Ejabberd Prometheus exporter

ejabberd-exporter.sh

#!/bin/bash

NAMESPACE="ejabberd"
EJABBERD_CLI="docker exec -i ejabberd-1 ejabberdctl"

function gauge() {
    metric_name=$NAMESPACE"_"$1
    help_message=$2
    value=$3

    echo "
# HELP $metric_name $help_message\r\n
# TYPE $metric_name gauge\r\n
$metric_name{} $value\r\n
"
}

function slash_metrics() {
    gauge "visitors"          "Number of visitors connected to Ejabberd"         `$EJABBERD_CLI connected_users_info | grep customer | wc -l`
    gauge "agents"            "Number of agents connected to Ejabberd"           `$EJABBERD_CLI connected_users_info | grep operators | wc -l`
    gauge "http"              "Number of http connections to Ejabberd"           `$EJABBERD_CLI connected_users_info | grep http-bind | wc -l`
    gauge "websocket"         "Number of websocket connections to Ejabberd"      `$EJABBERD_CLI connected_users_info | grep websocket | wc -l`
    gauge "muc"               "Number of muc started on Ejabberd"                `$EJABBERD_CLI muc_online_rooms global | wc -l`
    gauge "instances"         "Number of instances in the Ejabberd cluster"      `$EJABBERD_CLI list_cluster | wc -l`
    gauge "registered_users"  "Number of users registered in Ejabberd"           `$EJABBERD_CLI stats registeredusers`
    gauge "users"             "Number of users in Ejabberd"                      `$EJABBERD_CLI stats onlineusers`
    gauge "processes"         "Number of processes started in Ejabberd cluster"  `$EJABBERD_CLI stats processes`
}

if [ "$1" = "start" ]; then
    echo "Starting server"
    path=$0
    socat tcp-l:9000,reuseaddr,fork EXEC:$path
else
    echo -ne "HTTP/1.1 200 OK\r\n\r\n"`slash_metrics`
fi

$ ./ejabberd-exporter.sh
Starting server

$ curl localhost:9000
# HELP ejabberd_agents Number of agents connected to Ejabberd
# TYPE ejabberd_agents gauge
ejabberd_agents 0
# HELP ejabberd_http Number of http connections to Ejabberd
# TYPE ejabberd_http gauge
ejabberd_http 0
# HELP ejabberd_instances Number of instances in the Ejabberd cluster
# TYPE ejabberd_instances gauge
ejabberd_instances 1
# HELP ejabberd_muc Number of muc started on Ejabberd
# TYPE ejabberd_muc gauge
ejabberd_muc 0
# HELP ejabberd_processes Number of processes started in Ejabberd cluster
# TYPE ejabberd_processes gauge
ejabberd_processes 182
# HELP ejabberd_registered_users Number of users registered in Ejabberd
# TYPE ejabberd_registered_users gauge
ejabberd_registered_users 1
# HELP ejabberd_users Number of users in Ejabberd
# TYPE ejabberd_users gauge
ejabberd_users 0
# HELP ejabberd_visitors Number of visitors connected to Ejabberd
# TYPE ejabberd_visitors gauge
ejabberd_visitors 0
# HELP ejabberd_websocket Number of websocket connections to Ejabberd
# TYPE ejabberd_websocket gauge
ejabberd_websocket 0