DNS issues in HA Addon

[Meatballs1]

If you look at the DNS logs on the HAOS console the names it is trying to resolve are all appended with .local.hass.io

[Meatballs1]

So the /etc/resolve.conf contains search local.hass.io within the container.

Removing this and restarting the container works. Not sure if it will be updated when DHCP reloads in the container?

This is presumably being set by DHCP/docker configuration settings in HAOS.

[Meatballs1]

home-assistant/plugin-dns#118
home-assistant/operating-system#2988

[Meatballs1]

Potential workarounds:

• ha-login.py adds .local or dns suffix to the hostnames
• hcsocket catches exception and retries with .local?
• container manages /etc/resolv.conf and removes the search whenever it loads/dhcp restarts?

[pmagyar]

I have done some research:

1. i think mdns in HomeAssistant ist working. I have checked it with:

root@:~# ha dns info
fallback: true
host: 172.30.32.3
llmnr: true
locals:
- dns://192.168.178.1
mdns: true
servers: []
update_available: false
version: 2024.04.0
version_latest: 2024.04.0

2. but only the fqdn ist working in the container:

root@4790c40a-hcpy:/app# host siemens-dishwasher
root@4790c40a-hcpy:/app# host siemens-dishwasher.fritz.box
siemens-dishwasher.fritz.box has address 192.168.178.28
root@4790c40a-hcpy:/app# host siemens-dishwasher.local
Host siemens-dishwasher.local not found: 2(SERVFAIL)
root@4790c40a-hcpy:/app#

3. I looked at other addons. For example the MQTT Browser Addon https://github.com/GollumDom/addon-repository
   With this addon, i have the same issue. Only the ip or the fqdn works as Host....

4. the issues that you found are interesting. I have found another one No SERVFAIL and no forwarding multicast names home-assistant/plugin-dns#86

I think currently it is not possible with homeassistant ( ... or i have a bug in my setup....).
Anyway, i think at first the workaround "ha-login.py adds .local or dns suffix to the hostnames" sounds good.
- Maybe we should create a parameter e.g. "--dns-tld" where everyone can add his own tld (?)

[Meatballs1]

Adding a domain suffix option would be a better workaround than manually changing the addresses I think