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LOG = logging.getLogger('nova.image.glance')
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FLAGS = flags.FLAGS
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GlanceClient = utils.import_class('glance.client.Client')
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class GlanceImageService(service.BaseImageService):
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"""Provides storage and retrieval of disk image objects within Glance."""
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GLANCE_ONLY_ATTRS = ["size", "location", "disk_format",
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GLANCE_ONLY_ATTRS = ['size', 'location', 'disk_format',
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# NOTE(sirp): Overriding to use _translate_to_service provided by
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self.client = client
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def index(self, context):
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Calls out to Glance for a list of images available
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"""Calls out to Glance for a list of images available."""
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# NOTE(sirp): We need to use `get_images_detailed` and not
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# `get_images` here because we need `is_public` and `properties`
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# included so we can filter by user
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def detail(self, context):
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Calls out to Glance for a list of detailed image information
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"""Calls out to Glance for a list of detailed image information."""
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image_metas = self.client.get_images_detailed()
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for image_meta in image_metas:
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def show(self, context, image_id):
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Returns a dict containing image data for the given opaque image id.
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"""Returns a dict with image data for the given opaque image id."""
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image_meta = self.client.get_image_meta(image_id)
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except glance_exception.NotFound:
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raise exception.NotFound
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raise exception.ImageNotFound(image_id=image_id)
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if not self._is_image_available(context, image_meta):
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raise exception.NotFound
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raise exception.ImageNotFound(image_id=image_id)
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base_image_meta = self._translate_to_base(image_meta)
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return base_image_meta
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def show_by_name(self, context, name):
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Returns a dict containing image data for the given name.
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"""Returns a dict containing image data for the given name."""
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# TODO(vish): replace this with more efficient call when glance
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image_metas = self.detail(context)
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for image_meta in image_metas:
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if name == image_meta.get('name'):
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return image_meta
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raise exception.NotFound
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raise exception.ImageNotFound(image_id=name)
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def get(self, context, image_id, data):
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Calls out to Glance for metadata and data and writes data.
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"""Calls out to Glance for metadata and data and writes data."""
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image_meta, image_chunks = self.client.get_image(image_id)
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except glance_exception.NotFound:
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raise exception.NotFound
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raise exception.ImageNotFound(image_id=image_id)
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for chunk in image_chunks:
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data.write(chunk)
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return base_image_meta
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def create(self, context, image_meta, data=None):
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Store the image data and return the new image id.
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:raises AlreadyExists if the image already exist.
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"""Store the image data and return the new image id.
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:raises: AlreadyExists if the image already exist.
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# Translate Base -> Service
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LOG.debug(_("Creating image in Glance. Metadata passed in %s"),
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LOG.debug(_('Creating image in Glance. Metadata passed in %s'),
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sent_service_image_meta = self._translate_to_service(image_meta)
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LOG.debug(_("Metadata after formatting for Glance %s"),
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LOG.debug(_('Metadata after formatting for Glance %s'),
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sent_service_image_meta)
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recv_service_image_meta = self.client.add_image(
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# Translate Service -> Base
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base_image_meta = self._translate_to_base(recv_service_image_meta)
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LOG.debug(_("Metadata returned from Glance formatted for Base %s"),
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LOG.debug(_('Metadata returned from Glance formatted for Base %s'),
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return base_image_meta
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def update(self, context, image_id, image_meta, data=None):
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"""Replace the contents of the given image with the new data.
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:raises NotFound if the image does not exist.
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:raises: ImageNotFound if the image does not exist.
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# NOTE(vish): show is to check if image is available
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self.show(context, image_id)
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image_meta = self.client.update_image(image_id, image_meta, data)
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except glance_exception.NotFound:
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raise exception.NotFound
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raise exception.ImageNotFound(image_id=image_id)
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base_image_meta = self._translate_to_base(image_meta)
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return base_image_meta
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def delete(self, context, image_id):
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Delete the given image.
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:raises NotFound if the image does not exist.
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"""Delete the given image.
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:raises: ImageNotFound if the image does not exist.
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# NOTE(vish): show is to check if image is available
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self.show(context, image_id)
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result = self.client.delete_image(image_id)
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168
except glance_exception.NotFound:
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raise exception.NotFound
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raise exception.ImageNotFound(image_id=image_id)
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def delete_all(self):
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Clears out all images
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"""Clears out all images."""
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def _translate_to_base(cls, image_meta):
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"""Overriding the base translation to handle conversion to datetime
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image_meta = service.BaseImageService._translate_to_base(image_meta)
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"""Override translation to handle conversion to datetime objects."""
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image_meta = service.BaseImageService._propertify_metadata(
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image_meta, cls.SERVICE_IMAGE_ATTRS)
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image_meta = _convert_timestamps_to_datetimes(image_meta)
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return image_meta
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# utility functions
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def _convert_timestamps_to_datetimes(image_meta):
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Returns image with known timestamp fields converted to datetime objects
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"""Returns image with timestamp fields converted to datetime objects."""
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for attr in ['created_at', 'updated_at', 'deleted_at']:
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if image_meta.get(attr):
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image_meta[attr] = _parse_glance_iso8601_timestamp(
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def _parse_glance_iso8601_timestamp(timestamp):
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Parse a subset of iso8601 timestamps into datetime objects
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iso_formats = ["%Y-%m-%dT%H:%M:%S.%f", "%Y-%m-%dT%H:%M:%S"]
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"""Parse a subset of iso8601 timestamps into datetime objects."""
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iso_formats = ['%Y-%m-%dT%H:%M:%S.%f', '%Y-%m-%dT%H:%M:%S']
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for iso_format in iso_formats:
added
removed
nova/image/glance.py
