235 lines
11 KiB
Python
235 lines
11 KiB
Python
# Copyright 2014 Rackspace
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# Copyright 2016 Blue Box, an IBM Company
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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 logging
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from oslo_db import exception as odb_exceptions
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from oslo_utils import excutils
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import pecan
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from wsme import types as wtypes
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from wsmeext import pecan as wsme_pecan
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from octavia.api.v2.controllers import base
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from octavia.api.v2.types import member as member_types
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from octavia.common import constants
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from octavia.common import data_models
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from octavia.common import exceptions
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import octavia.common.validate as validate
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from octavia.db import api as db_api
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from octavia.db import prepare as db_prepare
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LOG = logging.getLogger(__name__)
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class MembersController(base.BaseController):
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def __init__(self, pool_id):
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super(MembersController, self).__init__()
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self.pool_id = pool_id
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self.handler = self.handler.member
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@wsme_pecan.wsexpose(member_types.MemberRootResponse, wtypes.text)
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def get(self, id):
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"""Gets a single pool member's details."""
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context = pecan.request.context.get('octavia_context')
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db_member = self._get_db_member(context.session, id)
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result = self._convert_db_to_type(db_member,
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member_types.MemberResponse)
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return member_types.MemberRootResponse(member=result)
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@wsme_pecan.wsexpose(member_types.MembersRootResponse, wtypes.text)
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def get_all(self):
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"""Lists all pool members of a pool."""
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context = pecan.request.context.get('octavia_context')
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db_members = self.repositories.member.get_all(
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context.session, show_deleted=False, pool_id=self.pool_id)
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result = self._convert_db_to_type(
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db_members, [member_types.MemberResponse])
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return member_types.MembersRootResponse(members=result)
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def _get_affected_listener_ids(self, session, member=None):
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"""Gets a list of all listeners this request potentially affects."""
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if member:
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listener_ids = [l.id for l in member.pool.listeners]
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else:
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pool = self._get_db_pool(session, self.pool_id)
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listener_ids = [l.id for l in pool.listeners]
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return listener_ids
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def _test_lb_and_listener_and_pool_statuses(self, session, member=None):
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"""Verify load balancer is in a mutable state."""
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# We need to verify that any listeners referencing this member's
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# pool are also mutable
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pool = self._get_db_pool(session, self.pool_id)
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load_balancer_id = pool.load_balancer_id
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if not self.repositories.test_and_set_lb_and_listeners_prov_status(
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session, load_balancer_id,
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constants.PENDING_UPDATE, constants.PENDING_UPDATE,
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listener_ids=self._get_affected_listener_ids(session, member),
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pool_id=self.pool_id):
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LOG.info("Member cannot be created or modified because the "
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"Load Balancer is in an immutable state")
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raise exceptions.ImmutableObject(resource='Load Balancer',
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id=load_balancer_id)
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def _reset_lb_listener_pool_statuses(self, session, member=None):
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# Setting LB + listener + pool back to active because this should be a
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# recoverable error
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pool = self._get_db_pool(session, self.pool_id)
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load_balancer_id = pool.load_balancer_id
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self.repositories.load_balancer.update(
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session, load_balancer_id,
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provisioning_status=constants.ACTIVE)
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for listener in self._get_affected_listener_ids(session, member):
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self.repositories.listener.update(
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session, listener,
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provisioning_status=constants.ACTIVE)
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self.repositories.pool.update(session, self.pool_id,
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provisioning_status=constants.ACTIVE)
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def _validate_create_member(self, lock_session, member_dict):
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"""Validate creating member on pool."""
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try:
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return self.repositories.member.create(lock_session, **member_dict)
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except odb_exceptions.DBDuplicateEntry as de:
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column_list = ['pool_id', 'ip_address', 'protocol_port']
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constraint_list = ['uq_member_pool_id_address_protocol_port']
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if ['id'] == de.columns:
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raise exceptions.IDAlreadyExists()
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elif (set(column_list) == set(de.columns) or
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set(constraint_list) == set(de.columns)):
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raise exceptions.DuplicateMemberEntry(
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ip_address=member_dict.get('ip_address'),
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port=member_dict.get('protocol_port'))
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except odb_exceptions.DBError:
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# TODO(blogan): will have to do separate validation protocol
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# before creation or update since the exception messages
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# do not give any information as to what constraint failed
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raise exceptions.InvalidOption(value='', option='')
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def _send_member_to_handler(self, session, db_member):
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try:
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LOG.info("Sending Creation of Pool %s to handler", db_member.id)
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self.handler.create(db_member)
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except Exception:
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with excutils.save_and_reraise_exception(
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reraise=False), db_api.get_lock_session() as lock_session:
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self._reset_lb_listener_pool_statuses(
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lock_session, member=db_member)
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# Member now goes to ERROR
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self.repositories.member.update(
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lock_session, db_member.id,
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provisioning_status=constants.ERROR)
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db_member = self._get_db_member(session, db_member.id)
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result = self._convert_db_to_type(db_member,
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member_types.MemberResponse)
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return member_types.MemberRootResponse(member=result)
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@wsme_pecan.wsexpose(member_types.MemberRootResponse,
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body=member_types.MemberRootPOST, status_code=201)
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def post(self, member_):
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"""Creates a pool member on a pool."""
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member = member_.member
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context = pecan.request.context.get('octavia_context')
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# Validate member subnet
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if member.subnet_id and not validate.subnet_exists(member.subnet_id):
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raise exceptions.NotFound(resource='Subnet',
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id=member.subnet_id)
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pool = self.repositories.pool.get(context.session, id=self.pool_id)
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member.project_id = self._get_lb_project_id(context.session,
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pool.load_balancer_id)
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lock_session = db_api.get_session(autocommit=False)
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if self.repositories.check_quota_met(
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context.session,
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lock_session,
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data_models.Member,
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member.project_id):
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lock_session.rollback()
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raise exceptions.QuotaException
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member_dict = db_prepare.create_member(member.to_dict(
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render_unsets=True), self.pool_id, bool(pool.health_monitor))
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try:
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self._test_lb_and_listener_and_pool_statuses(lock_session)
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db_member = self._validate_create_member(lock_session, member_dict)
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lock_session.commit()
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except Exception:
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with excutils.save_and_reraise_exception():
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lock_session.rollback()
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return self._send_member_to_handler(context.session, db_member)
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@wsme_pecan.wsexpose(member_types.MemberRootResponse,
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wtypes.text, body=member_types.MemberRootPUT,
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status_code=200)
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def put(self, id, member_):
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"""Updates a pool member."""
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member = member_.member
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context = pecan.request.context.get('octavia_context')
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db_member = self._get_db_member(context.session, id)
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self._test_lb_and_listener_and_pool_statuses(context.session,
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member=db_member)
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self.repositories.member.update(
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context.session, db_member.id,
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provisioning_status=constants.PENDING_UPDATE)
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try:
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LOG.info("Sending Update of Member %s to handler", id)
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self.handler.update(db_member, member)
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except Exception:
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with excutils.save_and_reraise_exception(
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reraise=False), db_api.get_lock_session() as lock_session:
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self._reset_lb_listener_pool_statuses(
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lock_session, member=db_member)
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# Member now goes to ERROR
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self.repositories.member.update(
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lock_session, db_member.id,
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provisioning_status=constants.ERROR)
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db_member = self._get_db_member(context.session, id)
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result = self._convert_db_to_type(db_member,
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member_types.MemberResponse)
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return member_types.MemberRootResponse(member=result)
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@wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
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def delete(self, id):
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"""Deletes a pool member."""
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context = pecan.request.context.get('octavia_context')
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db_member = self._get_db_member(context.session, id)
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self._test_lb_and_listener_and_pool_statuses(context.session,
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member=db_member)
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self.repositories.member.update(
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context.session, db_member.id,
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provisioning_status=constants.PENDING_DELETE)
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try:
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LOG.info("Sending Deletion of Member %s to handler", db_member.id)
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self.handler.delete(db_member)
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except Exception:
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with excutils.save_and_reraise_exception(
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reraise=False), db_api.get_lock_session() as lock_session:
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self._reset_lb_listener_pool_statuses(
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lock_session, member=db_member)
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# Member now goes to ERROR
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self.repositories.member.update(
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lock_session, db_member.id,
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provisioning_status=constants.ERROR)
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db_member = self.repositories.member.get(context.session, id=id)
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result = self._convert_db_to_type(db_member,
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member_types.MemberResponse)
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return member_types.MembersRootResponse(member=result)
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