async def get_backup_details(request):
""" Returns the details of a backup
:Example: curl -X GET http://localhost:8081/foglamp/backup/1
"""
backup_id = request.match_info.get('backup_id', None)
try:
backup_id = int(backup_id)
backup = Backup(connect.get_storage_async())
backup_json = await backup.get_backup_details(backup_id)
resp = {
"status": _get_status(int(backup_json["status"])),
'id': backup_json["id"],
'date': backup_json["ts"]
}
except ValueError:
raise web.HTTPBadRequest(reason='Invalid backup id')
except exceptions.DoesNotExist:
raise web.HTTPNotFound(
reason='Backup id {} does not exist'.format(backup_id))
except Exception as ex:
raise web.HTTPException(reason=(str(ex)))
return web.json_response(resp)
async def get_backup_download(request):
""" Download back up file by id
:Example:
wget -O foglamp-backup-1.tar.gz http://localhost:8081/foglamp/backup/1/download
"""
backup_id = request.match_info.get('backup_id', None)
try:
backup_id = int(backup_id)
backup = Backup(connect.get_storage_async())
backup_json = await backup.get_backup_details(backup_id)
# Strip filename from backup path
file_name_path = str(backup_json["file_name"]).split('data/backup/')
file_name = str(file_name_path[1])
dir_name = _FOGLAMP_DATA + '/backup/' if _FOGLAMP_DATA else _FOGLAMP_ROOT + "/data/backup/"
source = dir_name + file_name
# Create tar file
t = tarfile.open(source + ".tar.gz", "w:gz")
t.add(source, arcname=os.path.basename(source))
t.close()
# Path of tar.gz file
gz_path = Path(source + ".tar.gz")
except ValueError:
raise web.HTTPBadRequest(reason='Invalid backup id')
except exceptions.DoesNotExist:
raise web.HTTPNotFound(reason='Backup id {} does not exist'.format(backup_id))
except Exception as ex:
raise web.HTTPInternalServerError(reason=(str(ex)))
return web.FileResponse(path=gz_path)
def __init__(self):
super().__init__()
if not self._logger:
self._logger = logger.setup(self._MODULE_NAME,
destination=_LOGGER_DESTINATION,
level=_LOGGER_LEVEL)
self._backup = Backup(self._storage_async)
self._backup_lib = lib.BackupRestoreLib(self._storage_async,
self._logger)
self._job = lib.Job()
# Creates the objects references used by the library
lib._logger = self._logger
lib._storage = self._storage_async
async def create_backup(request):
""" Creates a backup
:Example: curl -X POST http://localhost:8081/foglamp/backup
"""
try:
backup = Backup(connect.get_storage_async())
status = await backup.create_backup()
except Exception as ex:
raise web.HTTPException(reason=str(ex))
return web.json_response({"status": status})
async def get_backups(request):
""" Returns a list of all backups
:Example: curl -X GET http://localhost:8081/foglamp/backup
:Example: curl -X GET http://localhost:8081/foglamp/backup?limit=2&skip=1&status=completed
"""
limit = __DEFAULT_LIMIT
if 'limit' in request.query and request.query['limit'] != '':
try:
limit = int(request.query['limit'])
if limit < 0:
raise ValueError
except ValueError:
raise web.HTTPBadRequest(reason="Limit must be a positive integer")
skip = __DEFAULT_OFFSET
if 'skip' in request.query and request.query['skip'] != '':
try:
skip = int(request.query['skip'])
if skip < 0:
raise ValueError
except ValueError:
raise web.HTTPBadRequest(
reason="Skip/Offset must be a positive integer")
status = None
if 'status' in request.query and request.query['status'] != '':
try:
status = Status[request.query['status'].upper()].value
except KeyError as ex:
raise web.HTTPBadRequest(
reason="{} is not a valid status".format(ex))
try:
backup = Backup(connect.get_storage_async())
backup_json = await backup.get_all_backups(limit=limit,
skip=skip,
status=status)
res = []
for row in backup_json:
r = OrderedDict()
r["id"] = row["id"]
r["date"] = row["ts"]
r["status"] = _get_status(int(row["status"]))
res.append(r)
except Exception as ex:
raise web.HTTPException(reason=str(ex))
return web.json_response({"backups": res})
async def delete_backup(request):
""" Delete a backup
:Example: curl -X DELETE http://localhost:8081/foglamp/backup/1
"""
backup_id = request.match_info.get('backup_id', None)
try:
backup_id = int(backup_id)
backup = Backup(connect.get_storage_async())
await backup.delete_backup(backup_id)
return web.json_response({'message': "Backup deleted successfully"})
except ValueError:
raise web.HTTPBadRequest(reason='Invalid backup id')
except exceptions.DoesNotExist:
raise web.HTTPNotFound(reason='Backup id {} does not exist'.format(backup_id))
except Exception as ex:
raise web.HTTPException(reason=str(ex))
class BackupProcess(FoglampProcess):
""" Backups the entire FogLAMP repository into a file in the local filesystem,
it executes a full warm backup
"""
_MODULE_NAME = "foglamp_backup_sqlite_process"
_BACKUP_FILE_NAME_PREFIX = "foglamp_backup_"
""" Prefix used to generate a backup file name """
_MESSAGES_LIST = {
# Information messages
"i000001":
"Execution started.",
"i000002":
"Execution completed.",
# Warning / Error messages
"e000000":
"general error",
"e000001":
"cannot initialize the logger - error details |{0}|",
"e000002":
"cannot retrieve the configuration from the manager, trying retrieving from file "
"- error details |{0}|",
"e000003":
"cannot retrieve the configuration from file - error details |{0}|",
"e000004":
"...",
"e000005":
"...",
"e000006":
"...",
"e000007":
"backup failed.",
"e000008":
"cannot execute the backup, either a backup or a restore is already running - pid |{0}|",
"e000009":
"...",
"e000010":
"directory used to store backups doesn't exist - dir |{0}|",
"e000011":
"directory used to store semaphores for backup/restore synchronization doesn't exist - dir |{0}|",
"e000012":
"cannot create the configuration cache file, neither FOGLAMP_DATA nor FOGLAMP_ROOT are defined.",
"e000013":
"cannot create the configuration cache file, provided path is not a directory - dir |{0}|",
"e000014":
"the identified path of backups doesn't exists, creation was tried "
"- dir |{0}| - error details |{1}|",
"e000015":
"The command is not available neither using the unmanaged approach"
" - command |{0}|",
"e000019":
"The command is not available using the managed approach"
" - command |{0}|",
}
""" Messages used for Information, Warning and Error notice """
_logger = None
def __init__(self):
super().__init__()
if not self._logger:
self._logger = logger.setup(self._MODULE_NAME,
destination=_LOGGER_DESTINATION,
level=_LOGGER_LEVEL)
self._backup = Backup(self._storage_async)
self._backup_lib = lib.BackupRestoreLib(self._storage_async,
self._logger)
self._job = lib.Job()
# Creates the objects references used by the library
lib._logger = self._logger
lib._storage = self._storage_async
def _generate_file_name(self):
""" Generates the file name for the backup operation, it uses hours/minutes/seconds for the file name generation
Args:
Returns:
_backup_file: generated file name
Raises:
"""
self._logger.debug("{func}".format(func="_generate_file_name"))
# Evaluates the parameters
execution_time = time.strftime("%Y_%m_%d_%H_%M_%S")
full_file_name = self._backup_lib.dir_backups + "/" + self._BACKUP_FILE_NAME_PREFIX + execution_time
ext = "db"
_backup_file = "{file}.{ext}".format(file=full_file_name, ext=ext)
return _backup_file
def check_for_execution_backup(self):
""" Executes all the checks to ensure the prerequisites to execute the backup are met
Args:
Returns:
Raises:
"""
def init(self):
""" Setups the correct state for the execution of the backup
Args:
Returns:
Raises:
exceptions.BackupOrRestoreAlreadyRunning
"""
self._logger.debug("{func}".format(func="init"))
self._backup_lib.evaluate_paths()
self._backup_lib.retrieve_configuration()
self.check_for_execution_backup()
# Checks for backup/restore synchronization
pid = self._job.is_running()
if pid == 0:
# no job is running
pid = os.getpid()
self._job.set_as_running(self._backup_lib.JOB_SEM_FILE_BACKUP, pid)
else:
_message = self._MESSAGES_LIST["e000008"].format(pid)
self._logger.warning("{0}".format(_message))
raise exceptions.BackupOrRestoreAlreadyRunning
def execute_backup(self):
""" Executes the backup functionality
Args:
Returns:
Raises:
exceptions.BackupFailed
"""
self._logger.debug("{func}".format(func="execute_backup"))
self._purge_old_backups()
backup_file = self._generate_file_name()
self._backup_lib.sl_backup_status_create(backup_file,
lib.BackupType.FULL,
lib.BackupStatus.RUNNING)
status, exit_code = self._run_backup_command(backup_file)
backup_information = self._backup_lib.sl_get_backup_details_from_file_name(
backup_file)
self._backup_lib.sl_backup_status_update(backup_information['id'],
status, exit_code)
audit = AuditLogger(self._storage_async)
loop = asyncio.get_event_loop()
if status != lib.BackupStatus.COMPLETED:
self._logger.error(self._MESSAGES_LIST["e000007"])
loop.run_until_complete(
audit.information('BKEXC', {'status': 'failed'}))
raise exceptions.BackupFailed
else:
loop.run_until_complete(
audit.information('BKEXC', {'status': 'completed'}))
def _purge_old_backups(self):
""" Deletes old backups in relation at the retention parameter
Args:
Returns:
Raises:
"""
backups_info = asyncio.get_event_loop().run_until_complete(
self._backup.get_all_backups(
self._backup_lib.MAX_NUMBER_OF_BACKUPS_TO_RETRIEVE, 0, None,
lib.SortOrder.ASC))
# Evaluates which backup should be deleted
backups_n = len(backups_info)
# -1 so at the end of the current backup up to 'retention' backups will be available
last_to_delete = backups_n - (self._backup_lib.config['retention'] - 1)
if last_to_delete > 0:
# Deletes backups
backups_to_delete = backups_info[:last_to_delete]
for row in backups_to_delete:
backup_id = row['id']
file_name = row['file_name']
self._logger.debug(
"{func} - id |{id}| - file_name |{file}|".format(
func="_purge_old_backups",
id=backup_id,
file=file_name))
asyncio.get_event_loop().run_until_complete(
self._backup.delete_backup(backup_id))
def _run_backup_command(self, _backup_file):
""" Backups the entire FogLAMP repository into a file in the local file system
Args:
_backup_file: backup file to create as a full path
Returns:
_status: status of the backup
_exit_code: exit status of the operation, 0=Successful
Raises:
"""
self._logger.debug("{func} - file_name |{file}|".format(
func="_run_backup_command", file=_backup_file))
# Force the checkpoint - WAL mechanism
cmd = "{sqlite_cmd} {path}/{db} 'PRAGMA wal_checkpoint(PASSIVE);'".format(
sqlite_cmd=self._backup_lib.SQLITE_SQLITE,
path=self._backup_lib.dir_foglamp_data,
db=self._backup_lib.config['database-filename'])
# noinspection PyArgumentEqualDefault
_exit_code, output = lib.exec_wait_retry(
cmd,
output_capture=True,
exit_code_ok=0,
max_retry=self._backup_lib.config['max_retry'],
timeout=self._backup_lib.config['timeout'])
# Prepares the backup command
cmd = "{sqlite_cmd} {path}/{db} '{backup_cmd} {file}'".format(
sqlite_cmd=self._backup_lib.SQLITE_SQLITE,
path=self._backup_lib.dir_foglamp_data,
db=self._backup_lib.config['database-filename'],
backup_cmd=self._backup_lib.SQLITE_BACKUP,
file=_backup_file)
# Executes the backup waiting for the completion and using a retry mechanism
# noinspection PyArgumentEqualDefault
_exit_code, output = lib.exec_wait_retry(
cmd,
output_capture=True,
exit_code_ok=0,
max_retry=self._backup_lib.config['max_retry'],
timeout=self._backup_lib.config['timeout'])
if _exit_code == 0:
_status = lib.BackupStatus.COMPLETED
else:
_status = lib.BackupStatus.FAILED
self._logger.debug(
"{func} - status |{status}| - exit_code |{exit_code}| "
"- cmd |{cmd}| output |{output}| ".format(
func="_run_backup_command",
status=_status,
exit_code=_exit_code,
cmd=cmd,
output=output))
return _status, _exit_code
def shutdown(self):
""" Sets the correct state to terminate the execution
Args:
Returns:
Raises:
"""
self._logger.debug("{func}".format(func="shutdown"))
self._job.set_as_completed(self._backup_lib.JOB_SEM_FILE_BACKUP)
def run(self):
""" Creates a new backup
Args:
Returns:
Raises:
"""
self.init()
try:
self.execute_backup()
except Exception as _ex:
_message = _MESSAGES_LIST["e000002"].format(_ex)
_logger.error(_message)
self.shutdown()
raise exceptions.RestoreFailed(_message)
else:
self.shutdown()