added support for telegram notifications

templates/telegram-bot.py.j2

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+import os
+import sys
+from dateutil import parser
+import telegram, json, logging
+from flask import Flask, request
+
+listenPort = 29119
+listenIP = '::1'
+botToken = '{{ prometheus_alertmanager.telegrambot }}'
+
+app = Flask(__name__)
+app.secret_key = os.urandom(128)
+
+bot = telegram.Bot(token=botToken)
+
+@app.route('/<chatID>/alert', methods = ['POST'])
+def postAlertmanager(chatID):
+
+	try:
+		content = json.loads(request.get_data())
+		for alert in content['alerts']:
+			message = "Status: "+alert['status']+"\n"
+			if 'name' in alert['labels']:
+				message += "Instance: "+alert['labels']['instance']+"("+alert['labels']['name']+")\n"
+			else:
+				message += "Instance: "+alert['labels']['instance']+"\n"
+			if 'info' in alert['annotations']:
+				message += "Info: "+alert['annotations']['info']+"\n"
+			if 'summary' in alert['annotations']:
+				message += "Summary: "+alert['annotations']['summary']+"\n"
+			if 'description' in alert['annotations']:
+				message += "Description: "+alert['annotations']['description']+"\n"
+			if alert['status'] == "resolved":
+				correctDate = parser.parse(alert['endsAt']).strftime('%Y-%m-%d %H:%M:%S')
+				message += "Resolved: "+correctDate
+			elif alert['status'] == "firing":
+				correctDate = parser.parse(alert['startsAt']).strftime('%Y-%m-%d %H:%M:%S')
+				message += "Started: "+correctDate
+			bot.sendMessage(chat_id=chatID, text=message)
+			return "Alert OK", 200
+	except Exception as error:	   
+		bot.sendMessage(chat_id=chatID, text="Error to read json: "+str(error))
+		app.logger.info("\t%s",error)
+		return "Alert fail", 200
+
+if __name__ == '__main__':
+	if len(sys.argv) == 1:
+		logging.basicConfig(level=logging.INFO)
+		app.run(host=listenIP, port=listenPort)
+	else:
+		from gevent.pywsgi import WSGIServer
+		http_server = WSGIServer((listenIP, listenPort), app)
+		http_server.serve_forever()