Merge pull request #2388 from coreos-inc/max-layer-size

Make maximum layer size configurable

conf/init/nginx_conf_create.sh

@@ -28,19 +28,17 @@ def generate_server_config(config):
   """
   Generates server config from the app config
   """
-  if config:
+  config = config or {}
   tuf_server = config.get('TUF_SERVER', None)
   tuf_host = config.get('TUF_HOST', None)
   signing_enabled = config.get('FEATURE_SIGNING', False)
-  else:
+  maximum_layer_size = config.get('MAXIMUM_LAYER_SIZE', '20G')
-    tuf_server = None
-    tuf_host = None
-    signing_enabled = False
 
   write_config('conf/nginx/server-base.conf',
                tuf_server=tuf_server,
                tuf_host=tuf_host,
-               signing_enabled=signing_enabled)
+               signing_enabled=signing_enabled,
+               maximum_layer_size=maximum_layer_size)
 
 
 if __name__ == "__main__":

conf/nginx/server-base.conf.jnj

@@ -109,7 +109,7 @@ location ~ ^/v2 {
     proxy_pass   http://registry_app_server;
     proxy_temp_path /tmp 1 2;
 
-    client_max_body_size 20G;
+    client_max_body_size {{ maximum_layer_size }};
 }
 
 location ~ ^/v1 {
@@ -127,7 +127,7 @@ location ~ ^/v1 {
     proxy_pass   http://registry_app_server;
     proxy_temp_path /tmp 1 2;
 
-    client_max_body_size 20G;
+    client_max_body_size {{ maximum_layer_size }};
 }
 
 location /v1/_ping {

config.py

@@ -426,3 +426,6 @@ class DefaultConfig(object):
 
   # Server where TUF metadata can be found
   TUF_SERVER = None
+
+  # Maximum size allowed for layers in the registry.
+  MAXIMUM_LAYER_SIZE = '20G'

data/database.py

@@ -1004,12 +1004,12 @@ class RepositoryAuthorizedEmail(BaseModel):
 class BlobUpload(BaseModel):
   repository = ForeignKeyField(Repository)
   uuid = CharField(index=True, unique=True)
-  byte_count = IntegerField(default=0)
+  byte_count = BigIntegerField(default=0)
   sha_state = ResumableSHA256Field(null=True, default=resumablehashlib.sha256)
   location = ForeignKeyField(ImageStorageLocation)
   storage_metadata = JSONField(null=True, default={})
   chunk_count = IntegerField(default=0)
-  uncompressed_byte_count = IntegerField(null=True)
+  uncompressed_byte_count = BigIntegerField(null=True)
   created = DateTimeField(default=datetime.now, index=True)
   piece_sha_state = ResumableSHA1Field(null=True)
   piece_hashes = Base64BinaryField(null=True)

data/migrations/versions/b8ae68ad3e52_change_blobupload_fields_to_bigintegers_.py

@@ -0,0 +1,24 @@
+"""Change BlobUpload fields to BigIntegers to allow layers > 8GB
+
+Revision ID: b8ae68ad3e52
+Revises: 7a525c68eb13
+Create Date: 2017-02-27 11:26:49.182349
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'b8ae68ad3e52'
+down_revision = '7a525c68eb13'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+def upgrade(tables):
+    op.alter_column('blobupload', 'byte_count', existing_type=sa.Integer(), type_=sa.BigInteger())
+    op.alter_column('blobupload', 'uncompressed_byte_count', existing_type=sa.Integer(), type_=sa.BigInteger())
+
+
+def downgrade(tables):
+    op.alter_column('blobupload', 'byte_count', existing_type=sa.BigInteger(), type_=sa.Integer())
+    op.alter_column('blobupload', 'uncompressed_byte_count', existing_type=sa.BigInteger(), type_=sa.Integer())

endpoints/v2/blob.py

@@ -4,6 +4,7 @@ import time
 
 from flask import url_for, request, redirect, Response, abort as flask_abort
 
+import bitmath
 import resumablehashlib
 
 from app import storage, app, get_app_url, metric_queue
@@ -14,7 +15,7 @@ from digest import digest_tools
 from endpoints.common import parse_repository_name
 from endpoints.v2 import v2_bp, require_repo_read, require_repo_write, get_input_stream
 from endpoints.v2.errors import (BlobUnknown, BlobUploadInvalid, BlobUploadUnknown, Unsupported,
-                                 NameUnknown)
+                                 NameUnknown, LayerTooLarge)
 from endpoints.decorators import anon_protect
 from util.cache import cache_control
 from util.registry.filelike import wrap_with_handler, StreamSlice
@@ -346,6 +347,8 @@ def _upload_chunk(blob_upload, range_header):
 
   Returns a BlobUpload object or None if there was a failure.
   """
+  max_layer_size = bitmath.parse_string_unsafe(app.config['MAXIMUM_LAYER_SIZE'])
+
   # Get the offset and length of the current chunk.
   start_offset, length = _start_offset_and_length(range_header)
   if blob_upload is None or None in {start_offset, length}:
@@ -356,6 +359,11 @@ def _upload_chunk(blob_upload, range_header):
     logger.error('start_offset provided to _upload_chunk greater than blob.upload.byte_count')
     return None
 
+  # Check if we should raise 413 before accepting the data.
+  uploaded = bitmath.Byte(length + start_offset)
+  if length > -1 and uploaded > max_layer_size:
+    raise LayerTooLarge(uploaded=uploaded.bytes, max_allowed=max_layer_size.bytes)
+
   location_set = {blob_upload.location_name}
 
   upload_error = None
@@ -435,6 +443,11 @@ def _upload_chunk(blob_upload, range_header):
   blob_upload.byte_count += length_written
   blob_upload.chunk_count += 1
 
+  # Ensure we have not gone beyond the max layer size.
+  upload_size = bitmath.Byte(blob_upload.byte_count)
+  if upload_size > max_layer_size:
+    raise LayerTooLarge(uploaded=upload_size.bytes, max_allowed=max_layer_size.bytes)
+
   return blob_upload
 
 

endpoints/v2/errors.py

@@ -1,3 +1,5 @@
+import bitmath
+
 class V2RegistryException(Exception):
   def __init__(self, error_code_str, message, detail, http_status_code=400,
                repository=None, scopes=None):
@@ -112,6 +114,21 @@ class TagInvalid(V2RegistryException):
                                      'manifest tag did not match URI',
                                      detail)
 
+class LayerTooLarge(V2RegistryException):
+  def __init__(self, uploaded=None, max_allowed=None):
+    detail = {}
+    message = 'Uploaded blob is larger than allowed by this registry'
+
+    if uploaded is not None and max_allowed is not None:
+      detail = {
+        'reason': '%s is greater than maximum allowed size %s' % (uploaded, max_allowed),
+        'max_allowed': max_allowed,
+        'uploaded': uploaded,
+      }
+
+      up_str = bitmath.Byte(uploaded).best_prefix().format("{value:.2f} {unit}")
+      max_str = bitmath.Byte(max_allowed).best_prefix().format("{value:.2f} {unit}")
+      message = 'Uploaded blob of %s is larger than %s allowed by this registry' % (up_str, max_str)
 
 class Unauthorized(V2RegistryException):
   def __init__(self, detail=None, repository=None, scopes=None):

requirements-nover.txt

@@ -20,6 +20,7 @@ autobahn==0.9.3-3
 beautifulsoup4
 bencode
 bintrees
+bitmath
 boto
 cachetools==1.1.6
 cryptography

requirements.txt

@@ -8,6 +8,7 @@ Babel==2.3.4
 beautifulsoup4==4.5.1
 bencode==1.0
 bintrees==2.0.4
+bitmath==1.3.1.2
 blinker==1.4
 boto==2.43.0
 cachetools==1.1.6