#
# Copyright 2012 New Dream Network, LLC (DreamHost)
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Common code for working with images
"""
from __future__ import absolute_import
import glanceclient
from oslo_config import cfg
from oslo_utils import timeutils
from ceilometer.agent import plugin_base
from ceilometer import keystone_client
from ceilometer import sample
OPTS = [
cfg.IntOpt('glance_page_size',
default=0,
help="Number of items to request in "
"each paginated Glance API request "
"(parameter used by glancecelient). "
"If this is less than or equal to 0, "
"page size is not specified "
"(default value in glanceclient is used)."),
]
SERVICE_OPTS = [
cfg.StrOpt('glance',
default='image',
help='Glance service type.'),
]
cfg.CONF.register_opts(OPTS)
cfg.CONF.register_opts(SERVICE_OPTS, group='service_types')
class _Base(plugin_base.PollsterBase):
@property
def default_discovery(self):
return 'endpoint:%s' % cfg.CONF.service_types.glance
@staticmethod
def get_glance_client(ksclient, endpoint):
# hard-code v1 glance API version selection while v2 API matures
return glanceclient.Client('1',
session=keystone_client.get_session(),
endpoint=endpoint,
auth=ksclient.session.auth)
def _get_images(self, ksclient, endpoint):
client = self.get_glance_client(ksclient, endpoint)
page_size = cfg.CONF.glance_page_size
kwargs = {}
if page_size > 0:
kwargs['page_size'] = page_size
return client.images.list(filters={"is_public": None}, **kwargs)
def _iter_images(self, ksclient, cache, endpoint):
"""Iterate over all images."""
key = '%s-images' % endpoint
if key not in cache:
cache[key] = list(self._get_images(ksclient, endpoint))
return iter(cache[key])
@staticmethod
def extract_image_metadata(image):
return dict((k, getattr(image, k))
for k in
[
"status",
"is_public",
"name",
"deleted",
"container_format",
"created_at",
"disk_format",
"updated_at",
"properties",
"min_disk",
"protected",
"checksum",
"deleted_at",
"min_ram",
"size", ])
[docs]class ImagePollster(_Base):
[docs] def get_samples(self, manager, cache, resources):
for endpoint in resources:
for image in self._iter_images(manager.keystone, cache, endpoint):
yield sample.Sample(
name='image',
type=sample.TYPE_GAUGE,
unit='image',
volume=1,
user_id=None,
project_id=image.owner,
resource_id=image.id,
timestamp=timeutils.utcnow().isoformat(),
resource_metadata=self.extract_image_metadata(image),
)
[docs]class ImageSizePollster(_Base):
[docs] def get_samples(self, manager, cache, resources):
for endpoint in resources:
for image in self._iter_images(manager.keystone, cache, endpoint):
yield sample.Sample(
name='image.size',
type=sample.TYPE_GAUGE,
unit='B',
volume=image.size,
user_id=None,
project_id=image.owner,
resource_id=image.id,
timestamp=timeutils.utcnow().isoformat(),
resource_metadata=self.extract_image_metadata(image),
)