Hello guys.
I've been running pihole quite a long time now. However, since we moved I also completely reinstalled pihole and other software on a Raspi 3 B+.
Every now and then, there is a short amount of time (~5-10 Seconds) where DNS queries through pihole fail on all devices. It usually happens once or twice in an hour, but it's definitely not a set interval.
I've tried to find the culprit myself, but I just can't figure out what's causing the problem so I'm coming to you guys for help.
Raspbian 10, Buster
Raspberry Pi 3 Model B Rev 1.2
Running:
- Homeassistant
- Deconz
- Multiple constantly running python scripts (problem persists with all scripts turned off)
- Pihole using Cloudflare DoT Argo Tunnel 1.1.1.1 for DNS (problem persists with pre-set DNS resolvers in the pihole settings)
I've tried having the htop command open to see if any processes use a large amount of resources while the issue is happening, but I couldn't find anything.
Here's a screenshot of htop during an outtage, right before creating the debug log and while it's working fine. Not much seems to change when pihole has it's hickup.
I created this debug log during an outtage. https://tricorder.pi-hole.net/y065xjxi96