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# Copyright 2015 Canonical, Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import logging
import yaml
import os
from probert.storage import (Storage,
StorageInfo)
log = logging.getLogger('subiquitycore.prober')
class ProberException(Exception):
'''Base Prober Exception'''
pass
class Prober():
def __init__(self, opts):
self.opts = opts
self.probe_data = {}
if self.opts.machine_config:
log.debug('User specified machine_config: {}'.format(
self.opts.machine_config))
if os.path.exists(self.opts.machine_config):
self.probe_data = \
self._load_machine_config(self.opts.machine_config)
log.debug('Prober() init finished, data:{}'.format(self.probe_data))
def _load_machine_config(self, machine_config):
with open(machine_config) as mc:
try:
data = yaml.safe_load(mc)
except (UnicodeDecodeError, yaml.reader.ReaderError):
err = 'Failed to parse machine config'
log.exception(err)
raise ProberException(err)
return data
def get_storage(self):
''' Load a StorageInfo class. Probe if it's not present '''
if 'storage' not in self.probe_data:
log.debug('get_storage: no storage in probe_data, fetching')
storage = Storage()
results = storage.probe()
self.probe_data['storage'] = results
return self.probe_data['storage']
def get_storage_info(self, device):
''' Load a StorageInfo class for specified device '''
return StorageInfo({device: self.get_storage().get(device)})
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