140 lines
4.6 KiB
Python
140 lines
4.6 KiB
Python
# Copyright 2020 Canonical Ltd
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#
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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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#
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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,
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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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import json
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import ops_openstack.core
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from charmhelpers.fetch import (
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apt_install,
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apt_update,
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add_source
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)
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# ch_context needed for bluestore validation
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import charmhelpers.contrib.openstack.context as ch_context
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from ops.model import (
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ActiveStatus,
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BlockedStatus,
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)
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class BaseCephClientCharm(ops_openstack.core.OSBaseCharm):
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def __init__(self, framework):
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super().__init__(framework)
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super().register_status_check(self.check_bluestore_compression)
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def check_bluestore_compression(self):
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try:
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self.get_bluestore_compression()
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return ActiveStatus()
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except ValueError as e:
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return BlockedStatus(
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'Invalid configuration: {}'.format(str(e)))
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@staticmethod
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def get_bluestore_compression():
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"""Get BlueStore Compression charm configuration if present.
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:returns: Dictionary of options suitable for passing on as keyword
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arguments or None.
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:rtype: Optional[Dict[str,any]]
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:raises: ValueError
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"""
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try:
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bluestore_compression = (
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ch_context.CephBlueStoreCompressionContext())
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bluestore_compression.validate()
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except KeyError:
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# The charm does not have BlueStore Compression options defined
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bluestore_compression = None
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if bluestore_compression:
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return bluestore_compression.get_kwargs()
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class CinderStoragePluginCharm(ops_openstack.core.OSBaseCharm):
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def __init__(self, framework):
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super().__init__(framework)
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self.framework.observe(
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self.on.storage_backend_relation_changed,
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self.on_storage_backend)
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def render_config(self, config, app_name):
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return json.dumps({
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"cinder": {
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"/etc/cinder/cinder.conf": {
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"sections": {app_name: self.cinder_configuration(config)}
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}
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}
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})
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def set_data(self, data, config, app_name):
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"""Inform another charm of the backend name and configuration."""
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data['backend_name'] = app_name
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data['stateless'] = str(self.stateless)
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data['active_active'] = str(self.active_active)
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data['subordinate_configuration'] = self.render_config(
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config, app_name)
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def on_config(self, event):
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config = dict(self.framework.model.config)
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app_name = self.framework.model.app.name
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for relation in self.framework.model.relations.get('storage-backend'):
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self.set_data(relation.data[self.unit], config, app_name)
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self.unit.status = ActiveStatus('Unit is ready')
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def on_install(self, _):
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source = self.model.config.get('driver-source')
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if source:
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add_source(source, self.model.config.get('driver-key'))
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apt_update(fatal=True)
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apt_install(self.PACKAGES, fatal=True)
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self.update_status()
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def on_storage_backend(self, event):
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self.set_data(
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event.relation.data[self.unit],
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self.framework.model.config,
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self.framework.model.app.name)
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def cinder_configuration(self, charm_config):
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"""Entry point for cinder subordinates.
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This method should return a list of 2-element tuples, where the
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first element is the configuration key, and the second, its value."""
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raise NotImplementedError()
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@property
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def stateless(self):
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"""Indicate whether the charm is stateless.
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For more information, see: https://cinderlib.readthedocs.io/en/v0.2.1/topics/serialization.html
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:returns: A boolean value indicating statefulness.
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:rtype: bool
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""" # noqa
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return False
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@property
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def active_active(self):
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"""Indicate active-active support in the charm.
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For more information, see: https://specs.openstack.org/openstack/cinder-specs/specs/mitaka/cinder-volume-active-active-support.html
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:returns: A boolean indicating active-active support.
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:rtype: bool
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""" # noqa
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return False
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