Alertmanager: Add Prometheus Scrape Annotation

This change adds the scrape annotation to the alertmanager service

Change-Id: I62e405eb37750a57a22fdafdf1ab457aecbb151e

prometheus-alertmanager/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v0.20.0
 description: OpenStack-Helm Alertmanager for Prometheus
 name: prometheus-alertmanager
-version: 0.1.4
+version: 0.1.5
 home: https://prometheus.io/docs/alerting/alertmanager/
 sources:
   - https://github.com/prometheus/alertmanager

prometheus-alertmanager/templates/service.yaml

@@ -14,11 +14,16 @@ limitations under the License.
 
 {{- if .Values.manifests.service }}
 {{- $envAll := . }}
+{{- $prometheus_annotations := $envAll.Values.monitoring.prometheus.prometheus }}
 ---
 apiVersion: v1
 kind: Service
 metadata:
   name: {{ tuple "alertmanager" "internal" . | include "helm-toolkit.endpoints.hostname_short_endpoint_lookup" }}
+  annotations:
+{{- if .Values.monitoring.prometheus.enabled }}
+{{ tuple $prometheus_annotations | include "helm-toolkit.snippets.prometheus_service_annotations" | indent 4 }}
+{{- end }}
 spec:
   ports:
   - name: http

prometheus-alertmanager/values.yaml

@@ -243,6 +243,12 @@ network_policy:
     egress:
       - {}
 
+monitoring:
+  prometheus:
+    enabled: true
+    prometheus:
+      scrape: true
+
 conf:
   httpd: |
     ServerRoot "/usr/local/apache2"