Failover script (original by jesta) modified to use telegram to notify you.

witnessfailover.py

import os
import sys
import time
from piston.steem import Steem
from pprint import pprint
from steemtools.experimental import Transactions

# Steem connection and witness information
node    = os.environ['steem_node']
witness = os.environ['steem_account']
wif     = os.environ['steem_wif']


telegram_token = os.environ['feed_telegram_token']
telegram_id    = os.environ['feed_telegram_id']

# Get your telegram id with the bot: MyTelegramID_bot
# setup a telegram bot (for the token) with bot: BotFather

def telegram(method, params=None):
    url = "https://api.telegram.org/bot"+telegram_token+"/"
    params = params
    r = requests.get(url+method, params = params).json()
    return r



# Establish the connection to steem
steem = Steem(node=node, keys=[wif])

# How many misses before we trigger the update, 0 for debugging (always trigger)
threshold = int(os.environ['threshold'])

# How often should we check for misses? (in seconds)
check_rate = int(os.environ['check_rate'])

# The signing key to swap to when the threshold is met
backup_key = os.environ['steem_backup']

# Properties to set on the witness update
props = {
    "account_creation_fee": os.environ['steem_account_creation_fee'],
    "maximum_block_size": int(os.environ['steem_maximum_block_size']),
    "sbd_interest_rate": int(os.environ['steem_sbd_interest_rate']),
}
witness_url = os.environ['steem_witness_url']

# Check how many blocks a witness has missed
def check_witness():
    status = steem.rpc.get_witness_by_account(witness)
    missed = status['total_missed']
    pprint("Missed = " + str(missed) + " | Failover if >= " + str(threshold) + " | Next Key: " + backup_key)
    if missed >= threshold:
        update_witness(witness, witness_url, backup_key, props)

# Update the witness to the new signing key
def update_witness(account, url, signing_key, props):
    # Create the witness_update transaction and broadcast
    t = Transactions(steem=steem)
    tx = t.witness_update(witness, backup_key, witness_url, props, wif, sim_mode=False)
    # Send SMS Notification of Failure
    custom_keyboard = [["shit hit fan!"]]
    reply_markup = json.dumps({"keyboard":custom_keyboard, "resize_keyboard": True})
    conf_msg = ("ALERT! ALERT! SWITCHED FROM WITNESS TO BACKUPNODE! GA DIE SHIT FIXEN")
    payload = {"chat_id":telegram_id, "text":conf_msg, "reply_markup":reply_markup}
    m = telegram("sendMessage", payload)
    # Kill the script
    raise SystemExit

# Main Loop
if __name__ == '__main__':
    while True:
        check_witness()
        sys.stdout.flush()
        time.sleep(check_rate)