#!/bin/bash
# zfs_setup.sh - Create ZFS pool 'tank' on Proxmox host SSDs
# Adjust device names (/dev/sda /dev/sdb) as appropriate for your hardware.

set -euo pipefail

POOL_NAME="tank"
DEVICES=(/dev/sda /dev/sdb)

# Check if pool already exists
if zpool list "$POOL_NAME" >/dev/null 2>&1; then
  echo "ZFS pool '$POOL_NAME' already exists. Exiting."
  exit 0
fi

# Create the pool with RAID-Z (single parity) for redundancy
zpool create "$POOL_NAME" raidz "${DEVICES[0]}" "${DEVICES[1]}"

# Enable compression for better space efficiency
zfs set compression=on "$POOL_NAME"

# Create a dataset for Docker volumes
zfs create "$POOL_NAME/docker"

# Set appropriate permissions for Docker to use the dataset
chmod 777 "/$POOL_NAME/docker"

echo "ZFS pool '$POOL_NAME' created and configured."