[stable/elasticsearch-exporter] Feature flap the flag es.uri (#20589)

* Feature flap the flag es.uri to allow fallback to env var ES_URI

Signed-off-by: Maxime Fouilleul <maxime.fouilleul@blablacar.com>

* Bump chart

Signed-off-by: Maxime Fouilleul <maxime.fouilleul@blablacar.com>

stable/elasticsearch-exporter/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: Elasticsearch stats exporter for Prometheus
 name: elasticsearch-exporter
-version: 2.2.0
+version: 2.3.0
 kubeVersion: ">=1.10.0-0"
 appVersion: 1.1.0
 home: https://github.com/justwatchcom/elasticsearch_exporter

stable/elasticsearch-exporter/templates/deployment.yaml

@@ -63,7 +63,9 @@ spec:
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           command: ["elasticsearch_exporter",
+                    {{- if .Values.es.uri }}                    
                     "--es.uri={{ .Values.es.uri }}",
+                    {{- end }}
                     {{- if .Values.es.all }}
                     "--es.all",
                     {{- end }}