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Viewing File: limits_validator.py
# coding: utf-8
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
from collections import defaultdict
from itertools import chain
from typing import Any, Dict, List, Optional, Tuple, Union # NOQA
from cllimits import LveCtl
from cllimitslib_v2 import DEFAULTS, LimitsDataStorage
from clveconfig.ve_config_reader import DEFAULT_PROVIDER
from .base import ENTITY_DEFAULTS, ENTITY_PACKAGE, ENTITY_RESELLER, ENTITY_USER, BaseValidator # NOQA
from .ep_nproc_validator import EpNprocValidator
class LimitsValidator:
# This dict contains keys which are old names of entities
# and contais values which are new names of entities.
# Old names will be replaced by new names for improve readability of error message
dict_of_replaced_names_of_entities = {
'user': 'User(s)',
'package': 'Package(s)',
'reseller': 'Reseller(s)',
'defaults': 'Defaults of resellers'
}
# This dict contains keys which are old ids of entities
# and contais values which are new ids of entities.
# Old ids will be replaced by ids names for improve readability of error message
dict_of_replaced_ids_of_entities = {
'defaults': 'Hoster defaults limits'
}
# This list contains ids entities which will be deleted
# for improve readability of error message
list_of_deleted_ids_of_entities = [
DEFAULTS
]
# This dict contais keys which are old specific messages and
# contains values which are new specific message
# Old specific msgs will be replaced by new for improve readability of error message
dict_of_replaced_specific_messages = {
'inherited from Global': 'inherited from Hoster'
}
def __init__(self, _limits_data_storage=None, validators=None):
# type: (Optional[LimitsDataStorage], Optional[List[BaseValidator]]) -> None
self.limits_provider = _limits_data_storage or LimitsDataStorage()
self._list_validators = validators or [
EpNprocValidator(self.limits_provider),
] # type: List[BaseValidator]
self.message_dict = {
'common_msg': None,
'specific_msg': None,
'affected_entity': None,
'entity_id': None,
}
@staticmethod
def _format_message_string_from_single_msg_dict(msg_dict):
# type: (Dict[str, str, str, str]) -> str
"""
Format message string from single message dict.
That function should be used for formatting message while validation input limits
"""
common_msg = msg_dict['common_msg']
specific_msg = msg_dict['specific_msg']
affected_entity = msg_dict['affected_entity']
entity_id = msg_dict['entity_id']
if affected_entity is not None and entity_id is not None:
if entity_id == DEFAULTS:
msg_about_affect = 'Hoster defaults limits is affected'
elif affected_entity == ENTITY_DEFAULTS:
msg_about_affect = f'Defaults limits of Reseller "{entity_id}" are affected.'
elif affected_entity == ENTITY_USER:
msg_about_affect = f'Limits of user with LVE ID "{entity_id}" are affected.'
elif affected_entity == ENTITY_RESELLER:
msg_about_affect = f'Limits of Reseller "{entity_id}" are affected.'
else:
msg_about_affect = f'Limits of package "{entity_id}" are affected.'
else:
msg_about_affect = ''
if specific_msg is None:
specific_msg = ''
result_msg = f'{common_msg} {msg_about_affect} {specific_msg}'
return result_msg
def _call_validators_and_process_result(self, only_input_limits, *args, **kwargs):
# type: (bool, *Any, **Any) -> Tuple[bool, List]
"""
Call each validator from validators list and processing results
args and kwargs are argumets for calling of validator
We validate limits which already are recorded in ve.cfg if only_input_limits is False.
We validate limits which we want to set if only_input_limits is True
We return aggregated result as bool value and list of messages
which explain which limits are wrong and who holds those
"""
msg_list = []
total_result = True
for validator in self._list_validators:
if only_input_limits:
result, msg_dict = validator.validate_input_limits(*args, **kwargs)
else:
result, msg_dict = validator.validate_existing_limits(*args, **kwargs)
total_result &= result
msg_list.append(msg_dict)
return total_result, msg_list
def validate_input_limits(self, entity_type, entity_id, input_limits, reseller=DEFAULT_PROVIDER):
# type: (str, Union[str, int], Dict, str) -> Tuple[bool, List]
check_reseller_defaults = False
if entity_type == ENTITY_USER:
validated_entity = self.limits_provider.get_user_by_uid(int(entity_id))
elif entity_type == ENTITY_PACKAGE:
validated_entity = self.limits_provider.get_package_by_name_and_reseller(str(entity_id), str(reseller))
elif entity_type == ENTITY_RESELLER:
validated_entity = self.limits_provider.get_reseller_by_name(str(entity_id))
elif entity_type == ENTITY_DEFAULTS:
if entity_id != DEFAULTS:
validated_entity = self.limits_provider.get_reseller_by_name(str(entity_id))
else:
validated_entity = entity_id
check_reseller_defaults = True
else:
validated_entity = None
total_result, msg_list = self._call_validators_and_process_result(
True,
validated_entity,
input_limits,
check_reseller_defaults,
)
msg_list = [self._format_message_string_from_single_msg_dict(msg_dict) for msg_dict in msg_list]
return total_result, msg_list
def _validate_users(self):
# type: () -> List[Tuple[bool, List[Dict]]]
users = self.limits_provider.users.values()
result = [self._call_validators_and_process_result(False, user) for user in users]
return result
def _validate_packages(self):
# type: () -> List[Tuple[bool, List[Dict]]]
packages = self.limits_provider.packages.values()
result = [self._call_validators_and_process_result(False, package) for package in packages]
return result
def _validate_resellers(self):
# type: () -> List[Tuple[bool, List[Dict]]]
resellers = self.limits_provider.resellers.values()
# We should validate only activated resellers,
# because not activated resellers don't have any limits.
result = [self._call_validators_and_process_result(False, reseller) for reseller in resellers
if reseller.defaults is not None]
return result
def _validate_defaults(self):
# type: () -> List[Tuple[bool, List[Dict]]]
result = []
for default_name in self.limits_provider.defaults.keys():
default_entity = self.limits_provider.resellers.get(default_name, DEFAULTS)
# We should validate only defaults which belong to activated resellers,
# because not activated resellers don't have any limits.
if default_entity != DEFAULTS and default_entity.defaults is None:
continue
result.append(self._call_validators_and_process_result(False, default_entity))
return result
def _replace_specific_msgs(self, specific_msg):
# type: (str) -> str
"""
Replacing some specific messages for improve readability of error message
"""
for old_spec_msg, new_spec_msg in self.dict_of_replaced_specific_messages.items():
if specific_msg is None:
break
specific_msg = specific_msg.replace(old_spec_msg, new_spec_msg)
return specific_msg
def _replace_ids_of_entities(self, entity_id):
# type: (str) -> str
"""
Replacing some ids of entities for improve readability of error message
"""
if entity_id in self.dict_of_replaced_ids_of_entities:
return self.dict_of_replaced_ids_of_entities[entity_id]
return entity_id
def _replace_names_of_entities(self, entity_name):
# type: (str) -> str
"""
Replacing some names of entities for improve readability of error message
"""
if entity_name in self.dict_of_replaced_names_of_entities:
return self.dict_of_replaced_names_of_entities[entity_name]
return entity_name
def _format_message_string_for_existing_limits(self, total_result_list):
# type: (List[Dict[str, str, str, str]]) -> str
"""
Format message string from result of execution of validation the existing limits
"""
total_result_dict = defaultdict(lambda: defaultdict(list))
total_msg = None
# We are groupping affected entities (entity_id) by name of check (common_msg)
# and type of affected entity (affected_entity).
for msg_dict in total_result_list:
name_of_check = msg_dict['common_msg']
type_of_affected_entity = self._replace_names_of_entities(msg_dict['affected_entity'])
entity_id = self._replace_ids_of_entities(msg_dict['entity_id'])
# Deleting some ids of entities for improve readability of error message
if entity_id in self.list_of_deleted_ids_of_entities:
continue
total_result_dict[name_of_check][type_of_affected_entity].append({
'entity_id': entity_id,
'specific_msg': self._replace_specific_msgs(msg_dict['specific_msg'])
})
for common_msg, entities_dict in total_result_dict.items():
total_msg = f'{"" if total_msg is None else total_msg}{common_msg}\n'
for entity_type, list_entity_dicts in entities_dict.items():
affected_entities = []
# make string as `entity_1 (specific_msg_1), entity_2, entity_3, entity_4 (specific_msg)
for entity_dict in list_entity_dicts:
if entity_dict['specific_msg'] is None:
affected_entity = entity_dict['entity_id']
else:
affected_entity = f'{entity_dict["entity_id"]} ({entity_dict["specific_msg"]})'
affected_entities.append(affected_entity)
affected_entities = ', '.join(str(item) for item in set(affected_entities))
total_msg = f'{total_msg}{entity_type.capitalize()}: {affected_entities}\n'
return total_msg
def validate_existing_limits(self):
# type: () -> Optional[str]
total_result_list = [
msg_dict for result, msg_dict_list in chain(
self._validate_users(),
self._validate_packages(),
self._validate_resellers(),
self._validate_defaults(),
) for msg_dict in msg_dict_list if not result
]
total_msg = self._format_message_string_for_existing_limits(total_result_list)
return total_msg
@staticmethod
def is_low_pmem_limit_present() -> bool:
"""
Check is Low PMEM limit present
:return True/False
"""
_lvectl = LveCtl()
_panel_uids_list = _lvectl.get_panel_users_uid_list()
_lvectl._load_info(False)
for uid in _panel_uids_list:
if uid == 0:
# skip defaults
continue
limits = _lvectl.get_limits_by_user_id(uid)
# limits example:
# {'cpu': {'all': '100'}, 'io': {'all': '1024'}, 'vmem': '0', 'ep': '20', 'pmem': '*268435456',
# 'nproc': '100', 'iops': '*4096'}
try:
# Extract PMEM limit
pmem_limit_bytes = int(limits['pmem'].replace('*', ''))
if pmem_limit_bytes != 0 and pmem_limit_bytes < 512 * 1024 * 1024:
# PMEM limit not unlimited and < 512 MB - error
return True
except ValueError:
pass
return False
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