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Fix after merge

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This commit is contained in:
Joseph Schorr 2018-12-10 15:37:26 -05:00
parent eb7591183d
commit 6963107ec6
1 changed files with 0 additions and 252 deletions
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252
workers/manifestbackfillworker.py
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@ -1,252 +0,0 @@
import logging
import logging.config
import time
import time
from peewee import JOIN, fn, IntegrityError
from app import app
from data.database import (UseThenDisconnect, TagManifest, TagManifestToManifest, Image,
Manifest, db_transaction)
from data.model import DataModelException
from data.model.image import get_parent_images
from data.model.tag import populate_manifest
from data.model.blob import get_repo_blob_by_digest, BlobDoesNotExist
from image.docker.schema1 import (DockerSchema1Manifest, ManifestException, ManifestInterface,
DOCKER_SCHEMA1_SIGNED_MANIFEST_CONTENT_TYPE)
from workers.worker import Worker
from util.log import logfile_path
from util.migrate.allocator import yield_random_entries
logger = logging.getLogger(__name__)
WORKER_TIMEOUT = 600
class BrokenManifest(ManifestInterface):
""" Implementation of the ManifestInterface for "broken" manifests. This allows us to add the
new manifest row while not adding any additional rows for it.
"""
def __init__(self, digest, payload):
self._digest = digest
self._payload = payload
@property
def digest(self):
return self._digest
@property
def media_type(self):
return DOCKER_SCHEMA1_SIGNED_MANIFEST_CONTENT_TYPE
@property
def manifest_dict(self):
return {}
@property
def bytes(self):
return self._payload
def get_layers(self, content_retriever):
return None
def get_legacy_image_ids(self, cr):
return []
def get_leaf_layer_v1_image_id(self, cr):
return None
@property
def blob_digests(self):
return []
@property
def local_blob_digests(self):
return []
def child_manifests(self, lookup_manifest_fn):
return None
def get_manifest_labels(self, lookup_config_fn):
return {}
def unsigned(self):
return self
def generate_legacy_layers(self, images_map, lookup_config_fn):
return None
def get_schema1_manifest(self, namespace_name, repo_name, tag_name, lookup_fn):
return self
@property
def schema_version(self):
return 1
@property
def layers_compressed_size(self):
return None
@property
def is_manifest_list(self):
return False
@property
def has_legacy_image(self):
return False
def get_requires_empty_layer_blob(self, content_retriever):
return False
def convert_manifest(self, media_types, namespace_name, repo_name, tag_name, lookup_fn):
return None
class ManifestBackfillWorker(Worker):
def __init__(self):
super(ManifestBackfillWorker, self).__init__()
self.add_operation(self._backfill_manifests, WORKER_TIMEOUT)
def _candidates_to_backfill(self):
def missing_tmt_query():
return (TagManifest
.select()
.join(TagManifestToManifest, JOIN.LEFT_OUTER)
.where(TagManifestToManifest.id >> None))
min_id = (TagManifest
.select(fn.Min(TagManifest.id))
.join(TagManifestToManifest, JOIN.LEFT_OUTER)
.where(TagManifestToManifest.id >> None)
.scalar())
max_id = TagManifest.select(fn.Max(TagManifest.id)).scalar()
iterator = yield_random_entries(
missing_tmt_query,
TagManifest.id,
100,
max_id,
min_id,
)
return iterator
def _backfill_manifests(self):
with UseThenDisconnect(app.config):
iterator = self._candidates_to_backfill()
if iterator is None:
logger.debug('Found no additional manifest to backfill')
time.sleep(10000)
return None
for candidate, abt, _ in iterator:
if not backfill_manifest(candidate):
logger.info('Another worker pre-empted us for manifest: %s', candidate.id)
abt.set()
def lookup_map_row(tag_manifest):
try:
TagManifestToManifest.get(tag_manifest=tag_manifest)
return True
except TagManifestToManifest.DoesNotExist:
return False
def backfill_manifest(tag_manifest):
logger.info('Backfilling manifest %s', tag_manifest.id)
# Ensure that a mapping row doesn't already exist. If it does, we've been preempted.
if lookup_map_row(tag_manifest):
return False
# Parse the manifest. If we cannot parse, then we treat the manifest as broken and just emit it
# without additional rows or data, as it will eventually not be useful.
is_broken = False
try:
manifest = DockerSchema1Manifest.for_latin1_bytes(tag_manifest.json_data, validate=False)
except ManifestException:
logger.exception('Exception when trying to parse manifest %s', tag_manifest.id)
manifest = BrokenManifest(tag_manifest.digest, tag_manifest.json_data)
is_broken = True
# Lookup the storages for the digests.
root_image = tag_manifest.tag.image
repository = tag_manifest.tag.repository
image_storage_id_map = {root_image.storage.content_checksum: root_image.storage.id}
try:
parent_images = get_parent_images(repository.namespace_user.username, repository.name,
root_image)
except DataModelException:
logger.exception('Exception when trying to load parent images for manifest `%s`',
tag_manifest.id)
parent_images = {}
is_broken = True
for parent_image in parent_images:
image_storage_id_map[parent_image.storage.content_checksum] = parent_image.storage.id
# Ensure that all the expected blobs have been found. If not, we lookup the blob under the repo
# and add its storage ID. If the blob is not found, we mark the manifest as broken.
storage_ids = set()
for blob_digest in manifest.blob_digests:
if blob_digest in image_storage_id_map:
storage_ids.add(image_storage_id_map[blob_digest])
else:
logger.debug('Blob `%s` not found in images for manifest `%s`; checking repo',
blob_digest, tag_manifest.id)
try:
blob_storage = get_repo_blob_by_digest(repository.namespace_user.username, repository.name,
blob_digest)
storage_ids.add(blob_storage.id)
except BlobDoesNotExist:
logger.debug('Blob `%s` not found in repo for manifest `%s`',
blob_digest, tag_manifest.id)
is_broken = True
with db_transaction():
# Re-retrieve the tag manifest to ensure it still exists and we're pointing at the correct tag.
try:
tag_manifest = TagManifest.get(id=tag_manifest.id)
except TagManifest.DoesNotExist:
return True
# Ensure it wasn't already created.
if lookup_map_row(tag_manifest):
return False
# Check for a pre-existing manifest matching the digest in the repository. This can happen
# if we've already created the manifest row (typically for tag reverision).
try:
manifest_row = Manifest.get(digest=manifest.digest, repository=tag_manifest.tag.repository)
except Manifest.DoesNotExist:
# Create the new-style rows for the manifest.
try:
manifest_row = populate_manifest(tag_manifest.tag.repository, manifest,
tag_manifest.tag.image, storage_ids)
except IntegrityError:
# Pre-empted.
return False
# Create the mapping row. If we find another was created for this tag manifest in the
# meantime, then we've been preempted.
try:
TagManifestToManifest.create(tag_manifest=tag_manifest, manifest=manifest_row,
broken=is_broken)
return True
except IntegrityError:
return False
if __name__ == "__main__":
logging.config.fileConfig(logfile_path(debug=False), disable_existing_loggers=False)
if not app.config.get('BACKFILL_TAG_MANIFESTS', False):
logger.debug('Manifest backfill disabled; skipping')
while True:
time.sleep(100000)
worker = ManifestBackfillWorker()
worker.start()