From 9a90b9ebcfee5d163683f0b0e58433ab7b45d2dd Mon Sep 17 00:00:00 2001
From: Hailong Wen <hailongwen@google.com>
Date: Thu, 13 Nov 2025 08:07:19 +0000
Subject: [PATCH] feat: Add grpc.xds.resource_type label to xDS client metrics

---
 spanner/metrics.go                     | 1 +
 spanner/metrics_monitoring_exporter.go | 1 +
 2 files changed, 2 insertions(+)

diff --git a/spanner/metrics.go b/spanner/metrics.go
index 4a8ae40f8073..a826ba335ac5 100644
--- a/spanner/metrics.go
+++ b/spanner/metrics.go
@@ -68,6 +68,7 @@ const (
 	metricLabelKeyDirectPathUsed        = "directpath_used"
 	metricLabelKeyGRPCLBPickResult      = "grpc.lb.pick_result"
 	metricLabelKeyGRPCLBDataPlaneTarget = "grpc.lb.rls.data_plane_target"
+	metricLabelKeyGRPCXDSResourceType   = "grpc.xds.resource_type"
 
 	// Metric names
 	metricNameOperationLatencies        = "operation_latencies"
diff --git a/spanner/metrics_monitoring_exporter.go b/spanner/metrics_monitoring_exporter.go
index 498c1c844f93..390e857c2183 100644
--- a/spanner/metrics_monitoring_exporter.go
+++ b/spanner/metrics_monitoring_exporter.go
@@ -66,6 +66,7 @@ var (
 	allowedMetricLabels = map[string]bool{
 		metricLabelKeyGRPCLBPickResult:      true,
 		metricLabelKeyGRPCLBDataPlaneTarget: true,
+		metricLabelKeyGRPCXDSResourceType:   true,
 		metricLabelKeyClientUID:             true,
 		metricLabelKeyClientName:            true,
 		metricLabelKeyDatabase:              true,