214 lines
8.1 KiB
Python
214 lines
8.1 KiB
Python
# Copyright 2013 Mirantis Inc.
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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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#
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import os
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from oslo_log import log as logging
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from trove.common import cfg
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from trove.common.i18n import _
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from trove.common import instance as trove_instance
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from trove.guestagent import backup
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from trove.guestagent.datastore.experimental.cassandra import service
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from trove.guestagent.datastore.experimental.cassandra.service import (
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CassandraAdmin
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)
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from trove.guestagent.datastore import manager
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from trove.guestagent import volume
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class Manager(manager.Manager):
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def __init__(self):
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self._app = service.CassandraApp()
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self.__admin = CassandraAdmin(self.app.get_current_superuser())
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super(Manager, self).__init__('cassandra')
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@property
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def status(self):
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return self.app.status
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@property
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def app(self):
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return self._app
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@property
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def admin(self):
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return self.__admin
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@property
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def configuration_manager(self):
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return self.app.configuration_manager
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def restart(self, context):
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self.app.restart()
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def start_db_with_conf_changes(self, context, config_contents):
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self.app.start_db_with_conf_changes(config_contents)
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def stop_db(self, context, do_not_start_on_reboot=False):
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self.app.stop_db(do_not_start_on_reboot=do_not_start_on_reboot)
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def reset_configuration(self, context, configuration):
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self.app.reset_configuration(configuration)
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def do_prepare(self, context, packages, databases, memory_mb, users,
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device_path, mount_point, backup_info,
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config_contents, root_password, overrides,
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cluster_config, snapshot):
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"""This is called from prepare in the base class."""
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self.app.install_if_needed(packages)
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self.app.init_storage_structure(mount_point)
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if config_contents or device_path or backup_info:
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# FIXME(pmalik) Once the cassandra bug
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# https://issues.apache.org/jira/browse/CASSANDRA-2356
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# is fixed, this code may have to be revisited.
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#
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# Cassandra generates system keyspaces on the first start.
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# The stored properties include the 'cluster_name', which once
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# saved cannot be easily changed without removing the system
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# tables. It is crucial that the service does not boot up in
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# the middle of the configuration procedure.
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# We wait here for the service to come up, stop it properly and
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# remove the generated keyspaces before proceeding with
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# configuration. If it does not start up within the time limit
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# we assume it is not going to and proceed with configuration
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# right away.
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LOG.debug("Waiting for database first boot.")
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if (self.app.status.wait_for_real_status_to_change_to(
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trove_instance.ServiceStatuses.RUNNING,
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CONF.state_change_wait_time,
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False)):
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LOG.debug("Stopping database prior to initial configuration.")
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self.app.stop_db()
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self.app._remove_system_tables()
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LOG.debug("Starting initial configuration.")
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if config_contents:
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LOG.debug("Applying configuration.")
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self.app.configuration_manager.save_configuration(
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config_contents)
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self.app.apply_initial_guestagent_configuration()
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if device_path:
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LOG.debug("Preparing data volume.")
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device = volume.VolumeDevice(device_path)
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# unmount if device is already mounted
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device.unmount_device(device_path)
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device.format()
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if os.path.exists(mount_point):
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# rsync exiting data
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LOG.debug("Migrating existing data.")
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device.migrate_data(mount_point)
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# mount the volume
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LOG.debug("Mounting new volume.")
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device.mount(mount_point)
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if backup_info:
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self._perform_restore(backup_info, context, mount_point)
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LOG.debug("Starting database with configuration changes.")
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self.app.start_db(update_db=False)
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if not self.app.has_user_config():
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LOG.debug("Securing superuser access.")
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self.app.secure()
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self.app.restart()
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self.__admin = CassandraAdmin(self.app.get_current_superuser())
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def change_passwords(self, context, users):
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self.admin.change_passwords(context, users)
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def update_attributes(self, context, username, hostname, user_attrs):
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self.admin.update_attributes(context, username, hostname, user_attrs)
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def create_database(self, context, databases):
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self.admin.create_database(context, databases)
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def create_user(self, context, users):
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self.admin.create_user(context, users)
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def delete_database(self, context, database):
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self.admin.delete_database(context, database)
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def delete_user(self, context, user):
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self.admin.delete_user(context, user)
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def get_user(self, context, username, hostname):
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return self.admin.get_user(context, username, hostname)
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def grant_access(self, context, username, hostname, databases):
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self.admin.grant_access(context, username, hostname, databases)
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def revoke_access(self, context, username, hostname, database):
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self.admin.revoke_access(context, username, hostname, database)
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def list_access(self, context, username, hostname):
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return self.admin.list_access(context, username, hostname)
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def list_databases(self, context, limit=None, marker=None,
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include_marker=False):
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return self.admin.list_databases(context, limit, marker,
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include_marker)
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def list_users(self, context, limit=None, marker=None,
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include_marker=False):
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return self.admin.list_users(context, limit, marker, include_marker)
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def _perform_restore(self, backup_info, context, restore_location):
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LOG.info(_("Restoring database from backup %s.") % backup_info['id'])
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try:
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backup.restore(context, backup_info, restore_location)
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self.app._apply_post_restore_updates(backup_info)
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except Exception as e:
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LOG.error(e)
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LOG.error(_("Error performing restore from backup %s.") %
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backup_info['id'])
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self.app.status.set_status(trove_instance.ServiceStatuses.FAILED)
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raise
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LOG.info(_("Restored database successfully."))
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def create_backup(self, context, backup_info):
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"""
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Entry point for initiating a backup for this instance.
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The call currently blocks guestagent until the backup is finished.
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:param backup_info: a dictionary containing the db instance id of the
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backup task, location, type, and other data.
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"""
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backup.backup(context, backup_info)
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def update_overrides(self, context, overrides, remove=False):
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LOG.debug("Updating overrides.")
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if remove:
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self.app.remove_overrides()
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else:
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self.app.update_overrides(context, overrides, remove)
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def apply_overrides(self, context, overrides):
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"""Configuration changes are made in the config YAML file and
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require restart, so this is a no-op.
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"""
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pass
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