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#!/usr/bin/env python3
###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) #
# and others #
# #
# All rights reserved. This program and the accompanying materials #
# are made available under the terms of the Apache License, Version 2.0 #
# which accompanies this distribution, and is available at #
# http://www.apache.org/licenses/LICENSE-2.0 #
###############################################################################
# handle monitoring events
import argparse
import datetime
import json
import sys
from discover.configuration import Configuration
from monitoring.handlers.monitoring_check_handler import MonitoringCheckHandler
from utils.inventory_mgr import InventoryMgr
from utils.mongo_access import MongoAccess
from utils.special_char_converter import SpecialCharConverter
from utils.util import ClassResolver
class Monitor:
DEFAULTS = {
'env': 'WebEX-Mirantis@Cisco',
'inventory': 'inventory',
'loglevel': 'WARNING'
}
def __init__(self):
self.args = self.get_args()
MongoAccess.set_config_file(self.args.mongo_config)
self.inv = InventoryMgr()
self.inv.set_collections(self.args.inventory)
self.configuration = Configuration()
self.input_text = None
self.converter = SpecialCharConverter()
def get_args(self):
parser = argparse.ArgumentParser()
parser.add_argument("-m", "--mongo_config", nargs="?", type=str,
default="",
help="name of config file with MongoDB server " +
"access details")
parser.add_argument("-e", "--env", nargs="?", type=str,
default=self.DEFAULTS['env'],
help="name of environment to scan \n" +
"(default: {})".format(self.DEFAULTS['env']))
parser.add_argument("-y", "--inventory", nargs="?", type=str,
default=self.DEFAULTS['inventory'],
help="name of inventory collection \n" +
"(default: {}".format(self.DEFAULTS['inventory']))
parser.add_argument('-i', '--inputfile', nargs='?', type=str,
default='',
help="read input from the specifed file \n" +
"(default: from stdin)")
parser.add_argument("-l", "--loglevel", nargs="?", type=str,
default=self.DEFAULTS["loglevel"],
help="logging level \n(default: '{}')"
.format(self.DEFAULTS["loglevel"]))
args = parser.parse_args()
return args
def get_type_list(self, type_name) -> list:
types_list = []
docs = self.inv.find_items({'name': type_name}, collection='constants')
for types_list in docs:
types_list = [t['value'] for t in types_list['data']]
if not types_list:
raise ValueError('Unable to fetch {}'
.format(type_name.replace('_', ' ')))
return types_list
def match_object_types(self, check_name: str) -> list:
object_types = self.get_type_list('object_types')
matches = [t for t in object_types if check_name.startswith(t + '_')]
return matches
def match_link_types(self, check_name: str) -> list:
object_types = self.get_type_list('link_types')
matches = [t for t in object_types
if check_name.startswith('link_' + t + '_')]
return matches
def find_object_type_and_id(self, check_name: str):
# if we have multiple matching host types, then take the longest
# of these. For example, if matches are ['host', 'host_pnic'],
# then take 'host_pnic'.
# To facilitate this, we sort the matches by reverse order.
is_link_check = check_name.startswith('link_')
check_type = 'link' if is_link_check else 'object'
if is_link_check:
matching_types = sorted(self.match_link_types(check_name),
reverse=True)
else:
matching_types = sorted(self.match_object_types(check_name),
reverse=True)
if not matching_types:
raise ValueError('Unable to match check name "{}" with {} type'
.format(check_name, check_type))
obj_type = matching_types[0]
postfix_len = len('link_') if is_link_check else 0
obj_id = (obj_type + '_' if is_link_check else '') + \
check_name[len(obj_type)+1+postfix_len:]
return check_type, obj_type, obj_id
def read_input(self):
if self.args.inputfile:
try:
with open(self.args.inputfile, 'r') as input_file:
self.input_text = input_file.read()
except Exception as e:
raise FileNotFoundError("failed to open input file {}: {}"
.format(self.args.inputfile, str(e)))
else:
self.input_text = sys.stdin.read()
if not self.input_text:
raise ValueError("No input provided on stdin")
def get_handler_by_type(self, check_type, obj_type):
module_name = 'handle_link' if check_type == 'link' \
else 'handle_' + obj_type
package = 'monitoring.handlers'
handler = ClassResolver.get_instance_single_arg(self.args,
module_name=module_name,
package_name=package)
return handler
def get_handler(self, check_type, obj_type):
basic_handling_types = ['instance', 'vedge', 'vservice', 'vconnector']
if obj_type not in basic_handling_types:
return self.get_handler_by_type(check_type, obj_type)
from monitoring.handlers.basic_check_handler \
import BasicCheckHandler
return BasicCheckHandler(self.args)
def check_link_interdependency_for(self,
object_id: str,
from_type: str=None,
to_type: str=None):
if from_type is not None and to_type is not None or \
from_type is None and to_type is None:
raise ValueError('check_link_interdependency: '
'supply one of from_type/to_type')
obj_id = self.converter.decode_special_characters(object_id)
obj = self.inv.get_by_id(environment=self.args.env, item_id=obj_id)
if not obj:
self.inv.log.error('check_link_interdependency: '
'failed to find object with ID: {}'
.format(object_id))
return
if 'status' not in obj:
return
id_attr = 'source_id' if from_type is None else 'target_id'
link_type = '{}-{}'.format(
from_type if from_type is not None else obj['type'],
to_type if to_type is not None else obj['type'])
condition = {
'environment': self.args.env,
'link_type': link_type,
id_attr: obj_id
}
link = self.inv.find_one(search=condition, collection='links')
if not link:
self.inv.log.error('check_link_interdependency: '
'failed to find {} link with {}: {}'
.format(link_type, id_attr, obj_id))
return
other_id_attr = '{}_id' \
.format('source' if from_type is not None else 'target')
other_obj = self.inv.get_by_id(environment=self.args.env,
item_id=link[other_id_attr])
if not other_obj:
self.inv.log.error('check_link_interdependency: '
'failed to find {} with ID: {} (link type: {})'
.format(other_id_attr, link[other_id_attr],
link_type))
return
if 'status' not in other_obj:
return
status = 'Warning'
if obj['status'] == 'OK' and other_obj['status'] == 'OK':
status = 'OK'
elif obj['status'] == 'OK' and other_obj['status'] == 'OK':
status = 'OK'
link['status'] = status
time_format = MonitoringCheckHandler.TIME_FORMAT
timestamp1 = obj['status_timestamp']
t1 = datetime.datetime.strptime(timestamp1, time_format)
timestamp2 = other_obj['status_timestamp']
t2 = datetime.datetime.strptime(timestamp2, time_format)
timestamp = max(t1, t2)
link['status_timestamp'] = datetime.datetime.strftime(timestamp,
time_format)
self.inv.set(link, self.inv.collections['links'])
def check_link_interdependency(self, object_id: str, object_type: str):
conf = self.configuration.get_env_config()
if 'OVS' in conf['mechanism_drivers']:
if object_type == 'vedge':
self.check_link_interdependency_for(object_id,
to_type='host_pnic')
if object_type == 'host_pnic':
self.check_link_interdependency_for(object_id,
from_type='vedge')
def process_input(self):
check_result_full = json.loads(self.input_text)
check_client = check_result_full['client']
check_result = check_result_full['check']
check_result['id'] = check_result_full['id']
name = check_result['name']
check_type, object_type, object_id = \
monitor.find_object_type_and_id(name)
if 'environment' in check_client:
self.args.env = check_client['environment']
else:
raise ValueError('Check client should contain environment name')
self.configuration.use_env(self.args.env)
check_handler = self.get_handler(check_type, object_type)
if check_handler:
check_handler.handle(object_id, check_result)
self.check_link_interdependency(object_id, object_type)
def process_check_result(self):
self.read_input()
self.process_input()
monitor = Monitor()
monitor.process_check_result()
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