From 3541b947f190a14ca1356ececa027c696597014b Mon Sep 17 00:00:00 2001
From: Flavien David <flavien.david74@gmail.com>
Date: Mon, 14 Oct 2024 08:43:23 +0200
Subject: [PATCH] Improve Prometheus regexp (#8039)

---
 alerting/temporal/src/qdrant/index.ts | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/alerting/temporal/src/qdrant/index.ts b/alerting/temporal/src/qdrant/index.ts
index 5a9349375aad..840599c940e3 100644
--- a/alerting/temporal/src/qdrant/index.ts
+++ b/alerting/temporal/src/qdrant/index.ts
@@ -53,8 +53,15 @@ const NODE_AND_CLUSTER_REGEXP = /https:\/\/(node-\d+)-(.+)\:\d+/;
  */
 
 // Example: "grpc_responses_max_duration_seconds{endpoint="/qdrant.Points/Search"} 3.701747".
-const prometheusMetricsRegexp = /(\w+)(?:\{([^}]*)\})? (\d+(\.\d+)?)/;
-const supportedPrometheusLabels = ["endpoint", "le"] as const;
+// Support nested curly braces in labels.
+const prometheusMetricsRegexp =
+  /(\w+)(?:\{([^{}]*(?:\{[^{}]*\}[^{}]*)*)\})? (\d+(?:\.\d+)?)/;
+const supportedPrometheusLabels = [
+  "endpoint",
+  "le",
+  "method",
+  "status",
+] as const;
 type SupportedPrometheusLabels = (typeof supportedPrometheusLabels)[number];
 
 function isSupportedPrometheusLabel(
@@ -82,6 +89,7 @@ function extractMetricDetails(line: string) {
 
     return { name, labels, value };
   }
+
   return null;
 }