[stable/minio] add a servicemonitor resource for Prometheus operator (#14028)

* [stable/minio] add a servicemonitor resource for Prometheus operator

Signed-off-by: Sébastien Prud'homme <sebastien.prudhomme@gmail.com>

* Add some new parameters for ServiceMonitor

Signed-off-by: Sébastien Prud'homme <sebastien.prudhomme@gmail.com>

* [stable/minio] Typo

Signed-off-by: Sébastien Prud'homme <sebastien.prudhomme@gmail.com>

stable/minio/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: MinIO is a high performance distributed object storage server, designed for large-scale private cloud infrastructure.
 name: minio
-version: 2.4.18
+version: 2.5.0
 appVersion: RELEASE.2019-05-14T23-57-45Z
 keywords:
 - storage

stable/minio/README.md

@@ -160,6 +160,11 @@ The following table lists the configurable parameters of the MinIO chart and the
 | `nasgateway.enabled`       | Use MinIO as a [NAS gateway](https://docs.MinIO.io/docs/minio-gateway-for-nas)             | `false` |
 | `nasgateway.replicas`      | Number of NAS gateway instances to be run in parallel on a PV            | `4` |
 | `environment`              | Set MinIO server relevant environment variables in `values.yaml` file. MinIO containers will be passed these variables when they start. | `MINIO_BROWSER: "on"` |
+| `metrics.serviceMonitor.enabled`          | Set this to `true` to create ServiceMonitor for Prometheus operator                   | `false` |
+| `metrics.serviceMonitor.additionalLabels` | Additional labels that can be used so ServiceMonitor will be discovered by Prometheus | `{}`    |
+| `metrics.serviceMonitor.namespace`        | Optional namespace in which to create ServiceMonitor                                  | `nil`   |
+| `metrics.serviceMonitor.interval`         | Scrape interval. If not set, the Prometheus default scrape interval is used           | `nil`   |
+| `metrics.serviceMonitor.scrapeTimeout`    | Scrape timeout. If not set, the Prometheus default scrape timeout is used             | `nil`   |
 
 Some of the parameters above map to the env variables defined in the [MinIO DockerHub image](https://hub.docker.com/r/minio/minio/).
 

stable/minio/templates/servicemonitor.yaml

@@ -0,0 +1,34 @@
+{{- if .Values.metrics.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ template "minio.fullname" . }}
+  {{- if .Values.metrics.serviceMonitor.namespace }}
+  namespace: {{ .Values.metrics.serviceMonitor.namespace }}
+  {{- end }}
+  labels:
+    app: {{ template "minio.name" . }}
+    chart: {{ template "minio.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+    {{- if .Values.metrics.serviceMonitor.additionalLabels }}
+{{ toYaml .Values.metrics.serviceMonitor.additionalLabels | indent 4 }}
+    {{- end }}
+spec:
+  endpoints:
+    - port: service
+      path: /minio/prometheus/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 }}
+  selector:
+    matchLabels:
+      app: {{ include "minio.name" . }}
+      release: {{ .Release.Name }}
+{{- end }}

stable/minio/values.yaml

@@ -257,3 +257,12 @@ serviceAccount:
   ## The name of the service account to use. If 'create' is 'true', a service account with that name
   ## will be created. Otherwise, a name will be auto-generated.
   name:
+
+metrics:
+  # Metrics can not be disabled yet: https://github.com/minio/minio/issues/7493
+  serviceMonitor:
+    enabled: false
+    additionalLabels: {}
+    # namespace: monitoring
+    # interval: 30s
+    # scrapeTimeout: 10s