feat: add service monitor and error alter integration guideline

docs/Service Monitor and Error Alter Integration Guideline.md

@@ -1,32 +1,91 @@
-# Prometheus Alter Rule Config
+# 1. Prometheus Alert Rule Configuration
 
-Add `prometheusrule.yaml` to `<helm-pkg>/templates`.
-see 
-```
+## 1.1. Add `prometheusrule.yaml` to `<helm-pkg>/templates`.
+
+Example:
+
+> Update metrics to your service name, see freeleaps-ops/freeleaps/helm-pkg/metrics
+```yaml
 {{- /*
 Copyright Broadcom, Inc. All Rights Reserved.
 SPDX-License-Identifier: APACHE-2.0
 */}}
 
-{{- if and .Values.metrics.enabled .Values.metrics.prometheusRule.enabled }}
+{{- if .Values.metrics.prometheusRule.enabled }}
 apiVersion: monitoring.coreos.com/v1
 kind: PrometheusRule
 metadata:
-  name: {{ include "common.names.fullname" . }}
-  namespace: {{ default (include "common.names.namespace" .) .Values.metrics.prometheusRule.namespace | quote}}
-  labels: {{- include "common.labels.standard" ( dict "customLabels" .Values.commonLabels "context" $ ) | nindent 4 }}
-    {{- if .Values.metrics.prometheusRule.additionalLabels }}
-    {{- include "common.tplvalues.render" (dict "value" .Values.metrics.prometheusRule.additionalLabels "context" $) | nindent 4 }}
-    {{- end }}
-  {{- if .Values.commonAnnotations }}
-  annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
+  name: {{ .Values.metrics.prometheusRule.name }}
+  namespace: {{ .Values.metrics.prometheusRule.namespace | quote }}
+  {{- with .Values.metrics.prometheusRule.labels }}
+  labels:
+    {{- toYaml . | nindent 4 }}
   {{- end }}
 spec:
   groups:
   {{- with .Values.metrics.prometheusRule.rules }}
-    - name: {{ template "common.names.name" $ }}
-      rules: {{- include "common.tplvalues.render" (dict "value" . "context" $) | nindent 8 }}
+    - name: {{ $.Values.metrics.prometheusRule.name }}
+      rules:
+      {{- range . }}
+        - alert: {{ .alert }}
+          expr: {{ .expr | quote }}
+          {{- if .for }}
+          for: {{ .for }}
+          {{- end }}
+          {{- if .labels }}
+          labels:
+            {{- toYaml .labels | nindent 12 }}
+          {{- end }}
+          {{- if .annotations }}
+          annotations:
+            {{- toYaml .annotations | nindent 12 }}
+          {{- end }}
+      {{- end }}
   {{- end }}
 {{- end }}
+```
 
-```
+## 1.2. Add prometheusrule configuration to values.{alpha/prod}.yaml
+Example:
+
+> See freeleaps-ops/freeleaps/helm-pkg/metrics
+
+```yaml
+prometheusRule:
+    name: freepeals-metrics
+    enabled: true
+    namespace: "freeleaps-monitoring-system"
+    labels:
+      release: kube-prometheus-stack
+    rules:
+      - alert: FreeleapsMetricsServiceDown
+        expr: up{job="metrics-service"} == 0
+        for: 1m
+        labels:
+          severity: critical
+          service: metrics-service
+        annotations:
+          summary: "Freeleaps Metrics service is down (instance {{ $labels.instance }})"
+          description: "Freeleaps Metrics service has been down for more than 1 minutes."
+          runbook_url: "https://netorgft10898514.sharepoint.com/:w:/s/FreeleapsEngineeringTeam/EUlvzumTsPxCpPAzI3gm9OIB0DCLTjQzzYVL6VsHYZFjxg?e=0dxVr7"
+      
+      - alert: FreeleapsMetricsServiceHighErrorRate
+        expr: rate(http_requests_total{job="metrics-service",status=~"5.."}[5m]) > 0.1
+        for: 5m
+        labels:
+          severity: warning
+          service: metrics-service
+        annotations:
+          summary: "High error rate in freeleaps metrics service (instance {{ $labels.instance }})"
+          description: "Freeleaps Metrics service error rate is {{ $value }} errors per second."
+          runbook_url: "https://netorgft10898514.sharepoint.com/:w:/s/FreeleapsEngineeringTeam/EUlvzumTsPxCpPAzI3gm9OIB0DCLTjQzzYVL6VsHYZFjxg?e=0dxVr7"
+```
+
+## 1.3. Verify Alert Rule Configuration is Effective
+
+> Redirect to local
+![alt text](asserts/image4.png)
+
+> You can see the newly added rules indicating they are effective
+
+![alt text](asserts/image5.png)