azureblob: allow remote emulator (azurite) - fixes #6290

backend/azureblob/azureblob.go

@@ -600,7 +600,11 @@ func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, e
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse credentials: %w", err)
 		}
-		u, err = url.Parse(emulatorBlobEndpoint)
+		var actualEmulatorEndpoint = emulatorBlobEndpoint
+		if opt.Endpoint != "" {
+			actualEmulatorEndpoint = opt.Endpoint
+		}
+		u, err = url.Parse(actualEmulatorEndpoint)
 		if err != nil {
 			return nil, fmt.Errorf("failed to make azure storage url from account and endpoint: %w", err)
 		}

docs/content/azureblob.md

@@ -526,7 +526,8 @@ See [List of backends that do not support rclone about](https://rclone.org/overv
 
 ## Azure Storage Emulator Support
 
-You can test rclone with storage emulator locally, to do this make sure azure storage emulator
-installed locally and set up a new remote with `rclone config` follow instructions described in
-introduction, set `use_emulator` config as `true`, you do not need to provide default account name
-or key if using emulator.
+You can run rclone with storage emulator (usually _azurite_).
+
+To do this, just set up a new remote with `rclone config` following instructions described in introduction and set `use_emulator` config as `true`. You do not need to provide default account name neither an account key.
+
+Also, if you want to access a storage emulator instance running on a different machine, you can override _Endpoint_ parameter in advanced settings, setting it to `http(s)://<host>:<port>/devstoreaccount1` (e.g. `http://10.254.2.5:10000/devstoreaccount1`).