[core] Add monitoring in raylet for resouce view

src/ray/raylet/scheduling/cluster_lease_manager.cc

@@ -412,6 +412,7 @@ const RayLease *ClusterLeaseManager::AnyPendingLeasesForResourceAcquisition(
 void ClusterLeaseManager::RecordMetrics() const {
   internal_stats_.RecordMetrics();
   cluster_resource_scheduler_.GetLocalResourceManager().RecordMetrics();
+  cluster_resource_scheduler_.GetClusterResourceManager().RecordMetrics();
 }
 
 std::string ClusterLeaseManager::DebugStr() const {

src/ray/raylet/scheduling/cluster_resource_manager.cc

@@ -20,6 +20,7 @@
 
 #include "ray/common/grpc_util.h"
 #include "ray/common/ray_config.h"
+#include "ray/stats/metric_defs.h"
 
 namespace ray {
 
@@ -302,4 +303,8 @@ void ClusterResourceManager::SetNodeLabels(
   it->second.GetMutableLocalView()->labels = std::move(labels);
 }
 
+void ClusterResourceManager::RecordMetrics() const {
+  ray::stats::STATS_local_resource_view_node_count.Record(nodes_.size());
+}
+
 }  // namespace ray

src/ray/raylet/scheduling/cluster_resource_manager.h

@@ -135,6 +135,9 @@ class ClusterResourceManager {
   std::string DebugString(
       std::optional<size_t> max_num_nodes_to_include = std::nullopt) const;
 
+  /// Record metrics for the cluster resource manager.
+  void RecordMetrics() const;
+
   BundleLocationIndex &GetBundleLocationIndex();
 
   void SetNodeLabels(const scheduling::NodeID &node_id,

src/ray/stats/metric_defs.cc

@@ -117,6 +117,11 @@ DEFINE_stats(scheduler_failed_worker_startup_total,
              ("Reason"),
              (),
              ray::stats::GAUGE);
+DEFINE_stats(local_resource_view_node_count,
+             "Number of nodes tracked locally by the reporting raylet.",
+             (),
+             (),
+             ray::stats::GAUGE);
 
 /// Local Object Manager
 DEFINE_stats(

src/ray/stats/metric_defs.h

@@ -55,6 +55,7 @@ DECLARE_stats(operation_active_count);
 DECLARE_stats(scheduler_failed_worker_startup_total);
 DECLARE_stats(scheduler_tasks);
 DECLARE_stats(scheduler_unscheduleable_tasks);
+DECLARE_stats(local_resource_view_node_count);
 
 /// Raylet Resource Manager
 DECLARE_stats(resources);