adding additional env variable for redis (#7482)

Signed-off-by: gkarthiks <github.gkarthiks@gmail.com>

stable/prometheus-redis-exporter/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: 0.16.0
 description: Prometheus exporter for Redis metrics
 name: prometheus-redis-exporter
-version: 0.3.0
+version: 0.3.1
 home: https://github.com/oliver006/redis_exporter
 sources:
   - https://github.com/oliver006/redis_exporter

stable/prometheus-redis-exporter/README.md

@@ -47,6 +47,7 @@ The following table lists the configurable parameters and their default values.
 | `image.tag`            | prometheus-redis-exporter image tag                 | `v0.16.0`                 |
 | `image.pullPolicy`     | image pull policy                                   | `IfNotPresent`            |
 | `extraArgs`            | extra arguments for the binary; possible values [here](https://github.com/oliver006/redis_exporter#flags)| {}
+| `env`                  | additional environment variables in YAML format. Can be used to pass credentials as env variables (via secret) as per the image readme [here](https://github.com/oliver006/redis_exporter#environment-variables) | {} |
 | `resources`            | cpu/memory resource requests/limits                 | {}                        |
 | `service.type`         | desired service type                                | `ClusterIP`               |
 | `service.port`         | service external port                               | `9121`                    |

stable/prometheus-redis-exporter/templates/deployment.yaml

@@ -36,6 +36,9 @@ spec:
           env:
             - name: REDIS_ADDR
               value: {{ .Values.redisAddress }}
+{{- if .Values.env }}
+{{ toYaml .Values.env | indent 12 }}
+{{- end }}
           livenessProbe:
             httpGet:
               path: /

stable/prometheus-redis-exporter/values.yaml

@@ -16,6 +16,13 @@ image:
   tag: v0.16.0
   pullPolicy: IfNotPresent
 extraArgs: {}
+# Additional Environment variables
+env: {}
+  # - name: REDIS_PASSWORD
+  #   valueFrom:
+  #     secretKeyRef:
+  #       key: redis-password
+  #       name: redis-config-0.0.2
 service:
   type: ClusterIP
   port: 9121