158 lines
4.8 KiB
Python
158 lines
4.8 KiB
Python
#
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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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import functools
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import glanceclient
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import novaclient
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from novaclient import api_versions
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from novaclient import client as nova_client
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from oslo_config import cfg
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from oslo_log import log
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from ceilometer import keystone_client
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SERVICE_OPTS = [
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cfg.StrOpt('nova',
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default='compute',
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help='Nova service type.'),
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]
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LOG = log.getLogger(__name__)
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def logged(func):
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@functools.wraps(func)
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def with_logging(*args, **kwargs):
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try:
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return func(*args, **kwargs)
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except Exception as e:
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LOG.exception(e)
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raise
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return with_logging
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class Client(object):
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"""A client which gets information via python-novaclient."""
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def __init__(self, conf):
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"""Initialize a nova client object."""
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creds = conf.service_credentials
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ks_session = keystone_client.get_session(conf)
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self.nova_client = nova_client.Client(
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version=api_versions.APIVersion('2.1'),
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session=ks_session,
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# nova adapter options
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region_name=creds.region_name,
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endpoint_type=creds.interface,
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service_type=conf.service_types.nova)
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self.glance_client = glanceclient.Client(
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version='2',
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session=ks_session,
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region_name=creds.region_name,
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interface=creds.interface,
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service_type=conf.service_types.glance)
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def _with_flavor_and_image(self, instances):
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flavor_cache = {}
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image_cache = {}
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for instance in instances:
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self._with_flavor(instance, flavor_cache)
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self._with_image(instance, image_cache)
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return instances
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def _with_flavor(self, instance, cache):
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fid = instance.flavor['id']
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if fid in cache:
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flavor = cache.get(fid)
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else:
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try:
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flavor = self.nova_client.flavors.get(fid)
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except novaclient.exceptions.NotFound:
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flavor = None
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cache[fid] = flavor
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attr_defaults = [('name', 'unknown-id-%s' % fid),
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('vcpus', 0), ('ram', 0), ('disk', 0),
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('ephemeral', 0)]
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for attr, default in attr_defaults:
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if not flavor:
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instance.flavor[attr] = default
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continue
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instance.flavor[attr] = getattr(flavor, attr, default)
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def _with_image(self, instance, cache):
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try:
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iid = instance.image['id']
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except TypeError:
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instance.image = None
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instance.kernel_id = None
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instance.ramdisk_id = None
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return
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if iid in cache:
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image = cache.get(iid)
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else:
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try:
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image = self.glance_client.images.get(iid)
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except glanceclient.exc.HTTPNotFound:
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image = None
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cache[iid] = image
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attr_defaults = [('kernel_id', None),
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('ramdisk_id', None)]
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instance.image['name'] = (
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getattr(image, 'name') if image else 'unknown-id-%s' % iid)
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image_metadata = getattr(image, 'metadata', None)
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for attr, default in attr_defaults:
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ameta = image_metadata.get(attr) if image_metadata else default
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setattr(instance, attr, ameta)
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@logged
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def instance_get_all_by_host(self, hostname, since=None):
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"""Returns list of instances on particular host.
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If since is supplied, it will return the instances changed since that
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datetime. since should be in ISO Format '%Y-%m-%dT%H:%M:%SZ'
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"""
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search_opts = {'host': hostname, 'all_tenants': True}
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if since:
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search_opts['changes-since'] = since
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return self._with_flavor_and_image(self.nova_client.servers.list(
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detailed=True,
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search_opts=search_opts))
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@logged
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def instance_get_all(self, since=None):
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"""Returns list of all instances.
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If since is supplied, it will return the instances changes since that
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datetime. since should be in ISO Format '%Y-%m-%dT%H:%M:%SZ'
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"""
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search_opts = {'all_tenants': True}
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if since:
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search_opts['changes-since'] = since
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return self.nova_client.servers.list(
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detailed=True,
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search_opts=search_opts)
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