btcd watchdog

gistfile1.txt

#!/bin/bash

POST_INIT_SYNC_DELAY=60
POLL_DELAY=60
STALL_THRESHOLD=5

if [ -z `pidof btcd` ]; then
	echo "Starting btcd"
	nohup btcd &
	sleep $POST_INIT_SYNC_DELAY
fi

stalls=0
while true; do
	start=`btcctl --notls getinfo | jq -r .blocks`
	sleep $POLL_DELAY
	end=`btcctl --notls getinfo | jq -r .blocks`
	echo "Processed $((end - start)) blocks in the last $POLL_DELAY seconds"
	if [[ "$start" == "$end" ]]; then
		if (( stalls > STALL_THRESHOLD )); then
			echo "Too many stalls detected. Restarting btcd..."
			kill `pidof btcd`
			sleep 10
			nohup btcd &
			stalls=0
		else 
			syncnode=`btcctl --notls getpeerinfo | jq -r '.[] | select(.syncnode == true) | .addr' | cut -f1 -d:`
			if [ -z "$syncnode" ]; then
				echo "Stall detected, but no syncnode found. Restarting btcd..."
				kill `pidof btcd`
				sleep 10
				nohup btcd &
				stalls=0
			else
				echo "Stall detected! Evicting potentially bad node $syncnode"
				btcctl --notls node disconnect $syncnode
				stalls=$(( stalls + 1 ))
			fi
		fi
	fi
done	

Thank you, very helpful