dennyreiter / dnsresolve

Simple Home Assistant component to check DNS resolution as a binary sensor

dnsresolve

Simple Home Assistant component to check DNS resolution as a binary sensor. I use this to make sure my DNS servers and Pi-Hole servers are all working. MOst of this is taken right out of Home Assistant Core, mostly the dnsip component switched up to return a binary sensor.

Installation

1. Copy the dnsresolve folder to the custom_components folder in your Home Assistant configuration directory.
2. Add the following code in your configuration.yaml file under binary_sensor::

  - platform: dnsresolve
    name: My DNS
    hostname: myip.opendns.org
    resolver: 192.168.0.8

Configuration

key	required	type	usage
platform	true	string	dnsresolve
name	false	string	The name of your sensor. Defaults to mydns
hostname	false	string	The hostname to check. Defaults to myip.opendns.org
resolver	false	string	DNS server you are checking. Defaults to 208.67.222.222

The defaults aren't much use except to make sure the component is working. I set the hostname to one of my internal names, and the resolver to my DNS server that I want to check. If the sensor returns false, that means that more than likely DNS is not working.