chart: added possibility to override ServiceMonitor apiVersion

Signed-off-by: Dmytro Bondar <git@bonddim.com>

charts/ingress-nginx/README.md

@@ -398,6 +398,7 @@ metadata:
 | controller.metrics.service.type | string | `"ClusterIP"` |  |
 | controller.metrics.serviceMonitor.additionalLabels | object | `{}` |  |
 | controller.metrics.serviceMonitor.annotations | object | `{}` | Annotations to be added to the ServiceMonitor. |
+| controller.metrics.serviceMonitor.apiVersion | string | `"monitoring.coreos.com/v1"` | Override API version of the ServiceMonitor resource. E.g. `azmonitoring.coreos.com/v1` for Azure Managed Prometheus |
 | controller.metrics.serviceMonitor.enabled | bool | `false` |  |
 | controller.metrics.serviceMonitor.labelLimit | int | `0` | Per-scrape limit on number of labels that will be accepted for a sample. |
 | controller.metrics.serviceMonitor.labelNameLengthLimit | int | `0` | Per-scrape limit on length of labels name that will be accepted for a sample. |

charts/ingress-nginx/templates/controller-servicemonitor.yaml

@@ -1,5 +1,5 @@
 {{- if and .Values.controller.metrics.enabled .Values.controller.metrics.serviceMonitor.enabled -}}
-apiVersion: monitoring.coreos.com/v1
+apiVersion: {{ .Values.controller.metrics.serviceMonitor.apiVersion }}
 kind: ServiceMonitor
 metadata:
   name: {{ include "ingress-nginx.controller.fullname" . }}

charts/ingress-nginx/values.yaml

@@ -874,6 +874,9 @@ controller:
       # nodePort: ""
     serviceMonitor:
       enabled: false
+      # -- Override API version of the ServiceMonitor resource.
+      # E.g. `azmonitoring.coreos.com/v1` for Azure Managed Prometheus
+      apiVersion: monitoring.coreos.com/v1
       additionalLabels: {}
       # -- Annotations to be added to the ServiceMonitor.
       annotations: {}