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# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
#
# 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.
import collections
import logging
from glanceclient.openstack.common.apiclient import exceptions
LOG = logging.getLogger(__name__)
def create_or_find_kernel_and_ramdisk(glanceclient, kernel_name, ramdisk_name,
kernel_path=None, ramdisk_path=None,
skip_missing=False):
"""Find or create a given kernel and ramdisk in Glance.
If either kernel_path or ramdisk_path is None, they will not be created,
and an exception will be raised if it does not exist in Glance.
:param glanceclient: A client for Glance.
:param kernel_name: Name to search for or create for the kernel.
:param ramdisk_name: Name to search for or create for the ramdisk.
:param kernel_path: Path to the kernel on disk.
:param ramdisk_path: Path to the ramdisk on disk.
:param skip_missing: If `True', do not raise an exception if either the
kernel or ramdisk image is not found.
:returns: A dictionary mapping kernel or ramdisk to the ID in Glance.
"""
kernel_image = _upload_file(glanceclient, kernel_name, kernel_path,
'aki', 'Kernel', skip_missing=skip_missing)
ramdisk_image = _upload_file(glanceclient, ramdisk_name, ramdisk_path,
'ari', 'Ramdisk', skip_missing=skip_missing)
return {'kernel': kernel_image.id, 'ramdisk': ramdisk_image.id}
def _upload_file(glanceclient, name, path, disk_format, type_name,
skip_missing=False):
image_tuple = collections.namedtuple('image', ['id'])
try:
image = glanceclient.images.find(name=name, disk_format=disk_format)
except exceptions.NotFound:
if path:
image = glanceclient.images.create(
name=name, disk_format=disk_format, is_public=True,
data=open(path, 'rb'))
else:
if skip_missing:
image = image_tuple(None)
else:
raise ValueError("%s image not found in Glance, and no path "
"specified." % type_name)
return image
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