2023-03-23

1 files changed, 52 insertions, 0 deletions

diff --git a/modules/nixos/monitoring/rules/nginx.yaml b/modules/nixos/monitoring/rules/nginx.yaml
new file mode 100644
index 0000000..59229a8
--- /dev/null
+++ b/modules/nixos/monitoring/rules/nginx.yaml
@@ -0,0 +1,52 @@
+---
+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 (instance {{ $labels.instance }})
+          description: |-
+            Too many HTTP requests with status 4xx (> 5%).
+
+              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 (instance {{ $labels.instance }})
+          description: |-
+            Too many HTTP requests with status 5xx (> 5%).
+
+              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 (instance {{ $labels.instance }})
+          description: |-
+            NGINX 99% latency is higher than 3 seconds.
+
+              VALUE = {{ $value }}
+              LABELS = {{ $labels }}