allow mounting configmaps (#15356)

Signed-off-by: Arno Uhlig <arno.uhlig@sap.com>

stable/prometheus-node-exporter/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: "0.18.0"
 description: A Helm chart for prometheus node-exporter
 name: prometheus-node-exporter
-version: 1.5.2
+version: 1.6.0
 home: https://github.com/prometheus/node_exporter/
 sources:
 - https://github.com/prometheus/node_exporter/

stable/prometheus-node-exporter/README.md

@@ -66,6 +66,7 @@ The following table lists the configurable parameters of the Node Exporter chart
 | `prometheus.monitor.additionalLabels` | Additional labels that can be used so ServiceMonitor will be discovered by Prometheus | `{}` | |
 | `prometheus.monitor.namespace` | namespace where servicemonitor resource should be created | `the same namespace as prometheus node exporter` | |
 | `prometheus.monitor.scrapeTimeout` | Timeout after which the scrape is ended | `10s` | |
+| `configmaps`                      | Allow mounting additional configmaps.                                                                                         | `{}`                                    |     |    
 
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
 

stable/prometheus-node-exporter/templates/daemonset.yaml

@@ -68,6 +68,12 @@ spec:
             {{- end }}
             {{- end }}
             {{- end }}
+            {{- if .Values.configmaps }}
+            {{- range $_, $mount := .Values.configmaps }}
+            - name: {{ $mount.name }}
+              mountPath: {{ $mount.mountPath }}
+            {{- end }}
+            {{- end }}
       hostNetwork: {{ .Values.hostNetwork }}
       hostPID: true
 {{- if .Values.affinity }}
@@ -96,3 +102,10 @@ spec:
             path: {{ $mount.hostPath }}
         {{- end }}
         {{- end }}
+        {{- if .Values.configmaps }}
+        {{- range $_, $mount := .Values.configmaps }}
+        - name: {{ $mount.name }}
+          configMap:
+            name: {{ $mount.name }}
+        {{- end }}
+        {{- end }}

stable/prometheus-node-exporter/values.yaml

@@ -99,3 +99,9 @@ extraHostVolumeMounts: {}
 #    mountPath: <mountPath>
 #    readOnly: true|false
 #    mountPropagation: None|HostToContainer|Bidirectional
+
+## Additional configmaps to be mounted.
+##
+configmaps: {}
+# - name: <configMapName>
+#   mountPath: <mountPath>