#!rsc by RouterOS
# RouterOS script: check-health
# Copyright (c) 2019-2024 Christian Hesse <mail@eworm.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
#
# requires RouterOS, version=7.14
#
# check for RouterOS health state
# https://git.eworm.de/cgit/routeros-scripts/about/doc/check-health.md

:global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }

:local ExitOK false;
:do {
  :local ScriptName [ :jobname ];

  :global CheckHealthCPUUtilization;
  :global CheckHealthCPUUtilizationNotified;
  :global CheckHealthLast;
  :global CheckHealthRAMUtilizationNotified;
  :global CheckHealthTemperature;
  :global CheckHealthTemperatureDeviation;
  :global CheckHealthTemperatureNotified;
  :global CheckHealthVoltageLow;
  :global CheckHealthVoltagePercent;
  :global Identity;

  :global FormatLine;
  :global HumanReadableNum;
  :global IfThenElse;
  :global LogPrint;
  :global ScriptLock;
  :global SendNotification2;
  :global SymbolForNotification;

  :local TempToNum do={
    :global CharacterReplace;
    :local T [ :toarray [ $CharacterReplace $1 "." "," ] ];
    :return ($T->0 * 10 + $T->1);
  }

  :if ([ $ScriptLock $ScriptName ] = false) do={
    :set ExitOK true;
    :error false;
  }

  :local Resource [ /system/resource/get ];

  :set CheckHealthCPUUtilization (($CheckHealthCPUUtilization * 4 + ($Resource->"cpu-load") * 10) / 5);
  :if ($CheckHealthCPUUtilization > 750 && $CheckHealthCPUUtilizationNotified != true) do={
    $SendNotification2 ({ origin=$ScriptName; \
      subject=([ $SymbolForNotification "abacus,chart-increasing" ] . "Health warning: CPU utilization"); \
      message=("The average CPU utilization on " . $Identity . " is at " . ($CheckHealthCPUUtilization / 10) . "%!") });
    :set CheckHealthCPUUtilizationNotified true;
  }
  :if ($CheckHealthCPUUtilization < 650 && $CheckHealthCPUUtilizationNotified = true) do={
    $SendNotification2 ({ origin=$ScriptName; \
      subject=([ $SymbolForNotification "abacus,chart-decreasing" ] . "Health recovery: CPU utilization"); \
      message=("The average CPU utilization on " . $Identity . " decreased to " . ($CheckHealthCPUUtilization / 10) . "%.") });
    :set CheckHealthCPUUtilizationNotified false;
  }

  :local CheckHealthRAMUtilization (($Resource->"total-memory" - $Resource->"free-memory") * 100 / $Resource->"total-memory");
  :if ($CheckHealthRAMUtilization >=80 && $CheckHealthRAMUtilizationNotified != true) do={
    $SendNotification2 ({ origin=$ScriptName; \
      subject=([ $SymbolForNotification "card-file-box,chart-increasing" ] . "Health warning: RAM utilization"); \
      message=("The RAM utilization on " . $Identity . " is at " . $CheckHealthRAMUtilization . "%!\n\n" . \
      [ $FormatLine "total" ([ $HumanReadableNum ($Resource->"total-memory") 1024 ] . "B") 8 ] . "\n" . \
      [ $FormatLine "used" ([ $HumanReadableNum ($Resource->"total-memory" - $Resource->"free-memory") 1024 ] . "B") 8 ] . "\n" . \
      [ $FormatLine "free" ([ $HumanReadableNum ($Resource->"free-memory") 1024 ] . "B") 8 ]) });
    :set CheckHealthRAMUtilizationNotified true;
  }
  :if ($CheckHealthRAMUtilization < 70 && $CheckHealthRAMUtilizationNotified = true) do={
    $SendNotification2 ({ origin=$ScriptName; \
      subject=([ $SymbolForNotification "card-file-box,chart-decreasing" ] . "Health recovery: RAM utilization"); \
      message=("The RAM utilization on " . $Identity . " decreased to " . $CheckHealthRAMUtilization . "%.") });
    :set CheckHealthRAMUtilizationNotified false;
  }

  :if ([ :len [ /system/health/find ] ] = 0) do={
    $LogPrint debug $ScriptName ("Your device does not provide any health values.");
    :set ExitOK true;
    :error true;
  }

  :if ([ :typeof $CheckHealthLast ] != "array") do={
    :set CheckHealthLast ({});
  }
  :if ([ :typeof $CheckHealthTemperatureNotified ] != "array") do={
    :set CheckHealthTemperatureNotified ({});
  }


  :foreach Voltage in=[ /system/health/find where type="V" ] do={
    :local Name  [ /system/health/get $Voltage name  ];
    :local Value [ /system/health/get $Voltage value ];

    :if ([ :typeof ($CheckHealthLast->$Name) ] != "nothing") do={
      :local NumCurr [ $TempToNum $Value ];
      :local NumLast [ $TempToNum ($CheckHealthLast->$Name) ];

      :if ($NumLast * (100 + $CheckHealthVoltagePercent) < $NumCurr * 100 || \
           $NumLast * 100 > $NumCurr * (100 + $CheckHealthVoltagePercent)) do={
        $SendNotification2 ({ origin=$ScriptName; \
          subject=([ $SymbolForNotification ("high-voltage-sign,chart-" . [ $IfThenElse ($NumLast < \
            $NumCurr) "in" "de" ] . "creasing") ] . "Health warning: " . $Name); \
          message=("The " . $Name . " on " . $Identity . " jumped more than " . $CheckHealthVoltagePercent . "%.\n\n" . \
            [ $FormatLine "old value" ($CheckHealthLast->$Name . " V") 12 ] . "\n" . \
            [ $FormatLine "new value" ($Value . " V") 12 ]) });
      } else={ 
        :if ($NumCurr <= $CheckHealthVoltageLow && $NumLast > $CheckHealthVoltageLow) do={ 
          $SendNotification2 ({ origin=$ScriptName; \ 
            subject=([ $SymbolForNotification "high-voltage-sign,chart-decreasing" ] . "Health warning: Low " . $Name); \ 
            message=("The " . $Name . " on " . $Identity . " dropped to " . $Value . " V below hard limit.") }); 
        } 
        :if ($NumCurr > $CheckHealthVoltageLow && $NumLast <= $CheckHealthVoltageLow) do={ 
          $SendNotification2 ({ origin=$ScriptName; \ 
            subject=([ $SymbolForNotification "high-voltage-sign,chart-increasing" ] . "Health recovery: Low " . $Name); \ 
            message=("The " . $Name . " on " . $Identity . " recovered to " . $Value . " V above hard limit.") }); 
        }
      }
    }
    :set ($CheckHealthLast->$Name) $Value;
  }

  :foreach PSU in=[ /system/health/find where name~"^psu.*-state\$" ] do={
    :local Name  [ /system/health/get $PSU name  ];
    :local Value [ /system/health/get $PSU value ];

    :if ([ :typeof ($CheckHealthLast->$Name) ] != "nothing") do={
      :if ($CheckHealthLast->$Name = "ok" && \
           $Value != "ok") do={
        $SendNotification2 ({ origin=$ScriptName; \
          subject=([ $SymbolForNotification "cross-mark" ] . "Health warning: " . $Name); \
          message=("The power supply unit '" . $Name . "' on " . $Identity . " failed!") });
      }
      :if ($CheckHealthLast->$Name != "ok" && \
           $Value = "ok") do={
        $SendNotification2 ({ origin=$ScriptName; \
          subject=([ $SymbolForNotification "white-heavy-check-mark" ] . "Health recovery: " . $Name); \
          message=("The power supply unit '" . $Name . "' on " . $Identity . " recovered!") });
      }
    }
    :set ($CheckHealthLast->$Name) $Value;
  }

  :foreach Temperature in=[ /system/health/find where type="C" ] do={
    :local Name  [ /system/health/get $Temperature name  ];
    :local Value [ /system/health/get $Temperature value ];

    :if ([ :typeof ($CheckHealthLast->$Name) ] != "nothing") do={
      :if ([ :typeof ($CheckHealthTemperature->$Name) ] != "num" ) do={
        $LogPrint info $ScriptName ("No threshold given for " . $Name . ", assuming 50C.");
        :set ($CheckHealthTemperature->$Name) 50;
      }
      :local Validate [ /system/health/get [ find where name=$Name ] value ];
      :while ($Value != $Validate) do={
        :set Value $Validate;
        :set Validate [ /system/health/get [ find where name=$Name ] value ];
      }
      :if ($Value > $CheckHealthTemperature->$Name && \
           $CheckHealthTemperatureNotified->$Name != true) do={
        $SendNotification2 ({ origin=$ScriptName; \
          subject=([ $SymbolForNotification "fire" ] . "Health warning: " . $Name); \
          message=("The " . $Name . " on " . $Identity . " is above threshold: " . \
            $Value . "\C2\B0" . "C") });
        :set ($CheckHealthTemperatureNotified->$Name) true;
      }
      :if ($Value <= ($CheckHealthTemperature->$Name - $CheckHealthTemperatureDeviation) && \
           $CheckHealthTemperatureNotified->$Name = true) do={
        $SendNotification2 ({ origin=$ScriptName; \
          subject=([ $SymbolForNotification "white-heavy-check-mark" ] . "Health recovery: " . $Name); \
          message=("The " . $Name . " on " . $Identity . " dropped below threshold: " .  \
            $Value . "\C2\B0" . "C") });
        :set ($CheckHealthTemperatureNotified->$Name) false;
      }
    }
    :set ($CheckHealthLast->$Name) $Value;
  }
} on-error={
  :global ExitError; $ExitError $ExitOK [ :jobname ];
}