552 lines
23 KiB
Python
552 lines
23 KiB
Python
import unittest
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import time
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import hashlib
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from contextlib import contextmanager
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from playhouse.test_utils import assert_query_count
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from app import app, storage
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from initdb import setup_database_for_testing, finished_database_for_testing
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from data import model, database
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from data.database import Image, ImageStorage, DerivedStorageForImage, Label, TagManifestLabel, Blob
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ADMIN_ACCESS_USER = 'devtable'
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PUBLIC_USER = 'public'
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REPO = 'somerepo'
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class TestGarbageCollection(unittest.TestCase):
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@staticmethod
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def _set_tag_expiration_policy(namespace, expiration_s):
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namespace_user = model.user.get_user(namespace)
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model.user.change_user_tag_expiration(namespace_user, expiration_s)
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def setUp(self):
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setup_database_for_testing(self)
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self._set_tag_expiration_policy(ADMIN_ACCESS_USER, 0)
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self._set_tag_expiration_policy(PUBLIC_USER, 0)
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self.app = app.test_client()
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self.ctx = app.test_request_context()
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self.ctx.__enter__()
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def tearDown(self):
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finished_database_for_testing(self)
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self.ctx.__exit__(True, None, None)
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@staticmethod
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def createImage(docker_image_id, repository_obj, username):
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preferred = storage.preferred_locations[0]
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image = model.image.find_create_or_link_image(docker_image_id, repository_obj, username, {},
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preferred)
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image.storage.uploading = False
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image.storage.save()
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# Create derived images as well.
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model.image.find_or_create_derived_storage(image, 'squash', preferred)
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model.image.find_or_create_derived_storage(image, 'aci', preferred)
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# Add some torrent info.
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try:
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database.TorrentInfo.get(storage=image.storage)
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except database.TorrentInfo.DoesNotExist:
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model.storage.save_torrent_info(image.storage, 1, 'helloworld')
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# Add some additional placements to the image.
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for location_name in ['local_eu']:
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location = database.ImageStorageLocation.get(name=location_name)
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try:
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database.ImageStoragePlacement.get(location=location, storage=image.storage)
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except:
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continue
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database.ImageStoragePlacement.create(location=location, storage=image.storage)
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return image.storage
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def createRepository(self, namespace=ADMIN_ACCESS_USER, name=REPO, **kwargs):
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user = model.user.get_user(namespace)
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repo = model.repository.create_repository(namespace, name, user)
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# Populate the repository with the tags.
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image_map = {}
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for tag_name in kwargs:
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image_ids = kwargs[tag_name]
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parent = None
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for image_id in image_ids:
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if not image_id in image_map:
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image_map[image_id] = self.createImage(image_id, repo, namespace)
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v1_metadata = {
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'id': image_id,
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}
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if parent is not None:
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v1_metadata['parent'] = parent.docker_image_id
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# Set the ancestors for the image.
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parent = model.image.set_image_metadata(image_id, namespace, name, '', '', '', v1_metadata,
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parent=parent)
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# Set the tag for the image.
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tag_manifest, _ = model.tag.store_tag_manifest(namespace, name, tag_name, image_ids[-1],
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'sha:someshahere', '{}')
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# Add some labels to the tag.
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model.label.create_manifest_label(tag_manifest, 'foo', 'bar', 'manifest')
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model.label.create_manifest_label(tag_manifest, 'meh', 'grah', 'manifest')
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return repo
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def gcNow(self, repository):
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self.assertTrue(model.repository.garbage_collect_repo(repository))
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def deleteTag(self, repository, tag, perform_gc=True):
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model.tag.delete_tag(repository.namespace_user.username, repository.name, tag)
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if perform_gc:
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self.assertTrue(model.repository.garbage_collect_repo(repository))
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def moveTag(self, repository, tag, docker_image_id):
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model.tag.create_or_update_tag(repository.namespace_user.username, repository.name, tag,
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docker_image_id)
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self.assertTrue(model.repository.garbage_collect_repo(repository))
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def assertNotDeleted(self, repository, *args):
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for docker_image_id in args:
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self.assertTrue(bool(model.image.get_image_by_id(repository.namespace_user.username,
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repository.name, docker_image_id)))
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def assertDeleted(self, repository, *args):
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for docker_image_id in args:
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try:
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# Verify the image is missing when accessed by the repository.
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model.image.get_image_by_id(repository.namespace_user.username, repository.name,
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docker_image_id)
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except model.DataModelException:
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return
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self.fail('Expected image %s to be deleted' % docker_image_id)
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@staticmethod
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def _get_dangling_storage_count():
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storage_ids = set([current.id for current in ImageStorage.select()])
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referenced_by_image = set([image.storage_id for image in Image.select()])
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referenced_by_derived = set([derived.derivative_id
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for derived in DerivedStorageForImage.select()])
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return len(storage_ids - referenced_by_image - referenced_by_derived)
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@staticmethod
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def _get_dangling_label_count():
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label_ids = set([current.id for current in Label.select()])
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referenced_by_manifest = set([mlabel.label_id for mlabel in TagManifestLabel.select()])
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return len(label_ids - referenced_by_manifest)
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@contextmanager
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def assert_gc_integrity(self, expect_storage_removed=True):
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""" Specialized assertion for ensuring that GC cleans up all dangling storages
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and labels, invokes the callback for images removed and doesn't invoke the
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callback for images *not* removed.
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"""
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# TODO: Consider also asserting the number of DB queries being performed.
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# Add a callback for when images are removed.
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removed_image_storages = []
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model.config.register_image_cleanup_callback(removed_image_storages.extend)
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# Store the number of dangling storages and labels.
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existing_storage_count = self._get_dangling_storage_count()
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existing_label_count = self._get_dangling_label_count()
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yield
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# Ensure the number of dangling storages and labels has not changed.
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updated_storage_count = self._get_dangling_storage_count()
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self.assertEqual(updated_storage_count, existing_storage_count)
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updated_label_count = self._get_dangling_label_count()
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self.assertEqual(updated_label_count, existing_label_count)
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# Ensure that for each call to the image+storage cleanup callback, the image and its
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# storage is not found *anywhere* in the database.
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for removed_image_and_storage in removed_image_storages:
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with self.assertRaises(Image.DoesNotExist):
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Image.get(id=removed_image_and_storage.id)
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with self.assertRaises(ImageStorage.DoesNotExist):
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ImageStorage.get(id=removed_image_and_storage.storage_id)
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with self.assertRaises(ImageStorage.DoesNotExist):
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ImageStorage.get(uuid=removed_image_and_storage.storage.uuid)
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self.assertEquals(expect_storage_removed, bool(removed_image_storages))
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# Ensure all CAS storage is in the storage engine.
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preferred = storage.preferred_locations[0]
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for storage_row in ImageStorage.select():
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if storage_row.cas_path:
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storage.get_content({preferred}, storage.blob_path(storage_row.content_checksum))
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for blob_row in Blob.select():
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storage.get_content({preferred}, storage.blob_path(blob_row.digest))
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def test_has_garbage(self):
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""" Remove all existing repositories, then add one without garbage, check, then add one with
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garbage, and check again.
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"""
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# Delete all existing repos.
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for repo in database.Repository.select().order_by(database.Repository.id):
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self.assertTrue(model.repository.purge_repository(repo.namespace_user.username, repo.name))
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# Change the time machine expiration on the namespace.
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(database.User
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.update(removed_tag_expiration_s=1000000000)
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.where(database.User.username == ADMIN_ACCESS_USER)
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.execute())
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# Create a repository without any garbage.
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repository = self.createRepository(latest=['i1', 'i2', 'i3'])
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# Ensure that no repositories are returned by the has garbage check.
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self.assertIsNone(model.repository.find_repository_with_garbage(1000000000))
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# Delete a tag.
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self.deleteTag(repository, 'latest', perform_gc=False)
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# There should still not be any repositories with garbage, due to time machine.
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self.assertIsNone(model.repository.find_repository_with_garbage(1000000000))
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# Change the time machine expiration on the namespace.
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(database.User
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.update(removed_tag_expiration_s=0)
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.where(database.User.username == ADMIN_ACCESS_USER)
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.execute())
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# Now we should find the repository for GC.
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repository = model.repository.find_repository_with_garbage(0)
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self.assertIsNotNone(repository)
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self.assertEquals(REPO, repository.name)
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# GC the repository.
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self.assertTrue(model.repository.garbage_collect_repo(repository))
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# There should now be no repositories with garbage.
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self.assertIsNone(model.repository.find_repository_with_garbage(0))
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def test_find_garbage_policy_functions(self):
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with assert_query_count(1):
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one_policy = model.repository.get_random_gc_policy()
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all_policies = model.repository._get_gc_expiration_policies()
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self.assertIn(one_policy, all_policies)
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def test_one_tag(self):
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""" Create a repository with a single tag, then remove that tag and verify that the repository
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is now empty. """
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with self.assert_gc_integrity():
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repository = self.createRepository(latest=['i1', 'i2', 'i3'])
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self.deleteTag(repository, 'latest')
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self.assertDeleted(repository, 'i1', 'i2', 'i3')
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def test_two_tags_unshared_images(self):
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""" Repository has two tags with no shared images between them. """
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with self.assert_gc_integrity():
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repository = self.createRepository(latest=['i1', 'i2', 'i3'], other=['f1', 'f2'])
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self.deleteTag(repository, 'latest')
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self.assertDeleted(repository, 'i1', 'i2', 'i3')
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self.assertNotDeleted(repository, 'f1', 'f2')
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def test_two_tags_shared_images(self):
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""" Repository has two tags with shared images. Deleting the tag should only remove the
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unshared images.
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"""
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with self.assert_gc_integrity():
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repository = self.createRepository(latest=['i1', 'i2', 'i3'], other=['i1', 'f1'])
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self.deleteTag(repository, 'latest')
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self.assertDeleted(repository, 'i2', 'i3')
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self.assertNotDeleted(repository, 'i1', 'f1')
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def test_unrelated_repositories(self):
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""" Two repositories with different images. Removing the tag from one leaves the other's
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images intact.
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"""
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with self.assert_gc_integrity():
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repository1 = self.createRepository(latest=['i1', 'i2', 'i3'], name='repo1')
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repository2 = self.createRepository(latest=['j1', 'j2', 'j3'], name='repo2')
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self.deleteTag(repository1, 'latest')
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self.assertDeleted(repository1, 'i1', 'i2', 'i3')
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self.assertNotDeleted(repository2, 'j1', 'j2', 'j3')
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def test_related_repositories(self):
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""" Two repositories with shared images. Removing the tag from one leaves the other's
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images intact.
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"""
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with self.assert_gc_integrity():
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repository1 = self.createRepository(latest=['i1', 'i2', 'i3'], name='repo1')
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repository2 = self.createRepository(latest=['i1', 'i2', 'j1'], name='repo2')
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self.deleteTag(repository1, 'latest')
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self.assertDeleted(repository1, 'i3')
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self.assertNotDeleted(repository2, 'i1', 'i2', 'j1')
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def test_inaccessible_repositories(self):
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""" Two repositories under different namespaces should result in the images being deleted
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but not completely removed from the database.
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"""
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with self.assert_gc_integrity():
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repository1 = self.createRepository(namespace=ADMIN_ACCESS_USER, latest=['i1', 'i2', 'i3'])
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repository2 = self.createRepository(namespace=PUBLIC_USER, latest=['i1', 'i2', 'i3'])
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self.deleteTag(repository1, 'latest')
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self.assertDeleted(repository1, 'i1', 'i2', 'i3')
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self.assertNotDeleted(repository2, 'i1', 'i2', 'i3')
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def test_multiple_shared_images(self):
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""" Repository has multiple tags with shared images. Selectively deleting the tags, and
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verifying at each step.
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"""
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with self.assert_gc_integrity():
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repository = self.createRepository(latest=['i1', 'i2', 'i3'], other=['i1', 'f1', 'f2'],
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third=['t1', 't2', 't3'], fourth=['i1', 'f1'])
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# Delete tag other. Should delete f2, since it is not shared.
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self.deleteTag(repository, 'other')
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self.assertDeleted(repository, 'f2')
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self.assertNotDeleted(repository, 'i1', 'i2', 'i3', 't1', 't2', 't3', 'f1')
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# Move tag fourth to i3. This should remove f1 since it is no longer referenced.
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self.moveTag(repository, 'fourth', 'i3')
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self.assertDeleted(repository, 'f1')
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self.assertNotDeleted(repository, 'i1', 'i2', 'i3', 't1', 't2', 't3')
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# Delete tag 'latest'. This should do nothing since fourth is on the same branch.
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self.deleteTag(repository, 'latest')
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self.assertNotDeleted(repository, 'i1', 'i2', 'i3', 't1', 't2', 't3')
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# Delete tag 'third'. This should remove t1->t3.
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self.deleteTag(repository, 'third')
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self.assertDeleted(repository, 't1', 't2', 't3')
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self.assertNotDeleted(repository, 'i1', 'i2', 'i3')
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# Add tag to i1.
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self.moveTag(repository, 'newtag', 'i1')
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self.assertNotDeleted(repository, 'i1', 'i2', 'i3')
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# Delete tag 'fourth'. This should remove i2 and i3.
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self.deleteTag(repository, 'fourth')
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self.assertDeleted(repository, 'i2', 'i3')
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self.assertNotDeleted(repository, 'i1')
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# Delete tag 'newtag'. This should remove the remaining image.
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self.deleteTag(repository, 'newtag')
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self.assertDeleted(repository, 'i1')
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def test_empty_gc(self):
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with self.assert_gc_integrity(expect_storage_removed=False):
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repository = self.createRepository(latest=['i1', 'i2', 'i3'], other=['i1', 'f1', 'f2'],
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third=['t1', 't2', 't3'], fourth=['i1', 'f1'])
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self.gcNow(repository)
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self.assertNotDeleted(repository, 'i1', 'i2', 'i3', 't1', 't2', 't3', 'f1', 'f2')
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def test_time_machine_no_gc(self):
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""" Repository has two tags with shared images. Deleting the tag should not remove any images
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"""
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with self.assert_gc_integrity(expect_storage_removed=False):
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repository = self.createRepository(latest=['i1', 'i2', 'i3'], other=['i1', 'f1'])
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self._set_tag_expiration_policy(repository.namespace_user.username, 60*60*24)
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self.deleteTag(repository, 'latest')
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self.assertNotDeleted(repository, 'i2', 'i3')
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self.assertNotDeleted(repository, 'i1', 'f1')
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def test_time_machine_gc(self):
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""" Repository has two tags with shared images. Deleting the second tag should cause the images
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for the first deleted tag to gc.
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"""
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with self.assert_gc_integrity():
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repository = self.createRepository(latest=['i1', 'i2', 'i3'], other=['i1', 'f1'])
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self._set_tag_expiration_policy(repository.namespace_user.username, 1)
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self.deleteTag(repository, 'latest')
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self.assertNotDeleted(repository, 'i2', 'i3')
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self.assertNotDeleted(repository, 'i1', 'f1')
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time.sleep(2)
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self.deleteTag(repository, 'other') # This will cause the images associated with latest to gc
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self.assertDeleted(repository, 'i2', 'i3')
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self.assertNotDeleted(repository, 'i1', 'f1')
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def test_images_shared_storage(self):
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""" Repository with two tags, both with the same shared storage. Deleting the first
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tag should delete the first image, but *not* its storage.
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"""
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with self.assert_gc_integrity(expect_storage_removed=False):
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repository = self.createRepository()
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# Add two tags, each with their own image, but with the same storage.
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image_storage = model.storage.create_v1_storage(storage.preferred_locations[0])
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first_image = Image.create(docker_image_id='i1',
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repository=repository, storage=image_storage,
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ancestors='/')
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second_image = Image.create(docker_image_id='i2',
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repository=repository, storage=image_storage,
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ancestors='/')
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model.tag.store_tag_manifest(repository.namespace_user.username, repository.name,
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'first', first_image.docker_image_id,
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'sha:someshahere', '{}')
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model.tag.store_tag_manifest(repository.namespace_user.username, repository.name,
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'second', second_image.docker_image_id,
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'sha:someshahere', '{}')
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# Delete the first tag.
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self.deleteTag(repository, 'first')
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self.assertDeleted(repository, 'i1')
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self.assertNotDeleted(repository, 'i2')
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def test_image_with_cas(self):
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""" A repository with a tag pointing to an image backed by CAS. Deleting and GCing the tag
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should result in the storage and its CAS data being removed.
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"""
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with self.assert_gc_integrity(expect_storage_removed=True):
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repository = self.createRepository()
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# Create an image storage record under CAS.
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content = 'hello world'
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digest = 'sha256:' + hashlib.sha256(content).hexdigest()
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preferred = storage.preferred_locations[0]
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storage.put_content({preferred}, storage.blob_path(digest), content)
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image_storage = database.ImageStorage.create(content_checksum=digest, uploading=False)
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location = database.ImageStorageLocation.get(name=preferred)
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database.ImageStoragePlacement.create(location=location, storage=image_storage)
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# Ensure the CAS path exists.
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self.assertTrue(storage.exists({preferred}, storage.blob_path(digest)))
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# Create the image and the tag.
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first_image = Image.create(docker_image_id='i1',
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repository=repository, storage=image_storage,
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ancestors='/')
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model.tag.store_tag_manifest(repository.namespace_user.username, repository.name,
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'first', first_image.docker_image_id,
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'sha:someshahere1', '{}')
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self.assertNotDeleted(repository, 'i1')
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# Delete the tag.
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|
self.deleteTag(repository, 'first')
|
|
self.assertDeleted(repository, 'i1')
|
|
|
|
# Ensure the CAS path is gone.
|
|
self.assertFalse(storage.exists({preferred}, storage.blob_path(digest)))
|
|
|
|
def test_images_shared_cas(self):
|
|
""" A repository, each two tags, pointing to the same image, which has image storage
|
|
with the same *CAS path*, but *distinct records*. Deleting the first tag should delete the
|
|
first image, and its storage, but not the file in storage, as it shares its CAS path.
|
|
"""
|
|
with self.assert_gc_integrity(expect_storage_removed=True):
|
|
repository = self.createRepository()
|
|
|
|
# Create two image storage records with the same content checksum.
|
|
content = 'hello world'
|
|
digest = 'sha256:' + hashlib.sha256(content).hexdigest()
|
|
preferred = storage.preferred_locations[0]
|
|
storage.put_content({preferred}, storage.blob_path(digest), content)
|
|
|
|
is1 = database.ImageStorage.create(content_checksum=digest, uploading=False)
|
|
is2 = database.ImageStorage.create(content_checksum=digest, uploading=False)
|
|
|
|
location = database.ImageStorageLocation.get(name=preferred)
|
|
|
|
database.ImageStoragePlacement.create(location=location, storage=is1)
|
|
database.ImageStoragePlacement.create(location=location, storage=is2)
|
|
|
|
# Ensure the CAS path exists.
|
|
self.assertTrue(storage.exists({preferred}, storage.blob_path(digest)))
|
|
|
|
# Create two images in the repository, and two tags, each pointing to one of the storages.
|
|
first_image = Image.create(docker_image_id='i1',
|
|
repository=repository, storage=is1,
|
|
ancestors='/')
|
|
|
|
second_image = Image.create(docker_image_id='i2',
|
|
repository=repository, storage=is2,
|
|
ancestors='/')
|
|
|
|
model.tag.store_tag_manifest(repository.namespace_user.username, repository.name,
|
|
'first', first_image.docker_image_id,
|
|
'sha:someshahere1', '{}')
|
|
|
|
model.tag.store_tag_manifest(repository.namespace_user.username, repository.name,
|
|
'second', second_image.docker_image_id,
|
|
'sha:someshahere2', '{}')
|
|
|
|
self.assertNotDeleted(repository, 'i1', 'i2')
|
|
|
|
# Delete the first tag.
|
|
self.deleteTag(repository, 'first')
|
|
self.assertDeleted(repository, 'i1')
|
|
self.assertNotDeleted(repository, 'i2')
|
|
|
|
# Ensure the CAS path still exists.
|
|
self.assertTrue(storage.exists({preferred}, storage.blob_path(digest)))
|
|
|
|
def test_images_shared_cas_with_new_blob_table(self):
|
|
""" A repository with a tag and image that shares its CAS path with a record in the new Blob
|
|
table. Deleting the first tag should delete the first image, and its storage, but not the
|
|
file in storage, as it shares its CAS path with the blob row.
|
|
"""
|
|
with self.assert_gc_integrity(expect_storage_removed=True):
|
|
repository = self.createRepository()
|
|
|
|
# Create two image storage records with the same content checksum.
|
|
content = 'hello world'
|
|
digest = 'sha256:' + hashlib.sha256(content).hexdigest()
|
|
preferred = storage.preferred_locations[0]
|
|
storage.put_content({preferred}, storage.blob_path(digest), content)
|
|
|
|
media_type = database.MediaType.get(name='text/plain')
|
|
|
|
is1 = database.ImageStorage.create(content_checksum=digest, uploading=False)
|
|
is2 = database.Blob.create(digest=digest, size=0, media_type=media_type)
|
|
|
|
location = database.ImageStorageLocation.get(name=preferred)
|
|
database.ImageStoragePlacement.create(location=location, storage=is1)
|
|
|
|
# Ensure the CAS path exists.
|
|
self.assertTrue(storage.exists({preferred}, storage.blob_path(digest)))
|
|
|
|
# Create the image in the repository, and the tag.
|
|
first_image = Image.create(docker_image_id='i1',
|
|
repository=repository, storage=is1,
|
|
ancestors='/')
|
|
|
|
model.tag.store_tag_manifest(repository.namespace_user.username, repository.name,
|
|
'first', first_image.docker_image_id,
|
|
'sha:someshahere1', '{}')
|
|
|
|
self.assertNotDeleted(repository, 'i1')
|
|
|
|
# Delete the tag.
|
|
self.deleteTag(repository, 'first')
|
|
self.assertDeleted(repository, 'i1')
|
|
|
|
# Ensure the CAS path still exists, as it is referenced by the Blob table.
|
|
self.assertTrue(storage.exists({preferred}, storage.blob_path(digest)))
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|