Helpers for writing Ops Framework OpenStack Charms
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# Copyright 2020 Canonical Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import ops_openstack.core
# ch_context needed for bluestore validation
import charmhelpers.contrib.openstack.context as ch_context
from ops.model import (
ActiveStatus,
BlockedStatus,
)
class BaseCephClientCharm(ops_openstack.core.OSBaseCharm):
def __init__(self, framework):
super().__init__(framework)
super().register_status_check(self.check_bluestore_compression)
def check_bluestore_compression(self):
try:
self.get_bluestore_compression()
return ActiveStatus()
except ValueError as e:
return BlockedStatus(
'Invalid configuration: {}'.format(str(e)))
@staticmethod
def get_bluestore_compression():
"""Get BlueStore Compression charm configuration if present.
:returns: Dictionary of options suitable for passing on as keyword
arguments or None.
:rtype: Optional[Dict[str,any]]
:raises: ValueError
"""
try:
bluestore_compression = (
ch_context.CephBlueStoreCompressionContext())
bluestore_compression.validate()
except KeyError:
# The charm does not have BlueStore Compression options defined
bluestore_compression = None
if bluestore_compression:
return bluestore_compression.get_kwargs()