94 lines
3.1 KiB
Python
94 lines
3.1 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2012 New Dream Network, LLC (DreamHost)
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#
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# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Common code for working with instances
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"""
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from oslo.config import cfg
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OPTS = [
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cfg.ListOpt('reserved_metadata_namespace',
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default=['metering.'],
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help='list of metadata prefixes resevred for metering use',
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),
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cfg.IntOpt('reserved_metadata_length',
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default=256,
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help='limit on length of reserved metadata values'),
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]
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cfg.CONF.register_opts(OPTS)
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INSTANCE_PROPERTIES = [
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# Identity properties
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'reservation_id',
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# Type properties
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'architecture',
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# Location properties
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'kernel_id',
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'os_type',
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'ramdisk_id',
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# Capacity properties
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'ephemeral_gb',
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'root_gb']
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def add_reserved_user_metadata(instance, metadata):
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limit = cfg.CONF.reserved_metadata_length
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user_metadata = {}
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for prefix in cfg.CONF.reserved_metadata_namespace:
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md = dict(
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(k[len(prefix):].replace('.', '_'),
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v[:limit] if isinstance(v, basestring) else v)
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for k, v in instance.metadata.items()
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if (k.startswith(prefix) and
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k[len(prefix):].replace('.', '_') not in metadata)
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)
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user_metadata.update(md)
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if user_metadata:
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metadata['user_metadata'] = user_metadata
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return metadata
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def get_metadata_from_object(instance):
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"""Return a metadata dictionary for the instance.
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"""
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metadata = {
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'availability_zone': getattr(instance,
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'OS-EXT-AZ:availability_zone', u''),
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'display_name': instance.name,
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'name': getattr(instance, 'OS-EXT-SRV-ATTR:instance_name', u''),
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'instance_type': (instance.flavor['id'] if instance.flavor else None),
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'disk_gb': (instance.flavor['disk'] if instance.flavor else None),
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'memory_mb': (instance.flavor['ram'] if instance.flavor else None),
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'vcpus': (instance.flavor['vcpus'] if instance.flavor else None),
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'host': instance.hostId,
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# Image properties
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'image_ref': (instance.image['id'] if instance.image else None),
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}
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# Images that come through the conductor API in the nova notifier
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# plugin will not have links.
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if instance.image and instance.image.get('links'):
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metadata['image_ref_url'] = instance.image['links'][0]['href']
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else:
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metadata['image_ref_url'] = None
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for name in INSTANCE_PROPERTIES:
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metadata[name] = getattr(instance, name, u'')
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return add_reserved_user_metadata(instance, metadata)
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