[stable/influxdb] add nodeSelector for influxdb (#2582)

stable/influxdb/Chart.yaml

 name: influxdb
-version: 0.5.0
+version: 0.6.0
 description: Scalable datastore for metrics, events, and real-time analytics.
 keywords:
 - influxdb

stable/influxdb/templates/deployment.yaml

@@ -76,3 +76,7 @@ spec:
       - name: config
         configMap:
           name: {{ template "influxdb.fullname" . }}
+    {{- if .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml .Values.nodeSelector | indent 8 }}
+      {{- end -}}

stable/influxdb/values.yaml

@@ -76,7 +76,13 @@ resources:
   limits:
     memory: 16Gi
     cpu: 8
-    
+
+## Node labels for pod assignment
+## Ref: https://kubernetes.io/docs/user-guide/node-selection/
+##
+nodeSelector: {}
+
+
 ## Change InfluxDB configuration paramaters below:
 ## Defaults are indicated
 ## ref: https://docs.influxdata.com/influxdb/v1.1/administration/config/