Frode Nordahl
552fa0e1ec
Our Ceph packages are distributed along with our OpenStack packages both for distro and UCA. Reactive Ceph charms can thus reuse a large portion of the ``charms.openstack`` library, both for basic package and service management and for default reactive handlers. The new classes are placed in a ``plugins`` directory. First consumer of the ``CephCharm`` class is the ``ceph-rbd-mirror`` charm accompanied by the ``charm-layer-ceph`` layer. Existing reactive charms that consume or provide Ceph services should also be ported to use the base functionality now added to the ``OpenStackCharm`` and ``CephCharm`` base classes (e.g. ``ceph-fs``, ``gnocchi``). Adds support to OpenStackRelationAdapter for passing on properties from Endpoint based interfaces. Change-Id: I86bdd35b301fa39504c5d5af9a2b7d01bfd38768
54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
# Copyright 2019 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 charms_openstack.adapters
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class CephRelationAdapter(charms_openstack.adapters.OpenStackRelationAdapter):
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"""
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Adapter class for Ceph interfaces.
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"""
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# NOTE(fnordahl): the ``interface_type`` variable holds informational value
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# only. This relation adapter can be used with any interface that
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# provides the properties or functions referenced in this class.
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interface_type = "ceph-mon"
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@property
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def monitors(self):
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"""
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Provide comma separated list of hosts that should be used
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to access Ceph.
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The mon_hosts function in Ceph interfaces tend to return a list or
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generator object.
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We need a comma separated string for use in our configuration
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templates.
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The sorting is important to avoid service restarts just because
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of entries changing order in the returned data.
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NOTE(fnordahl): Adapted from jamesapage's adapter in ``charm-gnocchi``
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:returns: comma separated string with Ceph monitor hosts
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:rtype: str
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"""
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hosts = sorted(self.relation.mon_hosts())
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if len(hosts) > 0:
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return ','.join(hosts)
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else:
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return ''
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