# pylint: disable=protected-access import logging from collections import defaultdict from contextlib import contextmanager from peewee import IntegrityError from data import database from data import model from data.database import db_transaction from data.registry_model.interface import RegistryDataInterface from data.registry_model.datatypes import (Tag, Manifest, LegacyImage, Label, SecurityScanStatus, ManifestLayer, Blob, DerivedImage, RepositoryReference) from data.registry_model.shared import SharedModel from data.registry_model.label_handlers import apply_label_to_manifest from image.docker.schema1 import (DockerSchema1ManifestBuilder, ManifestException, DockerSchema1Manifest) from util.validation import is_json logger = logging.getLogger(__name__) class PreOCIModel(SharedModel, RegistryDataInterface): """ PreOCIModel implements the data model for the registry API using a database schema before it was changed to support the OCI specification. """ def supports_schema2(self, namespace_name): """ Returns whether the implementation of the data interface supports schema 2 format manifests. """ return False def get_tag_legacy_image_id(self, repository_ref, tag_name, storage): """ Returns the legacy image ID for the tag with a legacy images in the repository. Returns None if None. """ tag = self.get_repo_tag(repository_ref, tag_name, include_legacy_image=True) if tag is None: return None return tag.legacy_image.docker_image_id def get_legacy_tags_map(self, repository_ref, storage): """ Returns a map from tag name to its legacy image, for all tags with legacy images in the repository. """ tags = self.list_repository_tags(repository_ref, include_legacy_images=True) return {tag.name: tag.legacy_image.docker_image_id for tag in tags} def find_matching_tag(self, repository_ref, tag_names): """ Finds an alive tag in the repository matching one of the given tag names and returns it or None if none. """ found_tag = model.tag.find_matching_tag(repository_ref._db_id, tag_names) assert found_tag is None or not found_tag.hidden return Tag.for_repository_tag(found_tag) def get_most_recent_tag(self, repository_ref): """ Returns the most recently pushed alive tag in the repository, if any. If none, returns None. """ found_tag = model.tag.get_most_recent_tag(repository_ref._db_id) assert found_tag is None or not found_tag.hidden return Tag.for_repository_tag(found_tag) def get_manifest_for_tag(self, tag, backfill_if_necessary=False): """ Returns the manifest associated with the given tag. """ try: tag_manifest = database.TagManifest.get(tag_id=tag._db_id) except database.TagManifest.DoesNotExist: if backfill_if_necessary: return self.backfill_manifest_for_tag(tag) return None return Manifest.for_tag_manifest(tag_manifest) def lookup_manifest_by_digest(self, repository_ref, manifest_digest, allow_dead=False, include_legacy_image=False): """ Looks up the manifest with the given digest under the given repository and returns it or None if none. """ repo = model.repository.lookup_repository(repository_ref._db_id) if repo is None: return None try: tag_manifest = model.tag.load_manifest_by_digest(repo.namespace_user.username, repo.name, manifest_digest, allow_dead=allow_dead) except model.tag.InvalidManifestException: return None legacy_image = None if include_legacy_image: legacy_image = self.get_legacy_image(repository_ref, tag_manifest.tag.image.docker_image_id, include_parents=True) return Manifest.for_tag_manifest(tag_manifest, legacy_image) def create_manifest_and_retarget_tag(self, repository_ref, manifest_interface_instance, tag_name, storage): """ Creates a manifest in a repository, adding all of the necessary data in the model. The `manifest_interface_instance` parameter must be an instance of the manifest interface as returned by the image/docker package. Note that all blobs referenced by the manifest must exist under the repository or this method will fail and return None. Returns a reference to the (created manifest, tag) or (None, None) on error. """ # NOTE: Only Schema1 is supported by the pre_oci_model. assert isinstance(manifest_interface_instance, DockerSchema1Manifest) if not manifest_interface_instance.layers: return None, None # Ensure all the blobs in the manifest exist. digests = manifest_interface_instance.checksums query = model.storage.lookup_repo_storages_by_content_checksum(repository_ref._db_id, digests) blob_map = {s.content_checksum: s for s in query} for layer in manifest_interface_instance.layers: digest_str = str(layer.digest) if digest_str not in blob_map: return None, None # Lookup all the images and their parent images (if any) inside the manifest. # This will let us know which v1 images we need to synthesize and which ones are invalid. docker_image_ids = list(manifest_interface_instance.legacy_image_ids) images_query = model.image.lookup_repository_images(repository_ref._db_id, docker_image_ids) image_storage_map = {i.docker_image_id: i.storage for i in images_query} # Rewrite any v1 image IDs that do not match the checksum in the database. try: rewritten_images = manifest_interface_instance.rewrite_invalid_image_ids(image_storage_map) rewritten_images = list(rewritten_images) parent_image_map = {} for rewritten_image in rewritten_images: if not rewritten_image.image_id in image_storage_map: parent_image = None if rewritten_image.parent_image_id: parent_image = parent_image_map.get(rewritten_image.parent_image_id) if parent_image is None: parent_image = model.image.get_image(repository_ref._db_id, rewritten_image.parent_image_id) if parent_image is None: return None, None synthesized = model.image.synthesize_v1_image( repository_ref._db_id, blob_map[rewritten_image.content_checksum].id, blob_map[rewritten_image.content_checksum].image_size, rewritten_image.image_id, rewritten_image.created, rewritten_image.comment, rewritten_image.command, rewritten_image.compat_json, parent_image, ) parent_image_map[rewritten_image.image_id] = synthesized except ManifestException: logger.exception("exception when rewriting v1 metadata") return None, None # Store the manifest pointing to the tag. leaf_layer_id = rewritten_images[-1].image_id tag_manifest, newly_created = model.tag.store_tag_manifest_for_repo(repository_ref._db_id, tag_name, manifest_interface_instance, leaf_layer_id, blob_map) manifest = Manifest.for_tag_manifest(tag_manifest) # Save the labels on the manifest. repo_tag = tag_manifest.tag if newly_created: has_labels = False with self.batch_create_manifest_labels(manifest) as add_label: if add_label is None: return None, None for key, value in manifest_interface_instance.layers[-1].v1_metadata.labels.iteritems(): media_type = 'application/json' if is_json(value) else 'text/plain' add_label(key, value, 'manifest', media_type) has_labels = True # Reload the tag in case any updates were applied. if has_labels: repo_tag = database.RepositoryTag.get(id=repo_tag.id) return manifest, Tag.for_repository_tag(repo_tag) def create_manifest_label(self, manifest, key, value, source_type_name, media_type_name=None): """ Creates a label on the manifest with the given key and value. """ try: tag_manifest = database.TagManifest.get(id=manifest._db_id) except database.TagManifest.DoesNotExist: return None label_data = dict(key=key, value=value, source_type_name=source_type_name, media_type_name=media_type_name) with db_transaction(): # Create the label itself. label = model.label.create_manifest_label(tag_manifest, key, value, source_type_name, media_type_name) # Apply any changes to the manifest that the label prescribes. apply_label_to_manifest(label_data, manifest, self) return Label.for_label(label) @contextmanager def batch_create_manifest_labels(self, manifest): """ Returns a context manager for batch creation of labels on a manifest. Can raise InvalidLabelKeyException or InvalidMediaTypeException depending on the validation errors. """ try: tag_manifest = database.TagManifest.get(id=manifest._db_id) except database.TagManifest.DoesNotExist: yield None return labels_to_add = [] def add_label(key, value, source_type_name, media_type_name=None): labels_to_add.append(dict(key=key, value=value, source_type_name=source_type_name, media_type_name=media_type_name)) yield add_label # TODO: make this truly batch once we've fully transitioned to V2_2 and no longer need # the mapping tables. for label in labels_to_add: with db_transaction(): # Create the label itself. model.label.create_manifest_label(tag_manifest, **label) # Apply any changes to the manifest that the label prescribes. apply_label_to_manifest(label, manifest, self) def list_manifest_labels(self, manifest, key_prefix=None): """ Returns all labels found on the manifest. If specified, the key_prefix will filter the labels returned to those keys that start with the given prefix. """ labels = model.label.list_manifest_labels(manifest._db_id, prefix_filter=key_prefix) return [Label.for_label(l) for l in labels] def get_manifest_label(self, manifest, label_uuid): """ Returns the label with the specified UUID on the manifest or None if none. """ return Label.for_label(model.label.get_manifest_label(label_uuid, manifest._db_id)) def delete_manifest_label(self, manifest, label_uuid): """ Delete the label with the specified UUID on the manifest. Returns the label deleted or None if none. """ return Label.for_label(model.label.delete_manifest_label(label_uuid, manifest._db_id)) def list_repository_tags(self, repository_ref, include_legacy_images=False, start_pagination_id=None, limit=None): """ Returns a list of all the active tags in the repository. Note that this can be a *heavy* operation on repositories with a lot of tags, and should be avoided for more targetted operations wherever possible. """ if not include_legacy_images: tags = model.tag.list_active_repo_tags(repository_ref._db_id, start_pagination_id, limit, include_images=False) return [Tag.for_repository_tag(tag) for tag in tags] tags = model.tag.list_active_repo_tags(repository_ref._db_id, start_pagination_id, limit) return [Tag.for_repository_tag(tag, legacy_image=LegacyImage.for_image(tag.image), manifest_digest=(tag.tagmanifest.digest if hasattr(tag, 'tagmanifest') else None)) for tag in tags] def list_repository_tag_history(self, repository_ref, page=1, size=100, specific_tag_name=None, active_tags_only=False): """ Returns the history of all tags in the repository (unless filtered). This includes tags that have been made in-active due to newer versions of those tags coming into service. """ tags, manifest_map, has_more = model.tag.list_repository_tag_history(repository_ref._db_id, page, size, specific_tag_name, active_tags_only) return [Tag.for_repository_tag(tag, manifest_map.get(tag.id), legacy_image=LegacyImage.for_image(tag.image)) for tag in tags], has_more def has_expired_tag(self, repository_ref, tag_name): """ Returns true if and only if the repository contains a tag with the given name that is expired. """ try: model.tag.get_expired_tag_in_repo(repository_ref._db_id, tag_name) return True except database.RepositoryTag.DoesNotExist: return False def get_repo_tag(self, repository_ref, tag_name, include_legacy_image=False): """ Returns the latest, *active* tag found in the repository, with the matching name or None if none. """ assert isinstance(tag_name, basestring) tag = model.tag.get_active_tag_for_repo(repository_ref._db_id, tag_name) if tag is None: return None legacy_image = LegacyImage.for_image(tag.image) if include_legacy_image else None tag_manifest = model.tag.get_tag_manifest(tag) manifest_digest = tag_manifest.digest if tag_manifest else None return Tag.for_repository_tag(tag, legacy_image=legacy_image, manifest_digest=manifest_digest) def retarget_tag(self, repository_ref, tag_name, manifest_or_legacy_image, storage, is_reversion=False): """ Creates, updates or moves a tag to a new entry in history, pointing to the manifest or legacy image specified. If is_reversion is set to True, this operation is considered a reversion over a previous tag move operation. Returns the updated Tag or None on error. """ # TODO: unify this. if not is_reversion: if isinstance(manifest_or_legacy_image, Manifest): raise NotImplementedError('Not yet implemented') else: model.tag.create_or_update_tag_for_repo(repository_ref._db_id, tag_name, manifest_or_legacy_image.docker_image_id) else: if isinstance(manifest_or_legacy_image, Manifest): model.tag.restore_tag_to_manifest(repository_ref._db_id, tag_name, manifest_or_legacy_image.digest) else: model.tag.restore_tag_to_image(repository_ref._db_id, tag_name, manifest_or_legacy_image.docker_image_id) # Generate a manifest for the tag, if necessary. tag = self.get_repo_tag(repository_ref, tag_name, include_legacy_image=True) if tag is None: return None self.backfill_manifest_for_tag(tag) return tag def delete_tag(self, repository_ref, tag_name): """ Deletes the latest, *active* tag with the given name in the repository. """ repo = model.repository.lookup_repository(repository_ref._db_id) if repo is None: return None deleted_tag = model.tag.delete_tag(repo.namespace_user.username, repo.name, tag_name) return Tag.for_repository_tag(deleted_tag) def delete_tags_for_manifest(self, manifest): """ Deletes all tags pointing to the given manifest, making the manifest inaccessible for pulling. Returns the tags deleted, if any. Returns None on error. """ try: tagmanifest = database.TagManifest.get(id=manifest._db_id) except database.TagManifest.DoesNotExist: return None namespace_name = tagmanifest.tag.repository.namespace_user.username repo_name = tagmanifest.tag.repository.name tags = model.tag.delete_manifest_by_digest(namespace_name, repo_name, manifest.digest) return [Tag.for_repository_tag(tag) for tag in tags] def change_repository_tag_expiration(self, tag, expiration_date): """ Sets the expiration date of the tag under the matching repository to that given. If the expiration date is None, then the tag will not expire. Returns a tuple of the previous expiration timestamp in seconds (if any), and whether the operation succeeded. """ try: tag_obj = database.RepositoryTag.get(id=tag._db_id) except database.RepositoryTag.DoesNotExist: return (None, False) return model.tag.change_tag_expiration(tag_obj, expiration_date) def get_legacy_images_owned_by_tag(self, tag): """ Returns all legacy images *solely owned and used* by the given tag. """ try: tag_obj = database.RepositoryTag.get(id=tag._db_id) except database.RepositoryTag.DoesNotExist: return None # Collect the IDs of all images that the tag uses. tag_image_ids = set() tag_image_ids.add(tag_obj.image.id) tag_image_ids.update(tag_obj.image.ancestor_id_list()) # Remove any images shared by other tags. for current_tag in model.tag.list_active_repo_tags(tag_obj.repository_id): if current_tag == tag_obj: continue tag_image_ids.discard(current_tag.image.id) tag_image_ids = tag_image_ids.difference(current_tag.image.ancestor_id_list()) if not tag_image_ids: return [] if not tag_image_ids: return [] # Load the images we need to return. images = database.Image.select().where(database.Image.id << list(tag_image_ids)) all_image_ids = set() for image in images: all_image_ids.add(image.id) all_image_ids.update(image.ancestor_id_list()) # Build a map of all the images and their parents. images_map = {} all_images = database.Image.select().where(database.Image.id << list(all_image_ids)) for image in all_images: images_map[image.id] = image return [LegacyImage.for_image(image, images_map=images_map) for image in images] def get_security_status(self, manifest_or_legacy_image): """ Returns the security status for the given manifest or legacy image or None if none. """ image = None if isinstance(manifest_or_legacy_image, Manifest): try: tag_manifest = database.TagManifest.get(id=manifest_or_legacy_image._db_id) image = tag_manifest.tag.image except database.TagManifest.DoesNotExist: return None else: try: image = database.Image.get(id=manifest_or_legacy_image._db_id) except database.Image.DoesNotExist: return None if image.security_indexed_engine is not None and image.security_indexed_engine >= 0: return SecurityScanStatus.SCANNED if image.security_indexed else SecurityScanStatus.FAILED return SecurityScanStatus.QUEUED def backfill_manifest_for_tag(self, tag): """ Backfills a manifest for the V1 tag specified. If a manifest already exists for the tag, returns that manifest. NOTE: This method will only be necessary until we've completed the backfill, at which point it should be removed. """ # Ensure that there isn't already a manifest for the tag. tag_manifest = model.tag.get_tag_manifest(tag._db_id) if tag_manifest is not None: return Manifest.for_tag_manifest(tag_manifest) # Create the manifest. try: tag_obj = database.RepositoryTag.get(id=tag._db_id) except database.RepositoryTag.DoesNotExist: return None assert not tag_obj.hidden repo = tag_obj.repository namespace_name = repo.namespace_user.username repo_name = repo.name # Write the manifest to the DB. manifest = self._build_manifest_for_legacy_image(tag_obj.name, tag_obj.image) blob_query = model.storage.lookup_repo_storages_by_content_checksum(repo, manifest.checksums) storage_map = {blob.content_checksum: blob.id for blob in blob_query} try: tag_manifest, _ = model.tag.associate_generated_tag_manifest(namespace_name, repo_name, tag.name, manifest, storage_map) assert tag_manifest except IntegrityError: tag_manifest = model.tag.get_tag_manifest(tag_obj) return Manifest.for_tag_manifest(tag_manifest) def list_manifest_layers(self, manifest, storage, include_placements=False): try: tag_manifest = database.TagManifest.get(id=manifest._db_id) except database.TagManifest.DoesNotExist: logger.exception('Could not find tag manifest for manifest `%s`', manifest._db_id) return None try: parsed = manifest.get_parsed_manifest() except ManifestException: logger.exception('Could not parse and validate manifest `%s`', manifest._db_id) return None repo_ref = RepositoryReference.for_id(tag_manifest.tag.repository_id) return self.list_parsed_manifest_layers(repo_ref, parsed, storage, include_placements) def lookup_derived_image(self, manifest, verb, varying_metadata=None, include_placements=False): """ Looks up the derived image for the given manifest, verb and optional varying metadata and returns it or None if none. """ try: tag_manifest = database.TagManifest.get(id=manifest._db_id) except database.TagManifest.DoesNotExist: logger.exception('Could not find tag manifest for manifest `%s`', manifest._db_id) return None repo_image = tag_manifest.tag.image derived = model.image.find_derived_storage_for_image(repo_image, verb, varying_metadata) return self._build_derived(derived, verb, varying_metadata, include_placements) def lookup_or_create_derived_image(self, manifest, verb, storage_location, storage, varying_metadata=None, include_placements=False): """ Looks up the derived image for the given maniest, verb and optional varying metadata and returns it. If none exists, a new derived image is created. """ try: tag_manifest = database.TagManifest.get(id=manifest._db_id) except database.TagManifest.DoesNotExist: logger.exception('Could not find tag manifest for manifest `%s`', manifest._db_id) return None repo_image = tag_manifest.tag.image derived = model.image.find_or_create_derived_storage(repo_image, verb, storage_location, varying_metadata) return self._build_derived(derived, verb, varying_metadata, include_placements) def set_tags_expiration_for_manifest(self, manifest, expiration_sec): """ Sets the expiration on all tags that point to the given manifest to that specified. """ try: tag_manifest = database.TagManifest.get(id=manifest._db_id) except database.TagManifest.DoesNotExist: return model.tag.set_tag_expiration_for_manifest(tag_manifest, expiration_sec) def get_schema1_parsed_manifest(self, manifest, namespace_name, repo_name, tag_name, storage): """ Returns the schema 1 version of this manifest, or None if none. """ try: return manifest.get_parsed_manifest() except ManifestException: return None def convert_manifest(self, manifest, namespace_name, repo_name, tag_name, allowed_mediatypes, storage): try: parsed = manifest.get_parsed_manifest() except ManifestException: return None try: return parsed.convert_manifest(allowed_mediatypes, namespace_name, repo_name, tag_name, None) except ManifestException: return None def create_manifest_with_temp_tag(self, repository_ref, manifest_interface_instance, expiration_sec, storage): """ Creates a manifest under the repository and sets a temporary tag to point to it. Returns the manifest object created or None on error. """ raise NotImplementedError('Unsupported in pre OCI model') def get_repo_blob_by_digest(self, repository_ref, blob_digest, include_placements=False): """ Returns the blob in the repository with the given digest, if any or None if none. Note that there may be multiple records in the same repository for the same blob digest, so the return value of this function may change. """ try: image_storage = model.blob.get_repository_blob_by_digest(repository_ref._db_id, blob_digest) except model.BlobDoesNotExist: return None assert image_storage.cas_path is not None placements = None if include_placements: placements = list(model.storage.get_storage_locations(image_storage.uuid)) return Blob.for_image_storage(image_storage, storage_path=model.storage.get_layer_path(image_storage), placements=placements) def list_parsed_manifest_layers(self, repository_ref, parsed_manifest, storage, include_placements=False): """ Returns an *ordered list* of the layers found in the parsed manifest, starting at the base and working towards the leaf, including the associated Blob and its placements (if specified). """ return self._list_manifest_layers(repository_ref._db_id, parsed_manifest, storage, include_placements=include_placements) def get_manifest_local_blobs(self, manifest, include_placements=False): """ Returns the set of local blobs for the given manifest or None if none. """ try: tag_manifest = database.TagManifest.get(id=manifest._db_id) except database.TagManifest.DoesNotExist: return None return self._get_manifest_local_blobs(manifest, tag_manifest.tag.repository_id, include_placements) pre_oci_model = PreOCIModel()