Prometheus rule support

charts/cron-job/templates/cronJob.yaml

@@ -4,7 +4,7 @@ metadata:
   name: {{ .Release.Name }}
   namespace: {{ .Release.Namespace }}
   labels:
-    {{ include "helm-chart.labels" . | nindent 4 }}
+    {{- include "helm-chart.labels" . | nindent 4 }}
 spec:
   schedule: {{ .Values.schedule | quote }}
   successfulJobsHistoryLimit: 1

charts/cron-job/tests/cronjob_configmap_test.yaml

@@ -1,4 +1,4 @@
-suite: test deployment
+suite: test cron job
 templates:
   - cronJob.yaml
   - configmap.yaml

charts/onechart/Chart.yaml

@@ -15,4 +15,4 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.5.1
+version: 0.6.0

charts/onechart/templates/prometheus-rule.yaml

@@ -0,0 +1,24 @@
+{{- if .Values.prometheusRules }}
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: {{ .Release.Name }}
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "helm-chart.labels" . | nindent 4 }}
+annotations:
+spec:
+  groups:
+    - name: kubernetes-apps
+      rules:
+        {{- range $rule := .Values.prometheusRules }}
+        - alert: {{ $rule.name }}
+          annotations:
+            message: {{ $rule.message | quote }}
+            runbook_url: {{ $rule.runBookURL | quote }}
+          expr: {{ $rule.expression | quote }}
+          for: {{ $rule.for | quote }}
+          labels:
+            {{- toYaml $rule.labels | nindent 12 }}
+        {{- end }}
+{{- end }}

charts/onechart/tests/prometheus_rule_test.yaml

@@ -0,0 +1,24 @@
+suite: test prometheus rule
+templates:
+  - prometheus-rule.yaml
+tests:
+  - it: Should set rules
+    set:
+      prometheusRules:
+        - name: KubePodCrashLooping
+          message: Pod {{`{{`}} $labels.namespace {{`}}`}}/{{`{{`}} $labels.pod {{`}}`}} ({{`{{`}} $labels.container {{`}}`}}) is restarting {{`{{`}} printf "%.2f" $value {{`}}`}} times / 5 minutes.
+          runBookURL:
+          expression: rate(kube_pod_container_status_restarts_total{job="kube-state-metrics", namespace=~"{{ $targetNamespace }}"}[15m]) * 60 * 5 > 0
+          for: 1h
+          labels:
+            severity: criticalv
+    asserts:
+      - equal:
+          path: spec.groups[0].name
+          value: kubernetes-apps
+      - equal:
+          path: spec.groups[0].rules[0].alert
+          value: KubePodCrashLooping
+      - equal:
+          path: spec.groups[0].rules[0].expr
+          value: rate(kube_pod_container_status_restarts_total{job="kube-state-metrics", namespace=~"{{ $targetNamespace }}"}[15m]) * 60 * 5 > 0