362 lines
14 KiB
Python
362 lines
14 KiB
Python
"""
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(c) Copyright 2014,2015 Hewlett-Packard Development Company, L.P.
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(C) Copyright 2016 Hewlett Packard Enterprise Development Company LP
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 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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"""
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import abc
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import datetime
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import os
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import sys
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import time
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from oslo_config import cfg
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from oslo_log import log
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from oslo_utils import importutils
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import six
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from freezer.openstack import backup
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from freezer.openstack import restore
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from freezer.snapshot import snapshot
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from freezer.utils import checksum
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from freezer.utils import exec_cmd
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from freezer.utils import utils
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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@six.add_metaclass(abc.ABCMeta)
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class Job(object):
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"""
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:type storage: freezer.storage.base.Storage
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:type engine: freezer.engine.engine.BackupEngine
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"""
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def __init__(self, conf_dict, storage):
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self.conf = conf_dict
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self.storage = storage
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self.engine = conf_dict.engine
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self._general_validation()
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self._validate()
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@abc.abstractmethod
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def _validate(self):
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"""
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Method that validates if all arguments available to execute the job
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or not
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:return: True or raise an error
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"""
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pass
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def _general_validation(self):
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"""
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Apply general validation rules.
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:return: True or raise an error
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"""
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LOG.info("Validating args for the {0} job.".format(self.conf.action))
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if not self.conf.action:
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raise ValueError("Please provide a valid action with --action")
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if self.conf.action in ('backup', 'restore', 'admin') \
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and self.conf.backup_media == 'fs' \
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and not self.conf.backup_name:
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raise ValueError('A value for --backup-name is required')
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@abc.abstractmethod
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def execute(self):
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pass
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class InfoJob(Job):
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def _validate(self):
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# no validation required for this job
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pass
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def execute(self):
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self.storage.info()
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class BackupJob(Job):
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def _validate(self):
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if self.conf.mode == 'fs':
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if not self.conf.path_to_backup:
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raise ValueError('path-to-backup argument must be provided')
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if self.conf.no_incremental and (self.conf.max_level or
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self.conf.always_level):
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raise Exception(
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'no-incremental option is not compatible '
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'with backup level options')
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def execute(self):
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LOG.info('Backup job started. '
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'backup_name: {0}, container: {1}, hostname: {2}, mode: {3},'
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' Storage: {4}, compression: {5}'
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.format(self.conf.backup_name, self.conf.container,
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self.conf.hostname, self.conf.mode, self.conf.storage,
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self.conf.compression))
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try:
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if self.conf.mode is 'fs' and self.conf.sync:
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LOG.info('Executing sync to flush the file system buffer.')
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(out, err) = utils.create_subprocess('sync')
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if err:
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LOG.error('Error while sync exec: {0}'.format(err))
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except Exception as error:
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LOG.error('Error while sync exec: {0}'.format(error))
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if not self.conf.mode:
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raise ValueError("Empty mode")
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mod_name = 'freezer.mode.{0}.{1}'.format(
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self.conf.mode, self.conf.mode.capitalize() + 'Mode')
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app_mode = importutils.import_object(mod_name, self.conf)
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backup_level = self.backup(app_mode)
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level = backup_level or 0
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metadata = {
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'curr_backup_level': level,
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'fs_real_path': self.conf.path_to_backup,
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'vol_snap_path': self.conf.path_to_backup,
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'client_os': sys.platform,
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'client_version': self.conf.__version__,
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'time_stamp': self.conf.time_stamp,
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}
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fields = ['action',
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'always_level',
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'backup_media',
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'backup_name',
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'container',
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'container_segments',
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'dry_run',
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'hostname',
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'path_to_backup',
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'max_level',
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'mode',
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'backup_name',
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'time_stamp',
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'log_file',
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'storage',
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'mode',
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'os_auth_version',
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'proxy',
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'compression',
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'ssh_key',
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'ssh_username',
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'ssh_host',
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'ssh_port',
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'consistency_checksum'
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]
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for field_name in fields:
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metadata[field_name] = self.conf.__dict__.get(field_name, '') or ''
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return metadata
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def backup(self, app_mode):
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"""
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:type app_mode: freezer.mode.mode.Mode
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:return:
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"""
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backup_media = self.conf.backup_media
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time_stamp = utils.DateTime.now().timestamp
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self.conf.time_stamp = time_stamp
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if backup_media == 'fs':
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LOG.info('Path to backup: {0}'.format(self.conf.path_to_backup))
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app_mode.prepare()
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snapshot_taken = snapshot.snapshot_create(self.conf)
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if snapshot_taken:
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app_mode.release()
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try:
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filepath = '.'
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chdir_path = os.path.expanduser(
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os.path.normpath(self.conf.path_to_backup.strip()))
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if not os.path.exists(chdir_path):
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msg = 'Path to backup does not exist {0}'.format(
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chdir_path)
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LOG.critical(msg)
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raise IOError(msg)
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if not os.path.isdir(chdir_path):
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filepath = os.path.basename(chdir_path)
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chdir_path = os.path.dirname(chdir_path)
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os.chdir(chdir_path)
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# Checksum for Backup Consistency
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if self.conf.consistency_check:
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ignorelinks = (self.conf.dereference_symlink == 'none' or
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self.conf.dereference_symlink == 'hard')
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consistency_checksum = checksum.CheckSum(
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filepath, ignorelinks=ignorelinks).compute()
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LOG.info('Computed checksum for consistency {0}'.
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format(consistency_checksum))
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self.conf.consistency_checksum = consistency_checksum
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return self.engine.backup(
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backup_path=filepath,
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hostname_backup_name=self.conf.hostname_backup_name,
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no_incremental=self.conf.no_incremental,
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max_level=self.conf.max_level,
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always_level=self.conf.always_level,
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restart_always_level=self.conf.restart_always_level)
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finally:
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# whether an error occurred or not, remove the snapshot anyway
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app_mode.release()
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if snapshot_taken:
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snapshot.snapshot_remove(
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self.conf, self.conf.shadow,
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self.conf.windows_volume)
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backup_os = backup.BackupOs(self.conf.client_manager,
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self.conf.container,
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self.storage)
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if backup_media == 'nova':
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LOG.info('Executing nova backup. Instance ID: {0}'.format(
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self.conf.nova_inst_id))
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backup_os.backup_nova(self.conf.nova_inst_id)
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elif backup_media == 'cindernative':
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LOG.info('Executing cinder native backup. Volume ID: {0}, '
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'incremental: {1}'.format(self.conf.cindernative_vol_id,
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self.conf.incremental))
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backup_os.backup_cinder(self.conf.cindernative_vol_id,
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name=self.conf.backup_name,
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incremental=self.conf.incremental)
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elif backup_media == 'cinder':
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LOG.info('Executing cinder snapshot. Volume ID: {0}'.format(
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self.conf.cinder_vol_id))
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backup_os.backup_cinder_by_glance(self.conf.cinder_vol_id)
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else:
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raise Exception('unknown parameter backup_media %s' % backup_media)
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return None
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class RestoreJob(Job):
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def _validate(self):
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if not self.conf.restore_abs_path and not self.conf.nova_inst_id \
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and not self.conf.cinder_vol_id and not \
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self.conf.cindernative_vol_id:
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raise ValueError("--restore-abs-path is required")
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if not self.conf.container:
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raise ValueError("--container is required")
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if self.conf.no_incremental and (self.conf.max_level or
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self.conf.always_level):
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raise Exception(
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'no-incremental option is not compatible '
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'with backup level options')
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def execute(self):
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conf = self.conf
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LOG.info('Executing Restore...')
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restore_timestamp = None
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restore_abs_path = conf.restore_abs_path
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if conf.restore_from_date:
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restore_timestamp = utils.date_to_timestamp(conf.restore_from_date)
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if conf.backup_media == 'fs':
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self.engine.restore(
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hostname_backup_name=self.conf.hostname_backup_name,
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restore_path=restore_abs_path,
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overwrite=conf.overwrite,
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recent_to_date=restore_timestamp)
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try:
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if conf.consistency_checksum:
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backup_checksum = conf.consistency_checksum
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restore_checksum = checksum.CheckSum(restore_abs_path,
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ignorelinks=True)
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if restore_checksum.compare(backup_checksum):
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LOG.info('Consistency check success.')
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else:
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raise ConsistencyCheckException(
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"Backup Consistency Check failed: backup checksum "
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"({0}) and restore checksum ({1}) did not match.".
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format(backup_checksum, restore_checksum.checksum))
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except OSError as e:
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raise ConsistencyCheckException(
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"Backup Consistency Check failed: could not checksum file"
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" {0} ({1})".format(e.filename, e.strerror))
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return {}
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res = restore.RestoreOs(conf.client_manager, conf.container,
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self.storage)
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if conf.backup_media == 'nova':
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LOG.info("Restoring nova backup. Instance ID: {0}, timestamp: {1} "
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"network-id {2}".format(conf.nova_inst_id,
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restore_timestamp,
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conf.nova_network_id))
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res.restore_nova(conf.nova_inst_id, restore_timestamp,
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conf.nova_network_id)
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elif conf.backup_media == 'cinder':
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LOG.info("Restoring cinder backup from glance. Volume ID: {0}, "
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"timestamp: {1}".format(conf.cinder_vol_id,
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restore_timestamp))
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res.restore_cinder_by_glance(conf.cinder_vol_id, restore_timestamp)
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elif conf.backup_media == 'cindernative':
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LOG.info("Restoring cinder native backup. Volume ID {0}, Backup ID"
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" {1}, timestamp: {2}".format(conf.cindernative_vol_id,
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conf.cindernative_backup_id,
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restore_timestamp))
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res.restore_cinder(conf.cindernative_vol_id,
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conf.cindernative_backup_id,
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restore_timestamp)
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else:
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raise Exception("unknown backup type: %s" % conf.backup_media)
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return {}
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class AdminJob(Job):
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def _validate(self):
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# no validation required in this job
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if not self.conf.remove_from_date and not self.conf.remove_older_than:
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raise ValueError("You need to provide to remove backup older "
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"than this time. You can use --remove-older-than "
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"or --remove-from-date")
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def execute(self):
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if self.conf.remove_from_date:
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timestamp = utils.date_to_timestamp(self.conf.remove_from_date)
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else:
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timestamp = datetime.datetime.now() - \
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datetime.timedelta(days=self.conf.remove_older_than)
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timestamp = int(time.mktime(timestamp.timetuple()))
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self.storage.remove_older_than(self.engine,
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timestamp,
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self.conf.hostname_backup_name)
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return {}
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class ExecJob(Job):
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def _validate(self):
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if not self.conf.command:
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raise ValueError("--command option is required")
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def execute(self):
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if self.conf.command:
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LOG.info('Executing exec job. Command: {0}'
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.format(self.conf.command))
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exec_cmd.execute(self.conf.command)
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else:
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LOG.warning(
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'No command info options were set. Exiting.')
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return {}
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class ConsistencyCheckException(Exception):
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pass
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