pihole-FTL suddenly started to fail (on docker)

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1

a perfectly fine pihole started barfing all of a sudden.

The FTL log has these lines

[2024-05-01 11:28:23.063 246M] delete_shm(): shm_unlink(FTL-settings) failed: No such file or directory
[2024-05-01 11:28:23.063 246M] delete_shm(): shm_unlink(FTL-dns-cache) failed: No such file or directory
[2024-05-01 11:28:23.063 246M] delete_shm(): shm_unlink(FTL-per-client-regex) failed: No such file or directory
[2024-05-01 11:28:23.063 246M] ########## FTL terminated after 17m 23s (code 1)! ##########
[2024-05-01 11:28:23.063 246M] FATAL ERROR in dnsmasq core: duplicate dhcp-host IP address 192.168.2.215 at line 68 of /etc/dnsmasq.d/20-bitwarp.conf

pihole-FTL

root@gbrix01:/etc/dnsmasq.d# pihole-FTL dnsmasq-test

dnsmasq: duplicate dhcp-host IP address 192.168.2.215 at line 68 of /etc/dnsmasq.d/20-bitwarp.conf.broke
Segmentation fault (core dumped)
root@gbrix01:/etc/dnsmasq.d#

All I did was unplug one machine from the lan being managed. Removing the offending dnsmasq,conf file makes pihole-FTL pass the dnsmasq-test, but then it stil complains about the shm stuff.

/dev/shm directory is EMPTY (on docker)

Here is the pihole -d https://tricorder.pi-hole.net/8aS28N18/

(I just rebuilt the docker image too)
I am stumped. Please help

2

Your debug log shows 2 different files with the exact same content, in /etc/dnsmasq.d/:

-rw-r--r-- 1 pihole pihole 3.0K May  1 10:58 /etc/dnsmasq.d/20-bitwarp.conf.broke

and

-rw-r--r-- 1 pihole pihole 3.0K Dec 13 17:55 /etc/dnsmasq.d/20-bitwarp.conf~

Try to move those files to a different path (or delete them) and restart the container.

3

Tried that. didn't work. pihole-FTL still crashes with shm errors

4

no. it did work. WTF?

Okay, is it that there was a editor backup file? Did that make pihole crash?

5

I am still very confused.

So it looks like I had duplicate entries in 04-pihole-static-dhcp.conf
that I made through the pihole webui which conflicted with some older settings I had when I imported the outer dnsmasq config to pihole (THAT dnsmasq service is disabled)

This was fine for months and months. Why did it start failing now?

6

So is it that now it's a fatal error to have duplicate dhcp-host

dhcp-host=MACDDR,HOSTNAME,IPADDR

config lines?

7

It has always been a fatal error. The crash comes from

https://github.com/pi-hole/FTL/issues/1942#issuecomment-2084994730

and is obviously unintended

8

O I C.
thank you for the quick response.

9

https://github.com/pi-hole/FTL/pull/1946

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