[stable/prometheus-redis-exporter]Add redis authoration configuration in chart (#19447)

* Add redis authoration configuration in prometheus-redis-exporter chart

Signed-off-by: aixeshunter <aixeshunter@gmail.com>

* document all new values in the readme

Signed-off-by: aixeshunter <aixeshunter@gmail.com>

* Fix READ.md some bugs

Signed-off-by: aixeshunter <aixeshunter@gmail.com>

stable/prometheus-redis-exporter/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: 1.0.4
 description: Prometheus exporter for Redis metrics
 name: prometheus-redis-exporter
-version: 3.2.0
+version: 3.2.1
 home: https://github.com/oliver006/redis_exporter
 sources:
   - https://github.com/oliver006/redis_exporter

stable/prometheus-redis-exporter/README.md

@@ -69,6 +69,10 @@ The following table lists the configurable parameters and their default values.
 | `serviceMonitor.targetLabels`  | Set of labels to transfer on the Kubernetes Service onto the target.  |             |
 | `script.configmap`     | Let you run a custom lua script from a configmap. The corresponding environment variable `REDIS_EXPORTER_SCRIPT` will be set automatically ||
 | `script.keyname`       | Name of the key inside configmap which contains your script ||
+| `auth.enabled`       | Specifies whether redis uses authentication | `false` |
+| `auth.secret.name`       | Name of existing redis secret (ignores redisPassword) ||
+| `auth.secret.key`       | Name of key containing password to be retrieved from the existing secret ||
+| `auth.redisPassword`       | Redis password (when not stored in a secret) ||
 
 For more information please refer to the [redis_exporter](https://github.com/oliver006/redis_exporter) documentation.
 

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

@@ -42,6 +42,17 @@ spec:
           env:
             - name: REDIS_ADDR
               value: {{ .Values.redisAddress }}
+          {{- if .Values.auth.enabled }}
+            - name: REDIS_PASSWORD
+            {{- if .Values.auth.secret.name }}
+              valueFrom:
+                secretKeyRef:
+                  name: {{ .Values.auth.secret.name }}
+                  key: {{ .Values.secret.key }}
+            {{- else }}
+              value: {{ .Values.auth.redisPassword }}
+            {{- end }}
+          {{- end }}
 {{- if .Values.script }}
             - name: REDIS_EXPORTER_SCRIPT
               value: /script/script.lua

stable/prometheus-redis-exporter/values.yaml

@@ -58,3 +58,13 @@ serviceMonitor:
 # script:
 #   configmap: prometheus-redis-exporter-script
 #   keyname: script
+
+auth:
+  # Use password authentication
+  enabled: false
+  # Use existing secret (ignores redisPassword)
+  secret:
+    name: ""
+    key: ""
+  # Redis password (when not stored in a secret)
+  redisPassword: ""