helm-chart: Support excluding namespaces (#83)

This is interesting to scan all namespaces unless a list of specific ones.
Referenced in #66.

Author: guikcd

helm-chart/templates/deployment.yaml

@@ -31,6 +31,9 @@ spec:
         {{- if .Values.namespace.active_in }}
         - --namespace={{ .Values.namespace.active_in }}
         {{- end }}
+        {{- if .Values.namespace.inactive_in }}
+        - --exclude-namespaces={{ .Values.namespace.inactive_in | join "," }}
+        {{- end }}
         {{- end }}
         {{- if .Values.debug.enable }}
         - --debug

helm-chart/values.yaml

@@ -12,6 +12,8 @@ debug:
 # namespace:
   ## Deployment will query all namespaces if left empty:
 #  active_in:
+  ## Deployment exclude these namespaces:
+#  inactive_in:
 ## How frequently kube-downscaler should query applications uptime, unit is in seconds.
 
 ## Default is 1 minute.