svr_fans.sh

#!/bin/bash

VER="2.10"

# Requires Curl, NetCat, and IPMITool.
PackagesArray=('netcat' 'ipmitool')

# Set Server Arrays
ServerIPArray=(); ServerNameArray=(); ServerUserArray=(); ServerPassArray=(); ServerFanspeedArray=()

# Set Script Update Strings
SCRIPT="$(readlink -f "$0")"
SCRIPTFILE="$(basename "$SCRIPT")"
SCRIPTPATH="$(dirname "$SCRIPT")"
SCRIPTNAME="$0"
ARGS=( "$@" )
BRANCH="main"
CONF=""
SPEED=0
USESPEEDARRAY=0

# Script Update Function
self_update() {
  echo "3. Script Updates:"
  echo
  # Check if script path is a git clone.
  #   If true, then check for update.
  #   If false, skip self-update check/funciton.
  if [[ -d "$SCRIPTPATH/.git" ]]; then
    echo "  ✓ Git Clone Detected: Checking Script Version..."
    cd "$SCRIPTPATH" || exit 1
    timeout 1s git fetch --quiet
    timeout 1s git diff --quiet --exit-code "origin/$BRANCH" "$SCRIPTFILE"
    [ $? -eq 1 ] && {
      echo "   ✗ Version: Mismatched."
      echo
      echo "3a. Fetching Update..."
      if [ -n "$(git status --porcelain)" ]; then # opposite is -z
        git stash push -m 'local changes stashed before self update' --quiet
      fi
      git pull --force --quiet
      git checkout $BRANCH --quiet
      git pull --force --quiet
      echo
      echo "  ✓ Update Complete. Running New Version. Standby..."
      sleep 3
      cd - > /dev/null || exit 1  # return to original working dir
      exec "$SCRIPTNAME" "${ARGS[@]}"

      # Now exit this old instance
      exit 1
    }
    echo "   ✓ Version: Current."
  else
    echo "  ✗ Git Clone Not Detected: Skipping Update Check"
  fi
}

# Package Check/Install Function
packages() {
  echo "2. Required Packages:"
  echo
  install_pkgs=" "
  for keys in "${!PackagesArray[@]}"; do
    REQUIRED_PKG=${PackagesArray[$keys]}
    PKG_OK=$(command -v "$REQUIRED_PKG")
    if [ "" = "$PKG_OK" ]; then
      echo "  ✗ $REQUIRED_PKG: Not Found."
      install_pkgs+=" $REQUIRED_PKG"
    else
      echo "  ✓ $REQUIRED_PKG: Found."
    fi
  done
  if [ " " != "$install_pkgs" ]; then
  echo
  echo "2a. Installing Missing Packages:"
  echo
  apt install -y "$install_pkgs"
  fi
}

# Usage Example Function
usage_example() {
  echo 'Usage: ./svr_fans.sh <h> <##> /full/path/config.conf'
  echo
  echo '    ##                Global FanSpeed Percentage (Optional)'
  echo '                      (Number between 20 and 100)'
  echo '                  (This will over-ride any speeds set in CONF)'
  echo
  echo '    /path/file.ext    Config file path and name'
  echo
  echo '    -h or h           Show this usage and exit.'
  echo
  exit 0
}

# Flag Processing Function
flags() {

    # Check for HELP argument
    { [ "$1" = "h" ] || [ "$1" = "-h" ]; } && usage_example
    { [ "$2" = "h" ] || [ "$2" = "-h" ]; } && usage_example
    { [ "$3" = "h" ] || [ "$3" = "-h" ]; } && usage_example
  
    echo "1. Preprocessing:"
    echo
    echo "  - Validating CONF..."
  
    # Check for CONF argument
    if [[ -f ${1} ]]; then
      CONF=$1
    elif [[ -f ${2} ]]; then
      CONF=$2
    elif [[ -f ${3} ]]; then
      CONF=$3
    else
      echo "  ✗ Missing or Invalid CONF."
      echo
      usage_example
    fi
  
    # Load Arrays from CONF file
    { read -a ServerIPArray; read -a ServerNameArray; read -a ServerUserArray; read -a ServerPassArray; read -a ServerFanspeedArray; } <"$CONF" #$SCRIPTPATH/svr_fans.conf

    # Check for equal array element counts (skip FanspeedArray)
    if ! [[ "${#ServerIPArray[@]}|${#ServerNameArray[@]}|${#ServerUserArray[@]}|${#ServerPassArray[@]}" = "${#ServerIPArray[@]}|${#ServerIPArray[@]}|${#ServerIPArray[@]}|${#ServerIPArray[@]}" ]]; then
      echo "  ✗ CONF contents are Invalid."
      echo
      usage_example
    fi

    echo "  ✓ CONF appears valid."
    echo
    echo "  - Validating Fan Speed(s)..."

    # Check for SPEED argument
    if [[ $1 =~ ^[0-9]+$ ]]; then
      SPEED=$1
    elif [[ $2 =~ ^[0-9]+$ ]]; then
      SPEED=$2
    elif [[ $3 =~ ^[0-9]+$ ]]; then
      SPEED=$3
    elif [[ ${#ServerFanspeedArray[@]} -gt 0 ]]; then
      USESPEEDARRAY=1
    else
      echo "  ✗ Missing or Invalid Fan Speed."
      echo
      usage_example
    fi 
  
    # Check for SPEED argument range
    if [ "$USESPEEDARRAY" -eq 0 ]; then
      if [ "$SPEED" -lt 20 ] || [ "$SPEED" -gt 100 ]; then
        echo '  ✗ Fan Speed Variable Out of Range.'
        echo
        usage_example
      fi
    fi
    if [ "$USESPEEDARRAY" -eq 1 ]; then
      echo "  ✓ CONF Fan Speeds appear valid."
    else
      echo "  ✓ Global Over-ride Fan Speed appear valid."
    fi
    echo
}

# Execute Script
clear
echo "======================================================"
echo " Dell PowerEdge R720xd Server Fan Control"
echo "   v$VER by DocDrydenn"
echo "======================================================"
echo

# Flag Check
flags "$1" "$2" "$3"

# Package Check
packages #Uncomment for Production
echo
self_update #Uncomment for Production
echo

# Set FanControl String
FanControl='raw 0x30 0x30 0x01 0x00'

# Let's Do It!
echo "4. Fan Control:"
echo
for keys in "${!ServerNameArray[@]}"; do
  echo " ======================================================"
  echo "  Checking for ${ServerNameArray[$keys]}"
  if nc -z -w 5 "${ServerIPArray[$keys]}" 22 2>/dev/null; then
    echo "  ✓ ${ServerNameArray[$keys]} Found"
    echo
    echo -n "    - Requesting ${ServerNameArray[$keys]} Fan Control..."
    if ipmitool -I lanplus -H ${ServerIPArray[$keys]} -U ${ServerUserArray[$keys]} -P ${ServerPassArray[$keys]} $FanControl; then
      echo "    ✓ Fan Control Granted"
      echo
      if [ "$USESPEEDARRAY" -eq 1 ]; then
        SPEED=${ServerFanspeedArray[$keys]}
      fi
      FanSpeed='raw 0x30 0x30 0x02 0xff 0x'$( printf '%x\n' "$SPEED" )
      echo -n "    - Requesting Fans Set to $SPEED%..."
      if ipmitool -I lanplus -H ${ServerIPArray[$keys]} -U ${ServerUserArray[$keys]} -P ${ServerPassArray[$keys]} $FanSpeed; then
        echo "    ✓ Fans Set to $SPEED%"
      else
        echo "    ✗ Setting Fans to $SPEED% Failed"
      fi
    else
      echo "    ✗ Fan Control Denied"
    fi
  else
    echo "  ✗ ${ServerNameArray[$keys]} Not Found"
  fi
  echo
  ipmitool -I lanplus -H ${ServerIPArray[$keys]} -U ${ServerUserArray[$keys]} -P ${ServerPassArray[$keys]} sdr type temperature | grep $
  echo
done

echo "======================================================"
echo " Dell PowerEdge R720xd Server Fan Control"
echo "======================================================"
echo
exit 0