[prometheus-nats-exporter] support service annotations (#914)

* support annotations in nats-exporter service

Signed-off-by: brunopadz <bpadz@protonmail.com>

* fix helm templating

Signed-off-by: brunopadz <bpadz@protonmail.com>

* Update charts/prometheus-nats-exporter/templates/service.yaml

Co-authored-by: Mikhail Naletov <36846182+okgolove@users.noreply.github.com>
Signed-off-by: brunopadz <bpadz@protonmail.com>

* fix templating

Signed-off-by: brunopadz <bpadz@protonmail.com>

Co-authored-by: Mikhail Naletov <36846182+okgolove@users.noreply.github.com>

charts/prometheus-nats-exporter/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: 0.7.0
 description: A Helm chart for prometheus-nats-exporter
 name: prometheus-nats-exporter
-version: 2.6.0
+version: 2.7.0
 home: https://github.com/nats-io/prometheus-nats-exporter
 sources:
   - https://github.com/nats-io/prometheus-nats-exporter

charts/prometheus-nats-exporter/templates/service.yaml

@@ -1,6 +1,8 @@
 apiVersion: v1
 kind: Service
 metadata:
+  annotations:
+{{ toYaml .Values.service.annotations | indent 4 }}
   name: {{ include "prometheus-nats-exporter.fullname" . }}
   labels:
     app.kubernetes.io/name: {{ include "prometheus-nats-exporter.name" . }}

charts/prometheus-nats-exporter/values.yaml

@@ -10,6 +10,7 @@ image:
   pullPolicy: IfNotPresent
 
 service:
+  annotations: {}
   type: ClusterIP
   port: 80
   targetPort: 7777