feat: add SoleTenantConfig API

PiperOrigin-RevId: 536516473

google/container/v1/cluster_service.proto

@@ -816,6 +816,9 @@ message NodeConfig {
   // Parameters for the node ephemeral storage using Local SSDs.
   // If unspecified, ephemeral storage is backed by the boot disk.
   EphemeralStorageLocalSsdConfig ephemeral_storage_local_ssd_config = 41;
+
+  // Parameters for node pools to be backed by shared sole tenant node groups.
+  SoleTenantConfig sole_tenant_config = 42;
 }
 
 // Specifies options for controlling advanced machine features.
@@ -980,6 +983,40 @@ message ReservationAffinity {
   repeated string values = 3;
 }
 
+// SoleTenantConfig contains the NodeAffinities to specify what shared sole
+// tenant node groups should back the node pool.
+message SoleTenantConfig {
+  // Specifies the NodeAffinity key, values, and affinity operator according to
+  // [shared sole tenant node group
+  // affinities](https://cloud.google.com/compute/docs/nodes/sole-tenant-nodes#node_affinity_and_anti-affinity).
+  message NodeAffinity {
+    // Operator allows user to specify affinity or anti-affinity for the
+    // given key values.
+    enum Operator {
+      // Invalid or unspecified affinity operator.
+      OPERATOR_UNSPECIFIED = 0;
+
+      // Affinity operator.
+      IN = 1;
+
+      // Anti-affinity operator.
+      NOT_IN = 2;
+    }
+
+    // Key for NodeAffinity.
+    string key = 1;
+
+    // Operator for NodeAffinity.
+    Operator operator = 2;
+
+    // Values for NodeAffinity.
+    repeated string values = 3;
+  }
+
+  // NodeAffinities used to match to a shared sole tenant node group.
+  repeated NodeAffinity node_affinities = 1;
+}
+
 // Kubernetes taint is composed of three fields: key, value, and effect. Effect
 // can only be one of three types:  NoSchedule, PreferNoSchedule or NoExecute.
 //