Script to ping mining rigs and send reboot via Empress + PushOver notification running on Raspberry Pi

miner_watchdog.sh

#!/bin/bash
# Miner Watchdog

# Miners   Name      Hostname
miners[0]="miner01;miner01.local"
miners[1]="miner02;miner02.local"
miners[2]="miner03;miner03.local"
miners[3]="miner04;miner04.local"

# How often the script checks if rig is frozen (in minutes)
freezeInterval=15

# Split miner entry into an array
parseMinerData()
{
    rig=$1
    c[0]=$(awk -F ';' '{print $1}' <<< $rig)
    c[1]=$(awk -F ';' '{print $2}' <<< $rig)

    echo ${c[@]}
}

# Function to check if miner is fozen
checkMinerFreeze()
{
    name=$1 address=$2

    if ! ping -q -c 1 -W 1 $address >/dev/null 2>&1; then
        empress -t $name -r >/dev/null 2>&1
        echo true &&
		curl -s \
          --form-string "token=*" \
          --form-string "user=*" \
          --form-string "message=Rebooting ${config[0]}" \
          https://api.pushover.net/1/messages.json >/dev/null 2>&1
    else
        echo false
    fi
}

# Convert Freeze interval from minutes to seconds
freezeInterval=$((freezeInterval * 60))
isFrozen=false

sleep 10
# Loop
while true; do

    # Check each miner
    for miner in ${miners[@]}; do
        # Miner Connection Info
        config=($(parseMinerData $miner))

        isFrozen=$(checkMinerFreeze "${config[0]}" "${config[1]}")

        echo "[$(date '+%m/%d %T')] Is ${config[0]} frozen: $isFrozen"
        $isFrozen && echo "[$(date '+%m/%d %T')] Rebooting ${config[0]}"

    done

    sleep $freezeInterval # Wait for X seconds before going to beginning of loop
done

exit 0