Venus Influx Loader

Introduction

Venus Influx Loader is a small application that allows reatime monitoring, and historical data analysis of Venus devices. It obtains realtime measurements from Venus devices via MQTT, stores them for later analysis into InfluxDB, and allows visualization via Grafana.

It supports connection to the Venus devices:

• Running on the same network and discovered via UPNP.
• Configured manually by setting their IP address.
• Configured via VRM login credentials.

Venus Influx Loader can run nearby a Venus device, and does not require internet access.

It is therefore ideal to be installed on a Yacht, Motorhome, or sites without permanent internet access.

Quick Start

Follow detailed instructions at: https://github.com/victronenergy/venus-grafana to learn how to setup Venus Influx Loader, Influx DB, and Venus Grafana.

Distribution

Venus Influx Loader is distributed as:

• NPM module: https://www.npmjs.com/package/venus-influx-loader
• Docker Image: https://hub.docker.com/r/victronenergy/venus-influx-loader

Development

To start experimenting, please install Docker Desktop and use the following steps to spin up a quick dev environment:

Build Venus Influx Loader docker image locally

$ export OWNER="martin"
$ (cd docker && ./build-dev-image.sh)

Run InfluxDB docker image instance locally

$ (cd docker && ./run-influxdb.sh)

Run Venus Influx Loader docker image locally

$ export OWNER="martin"
$ (cd docker && ./run-dev-image.sh)

Navigate to http://localhost:8088 to access Venus Influx Loader Admin UI, use admin, admin to sign in, and configure what Venus devices to watch.

Install Venus Grafana by following the instructions here: https://github.com/victronenergy/venus-grafana.

Source Code Details

The repository is spit into the following components:

Server

The directory src/server contains node.js based server watching Venus devices using MQTT and storing real time measurements into InfluxDB. It vends two binaries: bin/venus-influx-loader, and bin/venus-upnp-browser.

Venus Influx Loader

Venus Influx Loader allows MQTT connection to the Venus devices running on the same network and discovered via UPNP, configured manually using their IP address, or by accessing them via VRM.

Configuration details and necessary usernames and passwords are stored in config.json, and secrets.json that are looked up under --config-path (/config by default). Config Path needs to be writable.

TODO: should not be needed to config path to be writable in production deployments.

Configuration files can either be created manually, or by starting the Venus Influx Loader, and accessing the Admin UI by browsing to http://localhost:8088. The default usernname and password is admin, admin.

$ npx venus-influx-loader --help
Usage: venus-influx-loader [options]

Monitor Venus devices and capture & store realtime data to serve Grafana

Options:
  -c, --config-path <path>  path to store config.json and secrets.json (default: "/config")
  --disable-admin-api       disable Admin Web User Interface and /admin-api/ endpoint
  --disable-grafana-api     disable Grafana JSON datasource /grafana-api/ endpoint
  --enable-discovery-api    enable venus-upnp-browser /discovery-api/ endpoint
  -p, --port <port>         http port used by Admin Web User Interface and Grafana JSON datasource (default: 8088)
  -h, --help                display help for command

For production use, once the system is configured --disable-admin-api can be used to run the venus-influx-loader headless.

Venus UPNP Browser

Venus Influx Loader contains built in mechanism to discover Venus devices running on the same network via UPNP, that is enabled by default.

In cases where venus-influx-loader may not have access to local network UPNP, such as when it runs in isolated docker network, or in docker bridge mode, venus-upnp-browser can be used to discover Venus devices over UPNP.

The reason behind spliting these two functionalities among two binaries is:

• Docker container running in host networking mode can not expose ports under Docker Desktop for Mac and Windows (docker/for-mac#6185). So venus-influx-loader running in host networking mode can access UPNP, but will not get access to port 8088 to enable Admin UI.
• Docker Desktop since version 4.29 (https://docs.docker.com/network/drivers/host/#docker-desktop) allows to experimentally enable host networking mode in which a container running in host network mode can actually expose UDP/TCP ports and gain access to the host network.
• Docker container running in bridge networking mode does not support UPNP. So venus-influx-loader running in bridge networking mode will properly map port 8088 for Admin UI, but will not have access to UPNP.
• Docker container running in isolated networking mode can expose port 8088, but does not have access to UPNP.

To workaround the limitations, venus-upnp-browser actually runs in docker host mode network - having access to both local area UPNP, as well as venus-influx-loader admin port exposed via docker, venus-upnp-browser communicates discovered Venus devices and diagnostic information to venus-influx-loader via --discovery-api.

Note: host and bridge network mode work properly only on Linux. UPNP does not work in Docker Desktop for Mac at all.

$ npx venus-upnp-browser --help
Usage: venus-upnp-browser [options]

Discover Venus devices running on local network using UPNP

Options:
  -d, --discovery-api <url>  discovery api endpoint (default: "http://localhost:8088/discovery-api/")
  -h, --help                 display help for command

Venus Influx Loader Admin UI

The directory src/client contains react.js based web admin interface to manage configuration of src/server. Client Admin UI app uses webpack to compile the browser JavaScript, HTML, and CSS code.

Development

Start venus-influx-loader, and client in hot reloading mode

$ npm install
$ npm run dev

This command will use concurrently command to start hot reloading development instances of both the src/server, and src/client, so whenever you change source code in src/ everything should get restarted/reloaded automatically.

Alternatively you can spin up only hot reloading server, or only hot reloading client via:

$ npm run watch-influx-loader

and

$ npm run watch-client

Internal API Documentation

Source code is organized according to best practices recommended by https://github.com/crsandeep/simple-react-full-stack.

The directory src/client contains a React.js based web app using React Redux to manage app state and React Router to handle client side routing. User interface is developed using Core UI React Components and follows the structure of Core UI Admin Template.

The directory /src/server is a Node.js app that is configured via /config/config.json and /config/secrets.json to determine what Venus OS devices to watch and how, and where to store data.

/src/server exposes the following internal API routes.

1. /admin protected by admin username and password stored in /config/secrets.json.

   • This route serves compiled and packed src/client html, js, and css web app files from src/client/dist.

2. /admin-api protected by admin username and password stored in /config/secrets.json.

   • /admin-api/config for src/client to GET/PUT /config/config.json.

   • /admin-api/security for scr/client to POST new admin username and password and save to /config/secrets.json.

   • /admin-api/log for src/client to GET recent server log entries.

   • /admin-api/debug to src/client to PUT server in debug or info log mode.

   • /admin-api/vrmLogin POST to login into VRM.

   • /admin-api/vrmLogout POST to logout from VRM.

   • /admin-api/vrmRefresh PUT to refresh list of portals available via VRM.

   • TODO: cleanup (move away from vrm.js ??)

3. /grafana-api that is unprotected and used by Grafana JSON Datasource to query Venus OS devices being watched.

   • /grafana-api/ GET
   • /grafana-api/search POST
   • /grafana-api/query POST

4. Interface for venus-upnp-browser. Unprotected.

   • /discovery-api/log to POSTa new server log entry.
   • /discovery-api/upnpDiscovered to POST info about Venus OS device newly discovered via externally running venus-upnp-browser.
   • TODO: protect with admin username and password so that nobody can flood the log and discovery endpoint?