def get_image_metadata(self, image_id, datastore):
metadata_path = os_metadata_path(datastore, image_id, IMAGE_FOLDER_NAME_PREFIX)
self._logger.info("Loading metadata %s" % metadata_path)
if os.path.exists(metadata_path):
with open(metadata_path) as fh:
try:
return json.load(fh)
except ValueError:
self._logger.error("Error loading metadata file %s" % metadata_path, exc_info=True)
return {}
def get_image_metadata(self, image_id, datastore):
metadata_path = os_metadata_path(datastore, image_id, IMAGE_FOLDER_NAME_PREFIX)
self._logger.info("Loading metadata %s" % metadata_path)
if os.path.exists(metadata_path):
with open(metadata_path) as fh:
try:
return json.load(fh)
except ValueError:
self._logger.error("Error loading metadata file %s" % metadata_path, exc_info=True)
return {}
def _copy_to_tmp_image(self, source_datastore, source_id, dest_datastore,
dest_id):
""" Copy an image into a temp location.
1. Lock a tmp image destination file with an exclusive lock. This
is to prevent the GC thread from garbage collecting directories
that are actively being used.
The temp directory name contains a random UUID to prevent
collisions with concurrent copies
2. Create the temp directory.
3. Copy the metadata file over.
4. Copy the vmdk over.
@return the tmp image directory on success.
"""
ds_type = self._get_datastore_type(dest_datastore)
if ds_type == DatastoreType.VSAN:
tmp_image_dir = os_datastore_path(
dest_datastore,
compond_path_join(IMAGE_FOLDER_NAME_PREFIX, dest_id),
compond_path_join(TMP_IMAGE_FOLDER_NAME_PREFIX,
str(uuid.uuid4())))
else:
tmp_image_dir = os_datastore_path(
dest_datastore,
compond_path_join(TMP_IMAGE_FOLDER_NAME_PREFIX,
str(uuid.uuid4())))
# Create the temp directory
self._host_client.make_directory(tmp_image_dir)
# Copy the metadata file if it exists.
source_meta = os_metadata_path(source_datastore, source_id,
IMAGE_FOLDER_NAME_PREFIX)
if os.path.exists(source_meta):
try:
dest_meta = os.path.join(tmp_image_dir,
metadata_filename(dest_id))
shutil.copy(source_meta, dest_meta)
except:
self._logger.exception("Failed to copy metadata file %s",
source_meta)
raise
# Create the timestamp file
self._create_image_timestamp_file(tmp_image_dir)
self._host_client.copy_disk(
vmdk_path(source_datastore, source_id, IMAGE_FOLDER_NAME_PREFIX),
os.path.join(tmp_image_dir, "%s.vmdk" % dest_id))
return tmp_image_dir
def _copy_to_tmp_image(self, source_datastore, source_id, dest_datastore, dest_id):
""" Copy an image into a temp location.
1. Lock a tmp image destination file with an exclusive lock. This
is to prevent the GC thread from garbage collecting directories
that are actively being used.
The temp directory name contains a random UUID to prevent
collisions with concurrent copies
2. Create the temp directory.
3. Copy the metadata file over.
4. Copy the vmdk over.
@return the tmp image directory on success.
"""
ds_type = self._get_datastore_type(dest_datastore)
if ds_type == DatastoreType.VSAN:
tmp_image_dir = os_datastore_path(dest_datastore,
compond_path_join(IMAGE_FOLDER_NAME_PREFIX, dest_id),
compond_path_join(TMP_IMAGE_FOLDER_NAME_PREFIX, str(uuid.uuid4())))
else:
tmp_image_dir = os_datastore_path(dest_datastore,
compond_path_join(TMP_IMAGE_FOLDER_NAME_PREFIX, str(uuid.uuid4())))
# Create the temp directory
self._host_client.make_directory(tmp_image_dir)
# Copy the metadata file if it exists.
source_meta = os_metadata_path(source_datastore, source_id, IMAGE_FOLDER_NAME_PREFIX)
if os.path.exists(source_meta):
try:
dest_meta = os.path.join(tmp_image_dir, metadata_filename(dest_id))
shutil.copy(source_meta, dest_meta)
except:
self._logger.exception("Failed to copy metadata file %s", source_meta)
raise
# Create the timestamp file
self._create_image_timestamp_file(tmp_image_dir)
self._host_client.copy_disk(vmdk_path(source_datastore, source_id, IMAGE_FOLDER_NAME_PREFIX),
os.path.join(tmp_image_dir, "%s.vmdk" % dest_id))
return tmp_image_dir
