251 lines
8.5 KiB
Diff
251 lines
8.5 KiB
Diff
From 6da11c584cab0e2ff396cc0208453a3e19b4dc2d Mon Sep 17 00:00:00 2001
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From: Stefan Dinescu <stefan.dinescu@windriver.com>
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Date: Fri, 17 Nov 2017 15:50:23 +0000
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Subject: [PATCH 1/1] Add glance driver
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---
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glance_store/_drivers/glance.py | 210 ++++++++++++++++++++++++++++++++++++++++
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setup.cfg | 2 +
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2 files changed, 212 insertions(+)
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create mode 100644 glance_store/_drivers/glance.py
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diff --git a/glance_store/_drivers/glance.py b/glance_store/_drivers/glance.py
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new file mode 100644
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index 0000000..554a5a1
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--- /dev/null
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+++ b/glance_store/_drivers/glance.py
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@@ -0,0 +1,210 @@
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+# Copyright (c) 2013-2017 Wind River Systems, Inc.
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+# SPDX-License-Identifier: Apache-2.0
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+#
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+#
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+#
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+#
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+
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+# vim: tabstop=4 shiftwidth=4 softtabstop=4
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+
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+# All Rights Reserved.
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+#
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+
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+"""Storage backend for glance"""
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+
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+import contextlib
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+import errno
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+import hashlib
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+import logging
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+import math
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+import os
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+import socket
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+import time
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+
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+from oslo_concurrency import processutils
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+from oslo_config import cfg
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+from oslo_utils import units
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+
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+from glance_store import capabilities
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+from glance_store.common import utils
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+import glance_store.driver
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+from glance_store import exceptions
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+from glance_store.i18n import _, _LE, _LW, _LI
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+import glance_store.location
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+from keystoneclient import exceptions as keystone_exc
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+from keystoneclient import service_catalog as keystone_sc
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+
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+import keystoneauth1.loading
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+import keystoneauth1.session
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+
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+from glanceclient import client as glance_client
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+from cinderclient import exceptions as glance_exception
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+
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+CONF = cfg.CONF
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+LOG = logging.getLogger(__name__)
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+
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+_GLANCE_OPTS = [
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+ cfg.StrOpt('glance_endpoint_template',
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+ default=None,
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+ help=_("Glance Endpoint template")),
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+ cfg.StrOpt('glance_catalog_info',
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+ default='image:glance:internalURL',
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+ help=_("Glance catalog info")),]
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+
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+def get_glanceclient(conf, remote_region, context=None):
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+
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+ glance_store = conf.glance_store
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+
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+ if glance_store.cinder_endpoint_template:
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+ url = glance_store.glance_endpoint_template % context.to_dict()
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+ else:
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+ info = glance_store.glance_catalog_info
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+ service_type, service_name, endpoint_type = info.split(':')
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+ sc = {'serviceCatalog': context.service_catalog}
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+ try:
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+ url = keystone_sc.ServiceCatalogV2(sc).url_for(
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+ region_name=remote_region,
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+ service_type=service_type,
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+ service_name=service_name,
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+ endpoint_type=endpoint_type)
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+ except keystone_exc.EndpointNotFound:
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+ reason = _("Failed to find Glance from a service catalog.")
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+ raise exceptions.BadStoreConfiguration(store_name="glance",
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+ reason=reason)
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+
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+ c = glance_client.Client('2',
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+ endpoint=url,
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+ token=context.auth_token)
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+
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+ return c
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+
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+
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+class StoreLocation(glance_store.location.StoreLocation):
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+
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+ """Class describing a Glance URI."""
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+
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+ def process_specs(self):
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+ self.scheme = self.specs.get('scheme', 'glance')
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+ self.image_id = self.specs.get('image_id')
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+ self.remote_region = self.specs.get('remote_region')
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+
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+ def get_uri(self):
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+ return "glance://%s/%s" % (self.remote_region, self.image_id)
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+
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+ def parse_uri(self, uri):
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+
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+ if not uri.startswith('glance://'):
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+ reason = _("URI must start with 'glance://'")
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+ LOG.info(reason)
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+ raise exceptions.BadStoreUri(message=reason)
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+
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+ self.scheme = 'glance'
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+
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+ sp = uri.split('/')
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+
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+ self.image_id = sp[-1]
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+ self.remote_region=sp[-2]
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+
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+ if not utils.is_uuid_like(self.image_id):
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+ reason = _("URI contains invalid image ID")
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+ LOG.info(reason)
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+ raise exceptions.BadStoreUri(message=reason)
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+
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+
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+
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+class Store(glance_store.driver.Store):
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+
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+ """Cinder backend store adapter."""
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+
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+ _CAPABILITIES = (capabilities.BitMasks.READ_ACCESS |
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+ capabilities.BitMasks.DRIVER_REUSABLE)
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+ OPTIONS = _GLANCE_OPTS
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+ EXAMPLE_URL = "glance://<remote_region>/<image_id>"
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+
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+ def __init__(self, *args, **kargs):
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+ super(Store, self).__init__(*args, **kargs)
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+
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+ def get_schemes(self):
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+ return ('glance',)
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+
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+ def _check_context(self, context, require_tenant=False):
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+
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+ if context is None:
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+ reason = _("Glance storage requires a context.")
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+ raise exceptions.BadStoreConfiguration(store_name="glance",
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+ reason=reason)
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+ if context.service_catalog is None:
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+ reason = _("glance storage requires a service catalog.")
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+ raise exceptions.BadStoreConfiguration(store_name="glance",
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+ reason=reason)
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+
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+
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+ @capabilities.check
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+ def get(self, location, offset=0, chunk_size=None, context=None):
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+ """
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+ Takes a `glance_store.location.Location` object that indicates
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+ where to find the image file, and returns a tuple of generator
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+ (for reading the image file) and image_size
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+
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+ :param location `glance_store.location.Location` object, supplied
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+ from glance_store.location.get_location_from_uri()
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+ :param offset: offset to start reading
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+ :param chunk_size: size to read, or None to get all the image
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+ :param context: Request context
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+ :raises `glance_store.exceptions.NotFound` if image does not exist
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+ """
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+
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+ loc = location.store_location
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+ self._check_context(context)
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+
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+ try:
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+ gc = get_glanceclient(self.conf, loc.remote_region, context)
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+ img = gc.images.get(loc.image_id)
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+
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+ size = int(img.size/(1024*1024))
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+ iterator = gc.images.data(loc.image_id)
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+ return (iterator, chunk_size or size)
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+ except glance_exception.NotFound:
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+ reason = _("Failed to get image size due to "
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+ "volume can not be found: %s") % volume.id
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+ LOG.error(reason)
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+ raise exceptions.NotFound(reason)
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+ except glance_exception.ClientException as e:
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+ msg = (_('Failed to get image volume %(volume_id): %(error)s')
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+ % {'volume_id': loc.volume_id, 'error': e})
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+ LOG.error(msg)
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+ raise exceptions.BackendException(msg)
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+
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+ def get_size(self, location, context=None):
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+ """
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+ Takes a `glance_store.location.Location` object that indicates
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+ where to find the image file and returns the image size
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+
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+ :param location: `glance_store.location.Location` object, supplied
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+ from glance_store.location.get_location_from_uri()
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+ :raises: `glance_store.exceptions.NotFound` if image does not exist
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+ :rtype int
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+ """
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+
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+ loc = location.store_location
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+
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+ try:
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+ self._check_context(context)
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+ img = get_glanceclient(self.conf,
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+ context).images.get(loc.image_id)
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+ return int(img.size/1024 * 1024)
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+ except glance_exception.NotFound:
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+ raise exceptions.NotFound(image=loc.image_id)
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+ except Exception:
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+ LOG.exception(_LE("Failed to get image size due to "
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+ "internal error."))
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+ return 0
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+
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+ @capabilities.check
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+ def add(self, image_id, image_file, image_size, context=None,
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+ verifier=None):
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+ raise NotImplementedError
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+
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+ @capabilities.check
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+ def delete(self, location, context=None):
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+ raise NotImplementedError
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diff --git a/setup.cfg b/setup.cfg
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index b3054c4..8cc9fb7 100644
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--- a/setup.cfg
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+++ b/setup.cfg
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@@ -32,6 +32,7 @@ glance_store.drivers =
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sheepdog = glance_store._drivers.sheepdog:Store
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cinder = glance_store._drivers.cinder:Store
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vmware = glance_store._drivers.vmware_datastore:Store
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+ glance = glance_store._drivers.glance:Store
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# TESTS ONLY
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no_conf = glance_store.tests.fakes:UnconfigurableStore
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# Backwards compatibility
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@@ -42,6 +43,7 @@ glance_store.drivers =
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glance.store.sheepdog.Store = glance_store._drivers.sheepdog:Store
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glance.store.cinder.Store = glance_store._drivers.cinder:Store
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glance.store.vmware_datastore.Store = glance_store._drivers.vmware_datastore:Store
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+ glance.store.glance.Store = glance_store._drivers.glance:Store
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oslo.config.opts =
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glance.store = glance_store.backend:_list_opts
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console_scripts =
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--
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1.8.3.1
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