oitc/mqtt2elasticsearch repository overview

⁠Quick reference

Maintained by: Michael Oberdorf IT-Consulting⁠

Source code: GitHub⁠

Container image: DockerHub⁠

⁠Supported tags and respective Dockerfile links

• latest, 1.4.0⁠
• 1.3.0⁠
• 1.2.2⁠
• 1.2.1⁠
• 1.1.1⁠
• 1.1.0⁠
• 1.0.0⁠

⁠Summary

The container image is based on Alpine Linux with python3 interpreter. The tool is written in python and connects to a MQTT server and subscripes to one ore more topics. All messages in that topic will be pushed to an elasticsearch or opensearch server.

⁠Prerequisites to run the docker container

1. You need a MQTT server to read the data from the topics.
2. You need an elasticsearch v8 / or opensearch v2 database to store the data inside.

⁠Configuration

⁠Container configuration

The container grab some configuration via environment variables.

⁠General configuration file

The path and filename to the general configuration file can be set via environment variable CONFIG_FILE. By default, the script will use /app/etc/mqtt2elasticsearch.json.

Inside this file we need to configure the Elasticsearch (or Opensearch) and MQTT server connection parameters.

⁠Example with Elasticsearch

{
"DEBUG": true,
"removeIndex": false,
"elasticsearch": {
  "cluster": [ "http://elasticsearch:9200/" ]
  },
"mqtt": {
  "client_id": "mqtt2elasticsearch",
  "user": "mqtt2elasticsearch",
  "password": "myPassword",
  "server": "test.mosquitto.org",
  "port": 1883,
  "tls": false,
  "hostname_validation": true,
  "protocol_version": 3
  }
}

⁠Example with Opensearch

{
"DEBUG": true,
"removeIndex": false,
"opensearch": {
  "hosts": [
    {
      "host": "opensearch",
      "port": 9200
    }
  ],
  "tls": true,
  "verify_certs": true,
  "username": "admin",
  "password": "admin"
  },
"mqtt": {
  "client_id": "mqtt2elasticsearch",
  "user": "mqtt2elasticsearch",
  "password": "myPassword",
  "server": "test.mosquitto.org",
  "port": 1883,
  "tls": false,
  "hostname_validation": true,
  "protocol_version": 3
  }
}

⁠Field description

⁠Elasticsearch/Opensearch index configuration file

The path and filename to the Elasticsearch/Opensearch index configuration file can be set via environment variable ELASTICSEARCH_MAPPING_FILE. By default, the script will use /app/etc/mqtt2elasticsearch-mappings.json.

Inside this file we need to configure the MQTT topic and the associated Elasticsearch/Opensearch index with it's configuration.

⁠Example

This is minimal example. The JSON file contains the MQTT topic as key. Every topic contains the associated Elasticsearch/Opensearch index and an optional index configuration. You can use placeholder inside the index name. Following will be translated on the fly:

• {Y}: the 4-digit year
• {m}: the 2-digit month
• {d}: the 2-digit day

{
  "de/oberdorf-itc/some/topic": {
    "elasticIndex": "mydata-{Y}-{m}",
    "elasticBody": {
    }
  }
}

Full blown examples can be found here:

• speedtest2mqtt-elasticsearch-mapping.json⁠.
• dockerhub-stats-opensearch-mapping.json⁠.

⁠Field description

⁠Running the container image

docker run --rm oitc/mqtt2elasticsearch:latest

⁠Docker compose configuration

services:
  elasticsearch:
    restart: always
    image: elasticsearch:8.10.2
    container_name: elasticsearch
    hostname: elasticsearch
    environment:
      - cluster.name=docker-cluster
      - discovery.type=single-node
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - xpack.security.enabled=false
      - xpack.security.enrollment.enabled=false
    ulimits:
      memlock:
        soft: -1
        hard: -1
    ports:
      - 9200:9200
    volumes:
      - /srv/docker/elasticsearch/data:/usr/share/elasticsearch/data
    healthcheck:
      test: ["CMD", "wget", "http://localhost:9200", "-O-"]
      interval: 1s
      timeout: 1s
      retries: 120

  kibana:
    restart: always
    image: kibana:8.10.2
    container_name: kibana
    hostname: kibana
    ports:
      - 5601:5601
    volumes:
      - /srv/docker/kibana/etc:/usr/share/kibana/config
    depends_on:
      - elasticsearch

  mqtt2elasticsearch:
    restart: always
    image: oitc/mqtt2elasticsearch:latest
    container_name: mqtt2elasticsearch
    hostname: mqtt2elasticsearch
    volumes:
      - /srv/docker/mqtt2elasticsearch/etc/speedtest2mqtt-elasticsearch-mapping.json:/app/etc/mqtt2elasticsearch-mappings.json:ro
    depends_on:
      - elasticsearch

  speedtest2mqtt:
    container_name: speedtest2mqtt
    restart: always
    read_only: true
    user: 2536:2536
    image: oitc/speedtest2mqtt
    environment:
      MQTT_SERVER: test.mosquitto.org
      MQTT_PORT: 1883
      MQTT_TOPIC: de/oberdorf-itc/speedtest2mqtt/results
      FREQUENCE: 300
    secrets:
      - speedtest2mqtt_mqtt_password
    tmpfs:
      - /tmp

secrets:
  speedtest2mqtt_mqtt_password:
    file: /srv/docker/speedtest2mqtt/secrets/mqtt_password

⁠Donate

I would appreciate a small donation to support the further development of my open source projects.

⁠License

Copyright (c) 2023-2026 Michael Oberdorf IT-Consulting

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.