def remove_if_exists(self):
meta_obj = rados.Object(self._client.ioctx, self.name)
try:
meta_obj.remove()
except rados.ObjectNotFound:
LOG.debug("Metadata backup object '%s' not found - ignoring",
self.name)
def get(self):
"""Get metadata backup object.
Returns None if the object does not exist.
"""
meta_obj = rados.Object(self._client.ioctx, self.name)
if not self._exists(meta_obj):
LOG.debug("Metadata backup object %s does not exist", self.name)
return None
return meta_obj.read()
def set(self, json_meta):
"""Write JSON metadata to a new object.
This should only be called once per backup. Raises
VolumeMetadataBackupExists if the object already exists.
"""
meta_obj = rados.Object(self._client.ioctx, self.name)
if self._exists(meta_obj):
msg = _("Metadata backup object '%s' already exists") % (self.name)
raise exception.VolumeMetadataBackupExists(msg)
meta_obj.write(json_meta)
def exists(self):
meta_obj = rados.Object(self._client.ioctx, self.name)
return self._exists(meta_obj)
