def __convertDomainMetadataToTags(domain, targetVersion):
log = logging.getLogger('Storage.DomainMetadataToTags')
newMetadata = blockSD.TagBasedSDMetadata(domain.sdUUID)
oldMetadata = domain._metadata
# We use _dict to bypass the validators in order to copy all metadata
metadata = oldMetadata._dict.copy()
metadata[sd.DMDK_VERSION] = str(targetVersion) # Must be a string
log.debug("Converting domain %s to tag based metadata", domain.sdUUID)
newMetadata._dict.update(metadata)
try:
# If we can't clear the old metadata we don't have any clue on what
# actually happened. We prepare the convertError exception to raise
# later on if we discover that the upgrade didn't take place.
oldMetadata._dict.clear()
except Exception as convertError:
log.error("Could not clear the old metadata", exc_info=True)
else:
# We don't have any valuable information to add here
convertError = RuntimeError("Unknown metadata conversion error")
# If this fails, there's nothing we can do, let's bubble the exception
chkMetadata = blockSD.selectMetadata(domain.sdUUID)
if chkMetadata[sd.DMDK_VERSION] == int(targetVersion):
# Switching to the newMetadata (successful upgrade), the oldMetadata
# was cleared after all.
domain._metadata = chkMetadata
log.debug(
"Conversion of domain %s to tag based metadata completed, "
"target version = %s", domain.sdUUID, targetVersion)
else:
# The upgrade failed, cleaning up the new metadata
log.error(
"Could not convert domain %s to tag based metadata, "
"target version = %s", domain.sdUUID, targetVersion)
newMetadata._dict.clear()
# Raising the oldMetadata_dict.clear() exception or the default one
raise convertError
def __convertDomainMetadataToTags(domain, targetVersion):
log = logging.getLogger('Storage.DomainMetadataToTags')
newMetadata = blockSD.TagBasedSDMetadata(domain.sdUUID)
oldMetadata = domain._metadata
# We use _dict to bypass the validators in order to copy all metadata
metadata = oldMetadata._dict.copy()
metadata[sd.DMDK_VERSION] = str(targetVersion) # Must be a string
log.debug("Converting domain %s to tag based metadata", domain.sdUUID)
newMetadata._dict.update(metadata)
try:
# If we can't clear the old metadata we don't have any clue on what
# actually happened. We prepare the convertError exception to raise
# later on if we discover that the upgrade didn't take place.
oldMetadata._dict.clear()
except Exception as convertError:
log.error("Could not clear the old metadata", exc_info=True)
else:
# We don't have any valuable information to add here
convertError = RuntimeError("Unknown metadata conversion error")
# If this fails, there's nothing we can do, let's bubble the exception
chkMetadata = blockSD.selectMetadata(domain.sdUUID)
if chkMetadata[sd.DMDK_VERSION] == int(targetVersion):
# Switching to the newMetadata (successful upgrade), the oldMetadata
# was cleared after all.
domain._metadata = chkMetadata
log.debug("Conversion of domain %s to tag based metadata completed, "
"target version = %s", domain.sdUUID, targetVersion)
else:
# The upgrade failed, cleaning up the new metadata
log.error("Could not convert domain %s to tag based metadata, "
"target version = %s", domain.sdUUID, targetVersion)
newMetadata._dict.clear()
# Raising the oldMetadata_dict.clear() exception or the default one
raise convertError