From 86a0fa84ca6662ca931182880523c0b87f617f73 Mon Sep 17 00:00:00 2001
From: TheSiahxyz <164138827+TheSiahxyz@users.noreply.github.com>
Date: Thu, 2 Apr 2026 16:07:20 +0900
Subject: fix: add session lock in StockSelector, remove unused
 HEALTH_PORT_OFFSET, lint fixes

- Add asyncio.Lock to StockSelector._ensure_session() to prevent race condition
- Remove unused HEALTH_PORT_OFFSET constant from news-collector
- Auto-fix import sorting and formatting from ruff
---
 monitoring/prometheus/alert_rules.yml | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 monitoring/prometheus/alert_rules.yml

(limited to 'monitoring/prometheus')

diff --git a/monitoring/prometheus/alert_rules.yml b/monitoring/prometheus/alert_rules.yml
new file mode 100644
index 0000000..aca2f1c
--- /dev/null
+++ b/monitoring/prometheus/alert_rules.yml
@@ -0,0 +1,29 @@
+groups:
+  - name: trading-platform
+    rules:
+      - alert: ServiceDown
+        expr: up == 0
+        for: 1m
+        labels:
+          severity: critical
+        annotations:
+          summary: "Service {{ $labels.job }} is down"
+          description: "{{ $labels.instance }} has been unreachable for 1 minute."
+
+      - alert: HighErrorRate
+        expr: rate(errors_total[5m]) > 10
+        for: 2m
+        labels:
+          severity: warning
+        annotations:
+          summary: "High error rate on {{ $labels.job }}"
+          description: "Error rate is {{ $value }} errors/sec over 5 minutes."
+
+      - alert: HighProcessingLatency
+        expr: histogram_quantile(0.95, rate(processing_seconds_bucket[5m])) > 5
+        for: 5m
+        labels:
+          severity: warning
+        annotations:
+          summary: "High p95 latency on {{ $labels.job }}"
+          description: "95th percentile processing time is {{ $value }}s."
-- 
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