Add Openstack Swift storage driver

Signed-off-by: Sylvain Baubeau <sbaubeau@redhat.com>

cmd/registry-storagedriver-swift/main.go

@@ -0,0 +1,32 @@
+// +build ignore
+
+package main
+
+import (
+	"encoding/json"
+	"os"
+
+	"github.com/Sirupsen/logrus"
+
+	"github.com/docker/distribution/registry/storage/driver/ipc"
+	"github.com/docker/distribution/registry/storage/driver/swift"
+)
+
+// An out-of-process Swift driver, intended to be run by ipc.NewDriverClient
+func main() {
+	parametersBytes := []byte(os.Args[1])
+	var parameters map[string]string
+	err := json.Unmarshal(parametersBytes, &parameters)
+	if err != nil {
+		panic(err)
+	}
+
+	driver, err := swift.FromParameters(parameters)
+	if err != nil {
+		panic(err)
+	}
+
+	if err := ipc.StorageDriverServer(driver); err != nil {
+		logrus.Fatalln(err)
+	}
+}

cmd/registry/main.go

@@ -28,6 +28,7 @@ import (
 	_ "github.com/docker/distribution/registry/storage/driver/inmemory"
 	_ "github.com/docker/distribution/registry/storage/driver/middleware/cloudfront"
 	_ "github.com/docker/distribution/registry/storage/driver/s3"
+	_ "github.com/docker/distribution/registry/storage/driver/swift"
 	"github.com/docker/distribution/version"
 	gorhandlers "github.com/gorilla/handlers"
 	"github.com/yvasiyarov/gorelic"