300 lines
12 KiB
Python
300 lines
12 KiB
Python
# Copyright (c) 2013 Rackspace
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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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from oslo_log import log as logging
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from oslo_service import periodic_task
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from trove.common import cfg
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from trove.common import exception
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from trove.common.i18n import _
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from trove.common import instance as rd_instance
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from trove.guestagent import backup
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from trove.guestagent.common import operating_system
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from trove.guestagent.datastore.experimental.redis import service
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from trove.guestagent import dbaas
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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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MANAGER = CONF.datastore_manager
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class Manager(periodic_task.PeriodicTasks):
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"""
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This is the Redis manager class. It is dynamically loaded
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based off of the service_type of the trove instance
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"""
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def __init__(self):
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super(Manager, self).__init__(CONF)
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self._app = service.RedisApp()
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@periodic_task.periodic_task
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def update_status(self, context):
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"""
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Updates the redis trove instance. It is decorated with
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perodic task so it is automatically called every 3 ticks.
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"""
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LOG.debug("Update status called.")
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self._app.status.update()
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def rpc_ping(self, context):
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LOG.debug("Responding to RPC ping.")
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return True
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def change_passwords(self, context, users):
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"""
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Changes the redis instance password,
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it is currently not not implemented.
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"""
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LOG.debug("Change passwords called.")
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raise exception.DatastoreOperationNotSupported(
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operation='change_passwords', datastore=MANAGER)
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def reset_configuration(self, context, configuration):
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"""
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Resets to the default configuration,
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currently this does nothing.
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"""
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LOG.debug("Reset configuration called.")
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self._app.reset_configuration(configuration)
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def _perform_restore(self, backup_info, context, restore_location, app):
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"""Perform a restore on this instance."""
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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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except Exception:
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LOG.exception(_("Error performing restore from backup %s.") %
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backup_info['id'])
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app.status.set_status(rd_instance.ServiceStatuses.FAILED)
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raise
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LOG.info(_("Restored database successfully."))
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def prepare(self, context, packages, databases, memory_mb, users,
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device_path=None, mount_point=None, backup_info=None,
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config_contents=None, root_password=None, overrides=None,
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cluster_config=None, snapshot=None):
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"""
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This is called when the trove instance first comes online.
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It is the first rpc message passed from the task manager.
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prepare handles all the base configuration of the redis instance.
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"""
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try:
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self._app.status.begin_install()
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if device_path:
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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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device.mount(mount_point)
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operating_system.chown(mount_point, 'redis', 'redis',
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as_root=True)
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LOG.debug('Mounted the volume.')
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self._app.install_if_needed(packages)
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LOG.info(_('Writing redis configuration.'))
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self._app.configuration_manager.save_configuration(config_contents)
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self._app.apply_initial_guestagent_configuration()
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if backup_info:
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persistence_dir = self._app.get_working_dir()
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self._perform_restore(backup_info, context, persistence_dir,
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self._app)
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self._app.status.end_install_or_restart()
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else:
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self._app.restart()
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LOG.info(_('Redis instance has been setup and configured.'))
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except Exception:
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LOG.exception(_("Error setting up Redis instance."))
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self._app.status.set_status(rd_instance.ServiceStatuses.FAILED)
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raise RuntimeError("prepare call has failed.")
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def restart(self, context):
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"""
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Restart this redis instance.
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This method is called when the guest agent
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gets a restart message from the taskmanager.
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"""
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LOG.debug("Restart called.")
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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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"""
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Start this redis instance with new conf changes.
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"""
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LOG.debug("Start DB with conf changes called.")
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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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"""
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Stop this redis instance.
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This method is called when the guest agent
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gets a stop message from the taskmanager.
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"""
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LOG.debug("Stop DB called.")
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self._app.stop_db(do_not_start_on_reboot=do_not_start_on_reboot)
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def get_filesystem_stats(self, context, fs_path):
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"""Gets the filesystem stats for the path given."""
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LOG.debug("Get Filesystem Stats.")
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mount_point = CONF.get(
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'mysql' if not MANAGER else MANAGER).mount_point
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return dbaas.get_filesystem_volume_stats(mount_point)
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def create_backup(self, context, backup_info):
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"""Create a backup of the database."""
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LOG.debug("Creating backup.")
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backup.backup(context, backup_info)
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def mount_volume(self, context, device_path=None, mount_point=None):
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device = volume.VolumeDevice(device_path)
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device.mount(mount_point, write_to_fstab=False)
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LOG.debug("Mounted the device %s at the mount point %s." %
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(device_path, mount_point))
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def unmount_volume(self, context, device_path=None, mount_point=None):
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device = volume.VolumeDevice(device_path)
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device.unmount(mount_point)
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LOG.debug("Unmounted the device %s from the mount point %s." %
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(device_path, mount_point))
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def resize_fs(self, context, device_path=None, mount_point=None):
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device = volume.VolumeDevice(device_path)
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device.resize_fs(mount_point)
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LOG.debug("Resized the filesystem at %s." % mount_point)
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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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LOG.debug("Applying overrides.")
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self._app.apply_overrides(self._app.admin, overrides)
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def update_attributes(self, context, username, hostname, user_attrs):
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LOG.debug("Updating attributes.")
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raise exception.DatastoreOperationNotSupported(
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operation='update_attributes', datastore=MANAGER)
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def create_database(self, context, databases):
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LOG.debug("Creating database.")
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raise exception.DatastoreOperationNotSupported(
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operation='create_database', datastore=MANAGER)
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def create_user(self, context, users):
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LOG.debug("Creating user.")
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raise exception.DatastoreOperationNotSupported(
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operation='create_user', datastore=MANAGER)
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def delete_database(self, context, database):
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LOG.debug("Deleting database.")
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raise exception.DatastoreOperationNotSupported(
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operation='delete_database', datastore=MANAGER)
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def delete_user(self, context, user):
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LOG.debug("Deleting user.")
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raise exception.DatastoreOperationNotSupported(
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operation='delete_user', datastore=MANAGER)
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def get_user(self, context, username, hostname):
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LOG.debug("Getting user.")
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raise exception.DatastoreOperationNotSupported(
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operation='get_user', datastore=MANAGER)
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def grant_access(self, context, username, hostname, databases):
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LOG.debug("Granting access.")
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raise exception.DatastoreOperationNotSupported(
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operation='grant_access', datastore=MANAGER)
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def revoke_access(self, context, username, hostname, database):
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LOG.debug("Revoking access.")
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raise exception.DatastoreOperationNotSupported(
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operation='revoke_access', datastore=MANAGER)
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def list_access(self, context, username, hostname):
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LOG.debug("Listing access.")
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raise exception.DatastoreOperationNotSupported(
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operation='list_access', datastore=MANAGER)
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def list_databases(self, context, limit=None, marker=None,
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include_marker=False):
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LOG.debug("Listing databases.")
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raise exception.DatastoreOperationNotSupported(
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operation='list_databases', datastore=MANAGER)
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def list_users(self, context, limit=None, marker=None,
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include_marker=False):
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LOG.debug("Listing users.")
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raise exception.DatastoreOperationNotSupported(
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operation='list_users', datastore=MANAGER)
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def enable_root(self, context):
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LOG.debug("Enabling root.")
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raise exception.DatastoreOperationNotSupported(
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operation='enable_root', datastore=MANAGER)
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def is_root_enabled(self, context):
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LOG.debug("Checking if root is enabled.")
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raise exception.DatastoreOperationNotSupported(
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operation='is_root_enabled', datastore=MANAGER)
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def get_replication_snapshot(self, context, snapshot_info,
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replica_source_config=None):
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LOG.debug("Getting replication snapshot.")
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raise exception.DatastoreOperationNotSupported(
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operation='get_replication_snapshot', datastore=MANAGER)
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def attach_replication_slave(self, context, snapshot, slave_config):
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LOG.debug("Attaching replica.")
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raise exception.DatastoreOperationNotSupported(
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operation='attach_replication_slave', datastore=MANAGER)
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def detach_replica(self, context, for_failover=False):
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LOG.debug("Detaching replica.")
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raise exception.DatastoreOperationNotSupported(
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operation='detach_replica', datastore=MANAGER)
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def get_replica_context(self, context):
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raise exception.DatastoreOperationNotSupported(
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operation='get_replica_context', datastore=MANAGER)
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def make_read_only(self, context, read_only):
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raise exception.DatastoreOperationNotSupported(
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operation='make_read_only', datastore=MANAGER)
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def enable_as_master(self, context, replica_source_config):
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raise exception.DatastoreOperationNotSupported(
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operation='enable_as_master', datastore=MANAGER)
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def get_txn_count(self):
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raise exception.DatastoreOperationNotSupported(
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operation='get_txn_count', datastore=MANAGER)
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def get_latest_txn_id(self):
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raise exception.DatastoreOperationNotSupported(
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operation='get_latest_txn_id', datastore=MANAGER)
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def wait_for_txn(self, txn):
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raise exception.DatastoreOperationNotSupported(
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operation='wait_for_txn', datastore=MANAGER)
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def demote_replication_master(self, context):
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LOG.debug("Demoting replica source.")
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raise exception.DatastoreOperationNotSupported(
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operation='demote_replication_master', datastore=MANAGER)
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