Small PoC script showing the disk usage can grow very quickly with forgotten volumes (and it's not removable through docker rm[i])

crush-ze-docker-storage.sh

#!/bin/bash
set -eou pipefail

COUNT=5
SIZE_IN_MB=500

while [[ $COUNT > 0 ]]; do
  sudo du -sm /var/lib/docker
  docker run -v /pouet debian fallocate -l ${SIZE_IN_MB}M /pouet/test.img
  COUNT=$(( $COUNT - 1 ))
done