Set Daemon For Geth

As sometimes , geth process will be killed by VPS system ,so we need to set daemon for geth processed.It's easy and suitable to set daemon in Linux OS, you may use supervisor,(http://supervisord.org).

• We assume the source code go-etherzero is in directory /root amd geth is running by root user.

• Write daemon.sh

• CAUTION: you must replace the words 'your address' to your own rewards address.

cat << EOF > /root/daemon.sh
#!/bin/bash
source /etc/profile
source ~/.bashrc
jspid="ps aux | grep maxpeers | grep -v grep | awk '{print $2}'"
echo $jspid
if [ -z "\$jspid" ] ; then
echo $jspid
nohup ~/go-etherzero/build/bin/geth  --maxpeers 50  --syncmode fast --masternode --etherbase "your address"  > output.log 2>&1 &
else
echo  "run normaly"
fi
EOF

• Generating the miner.sh

echo -e " ~/go-etherzero/build/bin/geth attach --exec 'miner.start()' " > /root/miner.sh && chmod +x  /root/miner.sh

• set daemon.sh and miner.sh for execute miner start each minute

( crontab -l | { cat; echo "*/1 * * * * /bin/bash /root/daemon.sh & "; } ) | crontab -  &&  ( crontab -l | { cat; echo "*/1 * * * * /bin/bash /root/miner.sh & "; } ) | crontab -

• As the crontab is running by every minute ,so we need to set another shell script for each seconds to monitor the process,

• Generating the second.sh.

#!/bin/bash
step=1  #time step for damon.sh 
for ((i=0;i<60;i=(i+step)));do	
    /usr/bin/bash /root/damon.sh &
    sleep $step
done
exit 0

• Add second.sh instead of daemon.sh, to monitor geth process every one second

( crontab -l | { cat; echo "*/1 * * * * /bin/bash /root/second.sh & "; } ) | crontab - && chmod +x /root/second.sh