Now possible to define namespaces to scrape by prometheus (#18886)

Signed-off-by: Emil Marklund <emil.marklund@vkmedia.se>

stable/nginx-ingress/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: nginx-ingress
-version: 1.24.7
+version: 1.25.0
 appVersion: 0.26.1
 home: https://github.com/kubernetes/ingress-nginx
 description: An nginx Ingress controller that uses ConfigMap to store the nginx configuration.

stable/nginx-ingress/README.md

@@ -139,6 +139,7 @@ Parameter | Description | Default
 `controller.metrics.serviceMonitor.additionalLabels` | Additional labels that can be used so ServiceMonitor will be discovered by Prometheus | `{}`
 `controller.metrics.serviceMonitor.honorLabels` | honorLabels chooses the metric's labels on collisions with target labels. | `false`
 `controller.metrics.serviceMonitor.namespace` | namespace where servicemonitor resource should be created | `the same namespace as nginx ingress`
+`controller.metrics.serviceMonitor.namespaceSelector` | [namespaceSelector](https://github.com/coreos/prometheus-operator/blob/v0.34.0/Documentation/api.md#namespaceselector) to configure what namespaces to scrape | `will scrape the helm release namespace only`
 `controller.metrics.serviceMonitor.scrapeInterval` | interval between Prometheus scraping | `30s`
 `controller.metrics.prometheusRule.enabled` | Set this to `true` to create prometheusRules for Prometheus operator | `false`
 `controller.metrics.prometheusRule.additionalLabels` | Additional labels that can be used so prometheusRules will be discovered by Prometheus | `{}`

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

@@ -22,9 +22,14 @@ spec:
       {{- if .Values.controller.metrics.serviceMonitor.honorLabels }}
       honorLabels: true
       {{- end }}
+  {{- if .Values.controller.metrics.serviceMonitor.namespaceSelector }}
+  namespaceSelector:
+{{ toYaml .Values.controller.metrics.serviceMonitor.namespaceSelector | indent 4 -}}
+  {{ else }}
   namespaceSelector:
     matchNames:
       - {{ .Release.Namespace }}
+  {{- end }}
   selector:
     matchLabels:
       app: {{ template "nginx-ingress.name" . }}

stable/nginx-ingress/values.yaml

@@ -364,6 +364,11 @@ controller:
       enabled: false
       additionalLabels: {}
       namespace: ""
+      namespaceSelector: {}
+      # Default: scrape .Release.Namespace only
+      # To scrape all, use the following:
+      # namespaceSelector:
+      #   any: true
       scrapeInterval: 30s
       # honorLabels: true