE mensagens em QUEUENAME" | |
message_template="A fila 'QUEUENAME' na HOSTNAME passou de QUEUESIZE mensagens. | |
Remetentes mais frequentes: | |
TOP10_SENDERS | |
Destinatários mais frequentes: | |
TOP10_DESTINATIONS | |
" | |
function top10_senders() | |
{ | |
$postqueue -p|grep '^[*0-9A-F]\+'|awk '{print $7}'|sort |uniq -c|sort -nr|head | |
} | |
function top10_destinations() | |
{ | |
$postqueue -p|grep -v '^[*0-9A-F]\+'|grep -E -o "$email_regexp" |sort|uniq -c|sort -nr|head | |
} | |
function already_sent_message() | |
{ | |
if ! [ -f "$lastmessage" ]; then | |
echo "No messages sent recently; checking queues..." | |
return 1 | |
elif [ "$(find "$lastmessage" -mmin +$waitfor)" ]; then | |
echo "Message sent more than $waitfor minutes ago; checking queues..." | |
return 2 | |
else | |
echo "Sent message less than $waitfor minutes ago; not running." | |
return 0 | |
fi | |
} | |
function send_message() | |
{ | |
local queuename="$1" | |
local queuesize="$2" | |
local top10s="$(top10_senders|sed -e 's/^/ /' -e "s/\\n/\\\\n/g")" | |
local top10d="$(top10_destinations|sed -e 's/^/ /' -e "s/\\n/\\\\n/g")" | |
expansions=" | |
-D HOSTNAME=$(hostname) | |
-D QUEUENAME=$queuename | |
-D QUEUESIZE=$queuesize | |
" | |
local subject="$(echo "$subject_template" | $m4 $expansions)" | |
local message="$(echo "$message_template" | $m4 $expansions \ | |
-D TOP10_SENDERS="$top10s" \ | |
-D TOP10_DESTINATIONS="$top10d" | |
)" | |
echo "$message" \ | |
| env \ | |
from="\"$(hostname)\" <root@$(hostname --fqdn)>" \ | |
replyto="admin@ime.usp.br" \ | |
mail \ | |
-s "$subject" \ | |
"$mailto" | |
touch "$lastmessage" | |
} | |
if already_sent_message; then | |
exit 0 | |
fi | |
for queuename in $queues; do | |
count="$(find "$spooldir/$queuename" -type f |wc -l)" | |
if [ $count -ge $limit ]; then | |
echo Sending message to $mailto: $queuename $count | |
send_message $queuename $count | |
exit $? | |
fi | |
done | |
echo "All ok!" | |
exit 0 |
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