status-bot/modules/ffpb_monitoring.py

# -*- coding: utf-8 -*-
from __future__ import print_function
import willie

import shelve
import time

from ffpb import ffpb_ping, pretty_date

monitored_nodes = None

def setup(bot):
	global monitored_nodes

	# load list of monitored nodes and their last status from disk
	monitored_nodes = shelve.open('nodes.monitored', writeback=True)

def shutdown(bot):
	global monitored_nodes

	# store monitored nodes
	if not monitored_nodes is None:
		monitored_nodes.sync()
		monitored_nodes.close()
		monitored_nodes = None

@willie.module.interval(3*60)
def ffpb_monitor_ping(bot):
	"""Ping each node currently under surveillance."""

	# determine where-to to send alerts
	notify_target = bot.config.core.owner
	if (not bot.config.ffpb.msg_target is None):
		notify_target = bot.config.ffpb.msg_target

	# check each node under surveillance
	for node in monitored_nodes:
		mon = monitored_nodes[node]
		last_status = mon['status']
		last_check = mon['last_check']
		last_success = mon['last_success']

		current_status = ffpb_ping(bot=None, target_name=node)
		if current_status is None: current_status = False
		mon['status'] = current_status
		mon['last_check'] = time.time()
		if current_status == True: mon['last_success'] = time.time()
		print("Monitoring ({0}) {1} (last: {2} at {3})".format(node, current_status, last_status, time.strftime('%Y-%m-%d %H:%M', time.localtime(last_check))))
		if last_status != current_status and (last_status or current_status):
			if last_check is None:
				# erster Check, keine Ausgabe
				continue

			if current_status == True:
				bot.msg(notify_target, 'Monitoring: Knoten \'{0}\' pingt wieder (zuletzt {1})'.format(node, pretty_date(last_success) if not last_success is None else '[nie]'))
			else:
				bot.msg(notify_target, 'Monitoring: Knoten \'{0}\' DOWN'.format(node))

@willie.module.commands('monitor')
def ffpb_monitor(bot, trigger):
	"""Monitoring capability of the bot, try subcommands add, del, info and list."""

	# command is restricted to bot admins
	if not trigger.admin:
		bot.say('Ich ping hier nicht für jeden durch die Weltgeschichte.')
		return

	# ensure the user gave arguments (group 2 is the concatenation of all following groups)
	if trigger.group(2) is None or len(trigger.group(2)) == 0:
		bot.say('Das Monitoring sagt du hast doofe Ohren.')
		return

	# read additional arguments
	cmd = trigger.group(3)
	node = trigger.group(4)
	if not node is None: node = str(node)

	# subcommand 'add': add a node to monitoring
	if cmd == "add":
		if node in monitored_nodes:
			bot.say('Knoten \'{0}\' wird bereits gemonitored.'.format(node))
			return

		monitored_nodes[node] = {
			'added': trigger.sender, 
			'status': None,
			'last_check': None,
			'last_success': None,
		}

		bot.say('Knoten \'{0}\' wird jetzt ganz genau beobachtet.'.format(node))
		return

	# subcommand 'del': remote a node from monitoring
	if cmd == "del":
		if not node in monitored_nodes:
			bot.say('Knoten \'{0}\' war gar nicht im Monitoring?!?'.format(node))
			return
		del monitored_nodes[node]
		bot.say('Okidoki, \'{0}\' lasse ich jetzt links liegen.'.format(node))
		return

	# subcommand 'info': monitoring status of a node
	if cmd == "info":
		if node in monitored_nodes:
			info = monitored_nodes[node]
			bot.say('Knoten \'{0}\' wurde zuletzt {1} gepingt (Ergebnis: {2})'.format(node, pretty_date(info['last_check']) if not info['last_check'] is None else "^W noch nie", info['status']))
		else:
			bot.say('Knoten \'{0}\' ist nicht im Monitoring.'.format(node))
		return

	# subcommand 'list': enumerate all monitored nodes
	if cmd == "list":
		nodes = ""
		for node in monitored_nodes:
			nodes = nodes + " " + node
		bot.say('Monitoring aktiv für:' + nodes)
		return

	# subcommand 'help': give some hints what the user can do
	if cmd == "help":
		bot.say('Entweder "!monitor list" oder "!monitor {add|del|info} <node>"')
		return

	# no valid subcommand given: complain
	bot.say('Mit "' + str(cmd) + '" kann ich nix anfangen, probier doch mal "!monitor help".')