Managing hostnames for multiple HA instances

Configuration
1

I currently have a single HA instance, running as a hassio installation on a linux VM as per the installation instructions. The VM hostname is docker3.domain.net but HA is accessed as hassio.local or hassio..net.

I now want to add a second HA instance running on a Pi3B+.

By default, this too will register itself as hassio.local and hassio..net.

Do I have to change the hostname of the new instance, and if so, how?

Gareth

2

Don’t think you can. Just access the second one via [ip_address]:8123.

3

if you use a VENV install you can use raspi-config to change the hostname :slight_smile:

4

Thanks, but it’s a hassio installation

5

Thanks, but that isn’t reliable if both HA instances try and register with the internal DNS as hassio.

6

I have two instances of Hassio. A main system and a backup system to be used in case of hardware failure of the main. Normally this backup is powered down but if I do power it up while the main system is running I can access both of them perfectly fine via their IP address.

7

Indeed you can, however you can’t access them both via a domain name. As every other device in the network is accessed via a name, I am loath to having to reduce functionality: mainly because of the hassle if the underlying WiFi adapter is changed.

8

OK. I’ve found it now. There is an option in the hassio configuration to change the hostname of the underlying device.

9

Mind sharing it?

Edit. Never mind. Found it on the Hassio/System page.