Destroys and resets node disks for OSDs after a cluster reset

ceph-disk-reset.sh

#!/bin/bash

# Warning! Destructive!
# https://rook.io/docs/rook/latest-release/Getting-Started/ceph-teardown/#delete-the-data-on-hosts
# Run a rook-ceph-tools daemonset and run this on each node:

FDISK_BEFORE=$(fdisk -l); \
  DISK="/dev/sda"; \
  sgdisk --zap-all $DISK; \
  dd if=/dev/zero of="$DISK" bs=1M count=100 oflag=direct,dsync; \
  blkdiscard $DISK; \
  partprobe $DISK; \
  ls /dev/mapper/ceph-* | xargs -I% -- dmsetup remove %; \
  rm -rf /dev/ceph-*; \
  rm -rf /dev/mapper/ceph--*; \
  diff <(echo "$FDISK_BEFORE") <(fdisk -l)
  
# Then, delete the rook-ceph-operator pod to re-run the osd-prepare job pods