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-rw-r--r--tools/nixery/storage/gcs.go4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/nixery/storage/gcs.go b/tools/nixery/storage/gcs.go
index eac34461af76..a4bb4ba31f67 100644
--- a/tools/nixery/storage/gcs.go
+++ b/tools/nixery/storage/gcs.go
@@ -222,6 +222,10 @@ func signingOptsFromEnv() (*storage.SignedURLOptions, error) {
 // Signing the URL allows unauthenticated clients to retrieve objects from the
 // bucket.
 //
+// In case signing is not configured, a redirect to storage.googleapis.com is
+// issued, which means the underlying bucket objects need to be publicly
+// accessible.
+//
 // The Docker client is known to follow redirects, but this might not be true
 // for all other registry clients.
 func (b *GCSBackend) constructLayerUrl(digest string) (string, error) {