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"""MaintenanceController.""" |
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# pylint: disable=invalid-name |
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from datetime import datetime |
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import os |
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import pytz |
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from typing import Optional |
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from bson.codec_options import CodecOptions |
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import pymongo |
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from pymongo.errors import AutoReconnect, DuplicateKeyError |
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from tenacity import retry_if_exception_type, stop_after_attempt, wait_random |
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from kytos.core import log |
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from kytos.core.db import Mongo |
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from kytos.core.retry import before_sleep, for_all_methods, retries |
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from napps.kytos.maintenance.models import ( |
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MaintenanceWindow, |
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MaintenanceWindows, |
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MaintenanceID, |
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Status, |
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) |
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@for_all_methods( |
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retries, |
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stop=stop_after_attempt( |
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int(os.environ.get("MONGO_AUTO_RETRY_STOP_AFTER_ATTEMPT", 3)) |
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), |
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wait=wait_random( |
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min=int(os.environ.get("MONGO_AUTO_RETRY_WAIT_RANDOM_MIN", 0.1)), |
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max=int(os.environ.get("MONGO_AUTO_RETRY_WAIT_RANDOM_MAX", 1)), |
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), |
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before_sleep=before_sleep, |
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retry=retry_if_exception_type((AutoReconnect,)), |
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) |
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class MaintenanceController: |
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"""MaintenanceController.""" |
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def __init__(self, get_mongo=lambda: Mongo()) -> None: |
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"""Constructor of MaintenanceController.""" |
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self.mongo = get_mongo() |
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self.db_client = self.mongo.client |
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self.db = self.db_client[self.mongo.db_name] |
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self.windows = self.db['maintenance.windows'].with_options( |
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codec_options=CodecOptions( |
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tz_aware=True, |
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) |
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) |
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def bootstrap_indexes(self) -> None: |
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"""Bootstrap all maintenance related indexes.""" |
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unique_index_tuples = [ |
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("maintenance.windows", [("id", pymongo.ASCENDING)]), |
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] |
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for collection, keys in unique_index_tuples: |
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if self.mongo.bootstrap_index(collection, keys, unique=True): |
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log.info( |
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f"Created DB unique index {keys}, collection: {collection})" |
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) |
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def insert_window(self, window: MaintenanceWindow): |
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now = datetime.now(pytz.utc) |
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try: |
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self.windows.insert_one({ |
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**window.dict(exclude={'inserted_at', 'updated_at'}), |
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'inserted_at': now, |
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'updated_at': now, |
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}) |
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except DuplicateKeyError as err: |
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raise ValueError(f'Window with id: {window.id} already exists') from err |
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def update_window(self, window: MaintenanceWindow): |
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self.windows.update_one( |
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{'id': window.id}, |
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[{ |
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'$set': { |
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**window.dict(exclude={'inserted_at', 'updated_at'}), |
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'updated_at': '$$NOW', |
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}, |
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}], |
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) |
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def get_window(self, mw_id: MaintenanceID) -> Optional[MaintenanceWindow]: |
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window = self.windows.find_one( |
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{'id': mw_id}, |
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{'_id': False}, |
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) |
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if window is None: |
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return None |
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else: |
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return MaintenanceWindow.construct(**window) |
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def start_window(self, mw_id: MaintenanceID) -> MaintenanceWindow: |
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window = self.windows.find_one_and_update( |
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{'id': mw_id}, |
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[{ |
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'$set': { |
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'status': Status.RUNNING, |
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'last_modified': '$$NOW', |
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}, |
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}], |
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{'_id': False}, |
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return_document=pymongo.ReturnDocument.AFTER, |
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) |
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return MaintenanceWindow.construct(**window) |
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def end_window(self, mw_id: MaintenanceID) -> MaintenanceWindow: |
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window = self.windows.find_one_and_update( |
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{'id': mw_id}, |
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[{ |
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'$set': { |
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'status': Status.FINISHED, |
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'last_modified': '$$NOW', |
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}, |
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}], |
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{'_id': False}, |
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return_document=pymongo.ReturnDocument.AFTER, |
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) |
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return MaintenanceWindow.construct(**window) |
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def check_overlap(self, window): |
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# If two time periods are overlapping, |
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# then the start of one time period must occur in the other time period |
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windows = self.windows.find( |
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{ |
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'$or': [ |
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{'$and': [ |
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{'start': {'$lte': window.start}}, |
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{'end': {'$gt': window.start}}, |
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]}, |
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{'$and': [ |
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{'start': {'$gte': window.start}}, |
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{'start': {'$lt': window.end}}, |
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]} |
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] |
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}, |
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{'_id': False} |
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) |
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return MaintenanceWindows.construct( |
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__root__ = [MaintenanceWindow.construct(**window) for window in windows] |
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) |
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def get_windows(self) -> MaintenanceWindows: |
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windows = self.windows.find(projection={'_id': False}) |
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return MaintenanceWindows.construct( |
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__root__ = [MaintenanceWindow.construct(**window) for window in windows] |
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) |
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def remove_window(self, mw_id: MaintenanceID): |
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self.windows.delete_one({'id': mw_id}) |
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def prepare_start(self): |
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now = datetime.now(pytz.utc) |
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self.windows.update_many( |
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{'$and': [ |
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{'status': {'$eq': Status.PENDING}}, |
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{'start': {'$lte': now}}, |
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]}, |
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{ |
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'$set': { |
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'status': Status.RUNNING, |
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'last_modified': now, |
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}, |
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} |
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) |
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self.windows.update_many( |
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{'$and': [ |
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{'status': {'$eq': Status.RUNNING}}, |
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{'end': {'$lte': now}}, |
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]}, |
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{ |
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'$set': { |
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'status': Status.FINISHED, |
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'last_modified': now, |
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}, |
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} |
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) |
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kytos-ng /
maintenance
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