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Implements garbage collection subcommand

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- Includes a change in the command to run the registry. The registry
  server itself is now started up as a subcommand.
- Includes changes to the high level interfaces to support enumeration
  of various registry objects.

Signed-off-by: Andrew T Nguyen <andrew.nguyen@docker.com>
This commit is contained in:
Andrew T Nguyen 2016-01-19 14:26:15 -08:00
parent e430d77342
commit feab4aafbc
34 changed files with 1702 additions and 36 deletions
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@ -16,4 +16,4 @@ RUN make PREFIX=/go clean binaries
VOLUME ["/var/lib/registry"]
EXPOSE 5000
ENTRYPOINT ["registry"]
CMD ["/etc/docker/registry/config.yml"]
CMD ["serve", "/etc/docker/registry/config.yml"]

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AWS SDK for Go
Copyright 2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
Copyright 2014-2015 Stripe, Inc.

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This software is licensed under the LGPLv3, included below.
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Copyright (c) 2013 The Gorilla Handlers Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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package handlers
import (
"net/http"
"net/url"
"strings"
)
type canonical struct {
h http.Handler
domain string
code int
}
// CanonicalHost is HTTP middleware that re-directs requests to the canonical
// domain. It accepts a domain and a status code (e.g. 301 or 302) and
// re-directs clients to this domain. The existing request path is maintained.
//
// Note: If the provided domain is considered invalid by url.Parse or otherwise
// returns an empty scheme or host, clients are not re-directed.
// not re-directed.
//
// Example:
//
// r := mux.NewRouter()
// canonical := handlers.CanonicalHost("http://www.gorillatoolkit.org", 302)
// r.HandleFunc("/route", YourHandler)
//
// log.Fatal(http.ListenAndServe(":7000", canonical(r)))
//
func CanonicalHost(domain string, code int) func(h http.Handler) http.Handler {
fn := func(h http.Handler) http.Handler {
return canonical{h, domain, code}
}
return fn
}
func (c canonical) ServeHTTP(w http.ResponseWriter, r *http.Request) {
dest, err := url.Parse(c.domain)
if err != nil {
// Call the next handler if the provided domain fails to parse.
c.h.ServeHTTP(w, r)
return
}
if dest.Scheme == "" || dest.Host == "" {
// Call the next handler if the scheme or host are empty.
// Note that url.Parse won't fail on in this case.
c.h.ServeHTTP(w, r)
return
}
if !strings.EqualFold(cleanHost(r.Host), dest.Host) {
// Re-build the destination URL
dest := dest.Scheme + "://" + dest.Host + r.URL.Path
http.Redirect(w, r, dest, c.code)
}
c.h.ServeHTTP(w, r)
}
// cleanHost cleans invalid Host headers by stripping anything after '/' or ' '.
// This is backported from Go 1.5 (in response to issue #11206) and attempts to
// mitigate malformed Host headers that do not match the format in RFC7230.
func cleanHost(in string) string {
if i := strings.IndexAny(in, " /"); i != -1 {
return in[:i]
}
return in
}

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/*
Package handlers is a collection of handlers (aka "HTTP middleware") for use
with Go's net/http package (or any framework supporting http.Handler).
The package includes handlers for logging in standardised formats, compressing
HTTP responses, validating content types and other useful tools for manipulating
requests and responses.
*/
package handlers

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package handlers
import (
"net/http"
"regexp"
"strings"
)
var (
// De-facto standard header keys.
xForwardedFor = http.CanonicalHeaderKey("X-Forwarded-For")
xRealIP = http.CanonicalHeaderKey("X-Real-IP")
xForwardedProto = http.CanonicalHeaderKey("X-Forwarded-Scheme")
)
var (
// RFC7239 defines a new "Forwarded: " header designed to replace the
// existing use of X-Forwarded-* headers.
// e.g. Forwarded: for=192.0.2.60;proto=https;by=203.0.113.43
forwarded = http.CanonicalHeaderKey("Forwarded")
// Allows for a sub-match of the first value after 'for=' to the next
// comma, semi-colon or space. The match is case-insensitive.
forRegex = regexp.MustCompile(`(?i)(?:for=)([^(;|,| )]+)`)
// Allows for a sub-match for the first instance of scheme (http|https)
// prefixed by 'proto='. The match is case-insensitive.
protoRegex = regexp.MustCompile(`(?i)(?:proto=)(https|http)`)
)
// ProxyHeaders inspects common reverse proxy headers and sets the corresponding
// fields in the HTTP request struct. These are X-Forwarded-For and X-Real-IP
// for the remote (client) IP address, X-Forwarded-Proto for the scheme
// (http|https) and the RFC7239 Forwarded header, which may include both client
// IPs and schemes.
//
// NOTE: This middleware should only be used when behind a reverse
// proxy like nginx, HAProxy or Apache. Reverse proxies that don't (or are
// configured not to) strip these headers from client requests, or where these
// headers are accepted "as is" from a remote client (e.g. when Go is not behind
// a proxy), can manifest as a vulnerability if your application uses these
// headers for validating the 'trustworthiness' of a request.
func ProxyHeaders(h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
// Set the remote IP with the value passed from the proxy.
if fwd := getIP(r); fwd != "" {
r.RemoteAddr = fwd
}
// Set the scheme (proto) with the value passed from the proxy.
if scheme := getScheme(r); scheme != "" {
r.URL.Scheme = scheme
}
// Call the next handler in the chain.
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
// getIP retrieves the IP from the X-Forwarded-For, X-Real-IP and RFC7239
// Forwarded headers (in that order).
func getIP(r *http.Request) string {
var addr string
if fwd := r.Header.Get(xForwardedFor); fwd != "" {
// Only grab the first (client) address. Note that '192.168.0.1,
// 10.1.1.1' is a valid key for X-Forwarded-For where addresses after
// the first may represent forwarding proxies earlier in the chain.
s := strings.Index(fwd, ", ")
if s == -1 {
s = len(fwd)
}
addr = fwd[:s]
} else if fwd := r.Header.Get(xRealIP); fwd != "" {
// X-Real-IP should only contain one IP address (the client making the
// request).
addr = fwd
} else if fwd := r.Header.Get(forwarded); fwd != "" {
// match should contain at least two elements if the protocol was
// specified in the Forwarded header. The first element will always be
// the 'for=' capture, which we ignore. In the case of multiple IP
// addresses (for=8.8.8.8, 8.8.4.4,172.16.1.20 is valid) we only
// extract the first, which should be the client IP.
if match := forRegex.FindStringSubmatch(fwd); len(match) > 1 {
// IPv6 addresses in Forwarded headers are quoted-strings. We strip
// these quotes.
addr = strings.Trim(match[1], `"`)
}
}
return addr
}
// getScheme retrieves the scheme from the X-Forwarded-Proto and RFC7239
// Forwarded headers (in that order).
func getScheme(r *http.Request) string {
var scheme string
// Retrieve the scheme from X-Forwarded-Proto.
if proto := r.Header.Get(xForwardedProto); proto != "" {
scheme = strings.ToLower(proto)
} else if proto := r.Header.Get(forwarded); proto != "" {
// match should contain at least two elements if the protocol was
// specified in the Forwarded header. The first element will always be
// the 'proto=' capture, which we ignore. In the case of multiple proto
// parameters (invalid) we only extract the first.
if match := protoRegex.FindStringSubmatch(proto); len(match) > 1 {
scheme = strings.ToLower(match[1])
}
}
return scheme
}

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The MIT License (MIT)
Copyright (c) 2014 Noah Watkins
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

27
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Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

22
Godeps/_workspace/src/golang.org/x/crypto/PATENTS generated vendored Normal file
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Additional IP Rights Grant (Patents)
"This implementation" means the copyrightable works distributed by
Google as part of the Go project.
Google hereby grants to You a perpetual, worldwide, non-exclusive,
no-charge, royalty-free, irrevocable (except as stated in this section)
patent license to make, have made, use, offer to sell, sell, import,
transfer and otherwise run, modify and propagate the contents of this
implementation of Go, where such license applies only to those patent
claims, both currently owned or controlled by Google and acquired in
the future, licensable by Google that are necessarily infringed by this
implementation of Go. This grant does not include claims that would be
infringed only as a consequence of further modification of this
implementation. If you or your agent or exclusive licensee institute or
order or agree to the institution of patent litigation against any
entity (including a cross-claim or counterclaim in a lawsuit) alleging
that this implementation of Go or any code incorporated within this
implementation of Go constitutes direct or contributory patent
infringement, or inducement of patent infringement, then any patent
rights granted to you under this License for this implementation of Go
shall terminate as of the date such litigation is filed.

27
Godeps/_workspace/src/golang.org/x/net/LICENSE generated vendored Normal file
View File

@ -0,0 +1,27 @@
Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

22
Godeps/_workspace/src/golang.org/x/net/PATENTS generated vendored Normal file
View File

@ -0,0 +1,22 @@
Additional IP Rights Grant (Patents)
"This implementation" means the copyrightable works distributed by
Google as part of the Go project.
Google hereby grants to You a perpetual, worldwide, non-exclusive,
no-charge, royalty-free, irrevocable (except as stated in this section)
patent license to make, have made, use, offer to sell, sell, import,
transfer and otherwise run, modify and propagate the contents of this
implementation of Go, where such license applies only to those patent
claims, both currently owned or controlled by Google and acquired in
the future, licensable by Google that are necessarily infringed by this
implementation of Go. This grant does not include claims that would be
infringed only as a consequence of further modification of this
implementation. If you or your agent or exclusive licensee institute or
order or agree to the institution of patent litigation against any
entity (including a cross-claim or counterclaim in a lawsuit) alleging
that this implementation of Go or any code incorporated within this
implementation of Go constitutes direct or contributory patent
infringement, or inducement of patent infringement, then any patent
rights granted to you under this License for this implementation of Go
shall terminate as of the date such litigation is filed.

5
blobs.go
View File

@ -97,6 +97,11 @@ type BlobDeleter interface {
Delete(ctx context.Context, dgst digest.Digest) error
}
// BlobEnumerator enables iterating over blobs from storage
type BlobEnumerator interface {
Enumerate(ctx context.Context, ingester func(dgst digest.Digest) error) error
}
// BlobDescriptorService manages metadata about a blob by digest. Most
// implementations will not expose such an interface explicitly. Such mappings
// should be maintained by interacting with the BlobIngester. Hence, this is

2
cmd/registry/main.go
View File

@ -20,5 +20,5 @@ import (
)
func main() {
registry.Cmd.Execute()
registry.RootCmd.Execute()
}

28
docs/gc.md Normal file
View File

@ -0,0 +1,28 @@
<!--[metadata]>
+++
title = "Garbage Collection"
description = "High level discussion of garabage collection"
keywords = ["registry, garbage, images, tags, repository, distribution"]
+++
<![end-metadata]-->
# What Garbage Collection Does
Garbage collection is a process that delete blobs to which no manifests refer.
It 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.
# How to Run
You can run garbage collection by running
docker run --rm registry-image-name garbage-collect /etc/docker/registry/config.yml
NOTE: You should ensure that the registry itself 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.

16
manifests.go
View File

@ -53,12 +53,18 @@ type ManifestService interface {
// Delete removes the manifest specified by the given digest. Deleting
// a manifest that doesn't exist will return ErrManifestNotFound
Delete(ctx context.Context, dgst digest.Digest) error
}
// Enumerate fills 'manifests' with the manifests in this service up
// to the size of 'manifests' and returns 'n' for the number of entries
// which were filled. 'last' contains an offset in the manifest set
// and can be used to resume iteration.
//Enumerate(ctx context.Context, manifests []Manifest, last Manifest) (n int, err error)
// ManifestEnumerator enables iterating over manifests
type ManifestEnumerator interface {
// Enumerate calls ingester for each manifest.
Enumerate(ctx context.Context, ingester func(digest.Digest) error) error
}
// SignaturesGetter provides an interface for getting the signatures of a schema1 manifest. If the digest
// refered to is not a schema1 manifest, an error should be returned.
type SignaturesGetter interface {
GetSignatures(ctx context.Context, manifestDigest digest.Digest) ([]digest.Digest, error)
}
// Describable is an interface for descriptors

11
registry.go
View File

@ -40,6 +40,17 @@ type Namespace interface {
// which were filled. 'last' contains an offset in the catalog, and 'err' will be
// set to io.EOF if there are no more entries to obtain.
Repositories(ctx context.Context, repos []string, last string) (n int, err error)
// Blobs returns a blob enumerator to access all blobs
Blobs() BlobEnumerator
// BlobStatter returns a BlobStatter to control
BlobStatter() BlobStatter
}
// RepositoryEnumerator describes an operation to enumerate repositories
type RepositoryEnumerator interface {
Enumerate(ctx context.Context, ingester func(string) error) error
}
// ManifestServiceOption is a function argument for Manifest Service methods

150
registry/garbagecollect.go Normal file
View File

@ -0,0 +1,150 @@
package registry
import (
"fmt"
"os"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/manifest/schema1"
"github.com/docker/distribution/manifest/schema2"
"github.com/docker/distribution/reference"
"github.com/docker/distribution/registry/storage"
"github.com/docker/distribution/registry/storage/driver"
"github.com/docker/distribution/registry/storage/driver/factory"
"github.com/spf13/cobra"
)
func markAndSweep(storageDriver driver.StorageDriver) error {
ctx := context.Background()
// Construct a registry
registry, err := storage.NewRegistry(ctx, storageDriver)
if err != nil {
return fmt.Errorf("failed to construct registry: %v", err)
}
repositoryEnumerator, ok := registry.(distribution.RepositoryEnumerator)
if !ok {
return fmt.Errorf("coercion error: unable to convert Namespace to RepositoryEnumerator")
}
// mark
markSet := make(map[digest.Digest]struct{})
err = repositoryEnumerator.Enumerate(ctx, func(repoName string) error {
var err error
named, err := reference.ParseNamed(repoName)
if err != nil {
return fmt.Errorf("failed to parse repo name %s: %v", repoName, err)
}
repository, err := registry.Repository(ctx, named)
if err != nil {
return fmt.Errorf("failed to construct repository: %v", err)
}
manifestService, err := repository.Manifests(ctx)
if err != nil {
return fmt.Errorf("failed to construct manifest service: %v", err)
}
manifestEnumerator, ok := manifestService.(distribution.ManifestEnumerator)
if !ok {
return fmt.Errorf("coercion error: unable to convert ManifestService into ManifestEnumerator")
}
err = manifestEnumerator.Enumerate(ctx, func(dgst digest.Digest) error {
// Mark the manifest's blob
markSet[dgst] = struct{}{}
manifest, err := manifestService.Get(ctx, dgst)
if err != nil {
return fmt.Errorf("failed to retrieve manifest for digest %v: %v", dgst, err)
}
descriptors := manifest.References()
for _, descriptor := range descriptors {
markSet[descriptor.Digest] = struct{}{}
}
switch manifest.(type) {
case *schema1.SignedManifest:
signaturesGetter, ok := manifestService.(distribution.SignaturesGetter)
if !ok {
return fmt.Errorf("coercion error: unable to convert ManifestSErvice into SignaturesGetter")
}
signatures, err := signaturesGetter.GetSignatures(ctx, dgst)
if err != nil {
return fmt.Errorf("failed to get signatures for signed manifest: %v", err)
}
for _, signatureDigest := range signatures {
markSet[signatureDigest] = struct{}{}
}
break
case *schema2.DeserializedManifest:
config := manifest.(*schema2.DeserializedManifest).Config
markSet[config.Digest] = struct{}{}
break
}
return nil
})
return err
})
if err != nil {
return fmt.Errorf("failed to mark: %v\n", err)
}
// sweep
blobService := registry.Blobs()
deleteSet := make(map[digest.Digest]struct{})
err = blobService.Enumerate(ctx, func(dgst digest.Digest) error {
// check if digest is in markSet. If not, delete it!
if _, ok := markSet[dgst]; !ok {
deleteSet[dgst] = struct{}{}
}
return nil
})
// Construct vacuum
vacuum := storage.NewVacuum(ctx, storageDriver)
for dgst := range deleteSet {
err = vacuum.RemoveBlob(string(dgst))
if err != nil {
return fmt.Errorf("failed to delete blob %s: %v\n", dgst, err)
}
}
return err
}
// GCCmd is the cobra command that corresponds to the garbage-collect subcommand
var GCCmd = &cobra.Command{
Use: "garbage-collect <config>",
Short: "`garbage-collects` deletes layers not referenced by any manifests",
Long: "`garbage-collects` deletes layers not referenced by any manifests",
Run: func(cmd *cobra.Command, args []string) {
config, err := resolveConfiguration(args)
if err != nil {
fmt.Fprintf(os.Stderr, "configuration error: %v\n", err)
cmd.Usage()
os.Exit(1)
}
driver, err := factory.Create(config.Storage.Type(), config.Storage.Parameters())
if err != nil {
fmt.Fprintf(os.Stderr, "failed to construct %s driver: %v", config.Storage.Type(), err)
os.Exit(1)
}
err = markAndSweep(driver)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to garbage collect: %v", err)
os.Exit(1)
}
},
}

343
registry/garbagecollect_test.go Normal file
View File

@ -0,0 +1,343 @@
package registry
import (
"io"
"testing"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/reference"
"github.com/docker/distribution/registry/storage"
"github.com/docker/distribution/registry/storage/driver"
"github.com/docker/distribution/registry/storage/driver/inmemory"
"github.com/docker/distribution/testutil"
)
type image struct {
manifest distribution.Manifest
manifestDigest digest.Digest
layers map[digest.Digest]io.ReadSeeker
}
func createRegistry(t *testing.T, driver driver.StorageDriver) distribution.Namespace {
ctx := context.Background()
registry, err := storage.NewRegistry(ctx, driver, storage.EnableDelete)
if err != nil {
t.Fatalf("Failed to construct namespace")
}
return registry
}
func makeRepository(t *testing.T, registry distribution.Namespace, name string) distribution.Repository {
ctx := context.Background()
// Initialize a dummy repository
named, err := reference.ParseNamed(name)
if err != nil {
t.Fatalf("Failed to parse name %s: %v", name, err)
}
repo, err := registry.Repository(ctx, named)
if err != nil {
t.Fatalf("Failed to construct repository: %v", err)
}
return repo
}
func makeManifestService(t *testing.T, repository distribution.Repository) distribution.ManifestService {
ctx := context.Background()
manifestService, err := repository.Manifests(ctx)
if err != nil {
t.Fatalf("Failed to construct manifest store: %v", err)
}
return manifestService
}
func allBlobs(t *testing.T, registry distribution.Namespace) map[digest.Digest]struct{} {
ctx := context.Background()
blobService := registry.Blobs()
allBlobsMap := make(map[digest.Digest]struct{})
err := blobService.Enumerate(ctx, func(dgst digest.Digest) error {
allBlobsMap[dgst] = struct{}{}
return nil
})
if err != nil {
t.Fatalf("Error getting all blobs: %v", err)
}
return allBlobsMap
}
func uploadImage(t *testing.T, repository distribution.Repository, im image) digest.Digest {
// upload layers
err := testutil.UploadBlobs(repository, im.layers)
if err != nil {
t.Fatalf("layer upload failed: %v", err)
}
// upload manifest
ctx := context.Background()
manifestService := makeManifestService(t, repository)
manifestDigest, err := manifestService.Put(ctx, im.manifest)
if err != nil {
t.Fatalf("manifest upload failed: %v", err)
}
return manifestDigest
}
func uploadRandomSchema1Image(t *testing.T, repository distribution.Repository) image {
randomLayers, err := testutil.CreateRandomLayers(2)
if err != nil {
t.Fatalf("%v", err)
}
digests := []digest.Digest{}
for digest := range randomLayers {
digests = append(digests, digest)
}
manifest, err := testutil.MakeSchema1Manifest(digests)
if err != nil {
t.Fatalf("%v", err)
}
manifestDigest := uploadImage(t, repository, image{manifest: manifest, layers: randomLayers})
return image{
manifest: manifest,
manifestDigest: manifestDigest,
layers: randomLayers,
}
}
func uploadRandomSchema2Image(t *testing.T, repository distribution.Repository) image {
randomLayers, err := testutil.CreateRandomLayers(2)
if err != nil {
t.Fatalf("%v", err)
}
digests := []digest.Digest{}
for digest := range randomLayers {
digests = append(digests, digest)
}
manifest, err := testutil.MakeSchema2Manifest(repository, digests)
if err != nil {
t.Fatalf("%v", err)
}
manifestDigest := uploadImage(t, repository, image{manifest: manifest, layers: randomLayers})
return image{
manifest: manifest,
manifestDigest: manifestDigest,
layers: randomLayers,
}
}
func TestNoDeletionNoEffect(t *testing.T) {
ctx := context.Background()
inmemoryDriver := inmemory.New()
registry := createRegistry(t, inmemoryDriver)
repo := makeRepository(t, registry, "palailogos")
manifestService, err := repo.Manifests(ctx)
image1 := uploadRandomSchema1Image(t, repo)
image2 := uploadRandomSchema1Image(t, repo)
image3 := uploadRandomSchema2Image(t, repo)
// construct manifestlist for fun.
blobstatter := registry.BlobStatter()
manifestList, err := testutil.MakeManifestList(blobstatter, []digest.Digest{
image1.manifestDigest, image2.manifestDigest})
if err != nil {
t.Fatalf("Failed to make manifest list: %v", err)
}
_, err = manifestService.Put(ctx, manifestList)
if err != nil {
t.Fatalf("Failed to add manifest list: %v", err)
}
// Run GC
err = markAndSweep(inmemoryDriver)
if err != nil {
t.Fatalf("Failed mark and sweep: %v", err)
}
blobs := allBlobs(t, registry)
// the +1 at the end is for the manifestList
// the first +3 at the end for each manifest's blob
// the second +3 at the end for each manifest's signature/config layer
totalBlobCount := len(image1.layers) + len(image2.layers) + len(image3.layers) + 1 + 3 + 3
if len(blobs) != totalBlobCount {
t.Fatalf("Garbage collection affected storage")
}
}
func TestDeletionHasEffect(t *testing.T) {
ctx := context.Background()
inmemoryDriver := inmemory.New()
registry := createRegistry(t, inmemoryDriver)
repo := makeRepository(t, registry, "komnenos")
manifests, err := repo.Manifests(ctx)
image1 := uploadRandomSchema1Image(t, repo)
image2 := uploadRandomSchema1Image(t, repo)
image3 := uploadRandomSchema2Image(t, repo)
manifests.Delete(ctx, image2.manifestDigest)
manifests.Delete(ctx, image3.manifestDigest)
// Run GC
err = markAndSweep(inmemoryDriver)
if err != nil {
t.Fatalf("Failed mark and sweep: %v", err)
}
blobs := allBlobs(t, registry)
// check that the image1 manifest and all the layers are still in blobs
if _, ok := blobs[image1.manifestDigest]; !ok {
t.Fatalf("First manifest is missing")
}
for layer := range image1.layers {
if _, ok := blobs[layer]; !ok {
t.Fatalf("manifest 1 layer is missing: %v", layer)
}
}
// check that image2 and image3 layers are not still around
for layer := range image2.layers {
if _, ok := blobs[layer]; ok {
t.Fatalf("manifest 2 layer is present: %v", layer)
}
}
for layer := range image3.layers {
if _, ok := blobs[layer]; ok {
t.Fatalf("manifest 3 layer is present: %v", layer)
}
}
}
func getAnyKey(digests map[digest.Digest]io.ReadSeeker) (d digest.Digest) {
for d = range digests {
break
}
return
}
func getKeys(digests map[digest.Digest]io.ReadSeeker) (ds []digest.Digest) {
for d := range digests {
ds = append(ds, d)
}
return
}
func TestDeletionWithSharedLayer(t *testing.T) {
ctx := context.Background()
inmemoryDriver := inmemory.New()
registry := createRegistry(t, inmemoryDriver)
repo := makeRepository(t, registry, "tzimiskes")
// Create random layers
randomLayers1, err := testutil.CreateRandomLayers(3)
if err != nil {
t.Fatalf("failed to make layers: %v", err)
}
randomLayers2, err := testutil.CreateRandomLayers(3)
if err != nil {
t.Fatalf("failed to make layers: %v", err)
}
// Upload all layers
err = testutil.UploadBlobs(repo, randomLayers1)
if err != nil {
t.Fatalf("failed to upload layers: %v", err)
}
err = testutil.UploadBlobs(repo, randomLayers2)
if err != nil {
t.Fatalf("failed to upload layers: %v", err)
}
// Construct manifests
manifest1, err := testutil.MakeSchema1Manifest(getKeys(randomLayers1))
if err != nil {
t.Fatalf("failed to make manifest: %v", err)
}
sharedKey := getAnyKey(randomLayers1)
manifest2, err := testutil.MakeSchema2Manifest(repo, append(getKeys(randomLayers2), sharedKey))
if err != nil {
t.Fatalf("failed to make manifest: %v", err)
}
manifestService := makeManifestService(t, repo)
// Upload manifests
_, err = manifestService.Put(ctx, manifest1)
if err != nil {
t.Fatalf("manifest upload failed: %v", err)
}
manifestDigest2, err := manifestService.Put(ctx, manifest2)
if err != nil {
t.Fatalf("manifest upload failed: %v", err)
}
// delete
err = manifestService.Delete(ctx, manifestDigest2)
if err != nil {
t.Fatalf("manifest deletion failed: %v", err)
}
// check that all of the layers in layer 1 are still there
blobs := allBlobs(t, registry)
for dgst := range randomLayers1 {
if _, ok := blobs[dgst]; !ok {
t.Fatalf("random layer 1 blob missing: %v", dgst)
}
}
}
func TestOrphanBlobDeleted(t *testing.T) {
inmemoryDriver := inmemory.New()
registry := createRegistry(t, inmemoryDriver)
repo := makeRepository(t, registry, "michael_z_doukas")
digests, err := testutil.CreateRandomLayers(1)
if err != nil {
t.Fatalf("Failed to create random digest: %v", err)
}
if err = testutil.UploadBlobs(repo, digests); err != nil {
t.Fatalf("Failed to upload blob: %v", err)
}
// formality to create the necessary directories
uploadRandomSchema2Image(t, repo)
// Run GC
err = markAndSweep(inmemoryDriver)
if err != nil {
t.Fatalf("Failed mark and sweep: %v", err)
}
blobs := allBlobs(t, registry)
// check that orphan blob layers are not still around
for dgst := range digests {
if _, ok := blobs[dgst]; ok {
t.Fatalf("Orphan layer is present: %v", dgst)
}
}
}

5
registry/proxy/proxymanifeststore.go
View File

@ -93,8 +93,3 @@ func (pms proxyManifestStore) Put(ctx context.Context, manifest distribution.Man
func (pms proxyManifestStore) Delete(ctx context.Context, dgst digest.Digest) error {
return distribution.ErrUnsupported
}
/*func (pms proxyManifestStore) Enumerate(ctx context.Context, manifests []distribution.Manifest, last distribution.Manifest) (n int, err error) {
return 0, distribution.ErrUnsupported
}
*/

8
registry/proxy/proxyregistry.go
View File

@ -166,6 +166,14 @@ func (pr *proxyingRegistry) Repository(ctx context.Context, name reference.Named
}, nil
}
func (pr *proxyingRegistry) Blobs() distribution.BlobEnumerator {
return pr.embedded.Blobs()
}
func (pr *proxyingRegistry) BlobStatter() distribution.BlobStatter {
return pr.embedded.BlobStatter()
}
// authChallenger encapsulates a request to the upstream to establish credential challenges
type authChallenger interface {
tryEstablishChallenges(context.Context) error

20
registry/registry.go
View File

@ -24,16 +24,12 @@ import (
"github.com/yvasiyarov/gorelic"
)
// Cmd is a cobra command for running the registry.
var Cmd = &cobra.Command{
Use: "registry <config>",
Short: "registry stores and distributes Docker images",
Long: "registry stores and distributes Docker images.",
// ServeCmd is a cobra command for running the registry.
var ServeCmd = &cobra.Command{
Use: "serve <config>",
Short: "`serve` stores and distributes Docker images",
Long: "`serve` stores and distributes Docker images.",
Run: func(cmd *cobra.Command, args []string) {
if showVersion {
version.PrintVersion()
return
}
// setup context
ctx := context.WithVersion(context.Background(), version.Version)
@ -65,12 +61,6 @@ var Cmd = &cobra.Command{
},
}
var showVersion bool
func init() {
Cmd.PersistentFlags().BoolVarP(&showVersion, "version", "v", false, "show the version and exit")
}
// A Registry represents a complete instance of the registry.
// TODO(aaronl): It might make sense for Registry to become an interface.
type Registry struct {

28
registry/root.go Normal file
View File

@ -0,0 +1,28 @@
package registry
import (
"github.com/docker/distribution/version"
"github.com/spf13/cobra"
)
var showVersion bool
func init() {
RootCmd.AddCommand(ServeCmd)
RootCmd.AddCommand(GCCmd)
RootCmd.Flags().BoolVarP(&showVersion, "version", "v", false, "show the version and exit")
}
// RootCmd is the main command for the 'registry' binary.
var RootCmd = &cobra.Command{
Use: "registry",
Short: "`registry`",
Long: "`registry`",
Run: func(cmd *cobra.Command, args []string) {
if showVersion {
version.PrintVersion()
return
}
cmd.Usage()
},
}

32
registry/storage/blobstore.go
View File

@ -1,6 +1,8 @@
package storage
import (
"path"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
@ -85,6 +87,36 @@ func (bs *blobStore) Put(ctx context.Context, mediaType string, p []byte) (distr
}, bs.driver.PutContent(ctx, bp, p)
}
func (bs *blobStore) Enumerate(ctx context.Context, ingester func(dgst digest.Digest) error) error {
specPath, err := pathFor(blobsPathSpec{})
if err != nil {
return err
}
err = Walk(ctx, bs.driver, specPath, func(fileInfo driver.FileInfo) error {
// skip directories
if fileInfo.IsDir() {
return nil
}
currentPath := fileInfo.Path()
// we only want to parse paths that end with /data
_, fileName := path.Split(currentPath)
if fileName != "data" {
return nil
}
digest, err := digestFromPath(currentPath)
if err != nil {
return err
}
return ingester(digest)
})
return err
}
// path returns the canonical path for the blob identified by digest. The blob
// may or may not exist.
func (bs *blobStore) path(dgst digest.Digest) (string, error) {

31
registry/storage/catalog.go
View File

@ -64,3 +64,34 @@ func (reg *registry) Repositories(ctx context.Context, repos []string, last stri
return n, errVal
}
// 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
}
if n == 0 {
break
}
last = repoNameBuffer[n-1]
for i := 0; i < n; i++ {
repoName := repoNameBuffer[i]
err = ingester(repoName)
if err != nil {
return err
}
}
if err == io.EOF {
break
}
}
return nil
}

53
registry/storage/linkedblobstore.go
View File

@ -3,6 +3,7 @@ package storage
import (
"fmt"
"net/http"
"path"
"time"
"github.com/docker/distribution"
@ -37,6 +38,9 @@ type linkedBlobStore struct {
// removed an the blob links folder should be merged. The first entry is
// treated as the "canonical" link location and will be used for writes.
linkPathFns []linkPathFunc
// linkDirectoryPathSpec locates the root directories in which one might find links
linkDirectoryPathSpec pathSpec
}
var _ distribution.BlobStore = &linkedBlobStore{}
@ -236,6 +240,55 @@ func (lbs *linkedBlobStore) Delete(ctx context.Context, dgst digest.Digest) erro
return nil
}
func (lbs *linkedBlobStore) Enumerate(ctx context.Context, ingestor func(digest.Digest) error) error {
rootPath, err := pathFor(lbs.linkDirectoryPathSpec)
if err != nil {
return err
}
err = Walk(ctx, lbs.blobStore.driver, rootPath, func(fileInfo driver.FileInfo) error {
// exit early if directory...
if fileInfo.IsDir() {
return nil
}
filePath := fileInfo.Path()
// check if it's a link
_, fileName := path.Split(filePath)
if fileName != "link" {
return nil
}
// read the digest found in link
digest, err := lbs.blobStore.readlink(ctx, filePath)
if err != nil {
return err
}
// ensure this conforms to the linkPathFns
_, err = lbs.Stat(ctx, digest)
if err != nil {
// we expect this error to occur so we move on
if err == distribution.ErrBlobUnknown {
return nil
}
return err
}
err = ingestor(digest)
if err != nil {
return err
}
return nil
})
if err != nil {
return err
}
return nil
}
func (lbs *linkedBlobStore) mount(ctx context.Context, sourceRepo reference.Named, dgst digest.Digest) (distribution.Descriptor, error) {
repo, err := lbs.registry.Repository(ctx, sourceRepo)
if err != nil {

51
registry/storage/manifeststore.go
View File

@ -2,6 +2,7 @@ package storage
import (
"fmt"
"path"
"encoding/json"
"github.com/docker/distribution"
@ -129,6 +130,52 @@ func (ms *manifestStore) Delete(ctx context.Context, dgst digest.Digest) error {
return ms.blobStore.Delete(ctx, dgst)
}
func (ms *manifestStore) Enumerate(ctx context.Context, manifests []distribution.Manifest, last distribution.Manifest) (n int, err error) {
return 0, distribution.ErrUnsupported
func (ms *manifestStore) Enumerate(ctx context.Context, ingester func(digest.Digest) error) error {
err := ms.blobStore.Enumerate(ctx, func(dgst digest.Digest) error {
err := ingester(dgst)
if err != nil {
return err
}
return nil
})
return err
}
// Only valid for schema1 signed manifests
func (ms *manifestStore) GetSignatures(ctx context.Context, manifestDigest digest.Digest) ([]digest.Digest, error) {
// sanity check that digest refers to a schema1 digest
manifest, err := ms.Get(ctx, manifestDigest)
if err != nil {
return nil, err
}
if _, ok := manifest.(*schema1.SignedManifest); !ok {
return nil, fmt.Errorf("digest %v is not for schema1 manifest", manifestDigest)
}
signaturesPath, err := pathFor(manifestSignaturesPathSpec{
name: ms.repository.Named().Name(),
revision: manifestDigest,
})
if err != nil {
return nil, err
}
signaturesPath = path.Join(signaturesPath, "sha256")
signaturePaths, err := ms.blobStore.driver.List(ctx, signaturesPath)
if err != nil {
return nil, err
}
var digests []digest.Digest
for _, sigPath := range signaturePaths {
sigdigest, err := digest.ParseDigest("sha256:" + path.Base(sigPath))
if err != nil {
// merely found not a digest
continue
}
digests = append(digests, sigdigest)
}
return digests, nil
}

59
registry/storage/paths.go
View File

@ -74,6 +74,7 @@ const (
//
// Manifests:
//
// manifestRevisionsPathSpec: <root>/v2/repositories/<name>/_manifests/revisions/
// manifestRevisionPathSpec: <root>/v2/repositories/<name>/_manifests/revisions/<algorithm>/<hex digest>/
// manifestRevisionLinkPathSpec: <root>/v2/repositories/<name>/_manifests/revisions/<algorithm>/<hex digest>/link
// manifestSignaturesPathSpec: <root>/v2/repositories/<name>/_manifests/revisions/<algorithm>/<hex digest>/signatures/
@ -100,6 +101,7 @@ const (
//
// Blob Store:
//
// blobsPathSpec: <root>/v2/blobs/
// blobPathSpec: <root>/v2/blobs/<algorithm>/<first two hex bytes of digest>/<hex digest>
// blobDataPathSpec: <root>/v2/blobs/<algorithm>/<first two hex bytes of digest>/<hex digest>/data
// blobMediaTypePathSpec: <root>/v2/blobs/<algorithm>/<first two hex bytes of digest>/<hex digest>/data
@ -125,6 +127,9 @@ func pathFor(spec pathSpec) (string, error) {
switch v := spec.(type) {
case manifestRevisionsPathSpec:
return path.Join(append(repoPrefix, v.name, "_manifests", "revisions")...), nil
case manifestRevisionPathSpec:
components, err := digestPathComponents(v.revision, false)
if err != nil {
@ -246,6 +251,17 @@ func pathFor(spec pathSpec) (string, error) {
blobLinkPathComponents := append(repoPrefix, v.name, "_layers")
return path.Join(path.Join(append(blobLinkPathComponents, components...)...), "link"), nil
case blobsPathSpec:
blobsPathPrefix := append(rootPrefix, "blobs")
return path.Join(blobsPathPrefix...), nil
case blobPathSpec:
components, err := digestPathComponents(v.digest, true)
if err != nil {
return "", err
}
blobPathPrefix := append(rootPrefix, "blobs")
return path.Join(append(blobPathPrefix, components...)...), nil
case blobDataPathSpec:
components, err := digestPathComponents(v.digest, true)
if err != nil {
@ -281,6 +297,14 @@ type pathSpec interface {
pathSpec()
}
// manifestRevisionsPathSpec describes the directory path for
// a manifest revision.
type manifestRevisionsPathSpec struct {
name string
}
func (manifestRevisionsPathSpec) pathSpec() {}
// manifestRevisionPathSpec describes the components of the directory path for
// a manifest revision.
type manifestRevisionPathSpec struct {
@ -404,12 +428,17 @@ var blobAlgorithmReplacer = strings.NewReplacer(
";", "/",
)
// // blobPathSpec contains the path for the registry global blob store.
// type blobPathSpec struct {
// digest digest.Digest
// }
// blobsPathSpec contains the path for the blobs directory
type blobsPathSpec struct{}
// func (blobPathSpec) pathSpec() {}
func (blobsPathSpec) pathSpec() {}
// blobPathSpec contains the path for the registry global blob store.
type blobPathSpec struct {
digest digest.Digest
}
func (blobPathSpec) pathSpec() {}
// blobDataPathSpec contains the path for the registry global blob store. For
// now, this contains layer data, exclusively.
@ -491,3 +520,23 @@ func digestPathComponents(dgst digest.Digest, multilevel bool) ([]string, error)
return append(prefix, suffix...), nil
}
// Reconstructs a digest from a path
func digestFromPath(digestPath string) (digest.Digest, error) {
digestPath = strings.TrimSuffix(digestPath, "/data")
dir, hex := path.Split(digestPath)
dir = path.Dir(dir)
dir, next := path.Split(dir)
// next is either the algorithm OR the first two characters in the hex string
var algo string
if next == hex[:2] {
algo = path.Base(dir)
} else {
algo = next
}
dgst := digest.NewDigestFromHex(algo, hex)
return dgst, dgst.Validate()
}

28
registry/storage/paths_test.go
View File

@ -2,6 +2,8 @@ package storage
import (
"testing"
"github.com/docker/distribution/digest"
)
func TestPathMapper(t *testing.T) {
@ -120,3 +122,29 @@ func TestPathMapper(t *testing.T) {
}
}
func TestDigestFromPath(t *testing.T) {
for _, testcase := range []struct {
path string
expected digest.Digest
multilevel bool
err error
}{
{
path: "/docker/registry/v2/blobs/sha256/99/9943fffae777400c0344c58869c4c2619c329ca3ad4df540feda74d291dd7c86/data",
multilevel: true,
expected: "sha256:9943fffae777400c0344c58869c4c2619c329ca3ad4df540feda74d291dd7c86",
err: nil,
},
} {
result, err := digestFromPath(testcase.path)
if err != testcase.err {
t.Fatalf("Unexpected error value %v when we wanted %v", err, testcase.err)
}
if result != testcase.expected {
t.Fatalf("Unexpected result value %v when we wanted %v", result, testcase.expected)
}
}
}

13
registry/storage/registry.go
View File

@ -147,6 +147,14 @@ func (reg *registry) Repository(ctx context.Context, canonicalName reference.Nam
}, nil
}
func (reg *registry) Blobs() distribution.BlobEnumerator {
return reg.blobStore
}
func (reg *registry) BlobStatter() distribution.BlobStatter {
return reg.statter
}
// repository provides name-scoped access to various services.
type repository struct {
*registry
@ -180,6 +188,8 @@ func (repo *repository) Manifests(ctx context.Context, options ...distribution.M
blobLinkPath,
}
manifestDirectoryPathSpec := manifestRevisionsPathSpec{name: repo.name.Name()}
blobStore := &linkedBlobStore{
ctx: ctx,
blobStore: repo.blobStore,
@ -193,7 +203,8 @@ func (repo *repository) Manifests(ctx context.Context, options ...distribution.M
// TODO(stevvooe): linkPath limits this blob store to only
// manifests. This instance cannot be used for blob checks.
linkPathFns: manifestLinkPathFns,
linkPathFns: manifestLinkPathFns,
linkDirectoryPathSpec: manifestDirectoryPathSpec,
}
ms := &manifestStore{

4
registry/storage/vacuum.go
View File

@ -34,11 +34,13 @@ func (v Vacuum) RemoveBlob(dgst string) error {
return err
}
blobPath, err := pathFor(blobDataPathSpec{digest: d})
blobPath, err := pathFor(blobPathSpec{digest: d})
if err != nil {
return err
}
context.GetLogger(v.ctx).Infof("Deleting blob: %s", blobPath)
err = v.driver.Delete(v.ctx, blobPath)
if err != nil {
return err

87
testutil/manifests.go Normal file
View File

@ -0,0 +1,87 @@
package testutil
import (
"fmt"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/manifest"
"github.com/docker/distribution/manifest/manifestlist"
"github.com/docker/distribution/manifest/schema1"
"github.com/docker/distribution/manifest/schema2"
"github.com/docker/libtrust"
)
// MakeManifestList constructs a manifest list out of a list of manifest digests
func MakeManifestList(blobstatter distribution.BlobStatter, manifestDigests []digest.Digest) (*manifestlist.DeserializedManifestList, error) {
ctx := context.Background()
var manifestDescriptors []manifestlist.ManifestDescriptor
for _, manifestDigest := range manifestDigests {
descriptor, err := blobstatter.Stat(ctx, manifestDigest)
if err != nil {
return nil, err
}
platformSpec := manifestlist.PlatformSpec{
Architecture: "atari2600",
OS: "CP/M",
Variant: "ternary",
Features: []string{"VLIW", "superscalaroutoforderdevnull"},
}
manifestDescriptor := manifestlist.ManifestDescriptor{
Descriptor: descriptor,
Platform: platformSpec,
}
manifestDescriptors = append(manifestDescriptors, manifestDescriptor)
}
return manifestlist.FromDescriptors(manifestDescriptors)
}
// MakeSchema1Manifest constructs a schema 1 manifest from a given list of digests and returns
// the digest of the manifest
func MakeSchema1Manifest(digests []digest.Digest) (distribution.Manifest, error) {
manifest := schema1.Manifest{
Versioned: manifest.Versioned{
SchemaVersion: 1,
},
Name: "who",
Tag: "cares",
}
for _, digest := range digests {
manifest.FSLayers = append(manifest.FSLayers, schema1.FSLayer{BlobSum: digest})
manifest.History = append(manifest.History, schema1.History{V1Compatibility: ""})
}
pk, err := libtrust.GenerateECP256PrivateKey()
if err != nil {
return nil, fmt.Errorf("unexpected error generating private key: %v", err)
}
signedManifest, err := schema1.Sign(&manifest, pk)
if err != nil {
return nil, fmt.Errorf("error signing manifest: %v", err)
}
return signedManifest, nil
}
// MakeSchema2Manifest constructs a schema 2 manifest from a given list of digests and returns
// the digest of the manifest
func MakeSchema2Manifest(repository distribution.Repository, digests []digest.Digest) (distribution.Manifest, error) {
ctx := context.Background()
blobStore := repository.Blobs(ctx)
builder := schema2.NewManifestBuilder(blobStore, []byte{})
for _, digest := range digests {
builder.AppendReference(distribution.Descriptor{Digest: digest})
}
manifest, err := builder.Build(ctx)
if err != nil {
return nil, fmt.Errorf("unexpected error generating manifest: %v", err)
}
return manifest, nil
}

38
testutil/tarfile.go
View File

@ -9,6 +9,8 @@ import (
mrand "math/rand"
"time"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
)
@ -76,3 +78,39 @@ func CreateRandomTarFile() (rs io.ReadSeeker, dgst digest.Digest, err error) {
return bytes.NewReader(target.Bytes()), dgst, nil
}
// CreateRandomLayers returns a map of n digests. We don't particularly care
// about the order of said digests (since they're all random anyway).
func CreateRandomLayers(n int) (map[digest.Digest]io.ReadSeeker, error) {
digestMap := map[digest.Digest]io.ReadSeeker{}
for i := 0; i < n; i++ {
rs, ds, err := CreateRandomTarFile()
if err != nil {
return nil, fmt.Errorf("unexpected error generating test layer file: %v", err)
}
dgst := digest.Digest(ds)
digestMap[dgst] = rs
}
return digestMap, nil
}
// UploadBlobs lets you upload blobs to a repository
func UploadBlobs(repository distribution.Repository, layers map[digest.Digest]io.ReadSeeker) error {
ctx := context.Background()
for digest, rs := range layers {
wr, err := repository.Blobs(ctx).Create(ctx)
if err != nil {
return fmt.Errorf("unexpected error creating upload: %v", err)
}
if _, err := io.Copy(wr, rs); err != nil {
return fmt.Errorf("unexpected error copying to upload: %v", err)
}
if _, err := wr.Commit(ctx, distribution.Descriptor{Digest: digest}); err != nil {
return fmt.Errorf("unexpected error committinng upload: %v", err)
}
}
return nil
}