d1714de91e
For releases prior to ocata, the volume_driver key must be provided by the CephContext to ensure that a single driver is set for cinder. Specialize behaviour for >= ocata only, resolving issues with pre ocata deployments with direct relations to ceph. Change-Id: I9ff47853ab0726ed5c77c67f21f873349bc64f7b
255 lines
8.3 KiB
Python
255 lines
8.3 KiB
Python
# Copyright 2016 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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from charmhelpers.core.hookenv import (
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config,
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relation_ids,
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service_name,
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related_units,
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relation_get,
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log,
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WARNING,
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)
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from charmhelpers.contrib.openstack.context import (
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OSContextGenerator,
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ApacheSSLContext as SSLContext,
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SubordinateConfigContext,
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)
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from charmhelpers.contrib.openstack.utils import (
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os_release,
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)
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from charmhelpers.contrib.hahelpers.cluster import (
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determine_apache_port,
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determine_api_port,
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)
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def enable_lvm():
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"""Check whether the LVM backend should be configured
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@returns boolean - If LVM should be enabled"""
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block_device = config('block-device') or 'none'
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return block_device.lower() != 'none'
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class ImageServiceContext(OSContextGenerator):
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interfaces = ['image-service']
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def __call__(self):
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if not relation_ids('image-service'):
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return {}
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return {'glance_api_version': config('glance-api-version')}
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class CephContext(OSContextGenerator):
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interfaces = ['ceph-cinder']
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def __call__(self):
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"""Used to generate template context to be added to cinder.conf in the
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presence of a ceph relation.
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"""
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# TODO(this should call is_relation_made)
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if not relation_ids('ceph'):
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return {}
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service = service_name()
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if os_release('cinder-common') >= "icehouse":
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volume_driver = 'cinder.volume.drivers.rbd.RBDDriver'
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else:
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volume_driver = 'cinder.volume.driver.RBDDriver'
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if os_release('cinder-common') >= "ocata":
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driver_key = 'ceph_volume_driver'
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else:
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driver_key = 'volume_driver'
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return {
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driver_key: volume_driver,
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# ensure_ceph_pool() creates pool based on service name.
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'rbd_pool': service,
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'rbd_user': service,
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'host': service
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}
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class HAProxyContext(OSContextGenerator):
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interfaces = ['cinder-haproxy']
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def __call__(self):
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'''Extends the main charmhelpers HAProxyContext with a port mapping
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specific to this charm.
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Also used to extend cinder.conf context with correct api_listening_port
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'''
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haproxy_port = config('api-listening-port')
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api_port = determine_api_port(config('api-listening-port'),
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singlenode_mode=True)
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apache_port = determine_apache_port(config('api-listening-port'),
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singlenode_mode=True)
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ctxt = {
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'service_ports': {'cinder_api': [haproxy_port, apache_port]},
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'osapi_volume_listen_port': api_port,
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'port': api_port,
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}
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return ctxt
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class ApacheSSLContext(SSLContext):
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interfaces = ['https']
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external_ports = [8776]
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service_namespace = 'cinder'
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def __call__(self):
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# late import to work around circular dependency
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from cinder_utils import service_enabled
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if not service_enabled('cinder-common'):
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return {}
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return super(ApacheSSLContext, self).__call__()
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class StorageBackendContext(OSContextGenerator):
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interfaces = ['storage-backend']
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def __call__(self):
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backends = []
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for rid in relation_ids('storage-backend'):
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for unit in related_units(rid):
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backend_name = relation_get('backend_name',
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unit, rid)
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if backend_name:
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backends.append(backend_name)
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# Ocata onwards all backends must be in there own sectional config
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if os_release('cinder-common') >= "ocata":
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if relation_ids('ceph'):
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backends.append('CEPH')
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if enable_lvm():
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backends.append('LVM')
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if len(backends) > 0:
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return {
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'active_backends': backends,
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'backends': ",".join(backends)}
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else:
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return {}
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class LoggingConfigContext(OSContextGenerator):
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def __call__(self):
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return {'debug': config('debug'), 'verbose': config('verbose')}
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class CinderSubordinateConfigContext(SubordinateConfigContext):
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def __call__(self):
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ctxt = super(CinderSubordinateConfigContext, self).__call__()
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# If all backends are stateless we can allow host setting to be set
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# across hosts/units to allow for HA volume failover but otherwise we
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# have to leave it as unique (LP: #1493931).
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rids = []
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for interface in self.interfaces:
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rids.extend(relation_ids(interface))
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stateless = None
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any_stateless = False
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for rid in rids:
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for unit in related_units(rid):
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val = relation_get('stateless', rid=rid, unit=unit) or ""
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if val.lower() == 'true':
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if stateless is None:
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stateless = True
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else:
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stateless = stateless and True
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else:
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stateless = False
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any_stateless = any_stateless or stateless
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if stateless:
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if 'DEFAULT' in ctxt['sections']:
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ctxt['sections']['DEFAULT'].append(('host', service_name()))
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else:
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ctxt['sections']['DEFAULT'] = [('host', service_name())]
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elif any_stateless:
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log("One or more stateless backends configured but unable to "
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"set host param since there appear to also be stateful "
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"backends configured.", level=WARNING)
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return ctxt
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class RegionContext(OSContextGenerator):
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"""Provides context data regarding the region the service is in.
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This context provides the region that is configured by the admin via the
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region option in the config settings for the charm. If no region config
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is available, then this will provide an empty context.
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"""
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def __call__(self):
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region = config('region')
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if region:
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return {'region': region}
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else:
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return {}
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class SectionalConfigContext(OSContextGenerator):
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"""Using DEFAULT config section to configure backends cannot be used
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with Ocata+. In this case each backend needs its own section
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@returns dict - Context dictating if sectional config needs to be used
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"""
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def __call__(self):
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return {
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'sectional_default_config': os_release('cinder-common') >= "ocata"
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}
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class LVMContext(OSContextGenerator):
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"""Context describing the configuration of the LVM backend
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@returns dict - Context describing LVM config
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"""
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def __call__(self):
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ctxt = {}
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if enable_lvm():
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ctxt = {
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'volumes_dir': '/var/lib/cinder/volumes',
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'volume_name_template': 'volume-%s',
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'volume_group': config('volume-group'),
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'volume_driver': 'cinder.volume.drivers.lvm.LVMVolumeDriver',
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'volume_backend_name': 'LVM'}
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return ctxt
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class VolumeUsageAuditContext(OSContextGenerator):
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"""This context provides the configuration directive
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volume_usage_audit_period and also creates a crontab entry
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for running the cinder-volume-usage-audit script recurrently.
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"""
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DEFAULT_CRONTAB_PATH = '/etc/cron.d/cinder-volume-usage-audit'
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def __call__(self):
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log("Installing crontab: %s" % self.DEFAULT_CRONTAB_PATH)
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with open(self.DEFAULT_CRONTAB_PATH, "w+") as crontab:
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# The cinder-volume-usage-audit executable will only gather
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# data that fits on the configured volume-usage-audit-period.
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crontab.write('0 * * * * root '
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'/usr/bin/cinder-volume-usage-audit\n')
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return {
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'volume_usage_audit_period': config("volume-usage-audit-period")
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}
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