df-summary

#!/bin/bash
# Usage: df-summary [cluster-group]
# Shows disk usage for /dev/sda1 and NFS mounts across a cluster, sorted by free space.

source "$(dirname "$0")/pssh4cssh.sh"

GROUP=${1:-vps-all}

hosts=()
while IFS= read -r h; do hosts+=(-H "$h"); done < <(_cluster_hosts "$GROUP")

parse_and_sort() {
  local pattern=$1
  local fs_width=$2
  parallel-ssh "${hosts[@]}" -i "df -h | grep -E '$pattern'" 2>/dev/null | \
  awk -v fw="$fs_width" '
    /\[SUCCESS\]/ { host=$NF; next }
    /\[FAILURE\]/ { host=$NF" (FAILED)"; next }
    NF >= 5 {
      avail = $4
      unit = substr(avail, length(avail))
      val  = substr(avail, 1, length(avail)-1) + 0
      if      (unit == "T") bytes = val * 1024^4
      else if (unit == "G") bytes = val * 1024^3
      else if (unit == "M") bytes = val * 1024^2
      else if (unit == "K") bytes = val * 1024
      else                  bytes = val
      printf "%015.0f %-30s %-*s %-8s %-8s %-8s %s\n", bytes, host, fw, $1, $2, $3, $4, $5
    }
  ' | sort -rn | awk -v fw="$fs_width" '{ $1=""; printf "%-30s %-*s %-8s %-8s %-8s %s\n", $2, fw, $3, $4, $5, $6, $7 }'
}

echo "=== /dev/sda1 ==="
printf "%-30s %-12s %-8s %-8s %-8s %s\n" "HOST" "FILESYSTEM" "SIZE" "USED" "FREE" "USE%"
echo "----------------------------------------------------------------------------------------------"
parse_and_sort '^/dev/sda1 ' 12

echo ""
echo "=== NFS Mounts ==="
printf "%-30s %-40s %-8s %-8s %-8s %s\n" "HOST" "FILESYSTEM" "SIZE" "USED" "FREE" "USE%"
echo "-------------------------------------------------------------------------------------------------------------"
parse_and_sort 'nfs' 40