feat(grafana_agent): add prom rules

!4

templates/PrometheusRule-grafana-agent.yaml

@@ -9,7 +9,7 @@ metadata:
     app.kubernetes.io/version: {{ $.Chart.Version }}
     app.kubernetes.io/managed-by: {{ $.Release.Service }}
     prometheus: k8s
-    role: grafana-agent-promtail
+    role: alert-rules
   name: grafana-agent
   namespace: {{ .Values.nfc_monitoring.prometheus.namespace }}
 spec:
@@ -21,3 +21,87 @@ spec:
     - expr: |
         agent_build_info
       record: promtail_build_info
+  - name: promtail_rules
+    rules:
+    - expr: histogram_quantile(0.99, sum(rate(promtail_request_duration_seconds_bucket[1m]))
+        by (le, job))
+      record: job:promtail_request_duration_seconds:99quantile
+    - expr: histogram_quantile(0.50, sum(rate(promtail_request_duration_seconds_bucket[1m]))
+        by (le, job))
+      record: job:promtail_request_duration_seconds:50quantile
+    - expr: sum(rate(promtail_request_duration_seconds_sum[1m])) by (job) / sum(rate(promtail_request_duration_seconds_count[1m]))
+        by (job)
+      record: job:promtail_request_duration_seconds:avg
+    - expr: sum(rate(promtail_request_duration_seconds_bucket[1m])) by (le, job)
+      record: job:promtail_request_duration_seconds_bucket:sum_rate
+    - expr: sum(rate(promtail_request_duration_seconds_sum[1m])) by (job)
+      record: job:promtail_request_duration_seconds_sum:sum_rate
+    - expr: sum(rate(promtail_request_duration_seconds_count[1m])) by (job)
+      record: job:promtail_request_duration_seconds_count:sum_rate
+    - expr: histogram_quantile(0.99, sum(rate(promtail_request_duration_seconds_bucket[1m]))
+        by (le, job, namespace))
+      record: job_namespace:promtail_request_duration_seconds:99quantile
+    - expr: histogram_quantile(0.50, sum(rate(promtail_request_duration_seconds_bucket[1m]))
+        by (le, job, namespace))
+      record: job_namespace:promtail_request_duration_seconds:50quantile
+    - expr: sum(rate(promtail_request_duration_seconds_sum[1m])) by (job, namespace)
+        / sum(rate(promtail_request_duration_seconds_count[1m])) by (job, namespace)
+      record: job_namespace:promtail_request_duration_seconds:avg
+    - expr: sum(rate(promtail_request_duration_seconds_bucket[1m])) by (le, job, namespace)
+      record: job_namespace:promtail_request_duration_seconds_bucket:sum_rate
+    - expr: sum(rate(promtail_request_duration_seconds_sum[1m])) by (job, namespace)
+      record: job_namespace:promtail_request_duration_seconds_sum:sum_rate
+    - expr: sum(rate(promtail_request_duration_seconds_count[1m])) by (job, namespace)
+      record: job_namespace:promtail_request_duration_seconds_count:sum_rate
+    - expr: histogram_quantile(0.99, sum(rate(promtail_request_duration_seconds_bucket[1m]))
+        by (le, job, status_code, namespace))
+      record: job_status_code_namespace:promtail_request_duration_seconds:99quantile
+    - expr: histogram_quantile(0.50, sum(rate(promtail_request_duration_seconds_bucket[1m]))
+        by (le, job, status_code, namespace))
+      record: job_status_code_namespace:promtail_request_duration_seconds:50quantile
+    - expr: sum(rate(promtail_request_duration_seconds_sum[1m])) by (job, status_code,
+        namespace) / sum(rate(promtail_request_duration_seconds_count[1m])) by (job,
+        status_code, namespace)
+      record: job_status_code_namespace:promtail_request_duration_seconds:avg
+    - expr: sum(rate(promtail_request_duration_seconds_bucket[1m])) by (le, job, status_code,
+        namespace)
+      record: job_status_code_namespace:promtail_request_duration_seconds_bucket:sum_rate
+    - expr: sum(rate(promtail_request_duration_seconds_sum[1m])) by (job, status_code,
+        namespace)
+      record: job_status_code_namespace:promtail_request_duration_seconds_sum:sum_rate
+    - expr: sum(rate(promtail_request_duration_seconds_count[1m])) by (job, status_code,
+        namespace)
+      record: job_status_code_namespace:promtail_request_duration_seconds_count:sum_rate
+
+  - name: promtail_alerts
+    rules:
+    - alert: PromtailRequestsErrors
+      annotations:
+        message: |
+          {{ `{{` }} $labels.job }} {{ `{{` }} $labels.route }} is experiencing {{ `{{` }} printf "%.2f" $value }}% errors.
+      expr: |
+        100 * sum(rate(promtail_request_duration_seconds_count{status_code=~"5..|failed"}[1m])) by (namespace, job, route, instance)
+          /
+        sum(rate(promtail_request_duration_seconds_count[1m])) by (namespace, job, route, instance)
+          > 10
+      for: 15m
+      labels:
+        severity: critical
+    - alert: PromtailRequestLatency
+      annotations:
+        message: |
+          {{ `{{` }} $labels.job }} {{ `{{` }} $labels.route }} is experiencing {{ `{{` }} printf "%.2f" $value }}s 99th percentile latency.
+      expr: |
+        job_status_code_namespace:promtail_request_duration_seconds:99quantile > 1
+      for: 15m
+      labels:
+        severity: critical
+    - alert: PromtailFileMissing
+      annotations:
+        message: |
+          {{ `{{` }} $labels.instance }} {{ `{{` }} $labels.job }} {{ `{{` }} $labels.path }} matches the glob but is not being tailed.
+      expr: |
+        promtail_file_bytes_total unless promtail_read_bytes_total
+      for: 15m
+      labels:
+        severity: warning