basehub: allow shared-volume-reporter to be disabled

helm-charts/basehub/templates/home-space-reporter.yaml

@@ -1,8 +1,16 @@
 {{- if .Values.nfs.enabled }}
+{{- if .Values.nfs.volumeReporter.enabled }}
 # To provide data for the jupyterhub/grafana-dashboards dashboard about free
 # space in the shared volume, which contains users home folders etc, we deploy
 # prometheus node-exporter to collect this data for prometheus server to scrape.
 #
+# This prometheus metrics exporter will when used against a shared EFS storage
+# (AWS NFS service) report an extreme amount of available disk space, making the
+# available space remaining 100%. This makes the jupyterhub/grafana-dashboards
+# graph reporting remaining available disk space in % quite pointless. Due to
+# that, it can make sense to disable this if EFS is used to provide storage as
+# it becomes another pod that eats up the available pods per node.
+#
 # This is based on the Deployment manifest in jupyterhub/grafana-dashboards'
 # readme: https://github.com/jupyterhub/grafana-dashboards#additional-collectors
 #

helm-charts/basehub/values.schema.yaml

@@ -194,6 +194,14 @@ properties:
         properties:
           enabled:
             type: boolean
+      volumeReporter:
+        type: object
+        additionalProperties: false
+        required:
+          - enabled
+        properties:
+          enabled:
+            type: boolean
       shareCreator:
         type: object
         additionalProperties: false

helm-charts/basehub/values.yaml

@@ -71,6 +71,8 @@ nfs:
   enabled: false
   dirsizeReporter:
     enabled: true
+  volumeReporter:
+    enabled: true
   shareCreator:
     enabled: true
     tolerations: []