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141 commits

Author SHA1 Message Date
Derek McGowan
174a732c94 Remove deprecated client interface
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
2015-05-15 17:56:27 -07:00
Derek McGowan
ce614b6de8 Add client implementation of distribution interface
Adds functionality to create a Repository client which connects to a remote endpoint.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
2015-05-15 17:56:27 -07:00
Stephen J Day
593bbccdb5 Refactor Blob Service API
This PR refactors the blob service API to be oriented around blob descriptors.
Identified by digests, blobs become an abstract entity that can be read and
written using a descriptor as a handle. This allows blobs to take many forms,
such as a ReadSeekCloser or a simple byte buffer, allowing blob oriented
operations to better integrate with blob agnostic APIs (such as the `io`
package). The error definitions are now better organized to reflect conditions
that can only be seen when interacting with the blob API.

The main benefit of this is to separate the much smaller metadata from large
file storage. Many benefits also follow from this. Reading and writing has
been separated into discrete services. Backend implementation is also
simplified, by reducing the amount of metadata that needs to be picked up to
simply serve a read. This also improves cacheability.

"Opening" a blob simply consists of an access check (Stat) and a path
calculation. Caching is greatly simplified and we've made the mapping of
provisional to canonical hashes a first-class concept. BlobDescriptorService
and BlobProvider can be combined in different ways to achieve varying effects.

Recommend Review Approach
-------------------------

This is a very large patch. While apologies are in order, we are getting a
considerable amount of refactoring. Most changes follow from the changes to
the root package (distribution), so start there. From there, the main changes
are in storage. Looking at (*repository).Blobs will help to understand the how
the linkedBlobStore is wired. One can explore the internals within and also
branch out into understanding the changes to the caching layer. Following the
descriptions below will also help to guide you.

To reduce the chances for regressions, it was critical that major changes to
unit tests were avoided. Where possible, they are left untouched and where
not, the spirit is hopefully captured. Pay particular attention to where
behavior may have changed.

Storage
-------

The primary changes to the `storage` package, other than the interface
updates, were to merge the layerstore and blobstore. Blob access is now
layered even further. The first layer, blobStore, exposes a global
`BlobStatter` and `BlobProvider`. Operations here provide a fast path for most
read operations that don't take access control into account. The
`linkedBlobStore` layers on top of the `blobStore`, providing repository-
scoped blob link management in the backend. The `linkedBlobStore` implements
the full `BlobStore` suite, providing access-controlled, repository-local blob
writers. The abstraction between the two is slightly broken in that
`linkedBlobStore` is the only channel under which one can write into the global
blob store. The `linkedBlobStore` also provides flexibility in that it can act
over different link sets depending on configuration. This allows us to use the
same code for signature links, manifest links and blob links.  Eventually, we
will fully consolidate this storage.

The improved cache flow comes from the `linkedBlobStatter` component
of `linkedBlobStore`. Using a `cachedBlobStatter`, these combine together to
provide a simple cache hierarchy that should streamline access checks on read
and write operations, or at least provide a single path to optimize. The
metrics have been changed in a slightly incompatible way since the former
operations, Fetch and Exists, are no longer relevant.

The fileWriter and fileReader have been slightly modified to support the rest
of the changes. The most interesting is the removal of the `Stat` call from
`newFileReader`. This was the source of unnecessary round trips that were only
present to look up the size of the resulting reader. Now, one must simply pass
in the size, requiring the caller to decide whether or not the `Stat` call is
appropriate. In several cases, it turned out the caller already had the size
already. The `WriterAt` implementation has been removed from `fileWriter`,
since it is no longer required for `BlobWriter`, reducing the number of paths
which writes may take.

Cache
-----

Unfortunately, the `cache` package required a near full rewrite. It was pretty
mechanical in that the cache is oriented around the `BlobDescriptorService`
slightly modified to include the ability to set the values for individual
digests. While the implementation is oriented towards caching, it can act as a
primary store. Provisions are in place to have repository local metadata, in
addition to global metadata. Fallback is implemented as a part of the storage
package to maintain this flexibility.

One unfortunate side-effect is that caching is now repository-scoped, rather
than global. This should have little effect on performance but may increase
memory usage.

Handlers
--------

The `handlers` package has been updated to leverage the new API. For the most
part, the changes are superficial or mechanical based on the API changes. This
did expose a bug in the handling of provisional vs canonical digests that was
fixed in the unit tests.

Configuration
-------------

One user-facing change has been made to the configuration and is updated in
the associated documentation. The `layerinfo` cache parameter has been
deprecated by the `blobdescriptor` cache parameter. Both are equivalent and
configuration files should be backward compatible.

Notifications
-------------

Changes the `notification` package are simply to support the interface
changes.

Context
-------

A small change has been made to the tracing log-level. Traces have been moved
from "info" to "debug" level to reduce output when not needed.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-05-15 17:05:18 -07:00
Stephen Day
aeda6f5f8f Merge pull request #518 from RichardScothern/cache-headers
Set cache headers for layers.
2015-05-12 18:32:16 -07:00
Richard
3dc2d849c7 Set cache headers for layers.
- Set an Etag header
     - Check If-None-Match and respond appropriately
     - Set a Cache-Control header with a default of 1 week

Signed-off-by: Richard Scothern <richard.scothern@gmail.com>
2015-05-12 17:49:18 -07:00
Anton Tiurin
ad80cbe1ea [Server] Listen and serve on a unix socket
Allow to use a unix socket as a listener.
To specify an endpoint type we use an optional configuration
field 'net', as there's no way to distinguish a relative
socket path from a hostname.

Signed-off-by: Anton Tiurin <noxiouz@yandex.ru>
2015-05-11 16:00:14 +03:00
Derek McGowan
2cf40ab790 Modify blob upload API
- Ensures new uploads and resumed upload statuses always return an offset of 0. This allows future clients which support resumable upload to not attempt resumable upload on this version which does not support it.
- Add PATCH support for streaming data on upload.
- Add messaging to specification that PATCH with content range is currently not supported.
- Update PUT blob to only support full data or no data, no more last chunk messaging as it was not supported.

closes #470

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
2015-05-06 15:43:23 -07:00
Richard
70f853e787 Ensure the instrumentedResponseWriter correctly sets the http
status in the context.

Signed-off-by: Richard Scothern <richard.scothern@gmail.com>
2015-05-05 16:46:33 -07:00
Stephen Day
dd58ffe6ed Merge pull request #410 from RichardScothern/driver-context
Add golang/x/net/context.Context to storage driver method calls
2015-05-04 19:18:30 -07:00
Derek McGowan
7d6e6aa980 Update API spec to reference digest instead of tarsum
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
2015-05-01 17:14:38 -07:00
Stephen J Day
69e477f2d5 Use done channel to avoid goroutine leak
This deals with a memory leak, caused by goroutines, experienced when using the
s3 driver. Unfortunately, this section of the code leaks goroutines like a
sieve. There is probably some refactoring that could be done to avoid this but
instead, we have a done channel that will cause waiting goroutines to exit.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-28 14:40:20 -07:00
Richard
ae216e365a Make Storage Driver API calls context aware.
- Change driver interface to take a context as its first argument
     - Make newFileReader take a context as its first argument
     - Make newFileWriter take a context as its first argument
     - Make blobstore exists and delete take a context as a first argument
     - Pass the layerreader's context to the storage layer
     - Pass the app's context to purgeuploads
     - Store the app's context into the blobstore (was previously null)
     - Pass the trace'd context to the storage drivers

Signed-off-by: Richard Scothern <richard.scothern@gmail.com>
2015-04-27 15:58:58 -07:00
Stephen Day
70427e3d9f Merge pull request #381 from RichardScothern/purge-config
Add configuration for upload purging
2015-04-27 14:33:34 -07:00
Richard
6460ddb2cb Add configuration for upload purging
Signed-off-by: Richard Scothern <richard.scothern@gmail.com>
2015-04-27 11:06:15 -07:00
xiekeyang
c89e517be1 simplify the embedded method expression of repository
Signed-off-by: xiekeyang <xiekeyang@huawei.com>
2015-04-27 16:33:58 +08:00
Josh Hawn
628c7fa77b Updated urlbuilder X-Forwarded-Host logic
According to the Apache mod_proxy docs, X-Forwarded-Host can be a
comma-separated list of hosts, to which each proxy appends the requested
host. We want to grab only the first from this comma-separated list
to get the original requested Host when building URLs.

Docker-DCO-1.1-Signed-off-by: Josh Hawn <josh.hawn@docker.com> (github: jlhawn)
2015-04-24 14:16:49 -07:00
Olivier Gambier
9b6d49fdb0 Merge pull request #430 from stevvooe/address-s3-timeout-error
Attempt to address intermittent s3 RequestTimeout error
2015-04-24 11:20:30 -07:00
Stephen Day
528869ac03 Merge pull request #420 from stevvooe/expose-drivernames
Expose storage driver names for tracing
2015-04-24 10:53:40 -07:00
Stephen J Day
e6715c5cec Attempt to address intermittent s3 RequestTimeout error
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-23 20:07:32 -07:00
Stephen J Day
6dd27cd2cb Correctly check s3 chunksize parameter
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-23 16:31:41 -07:00
Stephen J Day
f6d75a6139 Return after error in handler
This adds a missing return statement. It is not strictly needed since if the
io.Copy fails, the Finish operation will fail. Currently, the client reports
both errors where this new code will correctly only report the io.Copy error.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-23 13:13:13 -07:00
Stephen J Day
d7eb17fd72 Include driver name in trace messsages
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-22 17:30:31 -07:00
Stephen J Day
9e146437e4 Require storage drivers to report their name
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-22 17:30:01 -07:00
Stephen Day
73960f4024 Merge pull request #419 from stevvooe/pool-buffers-s3
Pool buffers used in S3.WriteStream
2015-04-22 16:41:28 -07:00
Stephen J Day
1adab029f6 Pool buffers used in S3.WriteStream
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-22 16:25:53 -07:00
Olivier Gambier
506a5b4a97 Merge pull request #418 from stevvooe/accept-chunksize-parameter
Allow configuration of chunksize parameter
2015-04-22 14:46:40 -07:00
Stephen J Day
72a702d0d9 Allow configuration of chunksize parameter
The code using values from the yaml package wasn't careful enought with the
possible incoming types. Turns out, it is just an int but we've made this
section somewhat bulletproof in case that package changes the behavior.

This code likely never worked. The configuration system should be decoupled
from the object instantiation.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-22 14:31:34 -07:00
Stephen J Day
4330627c71 Check error returned from io.Copy
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-22 12:35:08 -07:00
Stephen Day
aa09c6c262 Merge pull request #408 from stevvooe/increase-retry-backoff
Backoff retry on verification to give s3 time to propagate
2015-04-21 13:19:28 -07:00
Stephen J Day
632e46418b Backoff retry on verification to give s3 time to propagate
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-21 13:04:46 -07:00
Stephen J Day
d8dbcc3efa log canonical digest on verification error
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-21 11:34:18 -07:00
Olivier Gambier
1b975e980b Merge pull request #405 from stevvooe/eventual-consistency
Attempt to deal with eventual consistency by retrying
2015-04-20 18:59:01 -07:00
Stephen J Day
c8345090d9 Attempt to deal with eventual consistency by retrying
Rather than accept the resulting of a layer validation, we retry up to three
times, backing off 100ms after each try. The thought is that we allow s3 files
to make their way into the correct location increasing the liklihood the
verification can proceed, if possible.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-20 18:49:22 -07:00
Richard
3a1029a262 Add logging for generic handler errors.
Signed-off-by: Richard Scothern <richard.scothern@gmail.com>
2015-04-20 17:47:52 -07:00
Stephen Day
7c25fcf698 Merge pull request #375 from RichardScothern/path-logging
registry/storage/driver: add path and other info to filesytem trace methods.
2015-04-17 14:09:23 -07:00
Richard
6b1c2e9b1f Add path and other info to filesytem trace methods.
Also fix Delete (was 'Move').
2015-04-17 13:55:18 -07:00
bin liu
e0521d2d01 fix some typos in source comments
Signed-off-by: bin liu <liubin0329@gmail.com>
2015-04-17 12:39:52 +00:00
Stephen Day
cce1641f9b Merge pull request #333 from RichardScothern/purgeuploads
registry/storage: automatically purge old upload files
2015-04-16 11:16:51 -07:00
Richard
e4f07c368b Automatically purge old upload files.
When the registry starts a background timer will periodically
scan the upload directories on the file system every 24 hours
and delete any files older than 1 week. An initial jitter
intends to avoid contention on the filesystem where multiple
registries with the same storage driver are started
simultaneously.
2015-04-16 10:57:34 -07:00
Stephen Day
c5183a446b Merge pull request #369 from stevvooe/http-request-status-context-manager
context, registry/handlers: instantiate http context before dispatch
2015-04-15 23:23:40 -07:00
Stephen Day
75983a4a7f Merge pull request #364 from ncdc/resumable-digest-optional
Use a build flag to disable resumable digests
2015-04-15 23:22:25 -07:00
Stephen J Day
7420a3de10 Instantiate http context before dispatch
Ensure that the status is logged in the context by instantiating before the
request is routed to handlers. While this requires some level of hacking to
acheive, the result is that the context value of "http.request.status" is as
accurate as possible for each request.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-15 19:53:36 -07:00
Andy Goldstein
7fdd395653 Use a build flag to disable resumable digests.
Signed-off-by: Andy Goldstein <agoldste@redhat.com>
2015-04-16 01:19:57 +00:00
Derek McGowan
21504560e1 Update final upload chunk api doc
Updates description about content length and location

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
2015-04-15 17:55:15 -07:00
Richard
cb6a6125f6 Add auth.user.name to logging context 2015-04-15 10:34:24 -07:00
Richard Scothern
90af0f9b7a Merge pull request #343 from stevvooe/tracing-driver
context, storagedriver: trace function calls to Base storage driver
2015-04-10 16:55:57 -07:00
Stephen J Day
730ce83cdf Trace function calls to Base storage driver
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-04-10 16:42:36 -07:00
Stephen Day
41dd70c901 Merge pull request #349 from RichardScothern/348
Prevent Close() from being called after Finish()
2015-04-10 16:21:01 -07:00
Richard
3d529094fa Prevent Close() from being called after Finish() 2015-04-10 16:00:05 -07:00
Derek McGowan
142d62798e Rename top level registry interface to namespace
Registry is intended to be used as a repository service than an abstract collection of repositories. Namespace better describes a collection of repositories retrievable by name.
The registry service serves any repository in the global scope.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
2015-04-09 19:21:33 -07:00