[stable/elasticsearch-exporter] Enabling environment from secrets (#19115)

* [stable/elasticsearch-exporter] Enabling environment from secrets

Signed-off-by: VladyslavTokar <g.vtokar@gmail.com>

* [stable/elasticsearch-exporter] Update description for envFromSecret parameter in readme

Signed-off-by: VladyslavTokar <g.vtokar@gmail.com>

stable/elasticsearch-exporter/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: Elasticsearch stats exporter for Prometheus
 name: elasticsearch-exporter
-version: 2.1.1
+version: 2.2.0
 kubeVersion: ">=1.10.0-0"
 appVersion: 1.1.0
 home: https://github.com/justwatchcom/elasticsearch_exporter

stable/elasticsearch-exporter/README.md

@@ -72,6 +72,7 @@ Parameter | Description | Default
 `service.annotations` | Annotations on the http service | `{}`
 `service.labels` | Additional labels for the service definition | `{}`
 `env` | Extra environment variables passed to pod | `{}`
+`envFromSecret` | The name of an existing secret in the same kubernetes namespace which contains values to be added to the environment | `nil`
 `secretMounts` |  list of secrets and their paths to mount inside the pod | `[]`
 `affinity` | Affinity rules | `{}`
 `es.uri` | address of the Elasticsearch node to connect to | `localhost:9200`

stable/elasticsearch-exporter/templates/deployment.yaml

@@ -55,6 +55,11 @@ spec:
             value: "{{ $value }}"
           {{- end }}
           {{- end }}
+          {{- if .Values.envFromSecret }}
+          envFrom:
+          - secretRef:
+              name: {{ .Values.envFromSecret }}
+          {{- end }}
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           command: ["elasticsearch_exporter",

stable/elasticsearch-exporter/values.yaml

@@ -51,7 +51,11 @@ service:
 ## env:
 ##   KEY_1: value1
 ##   KEY_2: value2
-# env:
+env: {}
+
+## The name of a secret in the same kubernetes namespace which contain values to be added to the environment
+## This can be useful for auth tokens, etc
+envFromSecret: ""
 
 # A list of secrets and their paths to mount inside the pod
 # This is useful for mounting certificates for security