Nagios - Notify by Telegram

commands.cfg

# 'notify-host-by-telegram' command definition
define command {
    command_name notify-host-by-telegram
    command_line notify-by-telegram -t"[TOKEN]" -c"[CHAT ID]" -m"***** Nagios Host *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n"
}

# 'notify-service-by-telegram' command definition
define command {
    command_name notify-service-by-telegram
    command_line notify-by-telegram -t"[TOKEN]" -c"[CHAT ID]" -m"***** Nagios Service *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$\n"
}

notify-by-telegram.py

#!/usr/bin/env python3

import requests
import argparse
import sys

parser = argparse.ArgumentParser()
requiredNamed = parser.add_argument_group('required named arguments')
requiredNamed.add_argument('-t', '--token', required=True)
requiredNamed.add_argument('-c', '--chatid', required=True)
requiredNamed.add_argument('-m', '--message', required=True)
parser.add_argument('-v', '--verbose', action='store_true', help='print stdout')
parser.add_argument('-s', '--silent', action='store_true', help='suppress stderr')
parser.add_argument('-M', '--markdown', action='store_true', help='enable markdown in message')
args = parser.parse_args()

token = args.token
chat_id = args.chatid
message = args.message.replace('\\n', '\n')
verbose = args.verbose
silent = args.silent
markdown = args.markdown

if markdown:
    parse_mode = 'MarkdownV2'
else:
    parse_mode = None

data = {
    'chat_id': chat_id,
    'text': message,
    'parse_mode': parse_mode
}

url = f'https://api.telegram.org/bot{token}/sendmessage'

r = requests.post(url, data)

telegram_status = r.json()

if r.status_code is requests.codes.ok:
    if verbose:
        print(f'Telegram sent:\n{telegram_status}')
else:
    if not silent:
        print(
            f'Telegram failed:\n{telegram_status}',
            file=sys.stderr
        )
    sys.exit(1)