052f17eb20
As per our design doc for Hosts reservations [1], Climate needs to be added three new models called ComputeHost, ComputeHostExtraCapabilities and ComputeHostReservation * ComputeHost will store all info concerning hosts managed by Climate and will keep tracability on if they are free for a lease or not * ComputeHostExtraCapabilities will allow admin user to add extra info for each host to add to Climate like GPU or SSD which are not yet visible thru Nova-Compute * ComputeHostReservation will store all reservation details when creating a lease, needed by Manager when starting the leases Implements bp:host-db-api [1] : https://docs.google.com/drawings/d/1-_DOB65LsSGR4JUaPN525bWAg1yhvEv3KNcHfmuLvYw/edit Change-Id: Ib8f289064a9621372908be1d44db92f3719b24e1
610 lines
17 KiB
Python
610 lines
17 KiB
Python
# Copyright (c) 2013 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Implementation of SQLAlchemy backend."""
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import sys
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import sqlalchemy as sa
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from sqlalchemy.sql.expression import asc
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from sqlalchemy.sql.expression import desc
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from climate import context
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from climate.db.sqlalchemy import models
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from climate.openstack.common.db import exception as db_exc
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from climate.openstack.common.db.sqlalchemy import session as db_session
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from climate.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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get_engine = db_session.get_engine
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get_session = db_session.get_session
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def get_backend():
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"""The backend is this module itself."""
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return sys.modules[__name__]
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def model_query(model, session=None, project_only=None):
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"""Query helper.
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:param model: base model to query
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:param project_only: if present and current context is user-type,
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then restrict query to match the project_id from current context.
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"""
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session = session or get_session()
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query = session.query(model)
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if project_only:
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ctx = context.current()
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query = query.filter_by(tenant_id=ctx.project_id)
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return query
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def column_query(*columns, **kwargs):
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session = kwargs.get("session") or get_session()
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query = session.query(*columns)
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if kwargs.get("project_only"):
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ctx = context.current()
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query = query.filter_by(tenant_id=ctx.tenant_id)
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return query
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def setup_db():
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try:
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engine = db_session.get_engine(sqlite_fk=True)
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models.Lease.metadata.create_all(engine)
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except sa.exc.OperationalError as e:
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LOG.error("Database registration exception: %s", e)
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return False
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return True
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def drop_db():
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try:
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engine = db_session.get_engine(sqlite_fk=True)
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models.Lease.metadata.drop_all(engine)
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except Exception as e:
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LOG.error("Database shutdown exception: %s", e)
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return False
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return True
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## Helpers for building constraints / equality checks
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def constraint(**conditions):
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return Constraint(conditions)
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def equal_any(*values):
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return EqualityCondition(values)
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def not_equal(*values):
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return InequalityCondition(values)
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class Constraint(object):
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def __init__(self, conditions):
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self.conditions = conditions
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def apply(self, model, query):
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for key, condition in self.conditions.iteritems():
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for clause in condition.clauses(getattr(model, key)):
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query = query.filter(clause)
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return query
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class EqualityCondition(object):
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def __init__(self, values):
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self.values = values
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def clauses(self, field):
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return sa.or_([field == value for value in self.values])
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class InequalityCondition(object):
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def __init__(self, values):
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self.values = values
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def clauses(self, field):
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return [field != value for value in self.values]
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#Reservation
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def _reservation_get(session, reservation_id):
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query = model_query(models.Reservation, session)
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return query.filter_by(id=reservation_id).first()
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def reservation_get(reservation_id):
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return _reservation_get(get_session(), reservation_id)
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def reservation_get_all():
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query = model_query(models.Reservation, get_session())
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return query.all()
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def reservation_get_all_by_lease_id(lease_id):
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reservations = model_query(models.Reservation, get_session()).\
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filter_by(lease_id=lease_id)
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return reservations.all()
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def reservation_get_all_by_values(**kwargs):
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"""Returns all entries filtered by col=value."""
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reservation_query = model_query(models.Reservation, get_session())
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for name, value in kwargs.items():
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column = getattr(models.Reservation, name, None)
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if column:
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reservation_query = reservation_query.filter(column == value)
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return reservation_query.all()
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def reservation_create(values):
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values = values.copy()
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reservation = models.Reservation()
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reservation.update(values)
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session = get_session()
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with session.begin():
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try:
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reservation.save(session=session)
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except db_exc.DBDuplicateEntry as e:
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# raise exception about duplicated columns (e.columns)
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raise RuntimeError("DBDuplicateEntry: %s" % e.columns)
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return reservation_get(reservation.id)
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def reservation_update(reservation_id, values):
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session = get_session()
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with session.begin():
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reservation = _reservation_get(session, reservation_id)
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reservation.update(values)
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reservation.save(session=session)
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return reservation_get(reservation_id)
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def reservation_destroy(reservation_id):
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session = get_session()
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with session.begin():
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reservation = _reservation_get(session, reservation_id)
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if not reservation:
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# raise not found error
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raise RuntimeError("Reservation not found!")
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session.delete(reservation)
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#Lease
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def _lease_get(session, lease_id):
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query = model_query(models.Lease, session)
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return query.filter_by(id=lease_id).first()
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def lease_get(lease_id):
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return _lease_get(get_session(), lease_id)
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def lease_get_all():
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query = model_query(models.Lease, get_session())
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return query.all()
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def lease_get_all_by_tenant(tenant_id):
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raise NotImplementedError
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def lease_get_all_by_user(user_id):
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raise NotImplementedError
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def lease_list():
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return model_query(models.Lease, get_session()).all()
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def lease_create(values):
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values = values.copy()
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lease = models.Lease()
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reservations = values.pop("reservations", [])
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events = values.pop("events", [])
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lease.update(values)
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session = get_session()
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with session.begin():
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try:
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lease.save(session=session)
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for r in reservations:
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reservation = models.Reservation()
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reservation.update({"lease_id": lease.id})
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reservation.update(r)
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reservation.save(session=session)
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for e in events:
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event = models.Event()
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event.update({"lease_id": lease.id})
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event.update(e)
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event.save(session=session)
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except db_exc.DBDuplicateEntry as e:
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# raise exception about duplicated columns (e.columns)
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raise RuntimeError("DBDuplicateEntry: %s" % e.columns)
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return lease_get(lease.id)
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def lease_update(lease_id, values):
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session = get_session()
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with session.begin():
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lease = _lease_get(session, lease_id)
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lease.update(values)
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lease.save(session=session)
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return lease_get(lease_id)
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def lease_destroy(lease_id):
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session = get_session()
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with session.begin():
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lease = _lease_get(session, lease_id)
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if not lease:
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# raise not found error
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raise RuntimeError("Lease not found!")
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session.delete(lease)
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#Event
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def _event_get(session, event_id):
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query = model_query(models.Event, session)
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return query.filter_by(id=event_id).first()
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def _event_get_all(session):
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query = model_query(models.Event, session)
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return query
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def event_get(event_id):
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return _event_get(get_session(), event_id)
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def event_get_all():
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return _event_get_all(get_session()).all()
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def event_get_all_sorted_by_filters(sort_key, sort_dir, filters):
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"""Return events filtered and sorted by name of the field."""
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sort_fn = {'desc': desc, 'asc': asc}
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events_query = _event_get_all(get_session())
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if 'status' in filters:
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events_query = \
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events_query.filter(models.Event.status == filters['status'])
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if 'lease_id' in filters:
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events_query = \
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events_query.filter(models.Event.lease_id == filters['lease_id'])
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if 'event_type' in filters:
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events_query = events_query.filter(models.Event.event_type ==
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filters['event_type'])
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events_query = events_query.order_by(
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sort_fn[sort_dir](getattr(models.Event, sort_key))
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)
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return events_query.all()
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def event_list():
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return model_query(models.Event.id, get_session()).all()
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def event_create(values):
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values = values.copy()
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event = models.Event()
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event.update(values)
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session = get_session()
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with session.begin():
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try:
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event.save(session=session)
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except db_exc.DBDuplicateEntry as e:
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# raise exception about duplicated columns (e.columns)
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raise RuntimeError("DBDuplicateEntry: %s" % e.columns)
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return event_get(event.id)
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def event_update(event_id, values):
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session = get_session()
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with session.begin():
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event = _event_get(session, event_id)
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event.update(values)
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event.save(session=session)
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return event_get(event_id)
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def event_destroy(event_id):
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session = get_session()
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with session.begin():
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event = _event_get(session, event_id)
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if not event:
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# raise not found error
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raise RuntimeError("Event not found!")
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session.delete(event)
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#ComputeHostReservation
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def _host_reservation_get(session, host_reservation_id):
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query = model_query(models.ComputeHostReservation, session)
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return query.filter_by(id=host_reservation_id).first()
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def host_reservation_get(host_reservation_id):
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return _host_reservation_get(get_session(),
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host_reservation_id)
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def host_reservation_get_all():
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query = model_query(models.ComputeHostReservation, get_session())
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return query.all()
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def _host_reservation_get_by_reservation_id(session, reservation_id):
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query = model_query(models.ComputeHostReservation, session)
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return query.filter_by(reservation_id=reservation_id).first()
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def host_reservation_get_by_reservation_id(reservation_id):
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return _host_reservation_get_by_reservation_id(get_session(),
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reservation_id)
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def host_reservation_create(values):
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values = values.copy()
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host_reservation = models.ComputeHostReservation()
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host_reservation.update(values)
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session = get_session()
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with session.begin():
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try:
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host_reservation.save(session=session)
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except db_exc.DBDuplicateEntry as e:
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# raise exception about duplicated columns (e.columns)
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raise RuntimeError("DBDuplicateEntry: %s" % e.columns)
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return host_reservation_get(host_reservation.id)
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def host_reservation_update(host_reservation_id, values):
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session = get_session()
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with session.begin():
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host_reservation = _host_reservation_get(session,
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host_reservation_id)
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host_reservation.update(values)
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host_reservation.save(session=session)
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return host_reservation_get(host_reservation_id)
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def host_reservation_destroy(host_reservation_id):
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session = get_session()
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with session.begin():
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host_reservation = _host_reservation_get(session,
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host_reservation_id)
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if not host_reservation:
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# raise not found error
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raise RuntimeError("Host Reservation not found!")
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session.delete(host_reservation)
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#ComputeHost
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def _host_get(session, host_id):
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query = model_query(models.ComputeHost, session)
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return query.filter_by(id=host_id).first()
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def _host_get_all(session):
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query = model_query(models.ComputeHost, session)
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return query
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def host_get(host_id):
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return _host_get(get_session(), host_id)
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def host_list():
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return model_query(models.ComputeHost, get_session()).all()
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def host_get_all_by_filters(filters):
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"""Returns hosts filtered by name of the field."""
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hosts_query = _host_get_all(get_session())
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if 'status' in filters:
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hosts_query = hosts_query.\
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filter(models.ComputeHost.status == filters['status'])
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return hosts_query.all()
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def host_get_all_by_queries(queries):
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"""Returns hosts filtered by an array of queries.
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:param queries: array of queries "key op value" where op can be
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http://docs.sqlalchemy.org/en/rel_0_7/core/expression_api.html
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#sqlalchemy.sql.operators.ColumnOperators
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"""
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hosts_query = model_query(models.ComputeHost, get_session())
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oper = dict({'<': 'lt', '>': 'gt', '<=': 'le', '>=': 'ge', '==': 'eq',
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'!=': 'ne'})
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for query in queries:
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try:
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key, op, value = query.split(' ', 3)
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except ValueError:
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raise RuntimeError('Invalid filter: %s' % query)
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column = getattr(models.ComputeHost, key, None)
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if not column:
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raise RuntimeError('Invalid filter column: %s' % key)
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if op == 'in':
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filt = column.in_(value.split(','))
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else:
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if op in oper:
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op = oper[op]
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try:
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attr = filter(lambda e: hasattr(column, e % op),
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['%s', '%s_', '__%s__'])[0] % op
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except IndexError:
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raise RuntimeError('Invalid filter operator: %s' % op)
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if value == 'null':
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value = None
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filt = getattr(column, attr)(value)
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hosts_query = hosts_query.filter(filt)
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return hosts_query.all()
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def host_create(values):
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values = values.copy()
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host = models.ComputeHost()
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host.update(values)
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session = get_session()
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with session.begin():
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try:
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host.save(session=session)
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except db_exc.DBDuplicateEntry as e:
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# raise exception about duplicated columns (e.columns)
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raise RuntimeError("DBDuplicateEntry: %s" % e.columns)
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return host_get(host.id)
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def host_update(host_id, values):
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session = get_session()
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with session.begin():
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host = _host_get(session, host_id)
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host.update(values)
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host.save(session=session)
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return host_get(host_id)
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def host_destroy(host_id):
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session = get_session()
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with session.begin():
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host = _host_get(session, host_id)
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if not host:
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# raise not found error
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raise RuntimeError("Host not found!")
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session.delete(host)
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#ComputeHostExtraCapability
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def _host_extra_capability_get(session, host_extra_capability_id):
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query = model_query(models.ComputeHostExtraCapability, session)
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return query.filter_by(id=host_extra_capability_id).first()
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def host_extra_capability_get(host_extra_capability_id):
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return _host_extra_capability_get(get_session(),
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host_extra_capability_id)
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def _host_extra_capability_get_all_per_host(session, host_id):
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query = model_query(models.ComputeHostExtraCapability, session)
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return query.filter_by(computehost_id=host_id).all()
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def host_extra_capability_get_all_per_host(host_id):
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return _host_extra_capability_get_all_per_host(get_session(),
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host_id)
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def host_extra_capability_create(values):
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values = values.copy()
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host_extra_capability = models.ComputeHostExtraCapability()
|
|
host_extra_capability.update(values)
|
|
|
|
session = get_session()
|
|
with session.begin():
|
|
try:
|
|
host_extra_capability.save(session=session)
|
|
except db_exc.DBDuplicateEntry as e:
|
|
# raise exception about duplicated columns (e.columns)
|
|
raise RuntimeError("DBDuplicateEntry: %s" % e.columns)
|
|
|
|
return host_extra_capability_get(host_extra_capability.id)
|
|
|
|
|
|
def host_extra_capability_update(host_extra_capability_id, values):
|
|
session = get_session()
|
|
|
|
with session.begin():
|
|
host_extra_capability = \
|
|
_host_extra_capability_get(session,
|
|
host_extra_capability_id)
|
|
host_extra_capability.update(values)
|
|
host_extra_capability.save(session=session)
|
|
|
|
return host_extra_capability_get(host_extra_capability_id)
|
|
|
|
|
|
def host_extra_capability_destroy(host_extra_capability_id):
|
|
session = get_session()
|
|
with session.begin():
|
|
host_extra_capability = \
|
|
_host_extra_capability_get(session,
|
|
host_extra_capability_id)
|
|
|
|
if not host_extra_capability:
|
|
# raise not found error
|
|
raise RuntimeError("Host Extracapability not found!")
|
|
|
|
session.delete(host_extra_capability)
|