add metrics servicemonitor to stable/mariadb (#14279)

Signed-off-by: zh168654 <zhangye.168@163.com>

stable/mariadb/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: mariadb
-version: 6.2.2
+version: 6.3.0
 appVersion: 10.3.15
 description: Fast, reliable, scalable, and easy to use open-source relational database system. MariaDB Server is intended for mission-critical, heavy-load production systems as well as for embedding into mass-deployed software. Highly available MariaDB cluster.
 keywords:

stable/mariadb/README.md

@@ -147,6 +147,10 @@ The following table lists the configurable parameters of the MariaDB chart and t
 | `metrics.image.tag`                       | Exporter image tag                                  | `v0.10.0`                                                         |
 | `metrics.image.pullPolicy`                | Exporter image pull policy                          | `IfNotPresent`                                                    |
 | `metrics.resources`                       | Exporter resource requests/limit                    | `nil`                                                             |
+| `metrics.serviceMonitor.enabled`          | if `true`, creates a Prometheus Operator ServiceMonitor (also requires `metrics.enabled` to be `true`)                    | `false`                                                             |
+| `metrics.serviceMonitor.namespace`        | Optional namespace which Prometheus is running in   | `nil`                                                             |
+| `metrics.serviceMonitor.interval`         | How frequently to scrape metrics (use by default, falling back to Prometheus' default)  | `nil`                                                             |
+| `metrics.serviceMonitor.selector`         | Default to kube-prometheus install (CoreOS recommended), but should be set according to Prometheus install                    | `{ prometheus: kube-prometheus }`                                                             |
 
 The above parameters map to the env variables defined in [bitnami/mariadb](http://github.com/bitnami/bitnami-docker-mariadb). For more information please refer to the [bitnami/mariadb](http://github.com/bitnami/bitnami-docker-mariadb) image documentation.
 

stable/mariadb/templates/servicemonitor.yaml

@@ -0,0 +1,33 @@
+{{- if and .Values.metrics.enabled .Values.metrics.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ template "mariadb.fullname" . }}
+  {{- if .Values.metrics.serviceMonitor.namespace }}
+  namespace: {{ .Values.metrics.serviceMonitor.namespace }}
+  {{- end }}
+  labels:
+    app: "{{ template "mariadb.name" . }}"
+    chart: {{ template "mariadb.chart" . }}
+    release: {{ .Release.Name | quote }}
+    heritage: {{ .Release.Service | quote }}  
+    {{- range $key, $value := .Values.metrics.serviceMonitor.selector }}
+    {{ $key }}: {{ $value | quote }}
+    {{- end }}
+spec:
+  selector:
+    matchLabels:
+      app: {{ template "mariadb.name" . }}
+      release: {{ .Release.Name | quote }}
+  endpoints:
+  - port: metrics
+    {{- if .Values.metrics.serviceMonitor.interval }}
+    interval: {{ .Values.metrics.serviceMonitor.interval }}
+    {{- end }}
+    {{- if .Values.metrics.serviceMonitor.scrapeTimeout }}
+    scrapeTimeout: {{ .Values.metrics.serviceMonitor.scrapeTimeout }}
+    {{- end }}
+  namespaceSelector:
+    matchNames:
+    - {{ .Release.Namespace }}
+{{- end }}

stable/mariadb/values-production.yaml

@@ -382,3 +382,17 @@ metrics:
   annotations:
     prometheus.io/scrape: "true"
     prometheus.io/port: "9104"
+
+  # Enable this if you're using https://github.com/coreos/prometheus-operator
+  serviceMonitor:
+    enabled: false
+    ## Specify a namespace if needed
+    # namespace: monitoring
+    # fallback to the prometheus default unless specified
+    # interval: 10s
+    # scrapeTimeout: 10s
+    ## Defaults to what's used if you follow CoreOS [Prometheus Install Instructions](https://github.com/helm/charts/tree/master/stable/prometheus-operator#tldr)
+    ## [Prometheus Selector Label](https://github.com/helm/charts/tree/master/stable/prometheus-operator#prometheus-operator-1)
+    ## [Kube Prometheus Selector Label](https://github.com/helm/charts/tree/master/stable/prometheus-operator#exporters)
+    selector:
+      prometheus: kube-prometheus

stable/mariadb/values.yaml

@@ -381,3 +381,17 @@ metrics:
   annotations:
     prometheus.io/scrape: "true"
     prometheus.io/port: "9104"
+
+  # Enable this if you're using https://github.com/coreos/prometheus-operator
+  serviceMonitor:
+    enabled: false
+    ## Specify a namespace if needed
+    # namespace: monitoring
+    # fallback to the prometheus default unless specified
+    # interval: 10s
+    # scrapeTimeout: 10s
+    ## Defaults to what's used if you follow CoreOS [Prometheus Install Instructions](https://github.com/helm/charts/tree/master/stable/prometheus-operator#tldr)
+    ## [Prometheus Selector Label](https://github.com/helm/charts/tree/master/stable/prometheus-operator#prometheus-operator-1)
+    ## [Kube Prometheus Selector Label](https://github.com/helm/charts/tree/master/stable/prometheus-operator#exporters)
+    selector:
+      prometheus: kube-prometheus