Yanic

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Yet another node info collector

yanic is a respondd client that fetches, stores and publishes information about a Freifunk network. The goals:

• Generating JSON for Meshviewer
• Storing statistics in InfluxDB or Graphite to be analyzed by Grafana
• Provide a little webserver for a standalone installation with a meshviewer

How it works

In the first step Yanic sends a multicast message to the group ff02:0:0:0:0:0:2:1001 and port 1001. Recently seen nodes that does not reply are requested via a unicast message.

Documentation

• Webview
• PDF
• Mobi
• ePUB

Configuration

Read comments in config_example.toml for more information.

Running

Yanic provides several commands:

Usage

Run Yanic without any arguments to get the usage information:

Usage:
  yanic [command]

Available Commands:
  help        Help about any command
  import      Imports global statistics from the given RRD files, requires InfluxDB
  query       Sends a query on the interface to the destination and waits for a response
  serve       Runs the yanic server

Flags:
  -h, --help         help for yanic
      --timestamps   Enables timestamps for log output

Use "yanic [command] --help" for more information about a command.

Serve

Usage:
  yanic serve [flags]

Examples:
  yanic serve --config /etc/yanic.toml

Flags:
  -c, --config string   Path to configuration file (default "config.toml")
  -h, --help            help for serve

Import

Usage:
  yanic import <file.rrd> [flags]

Examples:
  yanic import --config /etc/yanic.toml olddata.rrd

Flags:
  -c, --config string   Path to configuration file (default "config.toml")
  -h, --help            help for import

Query

Usage:
  yanic query <interface> <destination> [flags]

Examples:
  yanic query wlan0 "fe80::eade:27ff:dead:beef"

Flags:
  -h, --help       help for query
      --wait int   Seconds to wait for a response (default 1)

Live

• meshviewer Freifunk Bremen with a patch to show state-version of nodes.json
• grafana Freifunk Bremen show data of InfluxDB

Related projects

Collecting data from respondd:

• HopGlass Server written in Node.js

Respondd for servers:

• ffnord-alfred-announce from FreiFunkNord
• respondd from Sunz3r