RAM integration

script.sh

@@ -4,6 +4,8 @@ printf "Better to run as root, because of permisions handeling.\n"
 
 sleep 2
 
+### Firewall ###
+
 printf "Do you want to set up firewall rules by iptables? [Y/n]: \n"
 read ansFirewallSetup
 
@@ -48,15 +50,68 @@ else
 	fi
 fi
 
+### RAM ###
+
+printf "How much of RAM are you willing to allocate in GB (Max) [4G/?G]: \n"
+read maxRam
+
+printf "How little you want to let RAM go down to in GB (Min) [1G/?G]: \n"
+read minRam
+
+if [[ "$minRam" > "$maxRam" ]]; then
+	pritf "\n You allocated too low max ram or too much min ram. Manual intervention at the end will be needed\n"
+	echo "-Xmx?G # in place of ? put number of RAM you want to set ass maximum"
+	$maxRam="Error"
+elif [[ "$maxRam" =~ ("G"|"M") ]]; then
+	printf "\n+ Allocating $maxRam as RAM maximum."
+	echo "-Xmx$maxRam" >> data/user_jvm_args.txt
+elif [[ -z $maxRam ]]; then
+	$maxRam=4G
+	printf "\n+ Allocating $MaxRam as RAM maximum"
+	echo "-Xmx$maxRam" >> data/user_jvm_args.txt
+elif [[ ! "$maxRam" =~ ("G"|"MB") ]]; then
+	printf "\n+ Allocating ${maxRam}G as RAM maximum"
+	echo "-Xmx${maxRam}G" >> data/user_jvm_args.txt
+else
+	pritnf "\n \n!!! Sorry I have no idea what are you trying to do :/ Manual intervention will be needed at the end \n"
+	$maxRam="Error"
+	echo "-Xmx?G # in place of ? put number of RAM you want to set ass maximum"
+
+fi
+
+
+if [[ "$minRam" > "$maxRam" ]]; then
+	echo "-Xms?G # in place of ? put number of RAM you want to se ass minimum"
+elif [[ "$minRam" =~ ("G"|"M") ]]; then
+	printf "\n+ Allocating $minRam as RAM minimum."
+	echo "-Xms$minRam" >> data/user_jvm_args.txt
+elif [[ -z $minRam ]]; then
+	$minRam=1G
+	printf "\n+ Allocating $minRam as RAM minimum"
+	echo "-Xms$minRam" >> data/user_jvm_args.txt
+elif [[ ! "$minRam" =~ ("G"|"MB") ]]; then
+	printf "Allocating ${minRam}G as RAM maximum"
+	echo "-Xms${minRam}G" >> data/user_jvm_args.txt
+else
+	pritnf "\n!!! Sorry I have no idea what are you trying to do :/ Manual intervention will be needed at the end \n"
+	$minRam="Error"
+	echo "-Xms?G # in place of ? put number of RAM you want to set ass minimum"
+fi
+
+
+
+
 sleep 2
 
-# Just to be shure
+### Update ###
+
 printf "\n+ Starting to upgrade base system\n\n"
 
 sudo apt update
 sudo apt upgrade -y
 
-# Installing depandencies
+### Installing depandencies ###
+
 printf "\n+ Installing depandencies \n\n" 
 sudo apt install openjdk-17-jre-headless screen p7zip-full -y
 
@@ -66,20 +121,20 @@ if [[ "$ansFirewallSetup" =~ ("Y"|"y") || -z $ansFirewallSetup  ]]; then
 
 fi
 
-# User and groupe managment
+### User and groupe managment ###
 printf "\n+ Creating user minecraft and basic file structure"
 groupadd minecraft
 
 useradd --system --shell /usr/sbin/nologin --home /opt/minecraft -g minecraft minecraft
 
-# File strukture and basic install
+###  File strukture ###
 mkdir /opt/minecraft 
 
 mv data/Forge-1.20.1.jar /opt/minecraft/
 
 cd /opt/minecraft/
 
-# Installing server
+### Installing server ###
 printf "+ Installing Forge 1.20.1 \n \n"
 
 java -Xms512M -Xmx2048M -jar Forge-1.20.1.jar --installServer
@@ -98,20 +153,17 @@ cd data
 7z x Mods.zip -o/opt/minecraft/mods/
 cd ..
 
-# Permision handeling 
+### Permisions ###
 printf "\n+ Permision handeling\n"
 chown -R minecraft:minecraft /opt/minecraft
 
-# SystemD service
+### SystemD service ###
 printf "+ Preparign systemD service\n"
 mv data/mc-forge.service /etc/systemd/system/
 
 systemctl daemon-reload
-systemctl start mc-forge.service
-systemctl enable mc-forge
 
-
+### integration of Maxopoly's instructions on firewall ###
-# integration of Maxopoly's instructions on firewall
 
 if [[ "$ansFirewallSetup" =~ ("Y"|"y") || -z "$ansFirewallSetup" ]]; then
 	
@@ -148,9 +200,17 @@ if [[ "$ansFirewallSetup" =~ ("Y"|"y") || -z "$ansFirewallSetup" ]]; then
 			printf "\nAfter you are done ramamber to run 'apt install iptables-persistent' to save your config. System will automaticly remove your work after restart"
 
 		fi
+fi
+  ### Error handeling ###
+if [[ "$minRam" = "Error" || "$maxRam" = "Error" ]]; then
 
+	printf "\n Encountred some eror in Ram settings"
+	pritnf "\n Manual configuration needed" 
+	printf "\n Open /opt/minecraft/user_jvm_args.txt in your favorite editor. File contains more instructions"
 
-
+else
+	systemctl start mc-forge.service
+	systemctl enable mc-forge
 fi
 
 printf "\n+ Done, thanks for your time. It is goode idea to chack if everythink is alright by running:"