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# shellcheck shell=bash disable=SC1117
# no need for shebang - this file is loaded from charts.d.plugin
# SPDX-License-Identifier: GPL-3.0-or-later
# netdata
# real-time performance and health monitoring, done right!
# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
#
# the postqueue command
# if empty, it will use the one found in the system path
postfix_postqueue=
# how frequently to collect queue size
postfix_update_every=15
postfix_priority=60000
postfix_check() {
# this should return:
# - 0 to enable the chart
# - 1 to disable the chart
# try to find the postqueue executable
if [ -z "$postfix_postqueue" ] || [ ! -x "$postfix_postqueue" ]; then
# shellcheck disable=SC2230
postfix_postqueue="$(which postqueue 2>/dev/null || command -v postqueue 2>/dev/null)"
fi
if [ -z "$postfix_postqueue" ] || [ ! -x "$postfix_postqueue" ]; then
# shellcheck disable=SC2154
error "cannot find postqueue. Please set 'postfix_postqueue=/path/to/postqueue' in $confd/postfix.conf"
return 1
fi
return 0
}
postfix_create() {
cat <<EOF
CHART postfix_local.qemails '' "Postfix Queue Emails" "emails" queue postfix.queued.emails line $((postfix_priority + 1)) $postfix_update_every
DIMENSION emails '' absolute 1 1
CHART postfix_local.qsize '' "Postfix Queue Emails Size" "emails size in KB" queue postfix.queued.size area $((postfix_priority + 2)) $postfix_update_every
DIMENSION size '' absolute 1 1
EOF
return 0
}
postfix_update() {
# the first argument to this function is the microseconds since last update
# pass this parameter to the BEGIN statement (see bellow).
# do all the work to collect / calculate the values
# for each dimension
# remember: KEEP IT SIMPLE AND SHORT
# 1. execute postqueue -p
# 2. get the line that begins with --
# 3. match the 2 numbers on the line and output 2 lines like these:
# local postfix_q_size=NUMBER
# local postfix_q_emails=NUMBER
# 4. then execute this a script with the eval
#
# be very carefull with eval:
# prepare the script and always egrep at the end the lines that are usefull, so that
# even if something goes wrong, no other code can be executed
postfix_q_emails=0
postfix_q_size=0
eval "$(run "$postfix_postqueue" -p |
grep "^--" |
sed -e "s/-- \([0-9]\+\) Kbytes in \([0-9]\+\) Requests.$/local postfix_q_size=\1\nlocal postfix_q_emails=\2/g" |
grep -E "^local postfix_q_(emails|size)=[0-9]+$")"
# write the result of the work.
cat <<VALUESEOF
BEGIN postfix_local.qemails $1
SET emails = $postfix_q_emails
END
BEGIN postfix_local.qsize $1
SET size = $postfix_q_size
END
VALUESEOF
return 0
}
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