[prometheus-stackdriver-exporter] Add possiblity to pass extra args to the exporter (#1051)

* Add possiblity to pass extra args to the exporter

Signed-off-by: Anas <anas-aso@users.noreply.github.com>

* Bump minor version.

Signed-off-by: Anas <anas-aso@users.noreply.github.com>

charts/prometheus-stackdriver-exporter/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: Stackdriver exporter for Prometheus
 name: prometheus-stackdriver-exporter
-version: 1.8.3
+version: 1.9.0
 appVersion: 0.11.0
 home: https://www.stackdriver.com/
 sources:

charts/prometheus-stackdriver-exporter/templates/deployment.yaml

@@ -59,6 +59,14 @@ spec:
             - name: stackdriver-service-account
               mountPath: /etc/secrets/service-account/
           {{- end}}
+          {{- if .Values.extraArgs }}
+          args:
+          {{- range $key, $value := .Values.extraArgs }}
+            {{- if $value }}
+            - --{{ $key }}={{ $value }}
+            {{- end }}
+          {{- end }}
+          {{- end }}
           env:
           {{- if or .Values.stackdriver.serviceAccountSecret .Values.stackdriver.serviceAccountKey }}
             - name: GOOGLE_APPLICATION_CREDENTIALS

charts/prometheus-stackdriver-exporter/values.yaml

@@ -69,6 +69,10 @@ affinity: {}
 
 annotations: {}
 
+## Pod extra arguments
+##
+extraArgs: {}
+
 ## Node labels for stackdriver-exporter pod assignment
 ## Ref: https://kubernetes.io/docs/user-guide/node-selection/
 ##