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Allow disabling of starage driver redirects

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Storage drivers can implement a method called URLFor which can return a direct
url for a given path. The functionality allows the registry to direct clients
to download content directly from the backend storage. This is commonly used
with s3 and cloudfront. Under certain conditions, such as when the registry is
not local to the backend, these redirects can hurt performance and waste
incoming bandwidth on pulls. This feature addition allows one to disable this
feature, if required.

Signed-off-by: Stephen J Day <stephen.day@docker.com>

Conflicts:
	configuration/configuration.go
	registry/handlers/app.go
	registry/storage/catalog_test.go
	registry/storage/manifeststore_test.go
	registry/storage/registry.go
This commit is contained in:
Stephen J Day 2015-07-23 23:16:27 -07:00
parent a6ef6c0dc3
commit 29a810b68b
7 changed files with 51 additions and 23 deletions
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16
docs/storage/registry.go
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@ -20,9 +20,12 @@ type registry struct {
// NewRegistryWithDriver creates a new registry instance from the provided
// driver. The resulting registry may be shared by multiple goroutines but is
// cheap to allocate.
func NewRegistryWithDriver(ctx context.Context, driver storagedriver.StorageDriver, blobDescriptorCacheProvider cache.BlobDescriptorCacheProvider, deleteEnabled bool) distribution.Namespace {
// cheap to allocate. If redirect is true, the backend blob server will
// attempt to use (StorageDriver).URLFor to serve all blobs.
//
// TODO(stevvooe): This function signature is getting out of hand. Move to
// functional options for instance configuration.
func NewRegistryWithDriver(ctx context.Context, driver storagedriver.StorageDriver, blobDescriptorCacheProvider cache.BlobDescriptorCacheProvider, deleteEnabled bool, redirect bool) distribution.Namespace {
// create global statter, with cache.
var statter distribution.BlobDescriptorService = &blobStatter{
driver: driver,
@ -42,9 +45,10 @@ func NewRegistryWithDriver(ctx context.Context, driver storagedriver.StorageDriv
return &registry{
blobStore: bs,
blobServer: &blobServer{
driver: driver,
statter: statter,
pathFn: bs.path,
driver: driver,
statter: statter,
pathFn: bs.path,
redirect: redirect,
},
blobDescriptorCacheProvider: blobDescriptorCacheProvider,
deleteEnabled: deleteEnabled,