Pi-Hole locks up, no longer reachable

[BuchAir]

Hello to the great developer team,

I am a happy user of Pi-Hole, having it set up a few weeks ago. Starting after about two weeks, Pi-Hole suddenly becomes unresponsive. DNS resolution is no longer possible and Pi-Hole becomes unreachable via the internal private IP. Other internal private IPs stay reachable.
This happens some 2 -3 times a day.
After a reboot, everything is back to normal, till it becomes unreachable again.

I do operate Pi-Hole on a RasperryPi. Native and without any modifications.

Debug Token:

https://tricorder.pi-hole.net/KNKWdc1C/

If you could give me any hint on what is wrong and what I can do to make it permanently work, would be really great and appreciated,

Greetings, Lukas

[deHakkelaar]

Whenever you've got unexpected outages on a Raspi, check for under-voltage/brownouts first:

500 Internal Server Error

Does below one show any Under-voltage messages? sudo journalctl --full --no-hostname --pager-end --grep voltage If so, have a look below: If you see warnings, switch to a higher quality power supply and cable. Low quality power supplies can corrupt storage or cause unpredictable behaviour within the Raspberry Pi. https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#power-supply-warnings

[BuchAir]

Dear deHakkelaar,
thank you for your hint. The RPi was indeed showing under voltage messages. I was not expecting the issue at that end. I replaced the "cheap 12W Apple" power supply with another one. And now I will observe the situation for 24h.

Greetings, Lukas

[deHakkelaar]

@BuchAir

And now I will observe the situation for 24h.

You can add --since to shorten the search:

sudo journalctl --full --no-hostname --pager-end --grep voltage --since yesterday

See the man page:

man journalctl