icinga2-checks/Other/matrix-host-notification.sh

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#!/usr/bin/env bash
# Based on original E-Mail Icinga2 notification
PROG="$(basename $0)"
ICINGA2HOST="$(hostname)"
CURLBIN="curl"
MX_TXN="$(date "+%s")$((RANDOM % 9999))"
if [ -z "$(which $CURLBIN)" ]; then
echo "$CURLBIN not found in \$PATH. Consider installing it."
exit 1
fi
warn_ico="⚠"
error_ico="❌"
ok_ico="🆗"
question_ico="❓"
#Set the message icon based on service state
# For nagios, replace ICINGA_ with NAGIOS_ to get the environment variables from Nagios
## Function helpers
Usage() {
cat <<EOF
Required parameters:
-d LONGDATETIME (\$icinga.long_date_time\$)
-l HOSTNAME (\$host.name\$)
-n HOSTDISPLAYNAME (\$host.display_name\$)
-o HOSTOUTPUT (\$host.output\$)
-s HOSTSTATE (\$host.state\$)
-t NOTIFICATIONTYPE (\$notification.type\$)
-m MATRIXROOM (\$notification_matrix_room_id\$)
-x MATRIXSERVER (\$notification_matrix_server\$)
-y MATRIXTOKEN (\$notification_matrix_token\$)
Optional parameters:
-4 HOSTADDRESS (\$address\$)
-6 HOSTADDRESS6 (\$address6\$)
-b NOTIFICATIONAUTHORNAME (\$notification.author\$)
-c NOTIFICATIONCOMMENT (\$notification.comment\$)
-i ICINGAWEB2URL (\$notification_icingaweb2url\$, Default: unset)
EOF
}
Help() {
Usage
exit 1
}
Error() {
if [ "$1" ]; then
echo $1
fi
Usage
exit 1
}
## Main
while getopts 4:6::b:c:d:hi:l:n:o:s:t:m:x:y: opt; do
case "$opt" in
4) HOSTADDRESS=$OPTARG ;;
6) HOSTADDRESS6=$OPTARG ;;
b) NOTIFICATIONAUTHORNAME=$OPTARG ;;
c) NOTIFICATIONCOMMENT=$OPTARG ;;
d) LONGDATETIME=$OPTARG ;; # required
h) Help ;;
i) ICINGAWEB2URL=$OPTARG ;;
l) HOSTNAME=$OPTARG ;; # required
n) HOSTDISPLAYNAME=$OPTARG ;; # required
o) HOSTOUTPUT=$OPTARG ;; # required
s) HOSTSTATE=$OPTARG ;; # required
t) NOTIFICATIONTYPE=$OPTARG ;; # required
m) MATRIXROOM=$OPTARG ;; # required
x) MATRIXSERVER=$OPTARG ;; # required
y) MATRIXTOKEN=$OPTARG ;; # required
\?)
echo "ERROR: Invalid option -$OPTARG" >&2
Error
;;
:)
echo "Missing option argument for -$OPTARG" >&2
Error
;;
*)
echo "Unimplemented option: -$OPTARG" >&2
Error
;;
esac
done
shift $((OPTIND - 1))
## Check required parameters (TODO: better error message)
if [ ! "$LONGDATETIME" ] ||
[ ! "$HOSTNAME" ] || [ ! "$HOSTDISPLAYNAME" ] ||
[ ! "$HOSTOUTPUT" ] || [ ! "$HOSTSTATE" ] ||
[ ! "$NOTIFICATIONTYPE" ]; then
Error "Requirement parameters are missing."
fi
## Build the notification message
if [ "$HOSTSTATE" = "UP" ]; then
ICON=$ok_ico
elif [ "$HOSTSTATE" = "DOWN" ]; then
ICON=$error_ico
fi
if [ "$HOSTSTATE" = "UNKNOWN" ]; then
ICON=$question_ico
elif [ "$ICINGA_SERVICESTATE" = "OK" ]; then
ICON=$ok_ico
elif [ "$ICINGA_SERVICESTATE" = "WARNING" ]; then
ICON=$warn_ico
elif [ "$ICINGA_SERVICESTATE" = "CRITICAL" ]; then
ICON=$error_ico
fi
NOTIFICATION_MESSAGE=$(
cat <<EOF
$ICON <b>HOST:</b> $HOSTDISPLAYNAME is <b>$HOSTSTATE!</b> <br/>
<b>When:</b> $LONGDATETIME<br/>
<b>Info:</b> $HOSTOUTPUT<br/>
EOF
)
## Check whether IPv4 was specified.
if [ -n "$HOSTADDRESS" ]; then
NOTIFICATION_MESSAGE="$NOTIFICATION_MESSAGE <b>IPv4:</b> $HOSTADDRESS <br/>"
fi
## Check whether IPv6 was specified.
if [ -n "$HOSTADDRESS6" ]; then
NOTIFICATION_MESSAGE="$NOTIFICATION_MESSAGE <b>IPv6:</b> $HOSTADDRESS6 <br/>"
fi
## Check whether author and comment was specified.
if [ -n "$NOTIFICATIONCOMMENT" ]; then
NOTIFICATION_MESSAGE="$NOTIFICATION_MESSAGE Comment by <b>$NOTIFICATIONAUTHORNAME:</b> $NOTIFICATIONCOMMENT <br/>"
fi
## Check whether Icinga Web 2 URL was specified.
if [ -n "$ICINGAWEB2URL" ]; then
NOTIFICATION_MESSAGE="$NOTIFICATION_MESSAGE $ICINGAWEB2URL/monitoring/host/show?host=$HOSTNAME <br/>"
fi
while read line; do
message="${message}\n${line}"
done <<<$NOTIFICATION_MESSAGE
BODY="${message}"
/usr/bin/printf "%b" "$NOTIFICATION_MESSAGE" | $CURLBIN -k -X PUT --header 'Content-Type: application/json' --header 'Accept: application/json' -d "{
\"msgtype\": \"m.text\",
\"body\": \"$BODY\",
\"formatted_body\": \"$BODY\",
\"format\": \"org.matrix.custom.html\"
}" "$MATRIXSERVER/_matrix/client/r0/rooms/$MATRIXROOM/send/m.room.message/$MX_TXN?access_token=$MATRIXTOKEN"