feat: Add option to enable nested virtualization if available

Google APIs · copybara-github · commit 185c73c12988 · 2025-08-15T10:14:41.000-07:00
docs: Update comments for `machine_type` and `disk_size_gb`

PiperOrigin-RevId: 795519165
diff --git a/google/devtools/cloudbuild/v1/cloudbuild.proto b/google/devtools/cloudbuild/v1/cloudbuild.proto
@@ -2698,18 +2698,23 @@ message PrivatePoolV1Config {
   // Defines the configuration to be used for creating workers in
   // the pool.
   message WorkerConfig {
-    // Machine type of a worker, such as `e2-medium`.
+    // Optional. Machine type of a worker, such as `e2-medium`.
     // See [Worker pool config
     // file](https://cloud.google.com/build/docs/private-pools/worker-pool-config-file-schema).
     // If left blank, Cloud Build will use a sensible default.
-    string machine_type = 1;
+    string machine_type = 1 [(google.api.field_behavior) = OPTIONAL];
 
     // Size of the disk attached to the worker, in GB.
     // See [Worker pool config
     // file](https://cloud.google.com/build/docs/private-pools/worker-pool-config-file-schema).
-    // Specify a value of up to 2000. If `0` is specified, Cloud Build will use
+    // Specify a value of up to 4000. If `0` is specified, Cloud Build will use
     // a standard disk size.
     int64 disk_size_gb = 2;
+
+    // Optional. Enable nested virtualization on the worker, if supported by the
+    // machine type. By default, nested virtualization is disabled.
+    optional bool enable_nested_virtualization = 3
+        [(google.api.field_behavior) = OPTIONAL];
   }
 
   // Defines the network configuration for the pool.
