#!/bin/bash
#
# Copyright Security Onion Solutions LLC and/or licensed to Security Onion Solutions LLC under one
# or more contributor license agreements. Licensed under the Elastic License 2.0 as shown at 
# https://securityonion.net/license; you may not use this file except in compliance with the
# Elastic License 2.0.

. /usr/sbin/so-common

TOTAL_AVAILABLE_SPACE=0

# Iterate through the output of _cat/allocation for each node in the cluster to determine the total available space
for i in $(/usr/sbin/so-elasticsearch-query _cat/allocation | awk '{print $3}'); do
  size=$(echo $i | grep -oE '[0-9].*' | awk '{print int($1+0.5)}')
  unit=$(echo $i | grep -oE '[A-Za-z]+')
  if [ $unit = "tb" ]; then
    size=$(( size * 1024 ))
  fi
  TOTAL_AVAILABLE_SPACE=$(( TOTAL_AVAILABLE_SPACE + size ))
done

# Calculate the percentage of available space based on our previously defined value
echo "$TOTAL_AVAILABLE_SPACE"