setup.sh

#!/bin/bash
#
# https://github.com/theroyalstudent/setupSimpleSyncthingRelay
#

clear

echo ""
echo "=================================================================="
echo "Simple Syncthing Relay Setup Script by @theroyalstudent (Edwin A.)"
echo "============ [ GitHub Source: https://git.io/vr2xt ] ============="
echo "=================================================================="
echo ""

if [[ $EUID -ne 0 ]]; then
	echo ""
	echo "You must be a root user" 2>&1
	exit 1
fi

echo "Deleting old data and making sure no Syncthing Relay is running..."

killall relaysrv &> /dev/null
rm -rf /tmp/strelaysrv*.tar.gz /etc/relaysrv /home/relaysrv /usr/local/bin/relaysrv /etc/supervisor/conf.d/syncthingRelay.conf &> /dev/null
userdel relaysrv &> /dev/null

# input relay name
echo ""
read -rp "Please enter a relay name: " -e -i @ relayName

echo "You have entered '$relayName' as a relay name."

delimiter=' - '

if [ -z "$relayName" ]; then
	delimiter=''
fi

# autodetect/input server geolocation
serverIPgeolocation="$(wget ipinfo.io/city -qO -), $(wget ipinfo.io/country -qO -)"

echo ""
echo "Your server IP geolocation is $serverIPgeolocation"
read -rp "Is this correct? [Y/n]: " -e -i y serverIPverification

if [[ "$serverIPverification" == [Nn] ]]; then
	read -rp "Enter correct/preferred name: " serverIPgeolocation
elif [[ "$serverIPverification" == [Yy] ]] || [[ -z "$serverIPverification" ]]; then
	echo "Nice, proceeding."
else
	echo "User has not entered a valid response, unable to determine if autodetected location is accurate."
	echo "Exiting."
	exit 0;
fi

# inform user on relay name
displayName="$relayName$delimiter$serverIPgeolocation"

echo ""
echo "Thus, on the Syncthing Relay page at relays.syncthing.net, it will show as:"
echo "$(tput setaf 2)$displayName$(tput sgr0)"

# detect if user is behind a NAT
internalIP=$(ip addr | grep 'inet' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | grep -o -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | head -1)
externalIP=$(wget -qO- ipv4.icanhazip.com)

if [[ $internalIP == "$externalIP" ]]; then
	nat="no"
else
	nat="yes"
fi

if [[ "$nat" == "yes" ]]; then
	echo ""
	echo "On commercial NAT VPS services like LowEndSpirit, the last octet of your local network would usually determine the ports open to you."
	echo ""
	echo "If the last octet of your IP is xxx, then expect ports from xxx01 to xxx20 to be open to you."
	echo ""

	echo "Here is your external IPv4 address:"
	echo "$externalIP"
	echo ""

	echo "Here is your internal IPv4 address:"
	echo "$internalIP"
	echo ""

	read -rp 'Enter port for daemon: ' daemonPort
	echo "You have entered port $daemonPort as the port for the Syncthing relay daemon to listen on."

	echo ""

	read -rp 'Enter port for status: ' statusPort
	echo "You have entered port $statusPort as the port for the Syncthing relay status to listen on."
	echo ""

	extDaemonPort="$externalIP:$daemonPort"
elif [[ "$nat" == "no" ]] || [[ -z "$nat" ]]; then
	echo ""
	echo "Assuming that ports 22067 (daemon) and 22068 (status) are readily available for usage."
	echo ""
	sleep 1

	daemonPort=22067
	extDaemonPort="$externalIP:$daemonPort"
	statusPort=22068
else
	echo "User has not entered a valid response, unable to determine the ports to listen on."
	echo "Exiting."
	exit 0;
fi

# start setup process
# Check if supervisor is installed first
defaultConfPath="/etc/supervisor/conf.d/syncthingRelay.conf"
supConfPath="$defaultConfPath"
newInstall=false

if [[ ! -e /usr/bin/supervisord ]]; then
	newInstall=true
	YUM_CMD=$(which yum)
	APT_GET_CMD="/usr/bin/apt-get"
	# detecting apt-get/yum
	if [[ ! -z $YUM_CMD ]]; then
		echo -n "Updating yum repositories..."
		yum update-minimal --security -y &>/dev/null
		echo "  $(tput setaf 2)DONE$(tput sgr0)"
		echo ""
		echo -n "Installing sed, sudo and python-setuptools..."
		yum install sed sudo python-setuptools -y &> /dev/null
		echo "  $(tput setaf 2)DONE$(tput sgr0)"

		echo -n "Downloading supervisor..."
		cd /tmp
		wget -q "https://pypi.python.org/packages/80/37/964c0d53cbd328796b1aeb7abea4c0f7b0e8c7197ea9b0b9967b7d004def/supervisor-3.3.1.tar.gz"
		echo "  $(tput setaf 2)DONE$(tput sgr0)"
		#Extracting...
		tar -xzf supervisor-3.3.1.tar.gz
		echo -n "Building supervisor..."
		cd supervisor-3.3.1
		python setup.py install &> /dev/null
		echo "  $(tput setaf 2)DONE$(tput sgr0)"
		# deleteing supervisor unneccessary files
		cd /tmp
		rm -rf supervisor*

		#Setup startup
		init=`cat /proc/1/comm`
		if [[ "$init" == 'systemd' ]]; then
			wget -q "https://raw.githubusercontent.com/theroyalstudent/setupSimpleSyncthingRelay/master/etc/supervisord.service" -O "/etc/systemd/system/supervisord.service"
			systemctl enable supervisord
			echo_supervisord_conf > /etc/supervisord.conf
		else
			wget -q "https://raw.githubusercontent.com/theroyalstudent/setupSimpleSyncthingRelay/master/etc/supervisord-yum.sh" -O "/etc/rc.d/init.d/supervisord"
			chmod +x /etc/rc.d/init.d/supervisord
			echo_supervisord_conf > /etc/supervisord.conf
			chkconfig --add supervisord
			chkconfig supervisord on
		fi
	elif [[ ! -z $APT_GET_CMD ]]; then
		echo -n "Updating apt repositories..."
		apt-get update -y &>/dev/null
		echo "  $(tput setaf 2)DONE$(tput sgr0)"
		echo ""
		echo -n "Installing packages: sed, sudo, supervisor if not installed yet..."
		apt-get install sed sudo supervisor -y &>/dev/null
		echo "  $(tput setaf 2)DONE$(tput sgr0)"
		echo_supervisord_conf > /etc/supervisord.conf
	else
		echo ""
		echo "unsupported or unknown architecture"
		echo ""
		exit;
	fi
		mkdir -p /var/run/supervisord/
		mkdir -p /etc/supervisor/conf.d
		# Modify it to include from conf.d by default
		sed -i "s/\;\[include\]/[include]/" /etc/supervisord.conf
		sed -i "s/\;files.*/files = \/etc\/supervisor\/conf.d\/*.conf/" /etc/supervisord.conf
		sleep 2
		service supervisord start
fi

# detect architecture
if uname -m | grep -q 64; then
	cpubits="linux-amd64"
	cpubitsname="for your 64-bit Linux system..."
elif uname -m | grep -q 86; then
	cpubits="linux-386"
	cpubitsname="for 32-bit Linux system..."
elif uname -m | grep -q "armv"; then
	cpubits="linux-arm"
	cpubitsname="for ARM Linux system..."
else
	echo "unsupported or unknown architecture"
	echo ""
	exit;
fi

echo ""
echo -n "Downloading latest release of the relaysrv daemon $cpubitsname"
cd /tmp || exit
wget "$(wget https://api.github.com/repos/syncthing/relaysrv/releases/latest -qO - | grep 'browser_' | grep $cpubits | cut -d\" -f4)" &>/dev/null
echo "  $(tput setaf 2)DONE$(tput sgr0)"

echo ""
echo -n "Extracting the relaysrv daemon..."
tar xzf strelaysrv-linux*.tar.gz
echo "  $(tput setaf 2)DONE$(tput sgr0)"

echo ""
echo -n "Moving the relaysrv daemon to /usr/local/bin..."
cd strelaysrv-linux*
mv strelaysrv /usr/local/bin/relaysrv
echo "  $(tput setaf 2)DONE$(tput sgr0)"

echo ""
echo -n "Clearing up the remains of the relaysrv daemon..."
cd /tmp
rm -rf strelaysrv-linux*.tar.gz
echo "  $(tput setaf 2)DONE$(tput sgr0)"

# add user for relayserv
echo ""
echo -n "Adding a user for relaysrv, called relaysrv."
mkdir /etc/relaysrv
useradd -r -d /etc/relaysrv -s /bin/bash relaysrv &> /dev/null
chown -R relaysrv /etc/relaysrv
touch /etc/relaysrv/syncthingRelay.log

# download relay config
echo ""
echo -n "Copying Syncthing Relay supervisord configuration to the respective folder..."
if wget -q "https://raw.githubusercontent.com/theroyalstudent/setupSimpleSyncthingRelay/master/syncthingRelay.conf" -O "$supConfPath"; then
	echo "  $(tput setaf 2)DONE$(tput sgr0)"
else
	echo "  $(tput setaf 1)FAILED$(tput sgr0)"
	echo ""
	echo "Exiting."
	echo ""
	exit;
fi

echo ""
echo -n "Setting name of the Syncthing relay..."
sed -i s/RELAYNAME/"$displayName"/ $supConfPath
echo "  $(tput setaf 2)DONE$(tput sgr0)"

echo ""
echo -n "Setting ports for the Syncthing relay to listen on..."

sed -i s/daemonPort/":$daemonPort"/ $supConfPath
sed -i s/extDaemonPort/"$extDaemonPort"/ $supConfPath
sed -i s/statusPort/"$statusPort"/ $supConfPath

echo " $(tput setaf 2)DONE$(tput sgr0)"

echo ""
echo "Restarting supervisord..."
echo ""
# Restarting supervisord also kills any running processes, which is bad
# Use supervisorctl update if supervisor was already installed
if "$newInstall" = "true"; then
	# Check for both sysvinit & systemd
	if [[ -e "/etc/rc.d/init.d/supervisord" || -e "/etc/systemd/system/supervisord.service" || -e "/usr/lib/systemd/system/supervisord.service" ]]; then
		service supervisord restart
	else
		service supervisor restart
	fi
else
	supervisorctl update
fi

#Let the supervisord stabilize
echo "We would wait few seconds to let supervisord stabilize..."
secs=$((3 * 4))
while [ $secs -gt 0 ]; do
   echo -ne "$secs\033[0K\r"
   sleep 1
   : $((secs--))
done

echo ""
supervisorctl status syncthingRelay
echo ""
echo "And you should be up and running! (http://relays.syncthing.net)"
echo "If this script worked, feel free to give my script a star!"
echo "Exiting."
echo ""
exit 0
limit in GiB."
read bwlimit

echo "bandwidthlimit=$bwlimit" > /etc/syncthing_bw.conf

line1='1 * * * * /usr/bin/bandwidth_check'
line2='0 0 1 * * /usr/bin/bandwidth_check -r'

(crontab -u root -l; echo "$line1"; echo "$line2" ) | crontab -u root -

echo ""
supervisorctl status syncthingRelay
echo ""

echo "And you should be up and running! (http://relays.syncthing.net)"
echo "If this script worked, feel free to give my script a star!"
echo "Exiting."
echo ""
exit 0