Pihole with etckeeper - no, no

2022-03-28

I had my 1 EUR VPS with Pihole+Wireguard running as my phone's always-on VPN tunnel rock-solid for the past 1.5 years. Now, a few weeks ago, it started acting funny. After logging in, it was immediately apparent that the disk was full.

toe@t20 ~ % ssh example.com
(...)

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Mon Mar 28 19:16:34 2022 from 192.0.2.15
/etc/zsh/zshrc:509: write failed: no space left on device

toe@example ~ % df -h
Filesystem             Size  Used Avail Use% Mounted on
udev                   210M     0  210M   0% /dev
tmpfs                   46M  5.2M   41M  12% /run
/dev/mapper/vg00-lv01  7.5G  7.1G     0 100% /
tmpfs                  226M  836K  225M   1% /dev/shm
tmpfs                  5.0M     0  5.0M   0% /run/lock
tmpfs                  226M     0  226M   0% /sys/fs/cgroup
/dev/sda1              464M   83M  353M  19% /boot
tmpfs                   46M     0   46M   0% /run/user/998
tmpfs

I had suspected DNS logs or cache files to fill up the disk, but wrong: It was my /etc, which was pretty weird.

toe@example ~ % sudo du -hs /*
5.6G    /etc
(...)

toe@example ~ % sudo du -h /etc | sort -h
(...)
66M     /etc/.git/objects/8d
77M     /etc/.git/objects/ed
5.5G    /etc/.git
5.5G    /etc/.git/objects
5.6G    /etc