369 lines
14 KiB
Python
369 lines
14 KiB
Python
# Copyright [2013] Hewlett-Packard Development Company, L.P.
|
|
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""Model classes that form the core of snapshots functionality."""
|
|
|
|
from oslo_log import log as logging
|
|
from requests.exceptions import ConnectionError
|
|
from sqlalchemy import desc
|
|
from swiftclient.client import ClientException
|
|
|
|
from trove.backup.state import BackupState
|
|
from trove.common import cfg
|
|
from trove.common import exception
|
|
from trove.common.i18n import _
|
|
from trove.common.remote import create_swift_client
|
|
from trove.common import utils
|
|
from trove.datastore import models as datastore_models
|
|
from trove.db.models import DatabaseModelBase
|
|
from trove.quota.quota import run_with_quotas
|
|
from trove.taskmanager import api
|
|
|
|
CONF = cfg.CONF
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class Backup(object):
|
|
|
|
@classmethod
|
|
def validate_can_perform_action(cls, instance, operation):
|
|
"""
|
|
Raises exception if backup strategy is not supported
|
|
"""
|
|
datastore_cfg = CONF.get(instance.datastore_version.manager)
|
|
if not datastore_cfg or not (
|
|
datastore_cfg.get('backup_strategy', None)):
|
|
raise exception.DatastoreOperationNotSupported(
|
|
operation=operation, datastore=instance.datastore.name)
|
|
|
|
@classmethod
|
|
def create(cls, context, instance, name, description=None,
|
|
parent_id=None, incremental=False):
|
|
"""
|
|
create db record for Backup
|
|
:param cls:
|
|
:param context: tenant_id included
|
|
:param instance:
|
|
:param name:
|
|
:param description:
|
|
:param parent_id:
|
|
:param incremental: flag to indicate incremental backup
|
|
based on previous backup
|
|
:return:
|
|
"""
|
|
|
|
def _create_resources():
|
|
# parse the ID from the Ref
|
|
instance_id = utils.get_id_from_href(instance)
|
|
|
|
# verify that the instance exists and can perform actions
|
|
from trove.instance.models import Instance
|
|
instance_model = Instance.load(context, instance_id)
|
|
instance_model.validate_can_perform_action()
|
|
cls.validate_can_perform_action(
|
|
instance_model, 'backup_create')
|
|
cls.verify_swift_auth_token(context)
|
|
if instance_model.cluster_id is not None:
|
|
raise exception.ClusterInstanceOperationNotSupported()
|
|
|
|
ds = instance_model.datastore
|
|
ds_version = instance_model.datastore_version
|
|
parent = None
|
|
last_backup_id = None
|
|
if parent_id:
|
|
# Look up the parent info or fail early if not found or if
|
|
# the user does not have access to the parent.
|
|
_parent = cls.get_by_id(context, parent_id)
|
|
parent = {
|
|
'location': _parent.location,
|
|
'checksum': _parent.checksum,
|
|
}
|
|
elif incremental:
|
|
_parent = Backup.get_last_completed(context, instance_id)
|
|
if _parent:
|
|
parent = {
|
|
'location': _parent.location,
|
|
'checksum': _parent.checksum
|
|
}
|
|
last_backup_id = _parent.id
|
|
try:
|
|
db_info = DBBackup.create(name=name,
|
|
description=description,
|
|
tenant_id=context.project_id,
|
|
state=BackupState.NEW,
|
|
instance_id=instance_id,
|
|
parent_id=parent_id or
|
|
last_backup_id,
|
|
datastore_version_id=ds_version.id,
|
|
deleted=False)
|
|
except exception.InvalidModelError as ex:
|
|
LOG.exception("Unable to create backup record for "
|
|
"instance: %s", instance_id)
|
|
raise exception.BackupCreationError(str(ex))
|
|
|
|
backup_info = {'id': db_info.id,
|
|
'name': name,
|
|
'description': description,
|
|
'instance_id': instance_id,
|
|
'backup_type': db_info.backup_type,
|
|
'checksum': db_info.checksum,
|
|
'parent': parent,
|
|
'datastore': ds.name,
|
|
'datastore_version': ds_version.name,
|
|
}
|
|
api.API(context).create_backup(backup_info, instance_id)
|
|
return db_info
|
|
return run_with_quotas(context.project_id,
|
|
{'backups': 1},
|
|
_create_resources)
|
|
|
|
@classmethod
|
|
def running(cls, instance_id, exclude=None):
|
|
"""
|
|
Returns the first running backup for instance_id
|
|
:param instance_id: Id of the instance
|
|
:param exclude: Backup ID to exclude from the query (any other running)
|
|
"""
|
|
query = DBBackup.query()
|
|
query = query.filter(DBBackup.instance_id == instance_id,
|
|
DBBackup.state.in_(BackupState.RUNNING_STATES))
|
|
# filter out deleted backups, PEP8 does not like field == False!
|
|
query = query.filter_by(deleted=False)
|
|
if exclude:
|
|
query = query.filter(DBBackup.id != exclude)
|
|
return query.first()
|
|
|
|
@classmethod
|
|
def get_by_id(cls, context, backup_id, deleted=False):
|
|
"""
|
|
get the backup for that id
|
|
:param cls:
|
|
:param backup_id: Id of the backup to return
|
|
:param deleted: Return deleted backups
|
|
:return:
|
|
"""
|
|
try:
|
|
db_info = DBBackup.find_by(context=context,
|
|
id=backup_id,
|
|
deleted=deleted)
|
|
return db_info
|
|
except exception.NotFound:
|
|
raise exception.NotFound(uuid=backup_id)
|
|
|
|
@classmethod
|
|
def _paginate(cls, context, query):
|
|
"""Paginate the results of the base query.
|
|
We use limit/offset as the results need to be ordered by date
|
|
and not the primary key.
|
|
"""
|
|
marker = int(context.marker or 0)
|
|
limit = int(context.limit or CONF.backups_page_size)
|
|
# order by 'updated DESC' to show the most recent backups first
|
|
query = query.order_by(desc(DBBackup.updated))
|
|
# Apply limit/offset
|
|
query = query.limit(limit)
|
|
query = query.offset(marker)
|
|
# check if we need to send a marker for the next page
|
|
if query.count() < limit:
|
|
marker = None
|
|
else:
|
|
marker += limit
|
|
return query.all(), marker
|
|
|
|
@classmethod
|
|
def list(cls, context, datastore=None, instance_id=None,
|
|
all_projects=False):
|
|
query = DBBackup.query()
|
|
filters = [DBBackup.deleted == 0]
|
|
|
|
if not all_projects:
|
|
filters.append(DBBackup.tenant_id == context.project_id)
|
|
if instance_id:
|
|
filters.append(DBBackup.instance_id == instance_id)
|
|
|
|
if datastore:
|
|
ds = datastore_models.Datastore.load(datastore)
|
|
filters.append(datastore_models.DBDatastoreVersion.
|
|
datastore_id == ds.id)
|
|
query = query.join(datastore_models.DBDatastoreVersion)
|
|
|
|
query = query.filter(*filters)
|
|
return cls._paginate(context, query)
|
|
|
|
@classmethod
|
|
def list_for_instance(cls, context, instance_id):
|
|
"""
|
|
list all live Backups associated with given instance
|
|
:param cls:
|
|
:param instance_id:
|
|
:return:
|
|
"""
|
|
query = DBBackup.query()
|
|
if context.is_admin:
|
|
query = query.filter_by(instance_id=instance_id,
|
|
deleted=False)
|
|
else:
|
|
query = query.filter_by(instance_id=instance_id,
|
|
tenant_id=context.project_id,
|
|
deleted=False)
|
|
return cls._paginate(context, query)
|
|
|
|
@classmethod
|
|
def get_last_completed(cls, context, instance_id,
|
|
include_incremental=True):
|
|
"""
|
|
returns last completed backup
|
|
:param cls:
|
|
:param instance_id:
|
|
:param include_incremental:
|
|
:return:
|
|
"""
|
|
last_backup = None
|
|
backups, marker = cls.list_for_instance(context, instance_id)
|
|
# we don't care about the marker since we only want the first backup
|
|
# and they are ordered descending based on date (what we want)
|
|
for backup in backups:
|
|
if backup.state == BackupState.COMPLETED and (
|
|
include_incremental or not backup.parent_id):
|
|
if not last_backup or backup.updated > last_backup.updated:
|
|
last_backup = backup
|
|
|
|
return last_backup
|
|
|
|
@classmethod
|
|
def fail_for_instance(cls, instance_id):
|
|
query = DBBackup.query()
|
|
query = query.filter(DBBackup.instance_id == instance_id,
|
|
DBBackup.state.in_(BackupState.RUNNING_STATES))
|
|
query = query.filter_by(deleted=False)
|
|
for backup in query.all():
|
|
backup.state = BackupState.FAILED
|
|
backup.save()
|
|
|
|
@classmethod
|
|
def delete(cls, context, backup_id):
|
|
"""
|
|
update Backup table on deleted flag for given Backup
|
|
:param cls:
|
|
:param context: context containing the tenant id and token
|
|
:param backup_id: Backup uuid
|
|
:return:
|
|
"""
|
|
|
|
# Recursively delete all children and grandchildren of this backup.
|
|
query = DBBackup.query()
|
|
query = query.filter_by(parent_id=backup_id, deleted=False)
|
|
for child in query.all():
|
|
try:
|
|
cls.delete(context, child.id)
|
|
except exception.NotFound:
|
|
LOG.exception("Backup %s cannot be found.", backup_id)
|
|
|
|
def _delete_resources():
|
|
backup = cls.get_by_id(context, backup_id)
|
|
if backup.is_running:
|
|
msg = _("Backup %s cannot be deleted because it is running.")
|
|
raise exception.UnprocessableEntity(msg % backup_id)
|
|
cls.verify_swift_auth_token(context)
|
|
api.API(context).delete_backup(backup_id)
|
|
|
|
return run_with_quotas(context.project_id,
|
|
{'backups': -1},
|
|
_delete_resources)
|
|
|
|
@classmethod
|
|
def verify_swift_auth_token(cls, context):
|
|
try:
|
|
client = create_swift_client(context)
|
|
client.get_account()
|
|
except ClientException:
|
|
raise exception.SwiftAuthError(tenant_id=context.project_id)
|
|
except exception.NoServiceEndpoint:
|
|
raise exception.SwiftNotFound(tenant_id=context.project_id)
|
|
except ConnectionError:
|
|
raise exception.SwiftConnectionError()
|
|
|
|
|
|
def persisted_models():
|
|
return {'backups': DBBackup}
|
|
|
|
|
|
class DBBackup(DatabaseModelBase):
|
|
"""A table for Backup records."""
|
|
_data_fields = ['name', 'description', 'location', 'backup_type',
|
|
'size', 'tenant_id', 'state', 'instance_id',
|
|
'checksum', 'backup_timestamp', 'deleted', 'created',
|
|
'updated', 'deleted_at', 'parent_id',
|
|
'datastore_version_id']
|
|
_table_name = 'backups'
|
|
|
|
@property
|
|
def is_running(self):
|
|
return self.state in BackupState.RUNNING_STATES
|
|
|
|
@property
|
|
def is_done(self):
|
|
return self.state in BackupState.END_STATES
|
|
|
|
@property
|
|
def is_done_successfuly(self):
|
|
return self.state == BackupState.COMPLETED
|
|
|
|
@property
|
|
def filename(self):
|
|
if self.location:
|
|
last_slash = self.location.rfind("/")
|
|
if last_slash < 0:
|
|
raise ValueError(_("Bad location for backup object: %s")
|
|
% self.location)
|
|
return self.location[last_slash + 1:]
|
|
else:
|
|
return None
|
|
|
|
@property
|
|
def datastore(self):
|
|
if self.datastore_version_id:
|
|
return datastore_models.Datastore.load(
|
|
self.datastore_version.datastore_id)
|
|
|
|
@property
|
|
def datastore_version(self):
|
|
if self.datastore_version_id:
|
|
return datastore_models.DatastoreVersion.load_by_uuid(
|
|
self.datastore_version_id)
|
|
|
|
def check_swift_object_exist(self, context, verify_checksum=False):
|
|
try:
|
|
parts = self.location.split('/')
|
|
obj = parts[-1]
|
|
container = parts[-2]
|
|
client = create_swift_client(context)
|
|
LOG.debug("Checking if backup exists in %s", self.location)
|
|
resp = client.head_object(container, obj)
|
|
if verify_checksum:
|
|
LOG.debug("Checking if backup checksum matches swift "
|
|
"for backup %s", self.id)
|
|
# swift returns etag in double quotes
|
|
# e.g. '"dc3b0827f276d8d78312992cc60c2c3f"'
|
|
swift_checksum = resp['etag'].strip('"')
|
|
if self.checksum != swift_checksum:
|
|
raise exception.RestoreBackupIntegrityError(
|
|
backup_id=self.id)
|
|
return True
|
|
except ClientException as e:
|
|
if e.http_status == 404:
|
|
return False
|
|
else:
|
|
raise exception.SwiftAuthError(tenant_id=context.project_id)
|