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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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25
docs/handlers/app.go
View file

@ -106,7 +106,8 @@ func NewApp(ctx context.Context, configuration configuration.Configuration) *App
app.configureRedis(&configuration)
app.configureLogHook(&configuration)
deleteEnabled := false
// configure deletion
var deleteEnabled bool
if d, ok := configuration.Storage["delete"]; ok {
e, ok := d["enabled"]
if ok {
@ -116,6 +117,22 @@ func NewApp(ctx context.Context, configuration configuration.Configuration) *App
}
}
// configure redirects
var redirectDisabled bool
if redirectConfig, ok := configuration.Storage["redirect"]; ok {
v := redirectConfig["disable"]
switch v := v.(type) {
case bool:
redirectDisabled = v
default:
panic(fmt.Sprintf("invalid type for redirect config: %#v", redirectConfig))
}
if redirectDisabled {
ctxu.GetLogger(app).Infof("backend redirection disabled")
}
}
// configure storage caches
if cc, ok := configuration.Storage["cache"]; ok {
v, ok := cc["blobdescriptor"]
@ -129,10 +146,10 @@ func NewApp(ctx context.Context, configuration configuration.Configuration) *App
if app.redis == nil {
panic("redis configuration required to use for layerinfo cache")
}
app.registry = storage.NewRegistryWithDriver(app, app.driver, rediscache.NewRedisBlobDescriptorCacheProvider(app.redis), deleteEnabled)
app.registry = storage.NewRegistryWithDriver(app, app.driver, rediscache.NewRedisBlobDescriptorCacheProvider(app.redis), deleteEnabled, !redirectDisabled)
ctxu.GetLogger(app).Infof("using redis blob descriptor cache")
case "inmemory":
app.registry = storage.NewRegistryWithDriver(app, app.driver, memorycache.NewInMemoryBlobDescriptorCacheProvider(), deleteEnabled)
app.registry = storage.NewRegistryWithDriver(app, app.driver, memorycache.NewInMemoryBlobDescriptorCacheProvider(), deleteEnabled, !redirectDisabled)
ctxu.GetLogger(app).Infof("using inmemory blob descriptor cache")
default:
if v != "" {
@ -143,7 +160,7 @@ func NewApp(ctx context.Context, configuration configuration.Configuration) *App
if app.registry == nil {
// configure the registry if no cache section is available.
app.registry = storage.NewRegistryWithDriver(app.Context, app.driver, nil, deleteEnabled)
app.registry = storage.NewRegistryWithDriver(app.Context, app.driver, nil, deleteEnabled, !redirectDisabled)
}
app.registry, err = applyRegistryMiddleware(app.registry, configuration.Middleware["registry"])