[stable/influxdb] passing environment variables to influx (#3007)

stable/influxdb/Chart.yaml

 name: influxdb
-version: 0.6.1
+version: 0.7.0
 description: Scalable datastore for metrics, events, and real-time analytics.
 keywords:
 - influxdb

stable/influxdb/templates/deployment.yaml

@@ -43,6 +43,10 @@ spec:
         - name: opentsdb
           containerPort: {{ .Values.config.opentsdb.bind_address }}
         {{- end }}
+        {{ if .Values.env }}
+        env:
+{{ toYaml .Values.env | indent 10 }}
+        {{- end }}
         livenessProbe:
           httpGet:
             path: /ping

stable/influxdb/values.yaml

@@ -82,6 +82,13 @@ resources:
 ##
 nodeSelector: {}
 
+## The InfluxDB image uses several environment variables to automatically
+## configure certain parts of the server.
+## Ref: https://hub.docker.com/_/influxdb/
+env:
+  # - name: INFLUXDB_DB
+  #   value: "demo"
+
 ## Change InfluxDB configuration paramaters below:
 ## Defaults are indicated
 ## ref: https://docs.influxdata.com/influxdb/v1.1/administration/config/