From e6ed60548397627bf10f561f9438201dbba0a36e Mon Sep 17 00:00:00 2001
From: Azat Bahawi <azat@bahawi.net>
Date: Sun, 21 Apr 2024 02:15:42 +0300
Subject: 2024-04-21

---
 modules/monitoring/rules/nginx.yaml | 60 +++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 modules/monitoring/rules/nginx.yaml

(limited to 'modules/monitoring/rules/nginx.yaml')

diff --git a/modules/monitoring/rules/nginx.yaml b/modules/monitoring/rules/nginx.yaml
new file mode 100644
index 0000000..f00d372
--- /dev/null
+++ b/modules/monitoring/rules/nginx.yaml
@@ -0,0 +1,60 @@
+---
+groups:
+  - name: Nginx
+
+    rules:
+      - alert: NginxHighHttp4xxErrorRate
+        expr: >-
+          sum(rate(nginx_http_requests_total{status=~"^4.."}[1m]))
+          /
+          sum(rate(nginx_http_requests_total[1m])) * 100
+          > 5
+        for: 1m
+        labels:
+          severity: critical
+        annotations:
+          summary: NGINX high HTTP 4xx error rate at {{ $labels.instance }}.
+          description: |-
+            Too many HTTP requests with a 4xx status code.
+
+            VALUE = {{ $value }}
+            LABELS = {{ $labels }}
+
+      - alert: NginxHighHttp5xxErrorRate
+        expr: >-
+          sum(rate(nginx_http_requests_total{status=~"^5.."}[1m]))
+          /
+          sum(rate(nginx_http_requests_total[1m])) * 100
+          > 5
+        for: 1m
+        labels:
+          severity: critical
+        annotations:
+          summary: NGINX high HTTP 5xx error rate at {{ $labels.instance }}.
+          description: |-
+            Too many HTTP requests with a 5xx status code.
+
+            VALUE = {{ $value }}
+            LABELS = {{ $labels }}
+
+      - alert: NginxLatencyHigh
+        expr: >-
+          histogram_quantile(
+            0.99,
+            sum(
+              rate(
+                nginx_http_request_duration_seconds_bucket[2m]
+              )
+            ) by (host, node)
+          )
+          > 3
+        for: 2m
+        labels:
+          severity: warning
+        annotations:
+          summary: NGINX high latency at {{ $labels.instance }}.
+          description: |-
+            NGINX 99% of latency spikes is higher than 3 seconds.
+
+            VALUE = {{ $value }}
+            LABELS = {{ $labels }}
-- 
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