[patentatt]

Pro-tip: pi-hole will eat SD cards in a rpi if you enable logging. Use industrial flash (e.g., seissbit) to avoid a headache every six months.

[Teledhil]

If you don't care about persistent logs, you can mount the /var/log directory on tmpfs. For example, add to your /etc/fstab:

tmpfs /var/log tmpfs nosuid,nodev 0 0