Mark feature as experimental

csi.proto

@@ -12,6 +12,23 @@ extend google.protobuf.FieldOptions {
   // Indicates that a field MAY contain information that is sensitive
   // and MUST be treated as such (e.g. not logged).
   bool csi_secret = 1059;
+
+  // Indicates that this field is OPTIONAL and part of an experimental
+  // API that may be deprecated and eventually removed between minor
+  // releases.
+  bool alpha_field = 1060;
+}
+extend google.protobuf.MessageOptions {
+  // Indicates that this message is OPTIONAL and part of an experimental
+  // API that may be deprecated and eventually removed between minor
+  // releases.
+  bool alpha_message = 1060;
+}
+extend google.protobuf.MethodOptions {
+  // Indicates that this method is OPTIONAL and part of an experimental
+  // API that may be deprecated and eventually removed between minor
+  // releases.
+  bool alpha_method = 1060;
 }
 service Identity {
   rpc GetPluginInfo(GetPluginInfoRequest)
@@ -62,7 +79,9 @@ service Controller {
     returns (ControllerExpandVolumeResponse) {}
 
   rpc GetVolume (GetVolumeRequest)
-    returns (GetVolumeResponse) {}
+    returns (GetVolumeResponse) {
+        option (alpha_method) = true;
+    }
 }
 
 service Node {
@@ -820,7 +839,7 @@ message ListVolumesResponse {
     // This field MUST be specified if the
     // LIST_VOLUMES_VOLUME_HEALTH controller capability is supported.
     // This field is OPTIONAL.
-    repeated VolumeHealth volume_health = 2;
+    repeated VolumeHealth volume_health = 2 [(alpha_field) = true];
   }
 
   message Entry {
@@ -844,17 +863,21 @@ message ListVolumesResponse {
   string next_token = 2;
 }
 message GetVolumeRequest {
+  option (alpha_message) = true;
+
   // Identity information for a specific volume. This field is
   // REQUIRED. GetVolume will return with current volume information.
   string volume_id = 1;
 }
 
 message GetVolumeResponse {
+  option (alpha_message) = true;
+
   message VolumeStatus{
     // volume_health shows error conditions reported by the SP.
     // This field MUST be specified if the
     // VOLUME_HEALTH controller capability is supported.
-    repeated VolumeHealth volume_health = 1;
+    repeated VolumeHealth volume_health = 1 [(alpha_field) = true];
   }
 
   // This field is REQUIRED
@@ -1276,7 +1299,7 @@ message NodeGetVolumeStatsResponse {
   // This field is OPTIONAL.
   repeated VolumeUsage usage = 1;
   // This field is OPTIONAL.
-  repeated VolumeHealth volume_health = 2;
+  repeated VolumeHealth volume_health = 2 [(alpha_field) = true];
 }
 
 message VolumeUsage {
@@ -1302,6 +1325,8 @@ message VolumeUsage {
 }
 
 message VolumeHealth {
+  option (alpha_message) = true;
+
   enum Condition {
     // Volume health condition is unknown; treat it as healthy.
     UNKNOWN = 0;