Palworld - Dedicated Linux Server Scripts

check_mem_leak.sh

#Script to check for available memory
#If available memory is below certain amount, it will initiate shutdown
#The shutdown is done via rcon https://github.com/gorcon/rcon-cli
#You can get this script to be execute in crontab

#!/bin/bash

lock_file="/home/Palworld/Palworld/check_mem_leak.lock"
rcon_yaml="/home/Palworld/Palworld/rcon.yaml"
rcon="/home/Palworld/Palworld/rcon"
memAvailable=$(grep MemAvailable /proc/meminfo | awk '{print $2}')
COUNTDOWNTIME=600 # Seconds to shutdown

# If no running process
if pgrep PalServer-Linux -u $(id -un) > /dev/null 2>&1; then
    exit 0
fi

if [ -e "$lock_file" ]; then
    exit 0
fi

if [ $memAvailable -lt 1000000 ]; then
    touch "$lock_file"
    $rcon -c $rcon_yaml "Broadcast Memory_leak_threshold_has_reached"
    $rcon -c $rcon_yaml "Broadcast Restarting_server_in_$(($COUNTDOWNTIME / 60))min"

    # How many 5 minutes?
    a=$(($COUNTDOWNTIME / 300))

    while [ $a -gt 1 ]; do # We announce every 5 minutes
        # Get to the next 5 mod minutes
        if [ $(($COUNTDOWNTIME % 300)) -ne 0 ]; then
            sleep $(($COUNTDOWNTIME - ( 300 * $a )))
            COUNTDOWNTIME=$((300 * $a))
            $rcon -c $rcon_yaml "Broadcast Restarting_server_in_$(($a * 5))min"
        else
            sleep 300
            COUNTDOWNTIME=$(($COUNTDOWNTIME - 300))
            a=$(($COUNTDOWNTIME / 300))
            $rcon -c $rcon_yaml "Broadcast Restarting_server_in_$(($a * 5))min"
        fi
    done

    # How many 1 minutes?
    a=$(($COUNTDOWNTIME / 60))

    while [ $a -gt 1 ]; do # We announce every minute
        sleep 60
        COUNTDOWNTIME=$(($COUNTDOWNTIME - 60))
        a=$(($COUNTDOWNTIME / 60))
        $rcon -c $rcon_yaml "Broadcast Restarting_server_in_$(($a * 1))min"
    done

    $rcon -c $rcon_yaml "Broadcast Manual_Saving"
    $rcon -c $rcon_yaml "Save"
    sleep 28
    $rcon -c $rcon_yaml "Broadcast Initiating_Inbuilt_Auto_Shutdown"
    $rcon -c $rcon_yaml "Shutdown"

    sleep 33
    rm "$lock_file"
fi

start-server.sh

#Script to start the server in detached screen
#Require screen installed

#!/bin/bash
if ! pgrep PalServer-Linux -u $(id -un) > /dev/null 2>&1; then
	screen -d -m /home/Palworld/Palworld/wrapper.sh
else
	echo "Server already running"
fi

wrapper.sh

#Script wrapper to wrap running Palworld
#By wrapping Palworld, this script is able to know when it shut down
#It persistently keep the server running unless variable in wrapper.conf is set to true
#It also backup the save files using tar and lz4 every time it shutdown

#!/bin/bash

sed_escape() {
	sed -e 's/[]\/$*.^[]/\\&/g'
}

cfg_read() { # path, key -> value
	test -f "$1" && grep "^$(echo "$2" | sed_escape)=" "$1" | sed "s/^$(echo "$2" | sed_escape)=//" | tail -1
}

cfg_write() { # path, key, value
	cfg_delete "$1" "$2"
	echo "$2=$3" >> "$1"
}

cfg_delete() { # path, key
  test -f "$1" && sed -i "/^$(echo $2 | sed_escape).*$/d" "$1"
}

if [ ! -e "/home/Palworld/Palworld/wrapper.conf" ]; then
    touch /home/Palworld/Palworld/wrapper.conf
fi

cfg_write /home/Palworld/Palworld/wrapper.conf SHUTDOWN false

while true; do
	/home/Palworld/Palworld/PalServer.sh EpicApp=PalServer -useperfthreads -NoAsyncLoadingThread -UseMultithreadForDS -port=53021 -publicport=53021
	sleep 2

	# Make sure there's a backup directory created
	mkdir -p /home/Palworld/Palworld/Pal/Backup

	timestamp=$(date +%Y%m%d%H%M%S)
	cd "/home/Palworld/Palworld/Pal/Saved/"
	tar cf - "SaveGames" | lz4 > "/home/Palworld/Palworld/Pal/Backup/${timestamp}.tar.lz4"

	sleep 1

	echo $(cfg_read /home/Palworld/Palworld/wrapper.conf SHUTDOWN)

	# If shutdown command is issued
    	if [ "$(cfg_read /home/Palworld/Palworld/wrapper.conf SHUTDOWN)" == "true" ]; then
		break
	fi

	if pgrep PalServer-Linux -u $(id -un) > /dev/null 2>&1; then
		break
	fi
done

I use +force_install_dir to install Palworld so the directory can be different from others.