[stable/promethues-redis-exporter] Add target labels (#18818)

Signed-off-by: Salvatore Mazzarino <dev@mazzarino.cz>

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: 3.1.0
+version: 3.2.0
 home: https://github.com/oliver006/redis_exporter
 sources:
   - https://github.com/oliver006/redis_exporter

stable/prometheus-redis-exporter/README.md

@@ -66,6 +66,7 @@ The following table lists the configurable parameters and their default values.
 | `serviceMonitor.telemetryPath` | Path to redis-exporter telemtery-path                  |                            |
 | `serviceMonitor.labels`        | Labels for the servicemonitor passed to Prometheus Operator      |  `{}`            |
 | `serviceMonitor.timeout`       | Timeout after which the scrape is ended                |                            |
+| `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 ||
 

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

@@ -31,5 +31,11 @@ spec:
     matchLabels:
       app: {{ template "prometheus-redis-exporter.name" . }}
       release: {{ .Release.Name }}
+{{- if .Values.serviceMonitor.targetLabels }}
+{{- range .Values.serviceMonitor.targetLabels }}
+  targetLabels: 
+    - {{ . }}
+{{- end }}
+{{- end }}
 {{- end }}
 {{- end }}

stable/prometheus-redis-exporter/values.yaml

@@ -51,6 +51,8 @@ serviceMonitor:
   # labels:
   # Set timeout for scrape
   # timeout: 10s
+  # Set of labels to transfer on the Kubernetes Service onto the target.
+  # targetLabels: []
 
 # Used to mount a LUA-Script via config map and use it for metrics-collection
 # script: