789 lines
26 KiB
Python
789 lines
26 KiB
Python
# Copyright 2015 Huawei Technologies Co., Ltd.
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# All Rights Reserved
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import functools
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import time
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import uuid
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from oslo_config import cfg
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from oslo_db import exception as db_exc
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from oslo_log import log as logging
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from oslo_utils import timeutils
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from tricircle.common.context import is_admin_context as _is_admin_context
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from tricircle.common import exceptions
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from tricircle.common.i18n import _
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from tricircle.common.i18n import _LW
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from tricircle.db import core
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from tricircle.db import models
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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def create_pod(context, pod_dict):
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with context.session.begin():
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return core.create_resource(context, models.Pod, pod_dict)
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def delete_pod(context, pod_id):
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with context.session.begin():
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return core.delete_resource(context, models.Pod, pod_id)
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def get_pod(context, pod_id):
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with context.session.begin():
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return core.get_resource(context, models.Pod, pod_id)
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def list_pods(context, filters=None, sorts=None):
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with context.session.begin():
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return core.query_resource(context, models.Pod, filters or [],
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sorts or [])
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def update_pod(context, pod_id, update_dict):
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with context.session.begin():
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return core.update_resource(context, models.Pod, pod_id, update_dict)
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def create_pod_service_configuration(context, config_dict):
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with context.session.begin():
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return core.create_resource(context, models.PodServiceConfiguration,
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config_dict)
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def delete_pod_service_configuration(context, config_id):
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with context.session.begin():
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return core.delete_resource(context, models.PodServiceConfiguration,
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config_id)
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def get_pod_service_configuration(context, config_id):
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with context.session.begin():
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return core.get_resource(context, models.PodServiceConfiguration,
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config_id)
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def list_pod_service_configurations(context, filters=None, sorts=None):
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with context.session.begin():
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return core.query_resource(context, models.PodServiceConfiguration,
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filters or [], sorts or [])
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def update_pod_service_configuration(context, config_id, update_dict):
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with context.session.begin():
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return core.update_resource(
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context, models.PodServiceConfiguration, config_id, update_dict)
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def get_bottom_mappings_by_top_id(context, top_id, resource_type):
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"""Get resource id and pod name on bottom
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:param context: context object
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:param top_id: resource id on top
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:return: a list of tuple (pod dict, bottom_id)
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"""
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route_filters = [{'key': 'top_id', 'comparator': 'eq', 'value': top_id},
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{'key': 'resource_type',
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'comparator': 'eq',
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'value': resource_type}]
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mappings = []
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with context.session.begin():
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routes = core.query_resource(
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context, models.ResourceRouting, route_filters, [])
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for route in routes:
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if not route['bottom_id']:
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continue
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pod = core.get_resource(context, models.Pod, route['pod_id'])
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mappings.append((pod, route['bottom_id']))
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return mappings
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def get_bottom_mappings_by_tenant_pod(context,
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tenant_id,
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pod_id,
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resource_type):
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"""Get resource routing for specific tenant and pod
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:param context: context object
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:param tenant_id: tenant id to look up
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:param pod_id: pod to look up
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:param resource_type: specific resource
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:return: a dic {top_id : route}
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"""
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route_filters = [{'key': 'pod_id',
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'comparator': 'eq',
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'value': pod_id},
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{'key': 'project_id',
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'comparator': 'eq',
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'value': tenant_id},
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{'key': 'resource_type',
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'comparator': 'eq',
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'value': resource_type}]
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routings = {}
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with context.session.begin():
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routes = core.query_resource(
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context, models.ResourceRouting, route_filters, [])
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for _route in routes:
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if not _route['bottom_id']:
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continue
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routings[_route['top_id']] = _route
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return routings
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def get_next_bottom_pod(context, current_pod_id=None):
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pods = list_pods(context, sorts=[(models.Pod.pod_id, True)])
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# NOTE(zhiyuan) number of pods is small, just traverse to filter top pod
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pods = [pod for pod in pods if pod['az_name']]
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for index, pod in enumerate(pods):
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if not current_pod_id:
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return pod
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if pod['pod_id'] == current_pod_id and index < len(pods) - 1:
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return pods[index + 1]
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return None
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def get_top_pod(context):
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filters = [{'key': 'az_name', 'comparator': 'eq', 'value': ''}]
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pods = list_pods(context, filters=filters)
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# only one should be searched
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for pod in pods:
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if (pod['pod_name'] != '') and \
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(pod['az_name'] == ''):
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return pod
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return None
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def get_pod_by_name(context, pod_name):
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filters = [{'key': 'pod_name', 'comparator': 'eq', 'value': pod_name}]
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pods = list_pods(context, filters=filters)
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# only one should be searched
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for pod in pods:
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if pod['pod_name'] == pod_name:
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return pod
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return None
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_DEFAULT_QUOTA_NAME = 'default'
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def _is_user_context(context):
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"""Indicates if the request context is a normal user."""
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if not context:
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return False
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if context.is_admin:
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return False
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if not context.user_id or not context.project_id:
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return False
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return True
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def authorize_quota_class_context(context, class_name):
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"""Ensures a request has permission to access the given quota class."""
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if _is_user_context(context):
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if not context.quota_class:
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raise exceptions.NotAuthorized()
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elif context.quota_class != class_name:
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raise exceptions.NotAuthorized()
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def authorize_project_context(context, project_id):
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"""Ensures a request has permission to access the given project."""
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if _is_user_context(context):
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if not context.project_id:
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raise exceptions.NotAuthorized()
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elif context.project_id != project_id:
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raise exceptions.NotAuthorized()
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def authorize_user_context(context, user_id):
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"""Ensures a request has permission to access the given user."""
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if _is_user_context(context):
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if not context.user_id:
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raise exceptions.NotAuthorized()
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elif context.user_id != user_id:
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raise exceptions.NotAuthorized()
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def require_admin_context(f):
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"""Decorator to require admin request context.
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The first argument to the wrapped function must be the context.
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"""
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def wrapper(*args, **kwargs):
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if not _is_admin_context(args[0]):
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raise exceptions.AdminRequired()
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return f(*args, **kwargs)
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return wrapper
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def require_context(f):
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"""Decorator to require *any* user or admin context.
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This does no authorization for user or project access matching, see
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:py:func:`authorize_project_context` and
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:py:func:`authorize_user_context`.
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The first argument to the wrapped function must be the context.
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"""
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def wrapper(*args, **kwargs):
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if not _is_admin_context(args[0]) and not _is_user_context(args[0]):
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raise exceptions.NotAuthorized()
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return f(*args, **kwargs)
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return wrapper
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def _retry_on_deadlock(f):
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"""Decorator to retry a DB API call if Deadlock was received."""
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@functools.wraps(f)
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def wrapped(*args, **kwargs):
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while True:
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try:
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return f(*args, **kwargs)
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except db_exc.DBDeadlock:
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LOG.warning(_LW("Deadlock detected when running "
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"'%(func_name)s': Retrying..."),
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dict(func_name=f.__name__))
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# Retry!
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time.sleep(0.5)
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continue
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functools.update_wrapper(wrapped, f)
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return wrapped
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def model_query(context, *args, **kwargs):
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"""Query helper that accounts for context's `read_deleted` field.
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:param context: context to query under
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:param session: if present, the session to use
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:param read_deleted: if present, overrides context's read_deleted field.
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:param project_only: if present and context is user-type, then restrict
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query to match the context's project_id.
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"""
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session = kwargs.get('session') or context.session
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read_deleted = kwargs.get('read_deleted') or context.read_deleted
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project_only = kwargs.get('project_only')
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query = session.query(*args)
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if read_deleted == 'no':
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query = query.filter_by(deleted=False)
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elif read_deleted == 'yes':
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pass # omit the filter to include deleted and active
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elif read_deleted == 'only':
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query = query.filter_by(deleted=True)
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elif read_deleted == 'int_no':
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query = query.filter_by(deleted=0)
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else:
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raise Exception(
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_("Unrecognized read_deleted value '%s'") % read_deleted)
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if project_only and _is_user_context(context):
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query = query.filter_by(project_id=context.project_id)
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return query
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@require_context
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def _quota_get(context, project_id, resource, session=None):
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result = model_query(context, models.Quotas, session=session,
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read_deleted="no").\
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filter_by(project_id=project_id).\
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filter_by(resource=resource).\
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first()
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if not result:
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raise exceptions.ProjectQuotaNotFound(project_id=project_id)
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return result
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@require_context
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def quota_get(context, project_id, resource):
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return _quota_get(context, project_id, resource)
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@require_context
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def quota_get_all_by_project(context, project_id):
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authorize_project_context(context, project_id)
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rows = model_query(context, models.Quotas, read_deleted="no").\
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filter_by(project_id=project_id).\
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all()
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result = {'project_id': project_id}
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for row in rows:
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result[row.resource] = row.hard_limit
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return result
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@require_context
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def quota_allocated_get_all_by_project(context, project_id):
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rows = model_query(context, models.Quotas, read_deleted='no').filter_by(
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project_id=project_id).all()
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result = {'project_id': project_id}
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for row in rows:
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result[row.resource] = row.allocated
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return result
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@require_admin_context
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def quota_create(context, project_id, resource, limit, allocated=0):
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quota_ref = models.Quotas()
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quota_ref.project_id = project_id
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quota_ref.resource = resource
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quota_ref.hard_limit = limit
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if allocated:
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quota_ref.allocated = allocated
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session = core.get_session()
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with session.begin():
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quota_ref.save(session)
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return quota_ref
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@require_admin_context
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def quota_update(context, project_id, resource, limit):
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with context.session.begin():
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quota_ref = _quota_get(context, project_id, resource,
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session=context.session)
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quota_ref.hard_limit = limit
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return quota_ref
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@require_admin_context
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def quota_allocated_update(context, project_id, resource, allocated):
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with context.session.begin():
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quota_ref = _quota_get(context, project_id, resource,
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session=context.session)
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quota_ref.allocated = allocated
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return quota_ref
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@require_admin_context
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def quota_destroy(context, project_id, resource):
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with context.session.begin():
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quota_ref = _quota_get(context, project_id, resource,
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session=context.session)
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quota_ref.delete(session=context.session)
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@require_context
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def _quota_class_get(context, class_name, resource, session=None):
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result = model_query(context, models.QuotaClasses, session=session,
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read_deleted="no").\
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filter_by(class_name=class_name).\
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filter_by(resource=resource).\
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first()
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if not result:
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raise exceptions.QuotaClassNotFound(class_name=class_name)
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return result
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@require_context
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def quota_class_get(context, class_name, resource):
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return _quota_class_get(context, class_name, resource)
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def quota_class_get_default(context):
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rows = model_query(context, models.QuotaClasses,
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read_deleted="no").\
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filter_by(class_name=_DEFAULT_QUOTA_NAME).all()
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result = {'class_name': _DEFAULT_QUOTA_NAME}
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for row in rows:
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result[row.resource] = row.hard_limit
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return result
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@require_context
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def quota_class_get_all_by_name(context, class_name):
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authorize_quota_class_context(context, class_name)
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rows = model_query(context, models.QuotaClasses, read_deleted="no").\
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filter_by(class_name=class_name).\
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all()
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result = {'class_name': class_name}
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for row in rows:
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result[row.resource] = row.hard_limit
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return result
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@require_admin_context
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def quota_class_create(context, class_name, resource, limit):
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quota_class_ref = models.QuotaClasses()
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quota_class_ref.class_name = class_name
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quota_class_ref.resource = resource
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quota_class_ref.hard_limit = limit
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session = core.get_session()
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with session.begin():
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quota_class_ref.save(session)
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return quota_class_ref
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@require_admin_context
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def quota_class_update(context, class_name, resource, limit):
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with context.session.begin():
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quota_class_ref = _quota_class_get(context, class_name, resource,
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session=context.session)
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quota_class_ref.hard_limit = limit
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return quota_class_ref
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@require_admin_context
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def quota_class_destroy(context, class_name, resource):
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with context.session.begin():
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quota_class_ref = _quota_class_get(context, class_name, resource,
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session=context.session)
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quota_class_ref.delete(session=context.session)
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@require_admin_context
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def quota_class_destroy_all_by_name(context, class_name):
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with context.session.begin():
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quota_classes = model_query(context, models.QuotaClasses,
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session=context.session,
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read_deleted="no").\
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filter_by(class_name=class_name).\
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all()
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for quota_class_ref in quota_classes:
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quota_class_ref.delete(session=context.session)
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@require_context
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def quota_usage_get(context, project_id, resource):
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result = model_query(context, models.QuotaUsages, read_deleted="no").\
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filter_by(project_id=project_id).\
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filter_by(resource=resource).\
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first()
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if not result:
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raise exceptions.QuotaUsageNotFound(project_id=project_id)
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return result
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@require_context
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def quota_usage_get_all_by_project(context, project_id):
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authorize_project_context(context, project_id)
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rows = model_query(context, models.QuotaUsages, read_deleted="no").\
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filter_by(project_id=project_id).\
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all()
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result = {'project_id': project_id}
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for row in rows:
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result[row.resource] = dict(in_use=row.in_use, reserved=row.reserved)
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return result
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@require_admin_context
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def _quota_usage_create(context, project_id, resource, in_use, reserved,
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until_refresh, session=None):
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quota_usage_ref = models.QuotaUsages()
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quota_usage_ref.project_id = project_id
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quota_usage_ref.resource = resource
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quota_usage_ref.in_use = in_use
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quota_usage_ref.reserved = reserved
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quota_usage_ref.until_refresh = until_refresh
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quota_usage_ref.save(session=session)
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return quota_usage_ref
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def _reservation_create(context, uuid, usage, project_id, resource, delta,
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expire, session=None):
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reservation_ref = models.Reservation()
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reservation_ref.uuid = uuid
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reservation_ref.usage_id = usage['id']
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reservation_ref.project_id = project_id
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reservation_ref.resource = resource
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reservation_ref.delta = delta
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reservation_ref.expire = expire
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reservation_ref.save(session=session)
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return reservation_ref
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# NOTE(johannes): The quota code uses SQL locking to ensure races don't
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# cause under or over counting of resources. To avoid deadlocks, this
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|
# code always acquires the lock on quota_usages before acquiring the lock
|
|
# on reservations.
|
|
|
|
def _get_quota_usages(context, session, project_id):
|
|
# Broken out for testability
|
|
rows = model_query(context, models.QuotaUsages,
|
|
read_deleted="no",
|
|
session=session).\
|
|
filter_by(project_id=project_id).\
|
|
with_lockmode('update').\
|
|
all()
|
|
return {row.resource: row for row in rows}
|
|
|
|
|
|
def _get_quota_usages_by_resource(context, session, project_id, resource):
|
|
# TODO(joehuang), add user_id as part of the filter
|
|
rows = model_query(context, models.QuotaUsages,
|
|
read_deleted="no",
|
|
session=session).\
|
|
filter_by(project_id=project_id).\
|
|
filter_by(resource=resource).\
|
|
with_lockmode('update').\
|
|
all()
|
|
return {row.resource: row for row in rows}
|
|
|
|
|
|
@require_context
|
|
@_retry_on_deadlock
|
|
def quota_reserve(context, resources, quotas, deltas, expire,
|
|
until_refresh, max_age, project_id=None):
|
|
elevated = context.elevated()
|
|
with context.session.begin():
|
|
if project_id is None:
|
|
project_id = context.project_id
|
|
|
|
# Get the current usages
|
|
usages = _get_quota_usages(context, context.session, project_id)
|
|
|
|
# Handle usage refresh
|
|
refresh = False
|
|
work = set(deltas.keys())
|
|
while work:
|
|
resource = work.pop()
|
|
|
|
# Do we need to refresh the usage?
|
|
if resource not in usages:
|
|
usages[resource] = _quota_usage_create(elevated,
|
|
project_id,
|
|
resource,
|
|
0, 0,
|
|
until_refresh or None,
|
|
session=context.session)
|
|
refresh = True
|
|
elif usages[resource].in_use < 0:
|
|
# Negative in_use count indicates a desync, so try to
|
|
# heal from that...
|
|
refresh = True
|
|
elif usages[resource].until_refresh is not None:
|
|
usages[resource].until_refresh -= 1
|
|
if usages[resource].until_refresh <= 0:
|
|
refresh = True
|
|
elif max_age and usages[resource].updated_at is not None and (
|
|
(usages[resource].updated_at -
|
|
timeutils.utcnow()).seconds >= max_age):
|
|
refresh = True
|
|
|
|
if refresh:
|
|
# refresh from the bottom pod
|
|
pass
|
|
|
|
# Check for deltas that would go negative
|
|
unders = [r for r, delta in deltas.items()
|
|
if delta < 0 and delta + usages[r].in_use < 0]
|
|
|
|
# Now, let's check the quotas
|
|
# NOTE(Vek): We're only concerned about positive increments.
|
|
# If a project has gone over quota, we want them to
|
|
# be able to reduce their usage without any
|
|
# problems.
|
|
overs = [r for r, delta in deltas.items()
|
|
if quotas[r] >= 0 and delta >= 0 and
|
|
quotas[r] < delta + usages[r].in_use + usages[r].reserved]
|
|
|
|
# NOTE(Vek): The quota check needs to be in the transaction,
|
|
# but the transaction doesn't fail just because
|
|
# we're over quota, so the OverQuota raise is
|
|
# outside the transaction. If we did the raise
|
|
# here, our usage updates would be discarded, but
|
|
# they're not invalidated by being over-quota.
|
|
|
|
# Create the reservations
|
|
if not overs:
|
|
reservations = []
|
|
for resource, delta in deltas.items():
|
|
reservation = _reservation_create(elevated,
|
|
str(uuid.uuid4()),
|
|
usages[resource],
|
|
project_id,
|
|
resource, delta, expire,
|
|
session=context.session)
|
|
reservations.append(reservation.uuid)
|
|
|
|
# Also update the reserved quantity
|
|
# NOTE(Vek): Again, we are only concerned here about
|
|
# positive increments. Here, though, we're
|
|
# worried about the following scenario:
|
|
#
|
|
# 1) User initiates resize down.
|
|
# 2) User allocates a new instance.
|
|
# 3) Resize down fails or is reverted.
|
|
# 4) User is now over quota.
|
|
#
|
|
# To prevent this, we only update the
|
|
# reserved value if the delta is positive.
|
|
if delta > 0:
|
|
usages[resource].reserved += delta
|
|
|
|
if unders:
|
|
LOG.warning(_LW("Change will make usage less than 0 for the following "
|
|
"resources: %s"), unders)
|
|
if overs:
|
|
usages = {k: dict(in_use=v['in_use'], reserved=v['reserved'])
|
|
for k, v in usages.items()}
|
|
raise exceptions.OverQuota(overs=sorted(overs), quotas=quotas,
|
|
usages=usages)
|
|
|
|
return reservations
|
|
|
|
|
|
def _quota_reservations(session, context, reservations):
|
|
"""Return the relevant reservations."""
|
|
|
|
# Get the listed reservations
|
|
return model_query(context, models.Reservation,
|
|
read_deleted="no",
|
|
session=session).\
|
|
filter(models.Reservation.uuid.in_(reservations)).\
|
|
with_lockmode('update').\
|
|
all()
|
|
|
|
|
|
@require_context
|
|
@_retry_on_deadlock
|
|
def reservation_commit(context, reservations, project_id=None):
|
|
with context.session.begin():
|
|
usages = _get_quota_usages(context, context.session, project_id)
|
|
|
|
for reservation in _quota_reservations(context.session,
|
|
context,
|
|
reservations):
|
|
usage = usages[reservation.resource]
|
|
if reservation.delta >= 0:
|
|
usage.reserved -= reservation.delta
|
|
usage.in_use += reservation.delta
|
|
|
|
reservation.delete(session=context.session)
|
|
|
|
|
|
@require_context
|
|
@_retry_on_deadlock
|
|
def reservation_rollback(context, reservations, project_id=None):
|
|
with context.session.begin():
|
|
usages = _get_quota_usages(context, context.session, project_id)
|
|
|
|
for reservation in _quota_reservations(context.session,
|
|
context,
|
|
reservations):
|
|
usage = usages[reservation.resource]
|
|
if reservation.delta >= 0:
|
|
usage.reserved -= reservation.delta
|
|
|
|
reservation.delete(session=context.session)
|
|
|
|
|
|
def quota_destroy_by_project(*args, **kwargs):
|
|
"""Destroy all limit quotas associated with a project.
|
|
|
|
Leaves usage and reservation quotas intact.
|
|
"""
|
|
quota_destroy_all_by_project(only_quotas=True, *args, **kwargs)
|
|
|
|
|
|
@require_admin_context
|
|
@_retry_on_deadlock
|
|
def quota_destroy_all_by_project(context, project_id, only_quotas=False):
|
|
"""Destroy all quotas associated with a project.
|
|
|
|
This includes limit quotas, usage quotas and reservation quotas.
|
|
Optionally can only remove limit quotas and leave other types as they are.
|
|
|
|
:param context: The request context, for access checks.
|
|
:param project_id: The ID of the project being deleted.
|
|
:param only_quotas: Only delete limit quotas, leave other types intact.
|
|
"""
|
|
with context.session.begin():
|
|
quotas = model_query(context, models.Quotas, session=context.session,
|
|
read_deleted="no").\
|
|
filter_by(project_id=project_id).\
|
|
all()
|
|
|
|
for quota_ref in quotas:
|
|
quota_ref.delete(session=context.session)
|
|
|
|
if only_quotas:
|
|
return
|
|
|
|
quota_usages = model_query(context, models.QuotaUsages,
|
|
session=context.session,
|
|
read_deleted="no").\
|
|
filter_by(project_id=project_id).\
|
|
all()
|
|
|
|
for quota_usage_ref in quota_usages:
|
|
quota_usage_ref.delete(session=context.session)
|
|
|
|
reservations = model_query(context, models.Reservation,
|
|
session=context.session,
|
|
read_deleted="no").\
|
|
filter_by(project_id=project_id).\
|
|
all()
|
|
|
|
for reservation_ref in reservations:
|
|
reservation_ref.delete(session=context.session)
|
|
|
|
|
|
@require_admin_context
|
|
@_retry_on_deadlock
|
|
def reservation_expire(context):
|
|
with context.session.begin():
|
|
current_time = timeutils.utcnow()
|
|
results = model_query(context, models.Reservation,
|
|
session=context.session,
|
|
read_deleted="no").\
|
|
filter(models.Reservation.expire < current_time).\
|
|
all()
|
|
|
|
if results:
|
|
for reservation in results:
|
|
if reservation.delta >= 0:
|
|
reservation.usage.reserved -= reservation.delta
|
|
reservation.usage.save(session=context.session)
|
|
|
|
reservation.delete(session=context.session)
|