[stable/superset] Add env vars from values or secret (#5745)

* Add env from value file or secret

* Update README

* Update variables naming, Update Chart version

stable/superset/Chart.yaml

@@ -1,6 +1,6 @@
 description: Apache Superset (incubating) is a modern, enterprise-ready business intelligence web application
 name: superset
-version: 0.1.1
+version: 0.1.2
 appVersion: "0.24.0"
 keywords:
 - bi

stable/superset/README.md

@@ -47,6 +47,8 @@ The command removes all the Kubernetes components associated with the chart and
 | `configFile`               | Content of [`superset_config.py`](https://superset.incubator.apache.org/installation.html)                     | See values.yaml](./values.yaml)              |
 | `initFile`                 | Content of init shell script                    | See [values.yaml](./values.yaml)                             |
 | `replicas`                 | Number of replicas of superset                  | `1`                                                          |
+| `extraEnv`                      | Extra environment variables passed to pods      | `{}`                                                          |
+| `extraEnvFromSecret`            | The name of a Kubernetes secret (must be manually created in the same namespace) containing values to be added to the environment | `""`                                                          |
 | `persistence.enabled`      | Enable persistence                              | `false`                                                      |
 | `persistence.existingClaim`| Provide an existing PersistentVolumeClaim       | `""`                                                         |
 | `persistence.storageClass` | Storage class of backing PVC                    | `nil` (uses alpha storage class annotation)                  |

stable/superset/templates/deployment.yaml

@@ -56,6 +56,16 @@ spec:
             - name: http
               containerPort: 8088
               protocol: TCP
+          env:
+          {{- range $key, $value := .Values.extraEnv }}
+            - name: "{{ $key }}"
+              value: "{{ $value }}"
+          {{- end }}
+        {{- if .Values.extraEnvFromSecret }}
+          envFrom:
+            - secretRef:
+                name: {{ .Values.extraEnvFromSecret }}
+        {{- end }}
     {{- with .Values.resources }}
           resources:
 {{ toYaml . | indent 12 }}

stable/superset/values.yaml

@@ -47,6 +47,14 @@ configFile: |-
   # Set this API key to enable Mapbox visualizations
   MAPBOX_API_KEY = ''
 
+## Extra environment variables that will be passed onto deployment pod
+##
+extraEnv: {}
+
+## The name of a secret in the same kubernetes namespace which contain values to be added to the environment
+## This can be useful for secret keys, etc
+##
+extraEnvFromSecret: ""
 
 persistence: