def _get_or_upload_image(self, context, image_meta):
"""Return a cached image name
Attempt to find a cached copy of the image. If there is no cached copy
of the image, create one.
:param context: nova context used to retrieve image from glance
:param nova.objects.ImageMeta image_meta:
The metadata of the image of the instance.
:return: The name of the virtual disk containing the image
"""
# Check for cached image
with lockutils.lock(image_meta.id):
vg_wrap = self._get_vg_wrap()
cache_name = self.get_name_by_uuid(disk_dvr.DiskType.IMAGE,
image_meta.id, short=True)
image = [disk for disk in vg_wrap.virtual_disks
if disk.name == cache_name]
if len(image) == 1:
return image[0].udid
image = tsk_stg.upload_new_vdisk(
self.adapter, self._vios_uuid, self.vg_uuid,
disk_dvr.IterableToFileAdapter(
IMAGE_API.download(context, image_meta.id)), cache_name,
image_meta.size, d_size=image_meta.size,
upload_type=tsk_stg.UploadType.IO_STREAM,
file_format=image_meta.disk_format)[0]
return image.udid
def _create_disk_from_image(self, context, instance, image_meta,
image_type=disk_drv.DiskType.BOOT):
"""Creates a disk and copies the specified image to it.
If the specified image has not already been uploaded, an Image LU is
created for it. A Disk LU is then created for the instance and linked
to the Image LU.
:param context: nova context used to retrieve image from glance
:param instance: instance to create the disk for.
:param nova.objects.ImageMeta image_meta:
The metadata of the image of the instance.
:param image_type: The image type. See disk_drv.DiskType.
:return: The backing pypowervm LU storage object that was created.
"""
LOG.info('SSP: Create %(image_type)s disk from image %(image_id)s.',
dict(image_type=image_type, image_id=image_meta.id),
instance=instance)
image_lu = tsk_cs.get_or_upload_image_lu(
self._tier, self._get_image_name(image_meta),
self._any_vios_uuid(), disk_drv.IterableToFileAdapter(
IMAGE_API.download(context, image_meta.id)),
image_meta.size, upload_type=tsk_stg.UploadType.IO_STREAM)
boot_lu_name = self._get_disk_name(image_type, instance)
LOG.info('SSP: Disk name is %s', boot_lu_name, instance=instance)
return tsk_stg.crt_lu(
self._tier, boot_lu_name, instance.flavor.root_gb,
typ=pvm_stg.LUType.DISK, clone=image_lu)[1]