237 lines
8.6 KiB
Python
237 lines
8.6 KiB
Python
import logging
|
|
|
|
from datetime import datetime
|
|
from uuid import uuid4
|
|
|
|
from data.model import (tag, _basequery, BlobDoesNotExist, InvalidBlobUpload, db_transaction,
|
|
storage as storage_model, InvalidImageException)
|
|
from data.database import (Repository, Namespace, ImageStorage, Image, ImageStoragePlacement,
|
|
BlobUpload, ImageStorageLocation, db_random_func)
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def get_repository_blob_by_digest(repository, blob_digest):
|
|
""" Find the content-addressable blob linked to the specified repository.
|
|
"""
|
|
assert blob_digest
|
|
try:
|
|
storage = (ImageStorage
|
|
.select(ImageStorage.uuid)
|
|
.join(Image)
|
|
.where(Image.repository == repository,
|
|
ImageStorage.content_checksum == blob_digest,
|
|
ImageStorage.uploading == False)
|
|
.get())
|
|
|
|
return storage_model.get_storage_by_uuid(storage.uuid)
|
|
except (ImageStorage.DoesNotExist, InvalidImageException):
|
|
raise BlobDoesNotExist('Blob does not exist with digest: {0}'.format(blob_digest))
|
|
|
|
|
|
def get_repo_blob_by_digest(namespace, repo_name, blob_digest):
|
|
""" Find the content-addressable blob linked to the specified repository.
|
|
"""
|
|
assert blob_digest
|
|
try:
|
|
storage = (ImageStorage
|
|
.select(ImageStorage.uuid)
|
|
.join(Image)
|
|
.join(Repository)
|
|
.join(Namespace, on=(Namespace.id == Repository.namespace_user))
|
|
.where(Repository.name == repo_name, Namespace.username == namespace,
|
|
ImageStorage.content_checksum == blob_digest,
|
|
ImageStorage.uploading == False)
|
|
.get())
|
|
|
|
return storage_model.get_storage_by_uuid(storage.uuid)
|
|
except (ImageStorage.DoesNotExist, InvalidImageException):
|
|
raise BlobDoesNotExist('Blob does not exist with digest: {0}'.format(blob_digest))
|
|
|
|
|
|
def store_blob_record_and_temp_link(namespace, repo_name, blob_digest, location_obj, byte_count,
|
|
link_expiration_s, uncompressed_byte_count=None):
|
|
repo = _basequery.get_existing_repository(namespace, repo_name)
|
|
assert repo
|
|
|
|
return store_blob_record_and_temp_link_in_repo(repo.id, blob_digest, location_obj, byte_count,
|
|
link_expiration_s, uncompressed_byte_count)
|
|
|
|
|
|
def store_blob_record_and_temp_link_in_repo(repository_id, blob_digest, location_obj, byte_count,
|
|
link_expiration_s, uncompressed_byte_count=None):
|
|
""" Store a record of the blob and temporarily link it to the specified repository.
|
|
"""
|
|
assert blob_digest
|
|
assert byte_count is not None
|
|
|
|
with db_transaction():
|
|
try:
|
|
storage = ImageStorage.get(content_checksum=blob_digest)
|
|
save_changes = False
|
|
|
|
if storage.image_size is None:
|
|
storage.image_size = byte_count
|
|
save_changes = True
|
|
|
|
if storage.uncompressed_size is None and uncompressed_byte_count is not None:
|
|
storage.uncompressed_size = uncompressed_byte_count
|
|
save_changes = True
|
|
|
|
if save_changes:
|
|
storage.save()
|
|
|
|
ImageStoragePlacement.get(storage=storage, location=location_obj)
|
|
except ImageStorage.DoesNotExist:
|
|
storage = ImageStorage.create(content_checksum=blob_digest, uploading=False,
|
|
image_size=byte_count,
|
|
uncompressed_size=uncompressed_byte_count)
|
|
ImageStoragePlacement.create(storage=storage, location=location_obj)
|
|
except ImageStoragePlacement.DoesNotExist:
|
|
ImageStoragePlacement.create(storage=storage, location=location_obj)
|
|
|
|
_temp_link_blob(repository_id, storage, link_expiration_s)
|
|
return storage
|
|
|
|
|
|
def temp_link_blob(repository_id, blob_digest, link_expiration_s):
|
|
""" Temporarily links to the blob record from the given repository. If the blob record is not
|
|
found, return None.
|
|
"""
|
|
assert blob_digest
|
|
|
|
with db_transaction():
|
|
try:
|
|
storage = ImageStorage.get(content_checksum=blob_digest)
|
|
except ImageStorage.DoesNotExist:
|
|
return None
|
|
|
|
_temp_link_blob(repository_id, storage, link_expiration_s)
|
|
return storage
|
|
|
|
|
|
def _temp_link_blob(repository_id, storage, link_expiration_s):
|
|
""" Note: Should *always* be called by a parent under a transaction. """
|
|
random_image_name = str(uuid4())
|
|
|
|
# Create a temporary link into the repository, to be replaced by the v1 metadata later
|
|
# and create a temporary tag to reference it
|
|
image = Image.create(storage=storage, docker_image_id=random_image_name, repository=repository_id)
|
|
tag.create_temporary_hidden_tag(repository_id, image, link_expiration_s)
|
|
|
|
|
|
def get_stale_blob_upload(stale_timespan):
|
|
""" Returns a random blob upload which was created before the stale timespan. """
|
|
stale_threshold = datetime.now() - stale_timespan
|
|
|
|
try:
|
|
candidates = (BlobUpload
|
|
.select()
|
|
.where(BlobUpload.created <= stale_threshold)
|
|
.limit(500)
|
|
.distinct()
|
|
.alias('candidates'))
|
|
|
|
found = (BlobUpload
|
|
.select(candidates.c.id)
|
|
.from_(candidates)
|
|
.order_by(db_random_func())
|
|
.get())
|
|
if not found:
|
|
return None
|
|
|
|
return (BlobUpload
|
|
.select(BlobUpload, ImageStorageLocation)
|
|
.join(ImageStorageLocation)
|
|
.where(BlobUpload.id == found.id)
|
|
.get())
|
|
except BlobUpload.DoesNotExist:
|
|
return None
|
|
|
|
|
|
def get_blob_upload_by_uuid(upload_uuid):
|
|
""" Loads the upload with the given UUID, if any. """
|
|
try:
|
|
return (BlobUpload
|
|
.select()
|
|
.where(BlobUpload.uuid == upload_uuid)
|
|
.get())
|
|
except BlobUpload.DoesNotExist:
|
|
return None
|
|
|
|
|
|
def get_blob_upload(namespace, repo_name, upload_uuid):
|
|
""" Load the upload which is already in progress.
|
|
"""
|
|
try:
|
|
return (BlobUpload
|
|
.select(BlobUpload, ImageStorageLocation)
|
|
.join(ImageStorageLocation)
|
|
.switch(BlobUpload)
|
|
.join(Repository)
|
|
.join(Namespace, on=(Namespace.id == Repository.namespace_user))
|
|
.where(Repository.name == repo_name, Namespace.username == namespace,
|
|
BlobUpload.uuid == upload_uuid)
|
|
.get())
|
|
except BlobUpload.DoesNotExist:
|
|
raise InvalidBlobUpload()
|
|
|
|
|
|
def initiate_upload(namespace, repo_name, uuid, location_name, storage_metadata):
|
|
""" Initiates a blob upload for the repository with the given namespace and name,
|
|
in a specific location. """
|
|
repo = _basequery.get_existing_repository(namespace, repo_name)
|
|
return initiate_upload_for_repo(repo, uuid, location_name, storage_metadata)
|
|
|
|
|
|
def initiate_upload_for_repo(repo, uuid, location_name, storage_metadata):
|
|
""" Initiates a blob upload for a specific repository object, in a specific location. """
|
|
location = storage_model.get_image_location_for_name(location_name)
|
|
return BlobUpload.create(repository=repo, location=location.id, uuid=uuid,
|
|
storage_metadata=storage_metadata)
|
|
|
|
|
|
def get_shared_blob(digest):
|
|
""" Returns the ImageStorage blob with the given digest or, if not present,
|
|
returns None. This method is *only* to be used for shared blobs that are
|
|
globally accessible, such as the special empty gzipped tar layer that Docker
|
|
no longer pushes to us.
|
|
"""
|
|
assert digest
|
|
try:
|
|
return ImageStorage.get(content_checksum=digest, uploading=False)
|
|
except ImageStorage.DoesNotExist:
|
|
return None
|
|
|
|
|
|
def get_or_create_shared_blob(digest, byte_data, storage):
|
|
""" Returns the ImageStorage blob with the given digest or, if not present,
|
|
adds a row and writes the given byte data to the storage engine.
|
|
This method is *only* to be used for shared blobs that are globally
|
|
accessible, such as the special empty gzipped tar layer that Docker
|
|
no longer pushes to us.
|
|
"""
|
|
assert digest
|
|
assert byte_data is not None
|
|
assert storage
|
|
|
|
try:
|
|
return ImageStorage.get(content_checksum=digest, uploading=False)
|
|
except ImageStorage.DoesNotExist:
|
|
record = ImageStorage.create(image_size=len(byte_data), content_checksum=digest,
|
|
cas_path=True, uploading=True)
|
|
preferred = storage.preferred_locations[0]
|
|
location_obj = ImageStorageLocation.get(name=preferred)
|
|
try:
|
|
storage.put_content([preferred], storage_model.get_layer_path(record), byte_data)
|
|
ImageStoragePlacement.create(storage=record, location=location_obj)
|
|
|
|
record.uploading = False
|
|
record.save()
|
|
except:
|
|
logger.exception('Exception when trying to write special layer %s', digest)
|
|
record.delete_instance()
|
|
raise
|
|
|
|
return record
|