getwork-monitor-eth-parity.sh

getwork-monitor-eth-parity.sh

#!/bin/bash
#
# Parity's getwork RPC is often stuck in a block number
# So I wrote a script to monitor and automatically restart it
#
# @copyright btc.com
# @author Yihao Peng <yihao.peng@bitmain.com>
# @since 2018-07
# 
# bash /work/script/getwork-monitor-eth-parity.sh >>/work/script/logs/getwork-monitor-eth-parity.log 2>&1
#
SROOT=$(cd $(dirname "$0"); pwd)
cd $SROOT

# parity docker name
DOCKER_NAME="eth-parity"
# parity RPC URL
RPC_URL="http://localhost:8545/"

#################################

blockNumber=`curl -s -S --max-time 5 --data-binary '{"jsonrpc": "2.0", "method": "eth_blockNumber", "params": [], "id": 1}' -H 'content-type: application/json' "$RPC_URL" 2>/dev/null | jq -r '.result'`
let blockNumber=$blockNumber

getWorkNumber=`curl -s -S --max-time 5 --data-binary '{"jsonrpc": "2.0", "method": "eth_getWork", "params": [], "id": 1}' -H 'content-type: application/json' "$RPC_URL" 2>/dev/null | jq -r '.result[3]'`
let getWorkNumber=$getWorkNumber

if [ "$getWorkNumber" = "0" ]; then
    echo "$DOCKER_NAME still sync... blockNumber: $blockNumber, getworkNumber: $getWorkNumber"
    exit 1
fi

let diff=$blockNumber-$getWorkNumber

DATE=`date "+%Y-%m-%d %H:%M:%S"`

if [ $diff -ge 5 ]; then
    echo "[$DATE] getwork stuck: blockNumber: $blockNumber, getworkNumber: $getWorkNumber, diff: $diff"
    echo -n "[$DATE] docker restarted: "
    docker restart "$DOCKER_NAME"
fi