Merge pull request #2344 from stevvooe/prepare-2.5.2

[release/2.5] release: prepare for 2.5.2 release

.mailmap

@@ -16,3 +16,4 @@ davidli <wenquan.li@hp.com> davidli <wenquan.li@hpe.com>
 Omer Cohen <git@omer.io> Omer Cohen <git@omerc.net>
 Eric Yang <windfarer@gmail.com> Eric Yang <Windfarer@users.noreply.github.com>
 Nikita Tarasov <nikita@mygento.ru> Nikita <luckyraul@users.noreply.github.com>
+Misty Stanley-Jones <misty@docker.com> Misty Stanley-Jones <misty@apache.org>

AUTHORS

@@ -16,9 +16,9 @@ Andrew T Nguyen <andrew.nguyen@docker.com>
 Andrey Kostov <kostov.andrey@gmail.com>
 Andy Goldstein <agoldste@redhat.com>
 Anis Elleuch <vadmeste@gmail.com>
-Anton Tiurin <noxiouz@yandex.ru>
 Antonio Mercado <amercado@thinknode.com>
 Antonio Murdaca <runcom@redhat.com>
+Anton Tiurin <noxiouz@yandex.ru>
 Arien Holthuizen <aholthuizen@schubergphilis.com>
 Arnaud Porterie <arnaud.porterie@docker.com>
 Arthur Baars <arthur@semmle.com>
@@ -31,6 +31,8 @@ bin liu <liubin0329@gmail.com>
 Brian Bland <brian.bland@docker.com>
 burnettk <burnettk@gmail.com>
 Carson A <ca@carsonoid.net>
+Cezar Sa Espinola <cezarsa@gmail.com>
+Charles Smith <charles.smith@docker.com>
 Chris Dillon <squarism@gmail.com>
 cyli <cyli@twistedmatrix.com>
 Daisuke Fujita <dtanshi45@gmail.com>
@@ -39,15 +41,16 @@ Darren Shepherd <darren@rancher.com>
 Dave Trombley <dave.trombley@gmail.com>
 Dave Tucker <dt@docker.com>
 David Lawrence <david.lawrence@docker.com>
+davidli <wenquan.li@hp.com>
 David Verhasselt <david@crowdway.com>
 David Xia <dxia@spotify.com>
-davidli <wenquan.li@hp.com>
 Dejan Golja <dejan@golja.org>
 Derek McGowan <derek@mcgstyle.net>
 Diogo Mónica <diogo.monica@gmail.com>
 DJ Enriquez <dj.enriquez@infospace.com>
 Donald Huang <don.hcd@gmail.com>
 Doug Davis <dug@us.ibm.com>
+Edgar Lee <edgar.lee@docker.com>
 Eric Yang <windfarer@gmail.com>
 Fabio Huser <fabio@fh1.ch>
 farmerworking <farmerworking@gmail.com>
@@ -58,8 +61,8 @@ gabriell nascimento <gabriell@bluesoft.com.br>
 Gleb Schukin <gschukin@ptsecurity.com>
 harche <p.harshal@gmail.com>
 Henri Gomez <henri.gomez@gmail.com>
-Hu Keping <hukeping@huawei.com>
 Hua Wang <wanghua.humble@gmail.com>
+Hu Keping <hukeping@huawei.com>
 HuKeping <hukeping@huawei.com>
 Ian Babrou <ibobrik@gmail.com>
 igayoso <igayoso@gmail.com>
@@ -70,20 +73,20 @@ Jessie Frazelle <jessie@docker.com>
 jhaohai <jhaohai@foxmail.com>
 Jianqing Wang <tsing@jianqing.org>
 John Starks <jostarks@microsoft.com>
+Jonathan Boulle <jonathanboulle@gmail.com>
 Jon Johnson <jonjohnson@google.com>
 Jon Poler <jonathan.poler@apcera.com>
-Jonathan Boulle <jonathanboulle@gmail.com>
 Jordan Liggitt <jliggitt@redhat.com>
 Josh Hawn <josh.hawn@docker.com>
 Julien Fernandez <julien.fernandez@gmail.com>
-Ke Xu <leonhartx.k@gmail.com>
 Keerthan Mala <kmala@engineyard.com>
 Kelsey Hightower <kelsey.hightower@gmail.com>
 Kenneth Lim <kennethlimcp@gmail.com>
 Kenny Leung <kleung@google.com>
-Li Yi <denverdino@gmail.com>
-Liu Hua <sdu.liu@huawei.com>
+Ke Xu <leonhartx.k@gmail.com>
 liuchang0812 <liuchang0812@gmail.com>
+Liu Hua <sdu.liu@huawei.com>
+Li Yi <denverdino@gmail.com>
 Louis Kottmann <louis.kottmann@gmail.com>
 Luke Carpenter <x@rubynerd.net>
 Mary Anthony <mary@docker.com>
@@ -94,6 +97,7 @@ Matt Robenolt <matt@ydekproductions.com>
 Michael Prokop <mika@grml.org>
 Michal Minar <miminar@redhat.com>
 Miquel Sabaté <msabate@suse.com>
+Misty Stanley-Jones <misty@docker.com>
 Morgan Bauer <mbauer@us.ibm.com>
 moxiegirl <mary@docker.com>
 Nathan Sullivan <nathan@nightsys.net>
@@ -113,6 +117,7 @@ Rodolfo Carvalho <rhcarvalho@gmail.com>
 Rusty Conover <rusty@luckydinosaur.com>
 Sean Boran <Boran@users.noreply.github.com>
 Sebastiaan van Stijn <github@gone.nl>
+Sebastien Coavoux <s.coavoux@free.fr>
 Serge Dubrouski <sergeyfd@gmail.com>
 Sharif Nassar <sharif@mrwacky.com>
 Shawn Falkner-Horine <dreadpirateshawn@gmail.com>
@@ -134,11 +139,12 @@ Tonis Tiigi <tonistiigi@gmail.com>
 Tony Holdstock-Brown <tony@docker.com>
 Trevor Pounds <trevor.pounds@gmail.com>
 Troels Thomsen <troels@thomsen.io>
+Victoria Bialas <victoria.bialas@docker.com>
 Vincent Batts <vbatts@redhat.com>
 Vincent Demeester <vincent@sbr.pm>
 Vincent Giersch <vincent.giersch@ovh.net>
-W. Trevor King <wking@tremily.us>
 weiyuan.yl <weiyuan.yl@alibaba-inc.com>
+W. Trevor King <wking@tremily.us>
 xg.song <xg.song@venusource.com>
 xiekeyang <xiekeyang@huawei.com>
 Yann ROBERT <yann.robert@anantaplex.fr>

cmd/registry/main.go

@@ -13,6 +13,7 @@ import (
 	_ "github.com/docker/distribution/registry/storage/driver/gcs"
 	_ "github.com/docker/distribution/registry/storage/driver/inmemory"
 	_ "github.com/docker/distribution/registry/storage/driver/middleware/cloudfront"
+	_ "github.com/docker/distribution/registry/storage/driver/middleware/redirect"
 	_ "github.com/docker/distribution/registry/storage/driver/oss"
 	_ "github.com/docker/distribution/registry/storage/driver/s3-aws"
 	_ "github.com/docker/distribution/registry/storage/driver/s3-goamz"

contrib/token-server/main.go

@@ -176,6 +176,18 @@ func filterAccessList(ctx context.Context, scope string, requestedAccessList []a
 	return grantedAccessList
 }
 
+type acctSubject struct{}
+
+func (acctSubject) String() string { return "acctSubject" }
+
+type requestedAccess struct{}
+
+func (requestedAccess) String() string { return "requestedAccess" }
+
+type grantedAccess struct{}
+
+func (grantedAccess) String() string { return "grantedAccess" }
+
 // getToken handles authenticating the request and authorizing access to the
 // requested scopes.
 func (ts *tokenServer) getToken(ctx context.Context, w http.ResponseWriter, r *http.Request) {
@@ -218,17 +230,17 @@ func (ts *tokenServer) getToken(ctx context.Context, w http.ResponseWriter, r *h
 
 	username := context.GetStringValue(ctx, "auth.user.name")
 
-	ctx = context.WithValue(ctx, "acctSubject", username)
-	ctx = context.WithLogger(ctx, context.GetLogger(ctx, "acctSubject"))
+	ctx = context.WithValue(ctx, acctSubject{}, username)
+	ctx = context.WithLogger(ctx, context.GetLogger(ctx, acctSubject{}))
 
 	context.GetLogger(ctx).Info("authenticated client")
 
-	ctx = context.WithValue(ctx, "requestedAccess", requestedAccessList)
-	ctx = context.WithLogger(ctx, context.GetLogger(ctx, "requestedAccess"))
+	ctx = context.WithValue(ctx, requestedAccess{}, requestedAccessList)
+	ctx = context.WithLogger(ctx, context.GetLogger(ctx, requestedAccess{}))
 
 	grantedAccessList := filterAccessList(ctx, username, requestedAccessList)
-	ctx = context.WithValue(ctx, "grantedAccess", grantedAccessList)
-	ctx = context.WithLogger(ctx, context.GetLogger(ctx, "grantedAccess"))
+	ctx = context.WithValue(ctx, grantedAccess{}, grantedAccessList)
+	ctx = context.WithLogger(ctx, context.GetLogger(ctx, grantedAccess{}))
 
 	token, err := ts.issuer.CreateJWT(username, service, grantedAccessList)
 	if err != nil {
@@ -340,17 +352,17 @@ func (ts *tokenServer) postToken(ctx context.Context, w http.ResponseWriter, r *
 		return
 	}
 
-	ctx = context.WithValue(ctx, "acctSubject", subject)
-	ctx = context.WithLogger(ctx, context.GetLogger(ctx, "acctSubject"))
+	ctx = context.WithValue(ctx, acctSubject{}, subject)
+	ctx = context.WithLogger(ctx, context.GetLogger(ctx, acctSubject{}))
 
 	context.GetLogger(ctx).Info("authenticated client")
 
-	ctx = context.WithValue(ctx, "requestedAccess", requestedAccessList)
-	ctx = context.WithLogger(ctx, context.GetLogger(ctx, "requestedAccess"))
+	ctx = context.WithValue(ctx, requestedAccess{}, requestedAccessList)
+	ctx = context.WithLogger(ctx, context.GetLogger(ctx, requestedAccess{}))
 
 	grantedAccessList := filterAccessList(ctx, subject, requestedAccessList)
-	ctx = context.WithValue(ctx, "grantedAccess", grantedAccessList)
-	ctx = context.WithLogger(ctx, context.GetLogger(ctx, "grantedAccess"))
+	ctx = context.WithValue(ctx, grantedAccess{}, grantedAccessList)
+	ctx = context.WithLogger(ctx, context.GetLogger(ctx, grantedAccess{}))
 
 	token, err := ts.issuer.CreateJWT(subject, service, grantedAccessList)
 	if err != nil {

docs/Dockerfile

@@ -1,9 +0,0 @@
-FROM docs/base:oss
-MAINTAINER Docker Docs <docs@docker.com>
-
-ENV PROJECT=registry
-
-# To get the git info for this repo
-COPY . /src
-RUN rm -rf /docs/content/$PROJECT/
-COPY . /docs/content/$PROJECT/

docs/Makefile

@@ -1,38 +0,0 @@
-.PHONY: all default docs docs-build docs-shell shell test
-
-# to allow `make DOCSDIR=docs docs-shell` (to create a bind mount in docs)
-DOCS_MOUNT := $(if $(DOCSDIR),-v $(CURDIR)/$(DOCSDIR):/$(DOCSDIR))
-
-# to allow `make DOCSPORT=9000 docs`
-DOCSPORT := 8000
-
-# Get the IP ADDRESS
-DOCKER_IP=$(shell python -c "import urlparse ; print urlparse.urlparse('$(DOCKER_HOST)').hostname or ''")
-HUGO_BASE_URL=$(shell test -z "$(DOCKER_IP)" && echo localhost || echo "$(DOCKER_IP)")
-HUGO_BIND_IP=0.0.0.0
-
-GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
-GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
-DOCKER_DOCS_IMAGE := registry-docs$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
-
-DOCKER_RUN_DOCS := docker run --rm -it $(DOCS_MOUNT) -e AWS_S3_BUCKET -e NOCACHE
-
-# for some docs workarounds (see below in "docs-build" target)
-GITCOMMIT := $(shell git rev-parse --short HEAD 2>/dev/null)
-
-default: docs
-
-docs: docs-build
-	$(DOCKER_RUN_DOCS) -p $(if $(DOCSPORT),$(DOCSPORT):)8000 -e DOCKERHOST "$(DOCKER_DOCS_IMAGE)" hugo server --port=$(DOCSPORT) --baseUrl=$(HUGO_BASE_URL) --bind=$(HUGO_BIND_IP)
-
-docs-draft: docs-build
-	$(DOCKER_RUN_DOCS) -p $(if $(DOCSPORT),$(DOCSPORT):)8000 -e DOCKERHOST "$(DOCKER_DOCS_IMAGE)" hugo server --buildDrafts="true" --port=$(DOCSPORT) --baseUrl=$(HUGO_BASE_URL) --bind=$(HUGO_BIND_IP)
-
-docs-shell: docs-build
-	$(DOCKER_RUN_DOCS) -p $(if $(DOCSPORT),$(DOCSPORT):)8000 "$(DOCKER_DOCS_IMAGE)" bash
-
-docs-build:
-	docker build -t "$(DOCKER_DOCS_IMAGE)" .
-
-test: docs-build
-	$(DOCKER_RUN_DOCS) "$(DOCKER_DOCS_IMAGE)"

docs/README.md

@@ -0,0 +1,16 @@
+# The docs have been moved!
+
+The documentation for Registry has been merged into
+[the general documentation repo](https://github.com/docker/docker.github.io).
+Commit history has been preserved.
+
+The docs for Registry are now here:
+https://github.com/docker/docker.github.io/tree/master/registry
+
+> Note: The definitive [./spec directory](spec/) directory and
+[configuration.md](configuration.md) file will be maintained in this repository
+and be refreshed periodically in
+[the general documentation repo](https://github.com/docker/docker.github.io).
+
+As always, the docs in the general repo remain open-source and we appreciate
+your feedback and pull requests!

docs/architecture.md

@@ -1,54 +0,0 @@
-<!--[metadata]>
-+++
-draft = true
-+++
-<![end-metadata]-->
-
-# Architecture
-
-## Design
-**TODO(stevvooe):** Discuss the architecture of the registry, internally and externally, in a few different deployment scenarios.
-
-### Eventual Consistency
-
-> **NOTE:** This section belongs somewhere, perhaps in a design document. We
-> are leaving this here so the information is not lost.
-
-Running the registry on eventually consistent backends has been part of the
-design from the beginning. This section covers some of the approaches to
-dealing with this reality.
-
-There are a few classes of issues that we need to worry about when
-implementing something on top of the storage drivers:
-
-1. Read-After-Write consistency (see this [article on
-   s3](http://shlomoswidler.com/2009/12/read-after-write-consistency-in-amazon.html)).
-2. [Write-Write Conflicts](http://en.wikipedia.org/wiki/Write%E2%80%93write_conflict).
-
-In reality, the registry must worry about these kinds of errors when doing the
-following:
-
-1. Accepting data into a temporary upload file may not have latest data block
-   yet (read-after-write).
-2. Moving uploaded data into its blob location (write-write race).
-3. Modifying the "current" manifest for given tag (write-write race).
-4. A whole slew of operations around deletes (read-after-write, delete-write
-   races, garbage collection, etc.).
-
-The backend path layout employs a few techniques to avoid these problems:
-
-1. Large writes are done to private upload directories. This alleviates most
-   of the corruption potential under multiple writers by avoiding multiple
-   writers.
-2. Constraints in storage driver implementations, such as support for writing
-   after the end of a file to extend it.
-3. Digest verification to avoid data corruption.
-4. Manifest files are stored by digest and cannot change.
-5. All other non-content files (links, hashes, etc.) are written as an atomic
-   unit. Anything that requires additions and deletions is broken out into
-   separate "files". Last writer still wins.
-
-Unfortunately, one must play this game when trying to build something like
-this on top of eventually consistent storage systems. If we run into serious
-problems, we can wrap the storagedrivers in a shared consistency layer but
-that would increase complexity and hinder registry cluster performance.

docs/compatibility.md

@@ -1,84 +0,0 @@
-<!--[metadata]>
-+++
-title = "Compatibility"
-description = "describes get by digest pitfall"
-keywords = ["registry, manifest, images, tags, repository, distribution, digest"]
-[menu.main]
-parent="smn_registry_ref"
-weight=9
-+++
-<![end-metadata]-->
-
-# Registry Compatibility
-
-## Synopsis
-*If a manifest is pulled by _digest_ from a registry 2.3 with Docker Engine 1.9
-and older, and the manifest was pushed with Docker Engine 1.10, a security check
-will cause the Engine to receive a manifest it cannot use and the pull will fail.*
-
-## Registry Manifest Support
-
-Historically, the registry has supported a [single manifest type](./spec/manifest-v2-1.md)
-known as _Schema 1_.
-
-With the move toward multiple architecture images the distribution project
-introduced two new manifest types:  Schema 2 manifests and manifest lists.  The
-registry 2.3 supports all three manifest types and in order to be compatible
-with older Docker engines will, in certain cases, do an on-the-fly
-transformation of a manifest before serving the JSON in the response.
-
-This conversion has some implications for pulling manifests by digest and this
-document enumerate these implications.
-
-
-## Content Addressable Storage (CAS)
-
-Manifests are stored and retrieved in the registry by keying off a digest
-representing a hash of the contents.  One of the advantages provided by CAS is
-security: if the contents are changed, then the digest will no longer match.
-This prevents any modification of the manifest by a MITM attack or an untrusted
-third party.
-
-When a manifest is stored by the registry, this digest is returned in the HTTP
-response headers and, if events are configured, delivered within the event.  The
-manifest can either be retrieved by the tag, or this digest.
-
-For registry versions 2.2.1 and below, the registry will always store and
-serve _Schema 1_ manifests.  The Docker Engine 1.10 will first
-attempt to send a _Schema 2_ manifest, falling back to sending a
-Schema 1 type manifest when it detects that the registry does not
-support the new version.
-
-
-## Registry v2.3
-
-### Manifest Push with Docker 1.9 and Older
-
-The Docker Engine will construct a _Schema 1_ manifest which the
-registry will persist to disk.
-
-When the manifest is pulled by digest or tag with any docker version, a
-_Schema 1_ manifest will be returned.
-
-### Manifest Push with Docker 1.10
-
-The docker engine will construct a _Schema 2_ manifest which the
-registry will persist to disk.
-
-When the manifest is pulled by digest or tag with Docker Engine 1.10, a
-_Schema 2_ manifest will be returned.  The Docker Engine 1.10
-understands the new manifest format.
-
-When the manifest is pulled by *tag* with Docker Engine 1.9 and older, the
-manifest is converted on-the-fly to _Schema 1_ and sent in the
-response.  The Docker Engine 1.9 is compatible with this older format.
-
-*When the manifest is pulled by _digest_ with Docker Engine 1.9 and older, the
-same rewriting process will not happen in the registry.  If this were to happen
-the digest would no longer match the hash of the manifest and would violate the
-constraints of CAS.*
-
-For this reason if a manifest is pulled by _digest_ from a registry 2.3 with Docker
-Engine 1.9 and older, and the manifest was pushed with Docker Engine 1.10, a
-security check will cause the Engine to receive a manifest it cannot use and the
-pull will fail.

docs/deploying.md

@@ -1,237 +0,0 @@
-<!--[metadata]>
-+++
-title = "Deploying a registry server"
-description = "Explains how to deploy a registry"
-keywords = ["registry, on-prem, images, tags, repository, distribution, deployment"]
-[menu.main]
-parent="smn_registry"
-weight=3
-+++
-<![end-metadata]-->
-
-# Deploying a registry server
-
-You need to [install Docker version 1.6.0 or newer](/engine/installation/index.md).
-
-## Running on localhost
-
-Start your registry:
-
-    docker run -d -p 5000:5000 --restart=always --name registry registry:2
-
-You can now use it with docker.
-
-Get any image from the hub and tag it to point to your registry:
-
-    docker pull ubuntu && docker tag ubuntu localhost:5000/ubuntu
-
-... then push it to your registry:
-
-    docker push localhost:5000/ubuntu
-
-... then pull it back from your registry:
-
-    docker pull localhost:5000/ubuntu
-
-To stop your registry, you would:
-
-    docker stop registry && docker rm -v registry
-
-## Storage
-
-By default, your registry data is persisted as a [docker volume](/engine/tutorials/dockervolumes.md) on the host filesystem. Properly understanding volumes is essential if you want to stick with a local filesystem storage.
-
-Specifically, you might want to point your volume location to a specific place in order to more easily access your registry data. To do so you can:
-
-    docker run -d -p 5000:5000 --restart=always --name registry \
-      -v `pwd`/data:/var/lib/registry \
-      registry:2
-
-### Alternatives
-
-You should usually consider using [another storage backend](./storage-drivers/index.md) instead of the local filesystem. Use the [storage configuration options](./configuration.md#storage) to configure an alternate storage backend.
-
-Using one of these will allow you to more easily scale your registry, and leverage your storage redundancy and availability features.
-
-## Running a domain registry
-
-While running on `localhost` has its uses, most people want their registry to be more widely available. To do so, the Docker engine requires you to secure it using TLS, which is conceptually very similar to configuring your web server with SSL.
-
-### Get a certificate
-
-Assuming that you own the domain `myregistrydomain.com`, and that its DNS record points to the host where you are running your registry, you first need to get a certificate from a CA.
-
-Create a `certs` directory:
-
-    mkdir -p certs
-
-Then move and/or rename your crt file to: `certs/domain.crt`, and your key file to: `certs/domain.key`.
-
-Make sure you stopped your registry from the previous steps, then start your registry again with TLS enabled:
-
-    docker run -d -p 5000:5000 --restart=always --name registry \
-      -v `pwd`/certs:/certs \
-      -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/domain.crt \
-      -e REGISTRY_HTTP_TLS_KEY=/certs/domain.key \
-      registry:2
-
-You should now be able to access your registry from another docker host:
-
-    docker pull ubuntu
-    docker tag ubuntu myregistrydomain.com:5000/ubuntu
-    docker push myregistrydomain.com:5000/ubuntu
-    docker pull myregistrydomain.com:5000/ubuntu
-
-#### Gotcha
-
-A certificate issuer may supply you with an *intermediate* certificate. In this case, you must combine your certificate with the intermediate's to form a *certificate bundle*. You can do this using the `cat` command:
-
-    cat domain.crt intermediate-certificates.pem > certs/domain.crt
-
-### Let's Encrypt
-
-The registry supports using Let's Encrypt to automatically obtain a browser-trusted certificate.  For more
-information on Let's Encrypt, see [https://letsencrypt.org/how-it-works/](https://letsencrypt.org/how-it-works/) and the relevant section of the [registry configuration](configuration.md#letsencrypt).
-
-### Alternatives
-
-While rarely advisable, you may want to use self-signed certificates instead, or use your registry in an insecure fashion. You will find instructions [here](insecure.md).
-
-## Load Balancing Considerations
-
-One may want to use a load balancer to distribute load, terminate TLS or
-provide high availability. While a full load balancing setup is outside the
-scope of this document, there are a few considerations that can make the process
-smoother.
-
-The most important aspect is that a load balanced cluster of registries must
-share the same resources. For the current version of the registry, this means
-the following must be the same:
-
-  - Storage Driver
-  - HTTP Secret
-  - Redis Cache (if configured)
-
-If any of these are different, the registry will have trouble serving requests.
-As an example, if you're using the filesystem driver, all registry instances
-must have access to the same filesystem root, which means they should be in
-the same machine. For other drivers, such as s3 or azure, they should be
-accessing the same resource, and will likely share an identical configuration.
-The _HTTP Secret_ coordinates uploads, so also must be the same across
-instances. Configuring different redis instances will work (at the time
-of writing), but will not be optimal if the instances are not shared, causing
-more requests to be directed to the backend.
-
-#### Important/Required HTTP-Headers
-Getting the headers correct is very important. For all responses to any
-request under the "/v2/" url space, the `Docker-Distribution-API-Version`
-header should be set to the value "registry/2.0", even for a 4xx response.
-This header allows the docker engine to quickly resolve authentication realms
-and fallback to version 1 registries, if necessary. Confirming this is setup
-correctly can help avoid problems with fallback.
-
-In the same train of thought, you must make sure you are properly sending the
-`X-Forwarded-Proto`, `X-Forwarded-For` and `Host` headers to their "client-side"
-values. Failure to do so usually makes the registry issue redirects to internal
-hostnames or downgrading from https to http.
-
-A properly secured registry should return 401 when the "/v2/" endpoint is hit
-without credentials. The response should include a `WWW-Authenticate`
-challenge, providing guidance on how to authenticate, such as with basic auth
-or a token service. If the load balancer has health checks, it is recommended
-to configure it to consider a 401 response as healthy and any other as down.
-This will secure your registry by ensuring that configuration problems with
-authentication don't accidentally expose an unprotected registry. If you're
-using a less sophisticated load balancer, such as Amazon's Elastic Load
-Balancer, that doesn't allow one to change the healthy response code, health
-checks can be directed at "/", which will always return a `200 OK` response.
-
-## Restricting access
-
-Except for registries running on secure local networks, registries should always implement access restrictions.
-
-### Native basic auth
-
-The simplest way to achieve access restriction is through basic authentication (this is very similar to other web servers' basic authentication mechanism).
-
-> **Warning**: You **cannot** use authentication with an insecure registry. You have to [configure TLS first](#running-a-domain-registry) for this to work.
-
-First create a password file with one entry for the user "testuser", with password "testpassword":
-
-    mkdir auth
-    docker run --entrypoint htpasswd registry:2 -Bbn testuser testpassword > auth/htpasswd
-
-Make sure you stopped your registry from the previous step, then start it again:
-
-    docker run -d -p 5000:5000 --restart=always --name registry \
-      -v `pwd`/auth:/auth \
-      -e "REGISTRY_AUTH=htpasswd" \
-      -e "REGISTRY_AUTH_HTPASSWD_REALM=Registry Realm" \
-      -e REGISTRY_AUTH_HTPASSWD_PATH=/auth/htpasswd \
-      -v `pwd`/certs:/certs \
-      -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/domain.crt \
-      -e REGISTRY_HTTP_TLS_KEY=/certs/domain.key \
-      registry:2
-
-You should now be able to:
-
-    docker login myregistrydomain.com:5000
-
-And then push and pull images as an authenticated user.
-
-#### Gotcha
-
-Seeing X509 errors is usually a sign you are trying to use self-signed certificates, and failed to [configure your docker daemon properly](insecure.md).
-
-### Alternatives
-
-1. You may want to leverage more advanced basic auth implementations through a proxy design, in front of the registry. You will find examples of such patterns in the [recipes list](recipes/index.md).
-
-2. Alternatively, the Registry also supports delegated authentication, redirecting users to a specific, trusted token server. That approach requires significantly more investment, and only makes sense if you want to fully configure ACLs and more control over the Registry integration into your global authorization and authentication systems.
-
-You will find [background information here](spec/auth/token.md), and [configuration information here](configuration.md#auth).
-
-Beware that you will have to implement your own authentication service for this to work, or leverage a third-party implementation.
-
-## Managing with Compose
-
-As your registry configuration grows more complex, dealing with it can quickly become tedious.
-
-It's highly recommended to use [Docker Compose](/compose/index.md) to facilitate operating your registry.
-
-Here is a simple `docker-compose.yml` example that condenses everything explained so far:
-
-```
-registry:
-  restart: always
-  image: registry:2
-  ports:
-    - 5000:5000
-  environment:
-    REGISTRY_HTTP_TLS_CERTIFICATE: /certs/domain.crt
-    REGISTRY_HTTP_TLS_KEY: /certs/domain.key
-    REGISTRY_AUTH: htpasswd
-    REGISTRY_AUTH_HTPASSWD_PATH: /auth/htpasswd
-    REGISTRY_AUTH_HTPASSWD_REALM: Registry Realm
-  volumes:
-    - /path/data:/var/lib/registry
-    - /path/certs:/certs
-    - /path/auth:/auth
-```
-
-> **Warning**: replace `/path` by whatever directory that holds your `certs` and `auth` folder from above.
-
-You can then start your registry with a simple
-
-    docker-compose up -d
-
-## Next
-
-You will find more specific and advanced informations in the following sections:
-
- - [Configuration reference](configuration.md)
- - [Working with notifications](notifications.md)
- - [Advanced "recipes"](recipes/index.md)
- - [Registry API](spec/api.md)
- - [Storage driver model](storage-drivers/index.md)
- - [Token authentication](spec/auth/token.md)

docs/deprecated.md

@@ -1,27 +0,0 @@
-<!--[metadata]>
-+++
-title = "Deprecated Features"
-description = "describes deprecated functionality"
-keywords = ["registry, manifest, images, signatures, repository, distribution, digest"]
-[menu.main]
-parent="smn_registry_ref"
-weight=8
-+++
-<![end-metadata]-->
-
-# Docker Registry Deprecation
-
-This document details functionality or components which are deprecated within
-the registry.
-
-### v2.5.0
-
-The signature store has been removed from the registry.  Since `v2.4.0` it has
-been possible to configure the registry to generate manifest signatures rather
-than load them from storage.   In this version of the registry this becomes
-the default behavior.  Signatures which are attached to manifests on put are
-not stored in the registry.  This does not alter the functional behavior of
-the registry.
-
-Old signatures blobs can be removed from the registry storage by running the
-garbage-collect subcommand.

docs/garbage-collection.md

@@ -1,137 +0,0 @@
-<!--[metadata]>
-+++
-title = "Garbage Collection"
-description = "High level discussion of garbage collection"
-keywords = ["registry, garbage, images, tags, repository, distribution"]
-[menu.main]
-parent="smn_registry_ref"
-weight=4
-+++
-<![end-metadata]-->
-
-# Garbage Collection
-
-As of v2.4.0 a garbage collector command is included within the registry binary.
-This document describes what this command does and how and why it should be used.
-
-## What is Garbage Collection?
-
-From [wikipedia](https://en.wikipedia.org/wiki/Garbage_collection_(computer_science)):
-
-"In computer science, garbage collection (GC) is a form of automatic memory management. The
-garbage collector, or just collector, attempts to reclaim garbage, or memory occupied by
-objects that are no longer in use by the program."
-
-In the context of the Docker registry, garbage collection is the process of
-removing blobs from the filesystem which are no longer referenced by a
-manifest.  Blobs can include both layers and manifests.
-
-
-## Why Garbage Collection?
-
-Registry data can occupy considerable amounts of disk space and freeing up
-this disk space is an oft-requested feature.  Additionally for reasons of security it
-can be desirable to ensure that certain layers no longer exist on the filesystem.
-
-
-## Garbage Collection in the Registry
-
-Filesystem layers are stored by their content address in the Registry.  This
-has many advantages, one of which is that data is stored once and referred to by manifests.
-See [here](compatibility.md#content-addressable-storage-cas) for more details.
-
-Layers are therefore shared amongst manifests; each manifest maintains a reference
-to the layer.  As long as a layer is referenced by one manifest, it cannot be garbage
-collected.
-
-Manifests and layers can be 'deleted` with the registry API (refer to the API
-documentation [here](spec/api.md#deleting-a-layer) and
-[here](spec/api.md#deleting-an-image) for details).  This API removes references
-to the target and makes them eligible for garbage collection.  It also makes them
-unable to be read via the API.
-
-If a layer is deleted it will be removed from the filesystem when garbage collection
-is run.  If a manifest is deleted the layers to which it refers will be removed from
-the filesystem if no other manifests refers to them.
-
-
-### Example
-
-In this example manifest A references two layers: `a` and `b`.  Manifest `B` references
-layers `a` and `c`.  In this state, nothing is eligible for garbage collection:
-
-```
-A -----> a <----- B
-    \--> b     |
-         c <--/
-```
-
-Manifest B is deleted via the API:
-
-```
-A -----> a     B
-    \--> b
-         c
-```
-
-In this state layer `c` no longer has a reference and is eligible for garbage
-collection.  Layer `a` had one reference removed but will not be garbage
-collected as it is still referenced by manifest `A`.  The blob representing
-manifest `B` will also be eligible for garbage collection.
-
-After garbage collection has been run manifest `A` and its blobs remain.
-
-```
-A -----> a
-    \--> b
-```
-
-
-## How Garbage Collection works
-
-Garbage collection runs in two phases. First, in the 'mark' phase, the process
-scans all the manifests in the registry. From these manifests, it constructs a
-set of content address digests. This set is the 'mark set' and denotes the set
-of blobs to *not* delete. Secondly, in the 'sweep' phase, the process scans all
-the blobs and if a blob's content address digest is not in the mark set, the
-process will delete it.
-
-
-> **NOTE** You should ensure that the registry is in read-only mode or not running at
-> all. If you were to upload an image while garbage collection is running, there is the
-> risk that the image's layers will be mistakenly deleted, leading to a corrupted image.
-
-This type of garbage collection is known as stop-the-world garbage collection.  In future
-registry versions the intention is that garbage collection will be an automated background
-action and this manual process will no longer apply.
-
-
-
-# Running garbage collection
-
-Garbage collection can be run as follows
-
-`bin/registry garbage-collect [--dry-run] /path/to/config.yml`
-
-The garbage-collect command accepts a `--dry-run` parameter, which will print the progress
-of the mark and sweep phases without removing any data.  Running with a log leve of `info`
-will give a clear indication of what will and will not be deleted.
-
-_Sample output from a dry run garbage collection with registry log level set to `info`_
-
-```
-hello-world
-hello-world: marking manifest sha256:fea8895f450959fa676bcc1df0611ea93823a735a01205fd8622846041d0c7cf
-hello-world: marking blob sha256:03f4658f8b782e12230c1783426bd3bacce651ce582a4ffb6fbbfa2079428ecb
-hello-world: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
-hello-world: marking configuration sha256:690ed74de00f99a7d00a98a5ad855ac4febd66412be132438f9b8dbd300a937d
-ubuntu
-
-4 blobs marked, 5 blobs eligible for deletion
-blob eligible for deletion: sha256:28e09fddaacbfc8a13f82871d9d66141a6ed9ca526cb9ed295ef545ab4559b81
-blob eligible for deletion: sha256:7e15ce58ccb2181a8fced7709e9893206f0937cc9543bc0c8178ea1cf4d7e7b5
-blob eligible for deletion: sha256:87192bdbe00f8f2a62527f36bb4c7c7f4eaf9307e4b87e8334fb6abec1765bcb
-blob eligible for deletion: sha256:b549a9959a664038fc35c155a95742cf12297672ca0ae35735ec027d55bf4e97
-blob eligible for deletion: sha256:f251d679a7c61455f06d793e43c06786d7766c88b8c24edf242b2c08e3c3f599
-```
-

docs/glossary.md

@@ -1,70 +0,0 @@
-<!--[metadata]>
-+++
-draft = true
-+++
-<![end-metadata]-->
-
-# Glossary
-
-This page contains definitions for distribution related terms.
-
-<dl>
-	<dt id="blob"><h4>Blob</h4></dt>
-	<dd>
-      <blockquote>A blob is any kind of content that is stored by a Registry under a content-addressable identifier (a "digest").</blockquote>
-      <p>
-      	<a href="#layer">Layers</a> are a good example of "blobs".
-      </p>
-	</dd>
-
-	<dt id="image"><h4>Image</h4></dt>
-	<dd>
-      <blockquote>An image is a named set of immutable data from which a Docker container can be created.</blockquote>
-      <p>
-      An image is represented by a json file called a <a href="#manifest">manifest</a>, and is conceptually a set of <a hred="#layer">layers</a>.
-
-      Image names indicate the location where they can be pulled from and pushed to, as they usually start with a <a href="#registry">registry</a> domain name and port.
-
-      </p>
-    </dd>
-
-	<dt id="layer"><h4>Layer</h4></dt>
-	<dd>
-	<blockquote>A layer is a tar archive bundling partial content from a filesystem.</blockquote>
-	<p>
-	Layers from an <a href="#image">image</a> are usually extracted in order on top of each other to make up a root filesystem from which containers run out.
-	</p>
-	</dd>
-
-	<dt id="manifest"><h4>Manifest</h4></dt>
-	<dd><blockquote>A manifest is the JSON representation of an image.</blockquote></dd>
-
-	<dt id="namespace"><h4>Namespace</h4></dt>
-	<dd><blockquote>A namespace is a collection of repositories with a common name prefix.</blockquote>
-	<p>
-	The namespace with an empty prefix is considered the Global Namespace.
-	</p>
-	</dd>
-
-	<dt id="registry"><h4>Registry</h4></dt>
-	<dd><blockquote>A registry is a service that let you store and deliver <a href="#images">images</a>.</blockquote>
-	</dd>
-
-	<dt id="registry"><h4>Repository</h4></dt>
-	<dd>
-	<blockquote>A repository is a set of data containing all versions of a given image.</blockquote>
-	</dd>
-
-	<dt id="scope"><h4>Scope</h4></dt>
-	<dd><blockquote>A scope is the portion of a namespace onto which a given authorization token is granted.</blockquote></dd>
-
-	<dt id="tag"><h4>Tag</h4></dt>
-	<dd><blockquote>A tag is conceptually a "version" of a <a href="#image">named image</a>.</blockquote>
-	<p>
-	Example: `docker pull myimage:latest` instructs docker to pull the image "myimage" in version "latest".
-	</p>
-	
-	</dd>
-	
-
-</dl>

docs/help.md

@@ -1,24 +0,0 @@
-<!--[metadata]>
-+++
-title = "Getting help"
-description = "Getting help with the Registry"
-keywords = ["registry, on-prem, images, tags, repository, distribution, help, 101, TL;DR"]
-[menu.main]
-parent="smn_registry"
-weight=9
-+++
-<![end-metadata]-->
-
-# Getting help
-
-If you need help, or just want to chat, you can reach us:
-
-- on irc: `#docker-distribution` on freenode
-- on the [mailing list](https://groups.google.com/a/dockerproject.org/forum/#!forum/distribution) (mail at <distribution@dockerproject.org>)
-
-If you want to report a bug:
-
-- be sure to first read about [how to contribute](https://github.com/docker/distribution/blob/master/CONTRIBUTING.md)
-- you can then do so on the [GitHub project bugtracker](https://github.com/docker/distribution/issues)
-
-You can also find out more about the Docker's project [Getting Help resources](/opensource/get-help.md).

docs/index.md

@@ -1,67 +0,0 @@
-<!--[metadata]>
-+++
-title = "Registry Overview"
-description = "High-level overview of the Registry"
-keywords = ["registry, on-prem, images, tags, repository, distribution"]
-aliases = ["/registry/overview/"]
-[menu.main]
-parent="smn_registry"
-weight=1
-+++
-<![end-metadata]-->
-
-# Docker Registry
-
-## What it is
-
-The Registry is a stateless, highly scalable server side application that stores and lets you distribute Docker images.
-The Registry is open-source, under the permissive [Apache license](http://en.wikipedia.org/wiki/Apache_License).
-
-## Why use it
-
-You should use the Registry if you want to:
-
- * tightly control where your images are being stored
- * fully own your images distribution pipeline
- * integrate image storage and distribution tightly into your in-house development workflow
-
-## Alternatives
-
-Users looking for a zero maintenance, ready-to-go solution are encouraged to head-over to the [Docker Hub](https://hub.docker.com), which provides a free-to-use, hosted Registry, plus additional features (organization accounts, automated builds, and more).
-
-Users looking for a commercially supported version of the Registry should look into [Docker Trusted Registry](https://docs.docker.com/docker-trusted-registry/overview/).
-
-## Requirements
-
-The Registry is compatible with Docker engine **version 1.6.0 or higher**.
-If you really need to work with older Docker versions, you should look into the [old python registry](https://github.com/docker/docker-registry).
-
-## TL;DR
-
-Start your registry
-
-    docker run -d -p 5000:5000 --name registry registry:2
-
-Pull (or build) some image from the hub
-
-    docker pull ubuntu
-
-Tag the image so that it points to your registry
-
-    docker tag ubuntu localhost:5000/myfirstimage
-
-Push it
-
-    docker push localhost:5000/myfirstimage
-
-Pull it back
-
-    docker pull localhost:5000/myfirstimage
-
-Now stop your registry and remove all data
-
-    docker stop registry && docker rm -v registry
-
-## Next
-
-You should now read the [detailed introduction about the registry](introduction.md), or jump directly to [deployment instructions](deploying.md).

docs/insecure.md

@@ -1,114 +0,0 @@
-<!--[metadata]>
-+++
-title = "Testing an insecure registry"
-description = "Deploying a Registry in an insecure fashion"
-keywords = ["registry, on-prem, images, tags, repository, distribution, insecure"]
-[menu.main]
-parent="smn_registry_ref"
-weight=5
-+++
-<![end-metadata]-->
-
-# Insecure Registry
-
-While it's highly recommended to secure your registry using a TLS certificate
-issued by a known CA, you may alternatively decide to use self-signed
-certificates, or even use your registry over plain http.
-
-You have to understand the downsides in doing so, and the extra burden in
-configuration.
-
-## Deploying a plain HTTP registry
-
-> **Warning**: it's not possible to use an insecure registry with basic authentication.
-
-This basically tells Docker to entirely disregard security for your registry.
-While this is relatively easy to configure the daemon in this way, it is
-**very** insecure. It does expose your registry to trivial MITM. Only use this
-solution for isolated testing or in a tightly controlled, air-gapped
-environment.
-
-1. Open the `/etc/default/docker` file or `/etc/sysconfig/docker` for editing.
-
-    Depending on your operating system, your Engine daemon start options.
-
-2. Edit (or add) the `DOCKER_OPTS` line and add the `--insecure-registry` flag.
-
-    This flag takes the URL of your registry, for example.
-
-    `DOCKER_OPTS="--insecure-registry myregistrydomain.com:5000"`
-
-3. Close and save the configuration file.
-
-4. Restart your Docker daemon
-
-    The command you use to restart the daemon depends on your operating system.
-    For example, on Ubuntu, this is usually the `service docker stop` and `service
-    docker start` command.
-
-5. Repeat this configuration on every Engine host that wants to access your registry.
-
-
-## Using self-signed certificates
-
-> **Warning**: using this along with basic authentication requires to **also** trust the certificate into the OS cert store for some versions of docker (see below)
-
-This is more secure than the insecure registry solution.  You must configure every docker daemon that wants to access your registry
-
-1. Generate your own certificate:
-
-    mkdir -p certs && openssl req \
-      -newkey rsa:4096 -nodes -sha256 -keyout certs/domain.key \
-      -x509 -days 365 -out certs/domain.crt
-
-2. Be sure to use the name `myregistrydomain.com` as a CN.
-
-3. Use the result to [start your registry with TLS enabled](./deploying.md#get-a-certificate)
-
-4. Instruct every docker daemon to trust that certificate.
-
-    This is done by copying the `domain.crt` file to `/etc/docker/certs.d/myregistrydomain.com:5000/ca.crt`.
-
-5. Don't forget to restart the Engine daemon.
-
-## Troubleshooting insecure registry
-
-This sections lists some common failures and how to recover from them.
-
-### Failing...
-
-Failing to configure the Engine daemon and trying to pull from a registry that is not using
-TLS will results in the following message:
-
-```
-FATA[0000] Error response from daemon: v1 ping attempt failed with error:
-Get https://myregistrydomain.com:5000/v1/_ping: tls: oversized record received with length 20527.
-If this private registry supports only HTTP or HTTPS with an unknown CA certificate,please add
-`--insecure-registry myregistrydomain.com:5000` to the daemon's arguments.
-In the case of HTTPS, if you have access to the registry's CA certificate, no need for the flag;
-simply place the CA certificate at /etc/docker/certs.d/myregistrydomain.com:5000/ca.crt
-```
-
-### Docker still complains about the certificate when using authentication?
-
-When using authentication, some versions of docker also require you to trust the certificate at the OS level. Usually, on Ubuntu this is done with:
-
-```bash
-$ cp certs/domain.crt /usr/local/share/ca-certificates/myregistrydomain.com.crt
-update-ca-certificates
-```
-
-... and on Red Hat (and its derivatives) with:
-
-```bash
-cp certs/domain.crt /etc/pki/ca-trust/source/anchors/myregistrydomain.com.crt
-update-ca-trust
-```
-
-... On some distributions, e.g. Oracle Linux 6, the Shared System Certificates feature needs to be manually enabled:
-
-```bash
-$ update-ca-trust enable
-```
-
-Now restart docker (`service docker stop && service docker start`, or any other way you use to restart docker).

docs/introduction.md

@@ -1,55 +0,0 @@
-<!--[metadata]>
-+++
-title = "Understanding the Registry"
-description = "Explains what the Registry is, basic use cases and requirements"
-keywords = ["registry, on-prem, images, tags, repository, distribution, use cases, requirements"]
-[menu.main]
-parent="smn_registry"
-weight=2
-+++
-<![end-metadata]-->
-
-# Understanding the Registry
-
-A registry is a storage and content delivery system, holding named Docker images, available in different tagged versions.
-
-  > Example: the image `distribution/registry`, with tags `2.0` and `2.1`.
-
-Users interact with a registry by using docker push and pull commands.
-
-  > Example: `docker pull registry-1.docker.io/distribution/registry:2.1`.
-
-Storage itself is delegated to drivers. The default storage driver is the local posix filesystem, which is suitable for development or small deployments. Additional cloud-based storage drivers like S3, Microsoft Azure, OpenStack Swift and Aliyun OSS are also supported. People looking into using other storage backends may do so by writing their own driver implementing the [Storage API](storage-drivers/index.md).
-
-Since securing access to your hosted images is paramount, the Registry natively supports TLS and basic authentication.
-
-The Registry GitHub repository includes additional information about advanced authentication and authorization methods. Only very large or public deployments are expected to extend the Registry in this way.
-
-Finally, the Registry ships with a robust [notification system](notifications.md), calling webhooks in response to activity, and both extensive logging and reporting, mostly useful for large installations that want to collect metrics.
-
-## Understanding image naming
-
-Image names as used in typical docker commands reflect their origin:
-
- * `docker pull ubuntu` instructs docker to pull an image named `ubuntu` from the official Docker Hub. This is simply a shortcut for the longer `docker pull docker.io/library/ubuntu` command
- * `docker pull myregistrydomain:port/foo/bar` instructs docker to contact the registry located at `myregistrydomain:port` to find the image `foo/bar`
-
-You can find out more about the various Docker commands dealing with images in the [official Docker engine documentation](/engine/reference/commandline/cli.md).
-
-## Use cases
-
-Running your own Registry is a great solution to integrate with and complement your CI/CD system. In a typical workflow, a commit to your source revision control system would trigger a build on your CI system, which would then push a new image to your Registry if the build is successful. A notification from the Registry would then trigger a deployment on a staging environment, or notify other systems that a new image is available.
-
-It's also an essential component if you want to quickly deploy a new image over a large cluster of machines.
-
-Finally, it's the best way to distribute images inside an isolated network.
-
-## Requirements
-
-You absolutely need to be familiar with Docker, specifically with regard to pushing and pulling images. You must understand the difference between the daemon and the cli, and at least grasp basic concepts about networking.
-
-Also, while just starting a registry is fairly easy, operating it in a production environment requires operational skills, just like any other service. You are expected to be familiar with systems availability and scalability, logging and log processing, systems monitoring, and security 101. Strong understanding of http and overall network communications, plus familiarity with golang are certainly useful as well for advanced operations or hacking.
-
-## Next
-
-Dive into [deploying your registry](deploying.md)

docs/menu.md

@@ -1,23 +0,0 @@
-<!--[metadata]>
-+++
-title = "Docker Registry"
-description = "High-level overview of the Registry"
-keywords = ["registry, on-prem, images, tags, repository, distribution"]
-type = "menu"
-[menu.main]
-identifier="smn_registry"
-parent="mn_components"
-+++
-<![end-metadata]-->
-
-# Overview of Docker Registry Documentation
-
-The Docker Registry documentation includes the following topics:
-
-* [Docker Registry Introduction](index.md)
-* [Understanding the Registry](introduction.md)
-* [Deploying a registry server](deploying.md)
-* [Registry Configuration Reference](configuration.md)
-* [Notifications](notifications.md)
-* [Recipes](recipes/index.md)
-* [Getting help](help.md)

docs/migration.md

@@ -1,30 +0,0 @@
-<!--[metadata]>
-+++
-draft = true
-+++
-<![end-metadata]-->
-
-# Migrating a 1.0 registry to 2.0
-
-TODO: This needs to be revised in light of Olivier's work
-
-A few thoughts here:
-
-There was no "1.0". There was an implementation of the Registry API V1 but only a version 0.9 of the service was released.
-The image formats are not compatible in any way. One must convert v1 images to v2 images using a docker client or other tool.
-One can migrate images from one version to the other by pulling images from the old registry and pushing them to the v2 registry.
-
------
-
-The Docker Registry 2.0 is backward compatible with images created by the earlier specification. If you are migrating a private registry to version 2.0, you should use the following process:
-
-1. Configure and test a 2.0 registry image in a sandbox environment.
-
-2. Back up up your production image storage.
-
-	Your production image storage should reside on a volume or storage backend.
-	Make sure you have a backup of its contents.
-
-3. Stop your existing registry service.
-
-4. Restart your registry with your tested 2.0 image.

docs/notifications.md

@@ -1,350 +0,0 @@
-<!--[metadata]>
-+++
-title = "Working with notifications"
-description = "Explains how to work with registry notifications"
-keywords = ["registry, on-prem, images, tags, repository, distribution, notifications, advanced"]
-[menu.main]
-parent="smn_registry"
-weight=5
-+++
-<![end-metadata]-->
-
-# Notifications
-
-The Registry supports sending webhook notifications in response to events
-happening within the registry. Notifications are sent in response to manifest
-pushes and pulls and layer pushes and pulls. These actions are serialized into
-events. The events are queued into a registry-internal broadcast system which
-queues and dispatches events to [_Endpoints_](#endpoints).
-
-![](images/notifications.png)
-
-## Endpoints
-
-Notifications are sent to _endpoints_ via HTTP requests. Each configured
-endpoint has isolated queues, retry configuration and http targets within each
-instance of a registry. When an action happens within the registry, it is
-converted into an event which is dropped into an inmemory queue. When the
-event reaches the end of the queue, an http request is made to the endpoint
-until the request succeeds. The events are sent serially to each endpoint but
-order is not guaranteed.
-
-## Configuration
-
-To setup a registry instance to send notifications to endpoints, one must add
-them to the configuration. A simple example follows:
-
-      notifications:
-        endpoints:
-          - name: alistener
-            url: https://mylistener.example.com/event
-            headers:
-              Authorization: [Bearer <your token, if needed>]
-            timeout: 500ms
-            threshold: 5
-            backoff: 1s
-
-The above would configure the registry with an endpoint to send events to
-`https://mylistener.example.com/event`, with the header "Authorization: Bearer
-<your token, if needed>". The request would timeout after 500 milliseconds. If
-5 failures happen consecutively, the registry will backoff for 1 second before
-trying again.
-
-For details on the fields, please see the [configuration documentation](configuration.md#notifications).
-
-A properly configured endpoint should lead to a log message from the registry
-upon startup:
-
-```
-INFO[0000] configuring endpoint alistener (https://mylistener.example.com/event), timeout=500ms, headers=map[Authorization:[Bearer <your token if needed>]]  app.id=812bfeb2-62d6-43cf-b0c6-152f541618a3 environment=development service=registry
-```
-
-## Events
-
-Events have a well-defined JSON structure and are sent as the body of
-notification requests. One or more events are sent in a structure called an
-envelope. Each event has a unique id that can be used to uniquely identify incoming
-requests, if required. Along with that, an _action_ is provided with a
-_target_, identifying the object mutated during the event.
-
-The fields available in an `event` are described below.
-
-Field | Type | Description
------ | ----- | -------------
-id | string |ID provides a unique identifier for the event.
-timestamp | Time | Timestamp is the time at which the event occurred.
-action |  string |  Action indicates what action encompasses the provided event.
-target | distribution.Descriptor | Target uniquely describes the target of the event.
-length | int | Length in bytes of content. Same as Size field in Descriptor.
-repository | string | Repository identifies the named repository.
-fromRepository | string |  FromRepository identifies the named repository which a blob was mounted from if appropriate.
-url | string | URL provides a direct link to the content.
-tag | string | Tag identifies a tag name in tag events
-request | [RequestRecord](https://godoc.org/github.com/docker/distribution/notifications#RequestRecord) | Request covers the request that generated the event.
-actor | [ActorRecord](https://godoc.org/github.com/docker/distribution/notifications#ActorRecord). |  Actor specifies the agent that initiated the event. For most situations, this could be from the authorization context of the request.
-source | [SourceRecord](https://godoc.org/github.com/docker/distribution/notifications#SourceRecord) |  Source identifies the registry node that generated the event. Put differently, while the actor "initiates" the event, the source "generates" it.
-
-
-
-The following is an example of a JSON event, sent in response to the push of a
-manifest:
-
-```json
-{
-   "events": [
-      {
-         "id": "320678d8-ca14-430f-8bb6-4ca139cd83f7",
-         "timestamp": "2016-03-09T14:44:26.402973972-08:00",
-         "action": "pull",
-         "target": {
-            "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
-            "size": 708,
-            "digest": "sha256:fea8895f450959fa676bcc1df0611ea93823a735a01205fd8622846041d0c7cf",
-            "length": 708,
-            "repository": "hello-world",
-            "url": "http://192.168.100.227:5000/v2/hello-world/manifests/sha256:fea8895f450959fa676bcc1df0611ea93823a735a01205fd8622846041d0c7cf",
-            "tag": "latest"
-         },
-         "request": {
-            "id": "6df24a34-0959-4923-81ca-14f09767db19",
-            "addr": "192.168.64.11:42961",
-            "host": "192.168.100.227:5000",
-            "method": "GET",
-            "useragent": "curl/7.38.0"
-         },
-         "actor": {},
-         "source": {
-            "addr": "xtal.local:5000",
-            "instanceID": "a53db899-3b4b-4a62-a067-8dd013beaca4"
-         }
-      }
-   ]
-}
-```
-
-
-The target struct of events which are sent when manifests and blobs are deleted
-will contain a subset of the data contained in Get and Put events.  Specifically,
-only the digest and repository will be sent.
-
-```json
-"target": {
-            "digest": "sha256:d89e1bee20d9cb344674e213b581f14fbd8e70274ecf9d10c514bab78a307845",
-            "repository": "library/test"
-},
-```
-
-> __NOTE:__ As of version 2.1, the `length` field for event targets
-> is being deprecated for the `size` field, bringing the target in line with
-> common nomenclature. Both will continue to be set for the foreseeable
-> future. Newer code should favor `size` but accept either.
-
-## Envelope
-
-The envelope contains one or more events, with the following json structure:
-
-```json
-{
-	"events": [ ... ],
-}
-```
-
-While events may be sent in the same envelope, the set of events within that
-envelope have no implied relationship. For example, the registry may choose to
-group unrelated events and send them in the same envelope to reduce the total
-number of requests.
-
-The full package has the mediatype
-"application/vnd.docker.distribution.events.v1+json", which will be set on the
-request coming to an endpoint.
-
-An example of a full event may look as follows:
-
-```json
-GET /callback
-Host: application/vnd.docker.distribution.events.v1+json
-Authorization: Bearer <your token, if needed>
-Content-Type: application/vnd.docker.distribution.events.v1+json
-
-{
-   "events": [
-      {
-         "id": "asdf-asdf-asdf-asdf-0",
-         "timestamp": "2006-01-02T15:04:05Z",
-         "action": "push",
-         "target": {
-            "mediaType": "application/vnd.docker.distribution.manifest.v1+json",
-            "length": 1,
-            "digest": "sha256:fea8895f450959fa676bcc1df0611ea93823a735a01205fd8622846041d0c7cf",
-            "repository": "library/test",
-            "url": "http://example.com/v2/library/test/manifests/sha256:c3b3692957d439ac1928219a83fac91e7bf96c153725526874673ae1f2023f8d5"
-         },
-         "request": {
-            "id": "asdfasdf",
-            "addr": "client.local",
-            "host": "registrycluster.local",
-            "method": "PUT",
-            "useragent": "test/0.1"
-         },
-         "actor": {
-            "name": "test-actor"
-         },
-         "source": {
-            "addr": "hostname.local:port"
-         }
-      },
-      {
-         "id": "asdf-asdf-asdf-asdf-1",
-         "timestamp": "2006-01-02T15:04:05Z",
-         "action": "push",
-         "target": {
-            "mediaType": "application/vnd.docker.container.image.rootfs.diff+x-gtar",
-            "length": 2,
-            "digest": "sha256:c3b3692957d439ac1928219a83fac91e7bf96c153725526874673ae1f2023f8d5",
-            "repository": "library/test",
-            "url": "http://example.com/v2/library/test/blobs/sha256:c3b3692957d439ac1928219a83fac91e7bf96c153725526874673ae1f2023f8d5"
-         },
-         "request": {
-            "id": "asdfasdf",
-            "addr": "client.local",
-            "host": "registrycluster.local",
-            "method": "PUT",
-            "useragent": "test/0.1"
-         },
-         "actor": {
-            "name": "test-actor"
-         },
-         "source": {
-            "addr": "hostname.local:port"
-         }
-      },
-      {
-         "id": "asdf-asdf-asdf-asdf-2",
-         "timestamp": "2006-01-02T15:04:05Z",
-         "action": "push",
-         "target": {
-            "mediaType": "application/vnd.docker.container.image.rootfs.diff+x-gtar",
-            "length": 3,
-            "digest": "sha256:c3b3692957d439ac1928219a83fac91e7bf96c153725526874673ae1f2023f8d5",
-            "repository": "library/test",
-            "url": "http://example.com/v2/library/test/blobs/sha256:c3b3692957d439ac1928219a83fac91e7bf96c153725526874673ae1f2023f8d5"
-         },
-         "request": {
-            "id": "asdfasdf",
-            "addr": "client.local",
-            "host": "registrycluster.local",
-            "method": "PUT",
-            "useragent": "test/0.1"
-         },
-         "actor": {
-            "name": "test-actor"
-         },
-         "source": {
-            "addr": "hostname.local:port"
-         }
-      }
-   ]
-}
-```
-
-## Responses
-
-The registry is fairly accepting of the response codes from endpoints. If an
-endpoint responds with any 2xx or 3xx response code (after following
-redirects), the message will be considered delivered and discarded.
-
-In turn, it is recommended that endpoints are accepting of incoming responses,
-as well. While the format of event envelopes are standardized by media type,
-any "pickyness" about validation may cause the queue to backup on the
-registry.
-
-## Monitoring
-
-The state of the endpoints are reported via the debug/vars http interface,
-usually configured to `http://localhost:5001/debug/vars`. Information such as
-configuration and metrics are available by endpoint.
-
-The following provides an example of a few endpoints that have experienced
-several failures and have since recovered:
-
-```json
-"notifications":{
-   "endpoints":[
-      {
-         "name":"local-5003",
-         "url":"http://localhost:5003/callback",
-         "Headers":{
-            "Authorization":[
-               "Bearer \u003can example token\u003e"
-            ]
-         },
-         "Timeout":1000000000,
-         "Threshold":10,
-         "Backoff":1000000000,
-         "Metrics":{
-            "Pending":76,
-            "Events":76,
-            "Successes":0,
-            "Failures":0,
-            "Errors":46,
-            "Statuses":{
-
-            }
-         }
-      },
-      {
-         "name":"local-8083",
-         "url":"http://localhost:8083/callback",
-         "Headers":null,
-         "Timeout":1000000000,
-         "Threshold":10,
-         "Backoff":1000000000,
-         "Metrics":{
-            "Pending":0,
-            "Events":76,
-            "Successes":76,
-            "Failures":0,
-            "Errors":28,
-            "Statuses":{
-               "202 Accepted":76
-            }
-         }
-      }
-   ]
-}
-```
-
-If using notification as part of a larger application, it is _critical_ to
-monitor the size ("Pending" above) of the endpoint queues. If failures or
-queue sizes are increasing, it can indicate a larger problem.
-
-The logs are also a valuable resource for monitoring problems. A failing
-endpoint will lead to messages similar to the following:
-
-```
-ERRO[0340] retryingsink: error writing events: httpSink{http://localhost:5003/callback}: error posting: Post http://localhost:5003/callback: dial tcp 127.0.0.1:5003: connection refused, retrying
-WARN[0340] httpSink{http://localhost:5003/callback} encountered too many errors, backing off
-```
-
-The above indicates that several errors have led to a backoff and the registry
-will wait before retrying.
-
-## Considerations
-
-Currently, the queues are inmemory, so endpoints should be _reasonably
-reliable_. They are designed to make a best-effort to send the messages but if
-an instance is lost, messages may be dropped. If an endpoint goes down, care
-should be taken to ensure that the registry instance is not terminated before
-the endpoint comes back up or messages will be lost.
-
-This can be mitigated by running endpoints in close proximity to the registry
-instances. One could run an endpoint that pages to disk and then forwards a
-request to provide better durability.
-
-The notification system is designed around a series of interchangeable _sinks_
-which can be wired up to achieve interesting behavior. If this system doesn't
-provide acceptable guarantees, adding a transactional `Sink` to the registry
-is a possibility, although it may have an effect on request service time.
-Please see the
-[godoc](http://godoc.org/github.com/docker/distribution/notifications#Sink)
-for more information.

docs/recipes/apache.md

@@ -1,215 +0,0 @@
-<!--[metadata]>
-+++
-title = "Authenticating proxy with apache"
-description = "Restricting access to your registry using an apache proxy"
-keywords = ["registry, on-prem, images, tags, repository, distribution, authentication, proxy, apache, httpd, TLS, recipe, advanced"]
-[menu.main]
-parent="smn_recipes"
-+++
-<![end-metadata]-->
-
-# Authenticating proxy with apache
-
-## Use-case
-
-People already relying on an apache proxy to authenticate their users to other services might want to leverage it and have Registry communications tunneled through the same pipeline.
-
-Usually, that includes enterprise setups using LDAP/AD on the backend and a SSO mechanism fronting their internal http portal.
-
-### Alternatives
-
-If you just want authentication for your registry, and are happy maintaining users access separately, you should really consider sticking with the native [basic auth registry feature](../deploying.md#native-basic-auth). 
-
-### Solution
-
-With the method presented here, you implement basic authentication for docker engines in a reverse proxy that sits in front of your registry.
-
-While we use a simple htpasswd file as an example, any other apache authentication backend should be fairly easy to implement once you are done with the example.
-
-We also implement push restriction (to a limited user group) for the sake of the example. Again, you should modify this to fit your mileage. 
-
-### Gotchas
-
-While this model gives you the ability to use whatever authentication backend you want through the secondary authentication mechanism implemented inside your proxy, it also requires that you move TLS termination from the Registry to the proxy itself.
-
-Furthermore, introducing an extra http layer in your communication pipeline will make it more complex to deploy, maintain, and debug, and will possibly create issues.
-
-## Setting things up
-
-Read again [the requirements](index.md#requirements).
-
-Ready?
-
-Run the following script:
-
-```
-mkdir -p auth
-mkdir -p data
-
-# This is the main apache configuration you will use
-cat <<EOF > auth/httpd.conf
-LoadModule headers_module modules/mod_headers.so
-
-LoadModule authn_file_module modules/mod_authn_file.so
-LoadModule authn_core_module modules/mod_authn_core.so
-LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
-LoadModule authz_user_module modules/mod_authz_user.so
-LoadModule authz_core_module modules/mod_authz_core.so
-LoadModule auth_basic_module modules/mod_auth_basic.so
-LoadModule access_compat_module modules/mod_access_compat.so
-
-LoadModule log_config_module modules/mod_log_config.so
-
-LoadModule ssl_module modules/mod_ssl.so
-
-LoadModule proxy_module modules/mod_proxy.so
-LoadModule proxy_http_module modules/mod_proxy_http.so
-
-LoadModule unixd_module modules/mod_unixd.so
-
-<IfModule ssl_module>
-    SSLRandomSeed startup builtin
-    SSLRandomSeed connect builtin
-</IfModule>
-
-<IfModule unixd_module>
-    User daemon
-    Group daemon
-</IfModule>
-
-ServerAdmin you@example.com
-
-ErrorLog /proc/self/fd/2
-
-LogLevel warn
-
-<IfModule log_config_module>
-    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
-    LogFormat "%h %l %u %t \"%r\" %>s %b" common
-
-    <IfModule logio_module>
-      LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
-    </IfModule>
-
-    CustomLog /proc/self/fd/1 common
-</IfModule>
-
-ServerRoot "/usr/local/apache2"
-
-Listen 5043
-
-<Directory />
-    AllowOverride none
-    Require all denied
-</Directory>
-
-<VirtualHost *:5043>
-
-  ServerName myregistrydomain.com
-
-  SSLEngine on
-  SSLCertificateFile /usr/local/apache2/conf/domain.crt
-  SSLCertificateKeyFile /usr/local/apache2/conf/domain.key
-
-  ## SSL settings recommandation from: https://raymii.org/s/tutorials/Strong_SSL_Security_On_Apache2.html
-  # Anti CRIME
-  SSLCompression off
-
-  # POODLE and other stuff
-  SSLProtocol all -SSLv2 -SSLv3 -TLSv1
-
-  # Secure cypher suites
-  SSLCipherSuite EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH
-  SSLHonorCipherOrder on
-
-  Header always set "Docker-Distribution-Api-Version" "registry/2.0"
-  Header onsuccess set "Docker-Distribution-Api-Version" "registry/2.0"
-  RequestHeader set X-Forwarded-Proto "https"
-
-  ProxyRequests     off
-  ProxyPreserveHost on
-
-  # no proxy for /error/ (Apache HTTPd errors messages)
-  ProxyPass /error/ !
-
-  ProxyPass        /v2 http://registry:5000/v2
-  ProxyPassReverse /v2 http://registry:5000/v2
-
-  <Location /v2>
-    Order deny,allow
-    Allow from all
-    AuthName "Registry Authentication"
-    AuthType basic
-    AuthUserFile "/usr/local/apache2/conf/httpd.htpasswd"
-    AuthGroupFile "/usr/local/apache2/conf/httpd.groups"
-
-    # Read access to authentified users
-    <Limit GET HEAD>
-      Require valid-user
-    </Limit>
-
-    # Write access to docker-deployer only
-    <Limit POST PUT DELETE PATCH>
-      Require group pusher
-    </Limit>
-
-  </Location>
-
-</VirtualHost>
-EOF
-
-# Now, create a password file for "testuser" and "testpassword"
-docker run --entrypoint htpasswd httpd:2.4 -Bbn testuser testpassword > auth/httpd.htpasswd
-# Create another one for "testuserpush" and "testpasswordpush"
-docker run --entrypoint htpasswd httpd:2.4 -Bbn testuserpush testpasswordpush >> auth/httpd.htpasswd
-
-# Create your group file
-echo "pusher: testuserpush" > auth/httpd.groups
-
-# Copy over your certificate files
-cp domain.crt auth
-cp domain.key auth
-
-# Now create your compose file
-
-cat <<EOF > docker-compose.yml
-apache:
-  image: "httpd:2.4"
-  hostname: myregistrydomain.com
-  ports:
-    - 5043:5043
-  links:
-    - registry:registry
-  volumes:
-    - `pwd`/auth:/usr/local/apache2/conf
-
-registry:
-  image: registry:2
-  ports:
-    - 127.0.0.1:5000:5000
-  volumes:
-    - `pwd`/data:/var/lib/registry
-
-EOF
-```
-
-## Starting and stopping
-
-Now, start your stack:
-
-    docker-compose up -d
-
-Login with a "push" authorized user (using `testuserpush` and `testpasswordpush`), then tag and push your first image: 
-
-    docker login myregistrydomain.com:5043
-    docker tag ubuntu myregistrydomain.com:5043/test
-    docker push myregistrydomain.com:5043/test
-
-Now, login with a "pull-only" user (using `testuser` and `testpassword`), then pull back the image:
-
-    docker login myregistrydomain.com:5043
-    docker pull myregistrydomain.com:5043/test
-
-Verify that the "pull-only" can NOT push:
-
-    docker push myregistrydomain.com:5043/test

docs/recipes/index.md

@@ -1,37 +0,0 @@
-<!--[metadata]>
-+++
-title = "Recipes Overview"
-description = "Fun stuff to do with your registry"
-keywords = ["registry, on-prem, images, tags, repository, distribution, recipes, advanced"]
-[menu.main]
-parent="smn_recipes"
-weight=-10
-+++
-<![end-metadata]-->
-
-# Recipes
-
-You will find here a list of "recipes", end-to-end scenarios for exotic or otherwise advanced use-cases.
-
-Most users are not expected to have a use for these.
-
-## Requirements
-
-You should have followed entirely the basic [deployment guide](../deploying.md).
-
-If you have not, please take the time to do so.
-
-At this point, it's assumed that:
-
- * you understand Docker security requirements, and how to configure your docker engines properly
- * you have installed Docker Compose
- * it's HIGHLY recommended that you get a certificate from a known CA instead of self-signed certificates
- * inside the current directory, you have a X509 `domain.crt` and `domain.key`, for the CN `myregistrydomain.com`
- * be sure you have stopped and removed any previously running registry (typically `docker stop registry && docker rm -v registry`)
-
-## The List
-
- * [using Apache as an authenticating proxy](apache.md)
- * [using Nginx as an authenticating proxy](nginx.md)
- * [running a Registry on OS X](osx-setup-guide.md)
- * [mirror the Docker Hub](mirror.md)

docs/recipes/menu.md

@@ -1,21 +0,0 @@
-<!--[metadata]>
-+++
-title = "Recipes"
-description = "Registry Recipes"
-keywords = ["registry, on-prem, images, tags, repository, distribution"]
-type = "menu"
-[menu.main]
-identifier="smn_recipes"
-parent="smn_registry"
-weight=6
-+++
-<![end-metadata]-->
-
-# Recipes
-
-## The List
-
- * [using Apache as an authenticating proxy](apache.md)
- * [using Nginx as an authenticating proxy](nginx.md)
- * [running a Registry on OS X](osx-setup-guide.md)
- * [mirror the Docker Hub](mirror.md)

docs/recipes/mirror.md

@@ -1,74 +0,0 @@
-<!--[metadata]>
-+++
-title = "Mirroring Docker Hub"
-description = "Setting-up a local mirror for Docker Hub images"
-keywords = ["registry, on-prem, images, tags, repository, distribution, mirror, Hub, recipe, advanced"]
-[menu.main]
-parent="smn_recipes"
-+++
-<![end-metadata]-->
-
-# Registry as a pull through cache
-
-## Use-case
-
-If you have multiple instances of Docker running in your environment (e.g., multiple physical or virtual machines, all running the Docker daemon), each time one of them requires an image that it doesn’t have it will go out to the internet and fetch it from the public Docker registry. By running a local registry mirror, you can keep most of the redundant image fetch traffic on your local network.
-
-### Alternatives
-
-Alternatively, if the set of images you are using is well delimited, you can simply pull them manually and push them to a simple, local, private registry.
-
-Furthermore, if your images are all built in-house, not using the Hub at all and relying entirely on your local registry is the simplest scenario.
-
-### Gotcha
-
-It's currently not possible to mirror another private registry. Only the central Hub can be mirrored.
-
-### Solution
-
-The Registry can be configured as a pull through cache.  In this mode a Registry responds to all normal docker pull requests but stores all content locally.
-
-## How does it work?
-
-The first time you request an image from your local registry mirror, it pulls the image from the public Docker registry and stores it locally before handing it back to you. On subsequent requests, the local registry mirror is able to serve the image from its own storage.
-
-### What if the content changes on the Hub?
-
-When a pull is attempted with a tag, the Registry will check the remote to ensure if it has the latest version of the requested content.  If it doesn't it will fetch the latest content and cache it.
-
-### What about my disk?
-
-In environments with high churn rates, stale data can build up in the cache.  When running as a pull through cache the Registry will periodically remove old content to save disk space. Subsequent requests for removed content will cause a remote fetch and local re-caching.
-
-To ensure best performance and guarantee correctness the Registry cache should be configured to use the `filesystem` driver for storage.
-
-## Running a Registry as a pull through cache
-
-The easiest way to run a registry as a pull through cache is to run the official Registry image.
-
-Multiple registry caches can be deployed over the same back-end.  A single registry cache will ensure that concurrent requests do not pull duplicate data, but this property will not hold true for a registry cache cluster.
-
-### Configuring the cache
-
-To configure a Registry to run as a pull through cache, the addition of a `proxy` section is required to the config file.
-
-In order to access private images on the Docker Hub, a username and password can be supplied.
-
-    proxy:
-      remoteurl: https://registry-1.docker.io
-      username: [username]
-      password: [password]
-
-> :warn: if you specify a username and password, it's very important to understand that private resources that this user has access to on the Hub will be made available on your mirror. It's thus paramount that you secure your mirror by implementing authentication if you expect these resources to stay private!
-
-### Configuring the Docker daemon
-
-You will need to pass the `--registry-mirror` option to your Docker daemon on startup:
-
-    docker --registry-mirror=https://<my-docker-mirror-host> daemon
-
-For example, if your mirror is serving on http://10.0.0.2:5000, you would run:
-
-    docker --registry-mirror=https://10.0.0.2:5000 daemon
-
-NOTE: Depending on your local host setup, you may be able to add the `--registry-mirror` option to the `DOCKER_OPTS` variable in `/etc/default/docker`.

docs/recipes/nginx.md

@@ -1,190 +0,0 @@
-<!--[metadata]>
-+++
-title = "Authenticating proxy with nginx"
-description = "Restricting access to your registry using a nginx proxy"
-keywords = ["registry, on-prem, images, tags, repository, distribution, nginx, proxy, authentication, TLS, recipe, advanced"]
-[menu.main]
-parent="smn_recipes"
-+++
-<![end-metadata]-->
-
-# Authenticating proxy with nginx
-
-
-## Use-case
-
-People already relying on a nginx proxy to authenticate their users to other services might want to leverage it and have Registry communications tunneled through the same pipeline.
-
-Usually, that includes enterprise setups using LDAP/AD on the backend and a SSO mechanism fronting their internal http portal.
-
-### Alternatives
-
-If you just want authentication for your registry, and are happy maintaining users access separately, you should really consider sticking with the native [basic auth registry feature](../deploying.md#native-basic-auth).
-
-### Solution
-
-With the method presented here, you implement basic authentication for docker engines in a reverse proxy that sits in front of your registry.
-
-While we use a simple htpasswd file as an example, any other nginx authentication backend should be fairly easy to implement once you are done with the example.
-
-We also implement push restriction (to a limited user group) for the sake of the example. Again, you should modify this to fit your mileage.
-
-### Gotchas
-
-While this model gives you the ability to use whatever authentication backend you want through the secondary authentication mechanism implemented inside your proxy, it also requires that you move TLS termination from the Registry to the proxy itself.
-
-Furthermore, introducing an extra http layer in your communication pipeline will make it more complex to deploy, maintain, and debug, and will possibly create issues. Make sure the extra complexity is required.
-
-For instance, Amazon's Elastic Load Balancer (ELB) in HTTPS mode already sets the following client header:
-
-```
-X-Real-IP
-X-Forwarded-For
-X-Forwarded-Proto
-```
-
-So if you have an nginx sitting behind it, should remove these lines from the example config below:
-
-```
-X-Real-IP         $remote_addr; # pass on real client's IP
-X-Forwarded-For   $proxy_add_x_forwarded_for;
-X-Forwarded-Proto $scheme;
-```
-
-Otherwise nginx will reset the ELB's values, and the requests will not be routed properly. For more information, see [#970](https://github.com/docker/distribution/issues/970).
-
-## Setting things up
-
-Read again [the requirements](index.md#requirements).
-
-Ready?
-
---
-
-Create the required directories
-
-```
-mkdir -p auth
-mkdir -p data
-```
-
-Create the main nginx configuration you will use.
-
-```
-
-cat <<EOF > auth/nginx.conf
-events {
-    worker_connections  1024;
-}
-
-http {
-
-  upstream docker-registry {
-    server registry:5000;
-  }
-
-  ## Set a variable to help us decide if we need to add the
-  ## 'Docker-Distribution-Api-Version' header.
-  ## The registry always sets this header.
-  ## In the case of nginx performing auth, the header will be unset
-  ## since nginx is auth-ing before proxying.
-  map \$upstream_http_docker_distribution_api_version \$docker_distribution_api_version {
-    'registry/2.0' '';
-    default registry/2.0;
-  }
-
-  server {
-    listen 443 ssl;
-    server_name myregistrydomain.com;
-
-    # SSL
-    ssl_certificate /etc/nginx/conf.d/domain.crt;
-    ssl_certificate_key /etc/nginx/conf.d/domain.key;
-
-    # Recommendations from https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
-    ssl_protocols TLSv1.1 TLSv1.2;
-    ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
-    ssl_prefer_server_ciphers on;
-    ssl_session_cache shared:SSL:10m;
-
-    # disable any limits to avoid HTTP 413 for large image uploads
-    client_max_body_size 0;
-
-    # required to avoid HTTP 411: see Issue #1486 (https://github.com/docker/docker/issues/1486)
-    chunked_transfer_encoding on;
-
-    location /v2/ {
-      # Do not allow connections from docker 1.5 and earlier
-      # docker pre-1.6.0 did not properly set the user agent on ping, catch "Go *" user agents
-      if (\$http_user_agent ~ "^(docker\/1\.(3|4|5(?!\.[0-9]-dev))|Go ).*\$" ) {
-        return 404;
-      }
-
-      # To add basic authentication to v2 use auth_basic setting.
-      auth_basic "Registry realm";
-      auth_basic_user_file /etc/nginx/conf.d/nginx.htpasswd;
-
-      ## If $docker_distribution_api_version is empty, the header will not be added.
-      ## See the map directive above where this variable is defined.
-      add_header 'Docker-Distribution-Api-Version' \$docker_distribution_api_version always;
-
-      proxy_pass                          http://docker-registry;
-      proxy_set_header  Host              \$http_host;   # required for docker client's sake
-      proxy_set_header  X-Real-IP         \$remote_addr; # pass on real client's IP
-      proxy_set_header  X-Forwarded-For   \$proxy_add_x_forwarded_for;
-      proxy_set_header  X-Forwarded-Proto \$scheme;
-      proxy_read_timeout                  900;
-    }
-  }
-}
-EOF
-```
-
-Now create a password file for "testuser" and "testpassword"
-
-```
-docker run --rm --entrypoint htpasswd registry:2 -bn testuser testpassword > auth/nginx.htpasswd
-```
-
-Copy over your certificate files
-
-```
-cp domain.crt auth
-cp domain.key auth
-```
-
-Now create your compose file
-
-```
-cat <<EOF > docker-compose.yml
-nginx:
-  image: "nginx:1.9"
-  ports:
-    - 5043:443
-  links:
-    - registry:registry
-  volumes:
-    - ./auth:/etc/nginx/conf.d
-    - ./auth/nginx.conf:/etc/nginx/nginx.conf:ro
-
-registry:
-  image: registry:2
-  ports:
-    - 127.0.0.1:5000:5000
-  volumes:
-    - `pwd`./data:/var/lib/registry
-EOF
-```
-
-## Starting and stopping
-
-Now, start your stack:
-
-    docker-compose up -d
-
-Login with a "push" authorized user (using `testuser` and `testpassword`), then tag and push your first image:
-
-    docker login -u=testuser -p=testpassword -e=root@example.ch myregistrydomain.com:5043
-    docker tag ubuntu myregistrydomain.com:5043/test
-    docker push myregistrydomain.com:5043/test
-    docker pull myregistrydomain.com:5043/test

docs/recipes/osx-setup-guide.md

@@ -1,81 +0,0 @@
-<!--[metadata]>
-+++
-title = "Running on OS X"
-description = "Explains how to run a registry on OS X"
-keywords = ["registry, on-prem, images, tags, repository, distribution, OS X, recipe, advanced"]
-[menu.main]
-parent="smn_recipes"
-+++
-<![end-metadata]-->
-
-# OS X Setup Guide
-
-## Use-case
-
-This is useful if you intend to run a registry server natively on OS X.
-
-### Alternatives
-
-You can start a VM on OS X, and deploy your registry normally as a container using Docker inside that VM.
-
-The simplest road to get there is traditionally to use the [docker Toolbox](https://www.docker.com/toolbox), or [docker-machine](/machine/index.md), which usually relies on the [boot2docker](http://boot2docker.io/) iso inside a VirtualBox VM.
-
-### Solution
-
-Using the method described here, you install and compile your own from the git repository and run it as an OS X agent.
-
-### Gotchas
-
-Production services operation on OS X is out of scope of this document. Be sure you understand well these aspects before considering going to production with this.
-
-## Setup golang on your machine
-
-If you know, safely skip to the next section.
-
-If you don't, the TLDR is:
-
-    bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer)
-    source ~/.gvm/scripts/gvm
-    gvm install go1.4.2
-    gvm use go1.4.2
-
-If you want to understand, you should read [How to Write Go Code](https://golang.org/doc/code.html).
-
-## Checkout the Docker Distribution source tree
-
-    mkdir -p $GOPATH/src/github.com/docker
-    git clone https://github.com/docker/distribution.git $GOPATH/src/github.com/docker/distribution
-    cd $GOPATH/src/github.com/docker/distribution
-
-## Build the binary
-
-    GOPATH=$(PWD)/Godeps/_workspace:$GOPATH make binaries
-    sudo cp bin/registry /usr/local/libexec/registry
-
-## Setup
-
-Copy the registry configuration file in place:
-
-    mkdir /Users/Shared/Registry
-    cp docs/osx/config.yml /Users/Shared/Registry/config.yml
-
-## Running the Docker Registry under launchd
-
-Copy the Docker registry plist into place:
-
-    plutil -lint docs/osx/com.docker.registry.plist
-    cp docs/osx/com.docker.registry.plist ~/Library/LaunchAgents/
-    chmod 644 ~/Library/LaunchAgents/com.docker.registry.plist
-
-Start the Docker registry:
-
-    launchctl load ~/Library/LaunchAgents/com.docker.registry.plist
-
-### Restarting the docker registry service
-
-    launchctl stop com.docker.registry
-    launchctl start com.docker.registry
-
-### Unloading the docker registry service
-
-    launchctl unload ~/Library/LaunchAgents/com.docker.registry.plist

docs/recipes/osx/com.docker.registry.plist

@@ -1,42 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>Label</key>
-	<string>com.docker.registry</string>
-	<key>KeepAlive</key>
-	<true/>
-	<key>StandardErrorPath</key>
-	<string>/Users/Shared/Registry/registry.log</string>
-	<key>StandardOutPath</key>
-	<string>/Users/Shared/Registry/registry.log</string>
-	<key>Program</key>
-	<string>/usr/local/libexec/registry</string>
-	<key>ProgramArguments</key>
-	<array>
-		<string>/usr/local/libexec/registry</string>
-		<string>/Users/Shared/Registry/config.yml</string>
-	</array>
-	<key>Sockets</key>
-	<dict>
-		<key>http-listen-address</key>
-		<dict>
-			<key>SockServiceName</key>
-			<string>5000</string>
-			<key>SockType</key>
-			<string>dgram</string>
-			<key>SockFamily</key>
-			<string>IPv4</string>
-		</dict>
-		<key>http-debug-address</key>
-		<dict>
-			<key>SockServiceName</key>
-			<string>5001</string>
-			<key>SockType</key>
-			<string>dgram</string>
-			<key>SockFamily</key>
-			<string>IPv4</string>
-		</dict>
-	</dict>
-</dict>
-</plist>

docs/recipes/osx/config.yml

@@ -1,16 +0,0 @@
-version: 0.1
-log:
-  level: info
-  fields:
-    service: registry
-    environment: macbook-air
-storage:
-    cache:
-        blobdescriptor: inmemory
-    filesystem:
-        rootdirectory: /Users/Shared/Registry
-http:
-    addr: 0.0.0.0:5000
-    secret: mytokensecret 
-    debug:
-        addr: localhost:5001

docs/spec/api.md

@@ -1,14 +1,8 @@
-<!--[metadata]>
-+++
-title = "HTTP API V2"
-description = "Specification for the Registry API."
-keywords = ["registry, on-prem, images, tags, repository, distribution, api, advanced"]
-[menu.main]
-parent="smn_registry_ref"
-+++
-<![end-metadata]-->
-
-# Docker Registry HTTP API V2
+---
+title: "Docker Registry HTTP API V2"
+description: "Specification for the Registry API."
+keywords: "registry, on-prem, images, tags, repository, distribution, api, advanced"
+---
 
 ## Introduction
 
@@ -4846,8 +4840,3 @@ The following headers will be returned with the response:
 |----|-----------|
 |`Content-Length`|Length of the JSON response body.|
 |`Link`|RFC5988 compliant rel='next' with URL to next result set, if available|
-
-
-
-
-

docs/spec/api.md.tmpl

@@ -1,14 +1,8 @@
-<!--[metadata]>
-+++
-title = "HTTP API V2"
-description = "Specification for the Registry API."
-keywords = ["registry, on-prem, images, tags, repository, distribution, api, advanced"]
-[menu.main]
-parent="smn_registry_ref"
-+++
-<![end-metadata]-->
-
-# Docker Registry HTTP API V2
+---
+title: "Docker Registry HTTP API V2"
+description: "Specification for the Registry API."
+keywords: "registry, on-prem, images, tags, repository, distribution, api, advanced"
+---
 
 ## Introduction
 

docs/spec/auth/index.md

@@ -1,15 +1,8 @@
-<!--[metadata]>
-+++
-title = "Docker Registry Token Authentication"
-description = "Docker Registry v2 authentication schema"
-keywords = ["registry, on-prem, images, tags, repository, distribution, authentication, advanced"]
-[menu.main]
-parent="smn_registry_ref"
-weight=100
-+++
-<![end-metadata]-->
-
-# Docker Registry v2 authentication
+---
+title: "Docker Registry v2 authentication"
+description: "Docker Registry v2 authentication schema"
+keywords: "registry, on-prem, images, tags, repository, distribution, authentication, advanced"
+---
 
 See the [Token Authentication Specification](token.md),
 [Token Authentication Implementation](jwt.md),

docs/spec/auth/jwt.md

@@ -1,15 +1,8 @@
-<!--[metadata]>
-+++
-title = "Token Authentication Implementation"
-description = "Describe the reference implementation of the Docker Registry v2 authentication schema"
-keywords = ["registry, on-prem, images, tags, repository, distribution, JWT authentication, advanced"]
-[menu.main]
-parent="smn_registry_ref"
-weight=101
-+++
-<![end-metadata]-->
-
-# Docker Registry v2 Bearer token specification
+---
+title: "Docker Registry v2 Bearer token specification"
+description: "Describe the reference implementation of the Docker Registry v2 authentication schema"
+keywords: "registry, on-prem, images, tags, repository, distribution, JWT authentication, advanced"
+---
 
 This specification covers the `docker/distribution` implementation of the
 v2 Registry's authentication schema.  Specifically, it describes the JSON

docs/spec/auth/oauth.md

@@ -1,15 +1,8 @@
-<!--[metadata]>
-+++
-title = "Oauth2 Token Authentication"
-description = "Specifies the Docker Registry v2 authentication"
-keywords = ["registry, on-prem, images, tags, repository, distribution, oauth2, advanced"]
-[menu.main]
-parent="smn_registry_ref"
-weight=102
-+++
-<![end-metadata]-->
-
-# Docker Registry v2 authentication using OAuth2
+---
+title: "Docker Registry v2 authentication using OAuth2"
+description: "Specifies the Docker Registry v2 authentication"
+keywords: "registry, on-prem, images, tags, repository, distribution, oauth2, advanced"
+---
 
 This document describes support for the OAuth2 protocol within the authorization
 server. [RFC6749](https://tools.ietf.org/html/rfc6749) should be used as a
@@ -188,4 +181,3 @@ Content-Type: application/json
 
 {"refresh_token":"kas9Da81Dfa8","access_token":"eyJhbGciOiJFUzI1NiIsInR5":"expires_in":900,"scope":"repository:samalba/my-app:pull,repository:samalba/my-app:push"}
 ```
-

docs/spec/auth/scope.md

@@ -1,15 +1,8 @@
-<!--[metadata]>
-+++
-title = "Token Scope Documentation"
-description = "Describes the scope and access fields used for registry authorization tokens"
-keywords = ["registry, on-prem, images, tags, repository, distribution, advanced, access, scope"]
-[menu.main]
-parent="smn_registry_ref"
-weight=103
-+++
-<![end-metadata]-->
-
-# Docker Registry Token Scope and Access
+---
+title: "Docker Registry Token Scope and Access"
+description: "Describes the scope and access fields used for registry authorization tokens"
+keywords: "registry, on-prem, images, tags, repository, distribution, advanced, access, scope"
+---
 
 Tokens used by the registry are always restricted what resources they may
 be used to access, where those resources may be accessed, and what actions
@@ -140,4 +133,3 @@ done by fetching an access token using the refresh token. Since the refresh
 token is not scoped to specific resources for an audience, extra care should
 be taken to only use the refresh token to negotiate new access tokens directly
 with the authorization server, and never with a resource provider.
-

docs/spec/auth/token.md

@@ -1,15 +1,8 @@
-<!--[metadata]>
-+++
-title = "Token Authentication Specification"
-description = "Specifies the Docker Registry v2 authentication"
-keywords = ["registry, on-prem, images, tags, repository, distribution, Bearer authentication, advanced"]
-[menu.main]
-parent="smn_registry_ref"
-weight=104
-+++
-<![end-metadata]-->
-
-# Docker Registry v2 authentication via central service
+---
+title: "Docker Registry v2 authentication via central service"
+description: "Specifies the Docker Registry v2 authentication"
+keywords: "registry, on-prem, images, tags, repository, distribution, Bearer authentication, advanced"
+---
 
 This document outlines the v2 Docker registry authentication scheme:
 
@@ -25,7 +18,7 @@ This document outlines the v2 Docker registry authentication scheme:
 5. The client retries the original request with the Bearer token embedded in
    the request's Authorization header.
 6. The Registry authorizes the client by validating the Bearer token and the
-   claim set embedded within it and begins the push/pull session as usual. 
+   claim set embedded within it and begins the push/pull session as usual.
 
 ## Requirements
 
@@ -161,7 +154,7 @@ Defines getting a bearer and refresh token using the token endpoint.
         <code>expires_in</code>
     </dt>
     <dd>
-        (Optional) The duration in seconds since the token was issued that it 
+        (Optional) The duration in seconds since the token was issued that it
         will remain valid.  When omitted, this defaults to 60 seconds.  For
         compatibility with older clients, a token should never be returned with
         less than 60 seconds to live.

docs/spec/implementations.md

@@ -1,10 +1,7 @@
-<!--[metadata]>
-+++
-draft = true
-+++
-<![end-metadata]-->
-
-# Distribution API Implementations
+---
+published: false
+title: Distribution API Implementations
+---
 
 This is a list of known implementations of the Distribution API spec.
 
@@ -29,4 +26,3 @@ _Known Issues_
  - No resumable push support
  - No PATCH implementation for blob upload
  - Content ranges ignored
-

docs/spec/index.md

@@ -1,15 +1,8 @@
-<!--[metadata]>
-+++
-title = "Reference Overview"
-description = "Explains registry JSON objects"
-keywords = ["registry, service, images, repository,  json"]
-[menu.main]
-parent="smn_registry_ref"
-weight=-1
-+++
-<![end-metadata]-->
-
-# Docker Registry Reference
+---
+title: "Docker Registry Reference"
+description: "Explains registry JSON objects"
+keywords: "registry, service, images, repository, json"
+---
 
 * [HTTP API V2](api.md)
 * [Storage Driver](../storage-drivers/index.md)

docs/spec/json.md

@@ -1,17 +1,9 @@
-<!--[metadata]>
-+++
-draft=true
-title = "Docker Distribution JSON Canonicalization"
-description = "Explains registry JSON objects"
-keywords = ["registry, service, images, repository,  json"]
-[menu.main]
-parent="smn_registry_ref"
-+++
-<![end-metadata]-->
-
-
-
-# Docker Distribution JSON Canonicalization
+---
+published: false
+title: "Docker Distribution JSON Canonicalization"
+description: "Explains registry JSON objects"
+keywords: "registry, service, images, repository, json"
+---
 
 To provide consistent content hashing of JSON objects throughout Docker
 Distribution APIs, the specification defines a canonical JSON format. Adopting

docs/spec/manifest-v2-1.md

@@ -1,14 +1,8 @@
-<!--[metadata]>
-+++
-title = "Image Manifest V 2, Schema 1 "
-description = "image manifest for the Registry."
-keywords = ["registry, on-prem, images, tags, repository, distribution, api, advanced, manifest"]
-[menu.main]
-parent="smn_registry_ref"
-+++
-<![end-metadata]-->
-
-# Image Manifest Version 2, Schema 1
+---
+title: "Image Manifest V 2, Schema 1 "
+description: "image manifest for the Registry."
+keywords: "registry, on-prem, images, tags, repository, distribution, api, advanced, manifest"
+---
 
 This document outlines the format of of the V2 image manifest. The image
 manifest described herein was introduced in the Docker daemon in the [v1.3.0

docs/spec/manifest-v2-2.md

@@ -1,14 +1,8 @@
-<!--[metadata]>
-+++
-title = "Image Manifest V 2, Schema 2 "
-description = "image manifest for the Registry."
-keywords = ["registry, on-prem, images, tags, repository, distribution, api, advanced, manifest"]
-[menu.main]
-parent="smn_registry_ref"
-+++
-<![end-metadata]-->
-
-# Image Manifest Version 2, Schema 2
+---
+title: "Image Manifest V 2, Schema 2 "
+description: "image manifest for the Registry."
+keywords: "registry, on-prem, images, tags, repository, distribution, api, advanced, manifest"
+---
 
 This document outlines the format of of the V2 image manifest, schema version 2.
 The original (and provisional) image manifest for V2 (schema 1), was introduced

docs/spec/menu.md

@@ -1,13 +0,0 @@
-<!--[metadata]>
-+++
-title = "Reference"
-description = "Explains registry JSON objects"
-keywords = ["registry, service, images, repository,  json"]
-type = "menu"
-[menu.main]
-identifier="smn_registry_ref"
-parent="smn_registry"
-weight=7
-+++
-<![end-metadata]-->
-

docs/storage-drivers/azure.md

@@ -1,78 +0,0 @@
-<!--[metadata]>
-+++
-title = "Microsoft Azure storage driver"
-description = "Explains how to use the Azure storage drivers"
-keywords = ["registry, service, driver, images, storage,  azure"]
-[menu.main]
-parent = "smn_storagedrivers"
-+++
-<![end-metadata]-->
-
-
-# Microsoft Azure storage driver
-
-An implementation of the `storagedriver.StorageDriver` interface which uses [Microsoft Azure Blob Storage](http://azure.microsoft.com/en-us/services/storage/) for object storage.
-
-## Parameters
-
-<table>
-  <tr>
-    <th>Parameter</th>
-    <th>Required</th>
-    <th>Description</th>
-  </tr>
-  <tr>
-    <td>
-      <code>accountname</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      Name of the Azure Storage Account.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>accountkey</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      Primary or Secondary Key for the Storage Account.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>container</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      Name of the Azure root storage container in which all registry data will be stored. Must comply the storage container name [requirements][create-container-api].
-    </td>
-  </tr>
-   <tr>
-    <td>
-      <code>realm</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Domain name suffix for the Storage Service API endpoint. For example realm for "Azure in China" would be `core.chinacloudapi.cn` and realm for "Azure Government" would be `core.usgovcloudapi.net`. By default, this
-      is <code>core.windows.net</code>.
-    </td>
-  </tr>
-
-</table>
-
-
-## Related Information
-
-* To get information about
-[azure-blob-storage](http://azure.microsoft.com/en-us/services/storage/) visit
-the Microsoft website.
-* You can use Microsoft's [Blob Service REST API](https://msdn.microsoft.com/en-us/library/azure/dd135733.aspx) to [create a container] (https://msdn.microsoft.com/en-us/library/azure/dd179468.aspx).

docs/storage-drivers/filesystem.md

@@ -1,24 +0,0 @@
-<!--[metadata]>
-+++
-title = "Filesystem storage driver"
-description = "Explains how to use the filesystem storage drivers"
-keywords = ["registry, service, driver, images, storage,  filesystem"]
-[menu.main]
-parent="smn_storagedrivers"
-+++
-<![end-metadata]-->
-
-
-# Filesystem storage driver
-
-An implementation of the `storagedriver.StorageDriver` interface which uses the local filesystem.
-
-## Parameters
-
-`rootdirectory`: (optional) The absolute path to a root directory tree in which
-to store all registry files. The registry stores all its data here so make sure
-there is adequate space available. Defaults to `/var/lib/registry`.
-`maxthreads`: (optional) The maximum number of simultaneous blocking filesystem
-operations permitted within the registry. Each operation spawns a new thread and
-may cause thread exhaustion issues if many are done in parallel. Defaults to
-`100`, and can be no lower than `25`.

docs/storage-drivers/gcs.md

@@ -1,78 +0,0 @@
-<!--[metadata]>
-+++
-title = "GCS storage driver"
-description = "Explains how to use the Google Cloud Storage drivers"
-keywords = ["registry, service, driver, images, storage,  gcs, google, cloud"]
-[menu.main]
-parent="smn_storagedrivers"
-+++
-<![end-metadata]-->
-
-
-# Google Cloud Storage driver
-
-An implementation of the `storagedriver.StorageDriver` interface which uses Google Cloud for object storage.
-
-## Parameters
-
-
-<table>
-  <tr>
-    <th>Parameter</th>
-    <th>Required</th>
-    <th>Description</th>
-  </tr>
-  <tr>
-    <td>
-      <code>bucket</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      Storage bucket name.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>keyfile</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      A private service account key file in JSON format. Instead of a key file <a href="https://developers.google.com/identity/protocols/application-default-credentials">Google Application Default Credentials</a> can be used.
-    </td>
-  </tr>
-   <tr>
-    <td>
-      <code>rootdirectory</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      This is a prefix that will be applied to all Google Cloud Storage keys to allow you to segment data in your bucket if necessary.
-  </tr>
-  </tr>
-   <tr>
-    <td>
-      <code>chunksize</code>
-    </td>
-    <td>
-      no (default 5242880)
-    </td>
-    <td>
-      This is the chunk size used for uploading large blobs, must be a multiple of 256*1024.
-  </tr>
-
-</table>
-
-
-`bucket`: The name of your Google Cloud Storage bucket where you wish to store objects (needs to already be created prior to driver initialization).
-
-`keyfile`: (optional) A private key file in JSON format, used for [Service Account Authentication](https://cloud.google.com/storage/docs/authentication#service_accounts).
-
-**Note** Instead of a key file you can use [Google Application Default Credentials](https://developers.google.com/identity/protocols/application-default-credentials).
-
-`rootdirectory`: (optional) The root directory tree in which all registry files will be stored. Defaults to the empty string (bucket root).

docs/storage-drivers/index.md

@@ -1,66 +0,0 @@
-<!--[metadata]>
-+++
-title = "Storage Driver overview"
-description = "Explains how to use storage drivers"
-keywords = ["registry, on-prem, images, tags, repository, distribution, storage drivers, advanced"]
-aliases = ["/registry/storagedrivers/"]
-[menu.main]
-parent="smn_storagedrivers"
-identifier="storage_index"
-weight=-1
-+++
-<![end-metadata]-->
-
-
-# Docker Registry Storage Driver
-
-This document describes the registry storage driver model, implementation, and explains how to contribute new storage drivers.
-
-## Provided Drivers
-
-This storage driver package comes bundled with several drivers:
-
-- [inmemory](inmemory.md): A temporary storage driver using a local inmemory map. This exists solely for reference and testing.
-- [filesystem](filesystem.md): A local storage driver configured to use a directory tree in the local filesystem.
-- [s3](s3.md): A driver storing objects in an Amazon Simple Storage Solution (S3) bucket.
-- [azure](azure.md): A driver storing objects in [Microsoft Azure Blob Storage](http://azure.microsoft.com/en-us/services/storage/).
-- [swift](swift.md): A driver storing objects in [Openstack Swift](http://docs.openstack.org/developer/swift/).
-- [oss](oss.md): A driver storing objects in [Aliyun OSS](http://www.aliyun.com/product/oss).
-- [gcs](gcs.md): A driver storing objects in a [Google Cloud Storage](https://cloud.google.com/storage/) bucket.
-
-## Storage Driver API
-
-The storage driver API is designed to model a filesystem-like key/value storage in a manner abstract enough to support a range of drivers from the local filesystem to Amazon S3 or other distributed object storage systems.
-
-Storage drivers are required to implement the `storagedriver.StorageDriver` interface provided in `storagedriver.go`, which includes methods for reading, writing, and deleting content, as well as listing child objects of a specified prefix key.
-
-Storage drivers are intended to be written in Go, providing compile-time
-validation of the `storagedriver.StorageDriver` interface.
-
-## Driver Selection and Configuration
-
-The preferred method of selecting a storage driver is using the `StorageDriverFactory` interface in the `storagedriver/factory` package. These factories provide a common interface for constructing storage drivers with a parameters map. The factory model is based off of the [Register](http://golang.org/pkg/database/sql/#Register) and [Open](http://golang.org/pkg/database/sql/#Open) methods in the builtin [database/sql](http://golang.org/pkg/database/sql) package.
-
-Storage driver factories may be registered by name using the
-`factory.Register` method, and then later invoked by calling `factory.Create`
-with a driver name and parameters map. If no such storage driver can be found,
-`factory.Create` will return an `InvalidStorageDriverError`.
-
-## Driver Contribution
-
-### Writing new storage drivers
-
-To create a valid storage driver, one must implement the
-`storagedriver.StorageDriver` interface and make sure to expose this driver
-via the factory system.
-
-#### Registering
-
-Storage drivers should call `factory.Register` with their driver name in an `init` method, allowing callers of `factory.New` to construct instances of this driver without requiring modification of imports throughout the codebase.
-
-## Testing
-
-Storage driver test suites are provided in
-`storagedriver/testsuites/testsuites.go` and may be used for any storage
-driver written in Go. Tests can be registered using the `RegisterSuite`
-function, which run the same set of tests for any registered drivers.

docs/storage-drivers/inmemory.md

@@ -1,23 +0,0 @@
-<!--[metadata]>
-+++
-title = "In-memory storage driver"
-description = "Explains how to use the in-memory storage drivers"
-keywords = ["registry, service, driver, images, storage,  in-memory"]
-[menu.main]
-parent="smn_storagedrivers"
-+++
-<![end-metadata]-->
-
-
-# In-memory storage driver (Testing Only)
-
-For purely tests purposes, you can use the `inmemory` storage driver. This
-driver is an implementation of the `storagedriver.StorageDriver` interface which
-uses local memory for object storage. If you would like to run a registry from
-volatile memory, use the [`filesystem` driver](filesystem.md) on a ramdisk.
-
-**IMPORTANT**: This storage driver *does not* persist data across runs. This is why it is only suitable for testing. *Never* use this driver in production.
-
-## Parameters
-
-None

docs/storage-drivers/menu.md

@@ -1,13 +0,0 @@
-<!--[metadata]>
-+++
-title = "Storage Drivers"
-description = "Storage Drivers"
-keywords = ["registry, on-prem, images, tags, repository, distribution"]
-type = "menu"
-[menu.main]
-identifier="smn_storagedrivers"
-parent="smn_registry"
-weight=7
-+++
-<![end-metadata]-->
-

docs/storage-drivers/oss.md

@@ -1,126 +0,0 @@
-<!--[metadata]>
-+++
-title = "Aliyun OSS storage driver"
-description = "Explains how to use the Aliyun OSS storage driver"
-keywords = ["registry, service, driver, images, storage, OSS, aliyun"]
-[menu.main]
-parent="smn_storagedrivers"
-+++
-<![end-metadata]-->
-
-# Aliyun OSS storage driver
-
-An implementation of the `storagedriver.StorageDriver` interface which uses [Aliyun OSS](http://www.aliyun.com/product/oss) for object storage.
-
-## Parameters
-
-<table>
-  <tr>
-    <th>Parameter</th>
-    <th>Required</th>
-    <th>Description</th>
-  </tr>
-<tr>
-  <td>
-    <code>accesskeyid</code>
-</td>
-<td>
-yes
-</td>
-<td>
-Your access key ID.
-</td>
-</tr>
-<tr>
-  <td>
-    <code>accesskeysecret</code>
-</td>
-<td>
-yes
-</td>
-<td>
-Your access key secret.
-</td>
-</tr>
-<tr>
-  <td>
-    <code>region</code>
-</td>
-<td>
-yes
-</td>
-<td> The name of the OSS region in which you would like to store objects (for example `oss-cn-beijing`). For a list of regions, you can look at <http://docs.aliyun.com/#/oss/product-documentation/domain-region>
-</td>
-</tr>
-<tr>
-  <td>
-    <code>endpoint</code>
-</td>
-<td>
-no
-</td>
-<td>
-An endpoint which defaults to `<bucket>.<region>.aliyuncs.com` or `<bucket>.<region>-internal.aliyuncs.com` (when `internal=true`). You can change the default endpoint by changing this value.
-</td>
-</tr>
-<tr>
-  <td>
-    <code>internal</code>
-</td>
-<td>
-no
-</td>
-<td> An internal endpoint or the public endpoint for OSS access. The default is false. For a list of regions, you can look at <http://docs.aliyun.com/#/oss/product-documentation/domain-region>
-</td>
-</tr>
-<tr>
-  <td>
-    <code>bucket</code>
-</td>
-<td>
-yes
-</td>
-<td> The name of your OSS bucket where you wish to store objects (needs to already be created prior to driver initialization).
-</td>
-</tr>
-<tr>
-  <td>
-    <code>encrypt</code>
-</td>
-<td>
-no
-</td>
-<td> Specifies whether you would like your data encrypted on the server side. Defaults to false if not specified.
-</td>
-</tr>
-<tr>
-  <td>
-    <code>secure</code>
-</td>
-<td>
-no
-</td>
-<td> Specifies whether to transfer data to the bucket over ssl or not. If you omit this value, `true` is used.
-</td>
-</tr>
-<tr>
-  <td>
-    <code>chunksize</code>
-</td>
-<td>
-no
-</td>
-<td> The default part size for multipart uploads (performed by WriteStream) to OSS. The default is 10 MB. Keep in mind that the minimum part size for OSS is 5MB. You might experience better performance for larger chunk sizes depending on the speed of your connection to OSS.
-</td>
-</tr>
-<tr>
-  <td>
-    <code>rootdirectory</code>
-</td>
-<td>
-no
-</td>
-<td> The root directory tree in which to store all registry files. Defaults to an empty string (bucket root).
-</td>
-</tr>
-</table>

docs/storage-drivers/s3.md

@@ -1,268 +0,0 @@
-<!--[metadata]>
-+++
-title = "S3 storage driver"
-description = "Explains how to use the S3 storage drivers"
-keywords = ["registry, service, driver, images, storage,  S3"]
-[menu.main]
-parent="smn_storagedrivers"
-+++
-<![end-metadata]-->
-
-
-# S3 storage driver
-
-An implementation of the `storagedriver.StorageDriver` interface which uses Amazon S3 or S3 compatible services for object storage.
-
-## Parameters
-
-<table>
-  <tr>
-    <th>Parameter</th>
-    <th>Required</th>
-    <th>Description</th>
-  </tr>
-  <tr>
-    <td>
-      <code>accesskey</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      Your AWS Access Key.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>secretkey</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      Your AWS Secret Key.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>region</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      The AWS region in which your bucket exists. For the moment, the Go AWS
-      library in use does not use the newer DNS based bucket routing.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>regionendpoint</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Endpoint for S3 compatible storage services (Minio, etc)
-    </td>
-  </tr>
-    <tr>
-    <td>
-      <code>bucket</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      The bucket name in which you want to store the registry's data.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>encrypt</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-       Specifies whether the registry stores the image in encrypted format or
-       not. A boolean value. The default is false.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>keyid</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-       Optional KMS key ID to use for encryption (encrypt must be true, or this
-       parameter will be ignored). The default is none.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>secure</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Indicates whether to use HTTPS instead of HTTP. A boolean value. The
-      default is <code>true</code>.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>v4auth</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Indicates whether the registry uses Version 4 of AWS's authentication.
-      Generally, you should set this to <code>true</code>. By default, this is
-      <code>false</code>.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>chunksize</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      The S3 API requires multipart upload chunks to be at least 5MB. This value
-      should be a number that is larger than 5*1024*1024.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>rootdirectory</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      This is a prefix that will be applied to all S3 keys to allow you to segment data in your bucket if necessary.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>storageclass</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      The S3 storage class applied to each registry file. The default value is STANDARD.
-    </td>
-  </tr>
-</table>
-
-
-`accesskey`: Your aws access key.
-
-`secretkey`: Your aws secret key.
-
-**Note** You can provide empty strings for your access and secret keys if you plan on running the driver on an ec2 instance and will handle authentication with the instance's credentials.
-
-`region`: The name of the aws region in which you would like to store objects (for example `us-east-1`). For a list of regions, you can look at http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html
-
-`regionendpoint`: (optional) Endpoint URL for S3 compatible APIs. This should not be provided when using Amazon S3.
-
-`bucket`: The name of your S3 bucket where you wish to store objects. The bucket must exist prior to the driver initialization.
-
-`encrypt`: (optional) Whether you would like your data encrypted on the server side (defaults to false if not specified).
-
-`keyid`: (optional) Whether you would like your data encrypted with this KMS key ID (defaults to none if not specified, will be ignored if encrypt is not true).
-
-`secure`: (optional) Whether you would like to transfer data to the bucket over ssl or not. Defaults to true (meaning transferring over ssl) if not specified. Note that while setting this to false will improve performance, it is not recommended due to security concerns.
-
-`v4auth`: (optional) Whether you would like to use aws signature version 4 with your requests. This defaults to false if not specified (note that the eu-central-1 region does not work with version 2 signatures, so the driver will error out if initialized with this region and v4auth set to false)
-
-`chunksize`: (optional) The default part size for multipart uploads (performed by WriteStream) to S3. The default is 10 MB. Keep in mind that the minimum part size for S3 is 5MB. Depending on the speed of your connection to S3, a larger chunk size may result in better performance; faster connections will benefit from larger chunk sizes.
-
-`rootdirectory`: (optional) The root directory tree in which all registry files will be stored. Defaults to the empty string (bucket root).
-
-`storageclass`: (optional) The storage class applied to each registry file. Defaults to STANDARD. Valid options are STANDARD and REDUCED_REDUNDANCY.
-
-## S3 permission scopes
-
-The following IAM permissions are required by the registry for push and pull.  See [the S3 policy documentation](http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html) for more details.
-
-```
- "Statement": [
-      {
-        "Effect": "Allow",
-        "Action": [
-          "s3:ListBucket",
-          "s3:GetBucketLocation",
-          "s3:ListBucketMultipartUploads"
-        ],
-        "Resource": "arn:aws:s3:::mybucket"
-      },
-      {
-        "Effect": "Allow",
-        "Action": [
-          "s3:PutObject",
-          "s3:GetObject",
-          "s3:DeleteObject",
-          "s3:ListMultipartUploadParts",
-          "s3:AbortMultipartUpload"
-        ],
-        "Resource": "arn:aws:s3:::mybucket/*"
-      }
-]
-```
-
-# CloudFront as Middleware with S3 backend
-
-## Use Case
-
-Adding CloudFront as a middleware for your S3 backed registry can dramatically improve pull times. Your registry will have the ability to retrieve your images from edge servers, rather than the geographically limited location of your S3 bucket. The farther your registry is from your bucket, the more improvements you will see. See [Amazon CloudFront](https://aws.amazon.com/cloudfront/details/).
-
-## Configuring CloudFront for Distribution
-
-If you are unfamiliar with creating a CloudFront distribution, see [Getting Started with Cloudfront](http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/GettingStarted.html).
-
-Defaults can be kept in most areas except:
-
-### Origin:
-
-The CloudFront distribution must be created such that the `Origin Path` is set to the directory level of the root "docker" key in S3. If your registry exists on the root of the bucket, this path should be left blank.
-
-### Behaviors:
-
-  - Viewer Protocol Policy: HTTPS Only
-  - Allowed HTTP Methods: GET, HEAD, OPTIONS, PUT, POST, PATCH, DELETE
-  - Cached HTTP Methods: OPTIONS (checked)
-  - Restrict Viewer Access (Use Signed URLs or Signed Cookies): Yes
-    - Trusted Signers: Self (Can add other accounts as long as you have access to CloudFront Key Pairs for those additional accounts)
-
-## Registry configuration
-
-Here the `middleware` option is used. It is still important to keep the `storage` option as CloudFront will only handle `pull` actions; `push` actions are still directly written to S3.
-
-The following example shows what you will need at minimum:
-```
-...
-storage:
-  s3:
-    region: us-east-1
-    bucket: docker.myregistry.com
-middleware:
-  storage:
-    - name: cloudfront
-      options:
-        baseurl: https://abcdefghijklmn.cloudfront.net/
-        privatekey: /etc/docker/cloudfront/pk-ABCEDFGHIJKLMNOPQRST.pem
-        keypairid: ABCEDFGHIJKLMNOPQRST
-...
-```
-
-## CloudFront Key-Pair
-
-A CloudFront key-pair is required for all AWS accounts needing access to your CloudFront distribution. For information, please see [Creating CloudFront Key Pairs](http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/private-content-trusted-signers.html#private-content-creating-cloudfront-key-pairs).

docs/storage-drivers/swift.md

@@ -1,246 +0,0 @@
-<!--[metadata]>
-+++
-title = "Swift storage driver"
-description = "Explains how to use the OpenStack swift storage driver"
-keywords = ["registry, service, driver, images, storage,  swift"]
-[menu.main]
-parent="smn_storagedrivers"
-+++
-<![end-metadata]-->
-
-
-# OpenStack Swift storage driver
-
-An implementation of the `storagedriver.StorageDriver` interface that uses [OpenStack Swift](http://docs.openstack.org/developer/swift/) for object storage.
-
-## Parameters
-
-
-<table>
-  <tr>
-    <th>Parameter</th>
-    <th>Required</th>
-    <th>Description</th>
-  </tr>
-  <tr>
-    <td>
-      <code>authurl</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      URL for obtaining an auth token. https://storage.myprovider.com/v2.0 or https://storage.myprovider.com/v3/auth
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>username</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      Your Openstack user name.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>password</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      Your Openstack password.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>region</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      The Openstack region in which your container exists.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>container</code>
-    </td>
-    <td>
-      yes
-    </td>
-    <td>
-      The name of your Swift container where you wish to store the registry's data. The driver creates the named container during its initialization.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>tenant</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Your Openstack tenant name. You can either use <code>tenant</code> or <code>tenantid</code>.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>tenantid</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Your Openstack tenant id. You can either use <code>tenant</code> or <code>tenantid</code>.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>domain</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Your Openstack domain name for Identity v3 API. You can either use <code>domain</code> or <code>domainid</code>.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>domainid</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Your Openstack domain id for Identity v3 API. You can either use <code>domain</code> or <code>domainid</code>.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>trustid</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Your Openstack trust id for Identity v3 API.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>insecureskipverify</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      true to skip TLS verification, false by default.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>chunksize</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Size of the data segments for the Swift Dynamic Large Objects. This value should be a number (defaults to 5M).
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>prefix</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      This is a prefix that will be applied to all Swift keys to allow you to segment data in your container if necessary. Defaults to the empty string which is the container's root.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>secretkey</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      The secret key used to generate temporary URLs.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>accesskey</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      The access key to generate temporary URLs. It is used by HP Cloud Object Storage in addition to the `secretkey` parameter.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>authversion</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      Specify the OpenStack Auth's version,for example <code>3</code>. By default the driver will autodetect the auth's version from the AuthURL.
-    </td>
-  </tr>
-  <tr>
-    <td>
-      <code>endpointtype</code>
-    </td>
-    <td>
-      no
-    </td>
-    <td>
-      The endpoint type used when connecting to swift. Possible values are `public`, `internal` and `admin`. Default is `public`.
-    </td>
-  </tr>
-</table>
-
-The features supported by the Swift server are queried by requesting the `/info` URL on the server. In case the administrator
-disabled that feature, the configuration file can specify the following optional parameters :
-
-<table>
-<tr>
-    <td>
-    <code>tempurlcontainerkey</code>
-    </td>
-    <td>
-    <p>
-    Specify whether to use container secret key to generate temporary URL when set to true, or the account secret key otherwise.</p>
-    </p>
-    </td>
-</tr>
-<tr>
-    <td>
-    <code>tempurlmethods</code>
-    </td>
-    <td>
-    <p>
-    Array of HTTP methods that are supported by the TempURL middleware of the Swift server. Example:</p>
-    <code>
-    - tempurlmethods:
-      - GET
-      - PUT
-      - HEAD
-      - POST
-      - DELETE
-    </code>
-    </p>
-    </td>
-</tr>
-</table>

registry/auth/silly/access_test.go

@@ -16,7 +16,7 @@ func TestSillyAccessController(t *testing.T) {
 	}
 
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		ctx := context.WithValue(nil, "http.request", r)
+		ctx := context.WithRequest(context.Background(), r)
 		authCtx, err := ac.Authorized(ctx)
 		if err != nil {
 			switch err := err.(type) {

registry/auth/token/token_test.go

@@ -284,7 +284,7 @@ func TestAccessController(t *testing.T) {
 		Action: "baz",
 	}
 
-	ctx := context.WithValue(nil, "http.request", req)
+	ctx := context.WithRequest(context.Background(), req)
 	authCtx, err := accessController.Authorized(ctx, testAccess)
 	challenge, ok := err.(auth.Challenge)
 	if !ok {

registry/handlers/app.go

@@ -425,6 +425,8 @@ func (app *App) configureEvents(configuration *configuration.Configuration) {
 	}
 }
 
+type redisStartAtKey struct{}
+
 func (app *App) configureRedis(configuration *configuration.Configuration) {
 	if configuration.Redis.Addr == "" {
 		ctxu.GetLogger(app).Infof("redis not configured")
@@ -434,11 +436,11 @@ func (app *App) configureRedis(configuration *configuration.Configuration) {
 	pool := &redis.Pool{
 		Dial: func() (redis.Conn, error) {
 			// TODO(stevvooe): Yet another use case for contextual timing.
-			ctx := context.WithValue(app, "redis.connect.startedat", time.Now())
+			ctx := context.WithValue(app, redisStartAtKey{}, time.Now())
 
 			done := func(err error) {
 				logger := ctxu.GetLoggerWithField(ctx, "redis.connect.duration",
-					ctxu.Since(ctx, "redis.connect.startedat"))
+					ctxu.Since(ctx, redisStartAtKey{}))
 				if err != nil {
 					logger.Errorf("redis: error connecting: %v", err)
 				} else {
@@ -671,6 +673,18 @@ func (app *App) dispatcher(dispatch dispatchFunc) http.Handler {
 	})
 }
 
+type errCodeKey struct{}
+
+func (errCodeKey) String() string { return "err.code" }
+
+type errMessageKey struct{}
+
+func (errMessageKey) String() string { return "err.message" }
+
+type errDetailKey struct{}
+
+func (errDetailKey) String() string { return "err.detail" }
+
 func (app *App) logError(context context.Context, errors errcode.Errors) {
 	for _, e1 := range errors {
 		var c ctxu.Context
@@ -678,23 +692,23 @@ func (app *App) logError(context context.Context, errors errcode.Errors) {
 		switch e1.(type) {
 		case errcode.Error:
 			e, _ := e1.(errcode.Error)
-			c = ctxu.WithValue(context, "err.code", e.Code)
-			c = ctxu.WithValue(c, "err.message", e.Code.Message())
-			c = ctxu.WithValue(c, "err.detail", e.Detail)
+			c = ctxu.WithValue(context, errCodeKey{}, e.Code)
+			c = ctxu.WithValue(c, errMessageKey{}, e.Code.Message())
+			c = ctxu.WithValue(c, errDetailKey{}, e.Detail)
 		case errcode.ErrorCode:
 			e, _ := e1.(errcode.ErrorCode)
-			c = ctxu.WithValue(context, "err.code", e)
-			c = ctxu.WithValue(c, "err.message", e.Message())
+			c = ctxu.WithValue(context, errCodeKey{}, e)
+			c = ctxu.WithValue(c, errMessageKey{}, e.Message())
 		default:
 			// just normal go 'error'
-			c = ctxu.WithValue(context, "err.code", errcode.ErrorCodeUnknown)
-			c = ctxu.WithValue(c, "err.message", e1.Error())
+			c = ctxu.WithValue(context, errCodeKey{}, errcode.ErrorCodeUnknown)
+			c = ctxu.WithValue(c, errMessageKey{}, e1.Error())
 		}
 
 		c = ctxu.WithLogger(c, ctxu.GetLogger(c,
-			"err.code",
-			"err.message",
-			"err.detail"))
+			errCodeKey{},
+			errMessageKey{},
+			errDetailKey{}))
 		ctxu.GetResponseLogger(c).Errorf("response completed with error")
 	}
 }

registry/handlers/blobupload.go

@@ -179,8 +179,8 @@ func (buh *blobUploadHandler) PatchBlobData(w http.ResponseWriter, r *http.Reque
 
 	// TODO(dmcgowan): support Content-Range header to seek and write range
 
-	if err := copyFullPayload(w, r, buh.Upload, buh, "blob PATCH", &buh.Errors); err != nil {
-		// copyFullPayload reports the error if necessary
+	if err := copyFullPayload(w, r, buh.Upload, -1, buh, "blob PATCH"); err != nil {
+		buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err.Error()))
 		return
 	}
 
@@ -218,8 +218,8 @@ func (buh *blobUploadHandler) PutBlobUploadComplete(w http.ResponseWriter, r *ht
 		return
 	}
 
-	if err := copyFullPayload(w, r, buh.Upload, buh, "blob PUT", &buh.Errors); err != nil {
-		// copyFullPayload reports the error if necessary
+	if err := copyFullPayload(w, r, buh.Upload, -1, buh, "blob PUT"); err != nil {
+		buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err.Error()))
 		return
 	}
 

registry/handlers/catalog.go

@@ -9,6 +9,7 @@ import (
 	"strconv"
 
 	"github.com/docker/distribution/registry/api/errcode"
+	"github.com/docker/distribution/registry/storage/driver"
 	"github.com/gorilla/handlers"
 )
 
@@ -45,7 +46,9 @@ func (ch *catalogHandler) GetCatalog(w http.ResponseWriter, r *http.Request) {
 	repos := make([]string, maxEntries)
 
 	filled, err := ch.App.registry.Repositories(ch.Context, repos, lastEntry)
-	if err == io.EOF {
+	_, pathNotFound := err.(driver.PathNotFoundError)
+
+	if err == io.EOF || pathNotFound {
 		moreEntries = false
 	} else if err != nil {
 		ch.Errors = append(ch.Errors, errcode.ErrorCodeUnknown.WithDetail(err))

registry/handlers/helpers.go

@@ -6,7 +6,6 @@ import (
 	"net/http"
 
 	ctxu "github.com/docker/distribution/context"
-	"github.com/docker/distribution/registry/api/errcode"
 )
 
 // closeResources closes all the provided resources after running the target
@@ -23,7 +22,9 @@ func closeResources(handler http.Handler, closers ...io.Closer) http.Handler {
 // copyFullPayload copies the payload of an HTTP request to destWriter. If it
 // receives less content than expected, and the client disconnected during the
 // upload, it avoids sending a 400 error to keep the logs cleaner.
-func copyFullPayload(responseWriter http.ResponseWriter, r *http.Request, destWriter io.Writer, context ctxu.Context, action string, errSlice *errcode.Errors) error {
+//
+// The copy will be limited to `limit` bytes, if limit is greater than zero.
+func copyFullPayload(responseWriter http.ResponseWriter, r *http.Request, destWriter io.Writer, limit int64, context ctxu.Context, action string) error {
 	// Get a channel that tells us if the client disconnects
 	var clientClosed <-chan bool
 	if notifier, ok := responseWriter.(http.CloseNotifier); ok {
@@ -32,8 +33,13 @@ func copyFullPayload(responseWriter http.ResponseWriter, r *http.Request, destWr
 		ctxu.GetLogger(context).Warnf("the ResponseWriter does not implement CloseNotifier (type: %T)", responseWriter)
 	}
 
+	var body = r.Body
+	if limit > 0 {
+		body = http.MaxBytesReader(responseWriter, body, limit)
+	}
+
 	// Read in the data, if any.
-	copied, err := io.Copy(destWriter, r.Body)
+	copied, err := io.Copy(destWriter, body)
 	if clientClosed != nil && (err != nil || (r.ContentLength > 0 && copied < r.ContentLength)) {
 		// Didn't receive as much content as expected. Did the client
 		// disconnect during the request? If so, avoid returning a 400
@@ -58,7 +64,6 @@ func copyFullPayload(responseWriter http.ResponseWriter, r *http.Request, destWr
 
 	if err != nil {
 		ctxu.GetLogger(context).Errorf("unknown error reading request payload: %v", err)
-		*errSlice = append(*errSlice, errcode.ErrorCodeUnknown.WithDetail(err))
 		return err
 	}
 

registry/handlers/images.go

@@ -21,8 +21,9 @@ import (
 // These constants determine which architecture and OS to choose from a
 // manifest list when downconverting it to a schema1 manifest.
 const (
-	defaultArch = "amd64"
-	defaultOS   = "linux"
+	defaultArch         = "amd64"
+	defaultOS           = "linux"
+	maxManifestBodySize = 4 << 20
 )
 
 // imageManifestDispatcher takes the request context and builds the
@@ -240,8 +241,9 @@ func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http
 	}
 
 	var jsonBuf bytes.Buffer
-	if err := copyFullPayload(w, r, &jsonBuf, imh, "image manifest PUT", &imh.Errors); err != nil {
+	if err := copyFullPayload(w, r, &jsonBuf, maxManifestBodySize, imh, "image manifest PUT"); err != nil {
 		// copyFullPayload reports the error if necessary
+		imh.Errors = append(imh.Errors, v2.ErrorCodeManifestInvalid.WithDetail(err.Error()))
 		return
 	}
 

registry/proxy/proxymanifeststore_test.go

@@ -111,7 +111,7 @@ func newManifestStoreTestEnv(t *testing.T, name, tag string) *manifestStoreTestE
 		stats:     make(map[string]int),
 	}
 
-	manifestDigest, err := populateRepo(t, ctx, truthRepo, name, tag)
+	manifestDigest, err := populateRepo(ctx, t, truthRepo, name, tag)
 	if err != nil {
 		t.Fatalf(err.Error())
 	}
@@ -148,7 +148,7 @@ func newManifestStoreTestEnv(t *testing.T, name, tag string) *manifestStoreTestE
 	}
 }
 
-func populateRepo(t *testing.T, ctx context.Context, repository distribution.Repository, name, tag string) (digest.Digest, error) {
+func populateRepo(ctx context.Context, t *testing.T, repository distribution.Repository, name, tag string) (digest.Digest, error) {
 	m := schema1.Manifest{
 		Versioned: manifest.Versioned{
 			SchemaVersion: 1,

registry/storage/blobstore.go

@@ -27,7 +27,7 @@ func (bs *blobStore) Get(ctx context.Context, dgst digest.Digest) ([]byte, error
 		return nil, err
 	}
 
-	p, err := bs.driver.GetContent(ctx, bp)
+	p, err := getContent(ctx, bs.driver, bp)
 	if err != nil {
 		switch err.(type) {
 		case driver.PathNotFoundError:
@@ -37,7 +37,7 @@ func (bs *blobStore) Get(ctx context.Context, dgst digest.Digest) ([]byte, error
 		return nil, err
 	}
 
-	return p, err
+	return p, nil
 }
 
 func (bs *blobStore) Open(ctx context.Context, dgst digest.Digest) (distribution.ReadSeekCloser, error) {

registry/storage/cache/cachecheck/suite.go

@@ -16,12 +16,12 @@ import (
 func CheckBlobDescriptorCache(t *testing.T, provider cache.BlobDescriptorCacheProvider) {
 	ctx := context.Background()
 
-	checkBlobDescriptorCacheEmptyRepository(t, ctx, provider)
-	checkBlobDescriptorCacheSetAndRead(t, ctx, provider)
-	checkBlobDescriptorCacheClear(t, ctx, provider)
+	checkBlobDescriptorCacheEmptyRepository(ctx, t, provider)
+	checkBlobDescriptorCacheSetAndRead(ctx, t, provider)
+	checkBlobDescriptorCacheClear(ctx, t, provider)
 }
 
-func checkBlobDescriptorCacheEmptyRepository(t *testing.T, ctx context.Context, provider cache.BlobDescriptorCacheProvider) {
+func checkBlobDescriptorCacheEmptyRepository(ctx context.Context, t *testing.T, provider cache.BlobDescriptorCacheProvider) {
 	if _, err := provider.Stat(ctx, "sha384:abc111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111"); err != distribution.ErrBlobUnknown {
 		t.Fatalf("expected unknown blob error with empty store: %v", err)
 	}
@@ -59,7 +59,7 @@ func checkBlobDescriptorCacheEmptyRepository(t *testing.T, ctx context.Context,
 	}
 }
 
-func checkBlobDescriptorCacheSetAndRead(t *testing.T, ctx context.Context, provider cache.BlobDescriptorCacheProvider) {
+func checkBlobDescriptorCacheSetAndRead(ctx context.Context, t *testing.T, provider cache.BlobDescriptorCacheProvider) {
 	localDigest := digest.Digest("sha384:abc111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111")
 	expected := distribution.Descriptor{
 		Digest:    "sha256:abc1111111111111111111111111111111111111111111111111111111111111",
@@ -143,7 +143,7 @@ func checkBlobDescriptorCacheSetAndRead(t *testing.T, ctx context.Context, provi
 	}
 }
 
-func checkBlobDescriptorCacheClear(t *testing.T, ctx context.Context, provider cache.BlobDescriptorCacheProvider) {
+func checkBlobDescriptorCacheClear(ctx context.Context, t *testing.T, provider cache.BlobDescriptorCacheProvider) {
 	localDigest := digest.Digest("sha384:def111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111")
 	expected := distribution.Descriptor{
 		Digest:    "sha256:def1111111111111111111111111111111111111111111111111111111111111",

registry/storage/catalog.go

@@ -10,15 +10,14 @@ import (
 	"github.com/docker/distribution/registry/storage/driver"
 )
 
-// ErrFinishedWalk is used when the called walk function no longer wants
-// to accept any more values.  This is used for pagination when the
-// required number of repos have been found.
-var ErrFinishedWalk = errors.New("finished walk")
+// errFinishedWalk signals an early exit to the walk when the current query
+// is satisfied.
+var errFinishedWalk = errors.New("finished walk")
 
 // Returns a list, or partial list, of repositories in the registry.
 // Because it's a quite expensive operation, it should only be used when building up
 // an initial set of repositories.
-func (reg *registry) Repositories(ctx context.Context, repos []string, last string) (n int, errVal error) {
+func (reg *registry) Repositories(ctx context.Context, repos []string, last string) (n int, err error) {
 	var foundRepos []string
 
 	if len(repos) == 0 {
@@ -30,26 +29,22 @@ func (reg *registry) Repositories(ctx context.Context, repos []string, last stri
 		return 0, err
 	}
 
+	// errFinishedWalk signals an early exit to the walk when the current query
+	// is satisfied.
+	errFinishedWalk := errors.New("finished walk")
+
 	err = Walk(ctx, reg.blobStore.driver, root, func(fileInfo driver.FileInfo) error {
-		filePath := fileInfo.Path()
-
-		// lop the base path off
-		repoPath := filePath[len(root)+1:]
-
-		_, file := path.Split(repoPath)
-		if file == "_layers" {
-			repoPath = strings.TrimSuffix(repoPath, "/_layers")
-			if repoPath > last {
-				foundRepos = append(foundRepos, repoPath)
-			}
-			return ErrSkipDir
-		} else if strings.HasPrefix(file, "_") {
-			return ErrSkipDir
+		err := handleRepository(fileInfo, root, last, func(repoPath string) error {
+			foundRepos = append(foundRepos, repoPath)
+			return nil
+		})
+		if err != nil {
+			return err
 		}
 
 		// if we've filled our array, no need to walk any further
 		if len(foundRepos) == len(repos) {
-			return ErrFinishedWalk
+			return errFinishedWalk
 		}
 
 		return nil
@@ -57,41 +52,102 @@ func (reg *registry) Repositories(ctx context.Context, repos []string, last stri
 
 	n = copy(repos, foundRepos)
 
-	// Signal that we have no more entries by setting EOF
-	if len(foundRepos) <= len(repos) && err != ErrFinishedWalk {
-		errVal = io.EOF
+	switch err {
+	case nil:
+		// nil means that we completed walk and didn't fill buffer. No more
+		// records are available.
+		err = io.EOF
+	case errFinishedWalk:
+		// more records are available.
+		err = nil
 	}
 
-	return n, errVal
+	return n, err
 }
 
 // Enumerate applies ingester to each repository
 func (reg *registry) Enumerate(ctx context.Context, ingester func(string) error) error {
-	repoNameBuffer := make([]string, 100)
-	var last string
-	for {
-		n, err := reg.Repositories(ctx, repoNameBuffer, last)
-		if err != nil && err != io.EOF {
-			return err
+	root, err := pathFor(repositoriesRootPathSpec{})
+	if err != nil {
+		return err
+	}
+
+	err = Walk(ctx, reg.blobStore.driver, root, func(fileInfo driver.FileInfo) error {
+		return handleRepository(fileInfo, root, "", ingester)
+	})
+
+	return err
+}
+
+// lessPath returns true if one path a is less than path b.
+//
+// A component-wise comparison is done, rather than the lexical comparison of
+// strings.
+func lessPath(a, b string) bool {
+	// we provide this behavior by making separator always sort first.
+	return compareReplaceInline(a, b, '/', '\x00') < 0
+}
+
+// compareReplaceInline modifies runtime.cmpstring to replace old with new
+// during a byte-wise comparison.
+func compareReplaceInline(s1, s2 string, old, new byte) int {
+	l := len(s1)
+	if len(s2) < l {
+		l = len(s2)
+	}
+
+	for i := 0; i < l; i++ {
+		c1, c2 := s1[i], s2[i]
+		if c1 == old {
+			c1 = new
 		}
 
-		if n == 0 {
-			break
+		if c2 == old {
+			c2 = new
 		}
 
-		last = repoNameBuffer[n-1]
-		for i := 0; i < n; i++ {
-			repoName := repoNameBuffer[i]
-			err = ingester(repoName)
-			if err != nil {
+		if c1 < c2 {
+			return -1
+		}
+
+		if c1 > c2 {
+			return +1
+		}
+	}
+
+	if len(s1) < len(s2) {
+		return -1
+	}
+
+	if len(s1) > len(s2) {
+		return +1
+	}
+
+	return 0
+}
+
+// handleRepository calls function fn with a repository path if fileInfo
+// has a path of a repository under root and that it is lexographically
+// after last. Otherwise, it will return ErrSkipDir. This should be used
+// with Walk to do handling with repositories in a storage.
+func handleRepository(fileInfo driver.FileInfo, root, last string, fn func(repoPath string) error) error {
+	filePath := fileInfo.Path()
+
+	// lop the base path off
+	repo := filePath[len(root)+1:]
+
+	_, file := path.Split(repo)
+	if file == "_layers" {
+		repo = strings.TrimSuffix(repo, "/_layers")
+		if lessPath(last, repo) {
+			if err := fn(repo); err != nil {
 				return err
 			}
 		}
-
-		if err == io.EOF {
-			break
-		}
+		return ErrSkipDir
+	} else if strings.HasPrefix(file, "_") {
+		return ErrSkipDir
 	}
-	return nil
 
+	return nil
 }

registry/storage/catalog_test.go

@@ -1,6 +1,7 @@
 package storage
 
 import (
+	"fmt"
 	"io"
 	"testing"
 
@@ -112,7 +113,28 @@ func TestCatalogInParts(t *testing.T) {
 	if !testEq(p, env.expected[chunkLen*2:chunkLen*3-1], numFilled) {
 		t.Errorf("Expected catalog third chunk err")
 	}
+}
 
+func TestCatalogEnumerate(t *testing.T) {
+	env := setupFS(t)
+
+	var repos []string
+	repositoryEnumerator := env.registry.(distribution.RepositoryEnumerator)
+	err := repositoryEnumerator.Enumerate(env.ctx, func(repoName string) error {
+		repos = append(repos, repoName)
+		return nil
+	})
+	if err != nil {
+		t.Errorf("Expected catalog enumerate err")
+	}
+
+	if len(repos) != len(env.expected) {
+		t.Errorf("Expected catalog enumerate doesn't have correct number of values")
+	}
+
+	if !testEq(repos, env.expected, len(env.expected)) {
+		t.Errorf("Expected catalog enumerate not over all values")
+	}
 }
 
 func testEq(a, b []string, size int) bool {
@@ -123,3 +145,42 @@ func testEq(a, b []string, size int) bool {
 	}
 	return true
 }
+
+func setupBadWalkEnv(t *testing.T) *setupEnv {
+	d := newBadListDriver()
+	ctx := context.Background()
+	registry, err := NewRegistry(ctx, d, BlobDescriptorCacheProvider(memory.NewInMemoryBlobDescriptorCacheProvider()), EnableRedirect)
+	if err != nil {
+		t.Fatalf("error creating registry: %v", err)
+	}
+
+	return &setupEnv{
+		ctx:      ctx,
+		driver:   d,
+		registry: registry,
+	}
+}
+
+type badListDriver struct {
+	driver.StorageDriver
+}
+
+var _ driver.StorageDriver = &badListDriver{}
+
+func newBadListDriver() *badListDriver {
+	return &badListDriver{StorageDriver: inmemory.New()}
+}
+
+func (d *badListDriver) List(ctx context.Context, path string) ([]string, error) {
+	return nil, fmt.Errorf("List error")
+}
+
+func TestCatalogWalkError(t *testing.T) {
+	env := setupBadWalkEnv(t)
+	p := make([]string, 1)
+
+	_, err := env.registry.Repositories(env.ctx, p, "")
+	if err == io.EOF {
+		t.Errorf("Expected catalog driver list error")
+	}
+}

registry/storage/garbagecollect.go

@@ -97,7 +97,7 @@ func MarkAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 	})
 
 	if err != nil {
-		return fmt.Errorf("failed to mark: %v\n", err)
+		return fmt.Errorf("failed to mark: %v", err)
 	}
 
 	// sweep
@@ -125,7 +125,7 @@ func MarkAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 		}
 		err = vacuum.RemoveBlob(string(dgst))
 		if err != nil {
-			return fmt.Errorf("failed to delete blob %s: %v\n", dgst, err)
+			return fmt.Errorf("failed to delete blob %s: %v", dgst, err)
 		}
 	}
 

registry/storage/io.go

@@ -0,0 +1,71 @@
+package storage
+
+import (
+	"errors"
+	"io"
+	"io/ioutil"
+
+	"github.com/docker/distribution/context"
+	"github.com/docker/distribution/registry/storage/driver"
+)
+
+const (
+	maxBlobGetSize = 4 << 20
+)
+
+func getContent(ctx context.Context, driver driver.StorageDriver, p string) ([]byte, error) {
+	r, err := driver.Reader(ctx, p, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	return readAllLimited(r, maxBlobGetSize)
+}
+
+func readAllLimited(r io.Reader, limit int64) ([]byte, error) {
+	r = limitReader(r, limit)
+	return ioutil.ReadAll(r)
+}
+
+// limitReader returns a new reader limited to n bytes. Unlike io.LimitReader,
+// this returns an error when the limit reached.
+func limitReader(r io.Reader, n int64) io.Reader {
+	return &limitedReader{r: r, n: n}
+}
+
+// limitedReader implements a reader that errors when the limit is reached.
+//
+// Partially cribbed from net/http.MaxBytesReader.
+type limitedReader struct {
+	r   io.Reader // underlying reader
+	n   int64     // max bytes remaining
+	err error     // sticky error
+}
+
+func (l *limitedReader) Read(p []byte) (n int, err error) {
+	if l.err != nil {
+		return 0, l.err
+	}
+	if len(p) == 0 {
+		return 0, nil
+	}
+	// If they asked for a 32KB byte read but only 5 bytes are
+	// remaining, no need to read 32KB. 6 bytes will answer the
+	// question of the whether we hit the limit or go past it.
+	if int64(len(p)) > l.n+1 {
+		p = p[:l.n+1]
+	}
+	n, err = l.r.Read(p)
+
+	if int64(n) <= l.n {
+		l.n -= int64(n)
+		l.err = err
+		return n, err
+	}
+
+	n = int(l.n)
+	l.n = 0
+
+	l.err = errors.New("storage: read exceeds limit")
+	return n, l.err
+}

version/version.go

@@ -8,4 +8,4 @@ var Package = "github.com/docker/distribution"
 // the latest release tag by hand, always suffixed by "+unknown". During
 // build, it will be replaced by the actual version. The value here will be
 // used if the registry is run after a go get based install.
-var Version = "v2.4.1+unknown"
+var Version = "v2.5.2+unknown"