Added supports of ServiceAccount annotation in alertmanager (helm#22725)

Signed-off-by: Philippe Bürgisser (Camptocamp) <philippe.burgisser@camptocamp.com>

Co-authored-by: Scott Rigby <scott@r6by.com>

stable/prometheus-operator/Chart.yaml

@@ -12,7 +12,7 @@ sources:
   - https://github.com/coreos/kube-prometheus
   - https://github.com/coreos/prometheus-operator
   - https://coreos.com/operators/prometheus
-version: 8.14.1
+version: 8.15.0
 appVersion: 0.38.1
 tillerVersion: ">=2.12.0"
 home: https://github.com/coreos/prometheus-operator

stable/prometheus-operator/README.md

@@ -430,6 +430,7 @@ The following tables list the configurable parameters of the prometheus-operator
 | `alertmanager.servicePerReplica.type` |  Alertmanager per replica Service type | `ClusterIP` |
 | `alertmanager.serviceAccount.create` | Create a `serviceAccount` for alertmanager | `true` |
 | `alertmanager.serviceAccount.name` | Name for Alertmanager service account | `""` |
+| `alertmanager.serviceAccount.annotations` | Annotations to add to the serviceaccount | `""` |
 | `alertmanager.serviceMonitor.interval` | Scrape interval. If not set, the Prometheus default scrape interval is used | `nil` |
 | `alertmanager.serviceMonitor.metricRelabelings` | The `metric_relabel_configs` for scraping the alertmanager instance. | `` |
 | `alertmanager.serviceMonitor.relabelings` | The `relabel_configs` for scraping the alertmanager instance. | `` |

stable/prometheus-operator/templates/alertmanager/serviceaccount.yaml

@@ -7,6 +7,10 @@ metadata:
   labels:
     app: {{ template "prometheus-operator.name" . }}-alertmanager
 {{ include "prometheus-operator.labels" . | indent 4 }}
+{{- if .Values.alertmanager.serviceAccount.annotations }}
+  annotations:
+{{ toYaml .Values.alertmanager.serviceAccount.annotations | indent 4 }}
+{{- end }}
 imagePullSecrets:
 {{ toYaml .Values.global.imagePullSecrets | indent 2 }}
 {{- end }}

stable/prometheus-operator/values.yaml

@@ -106,6 +106,7 @@ alertmanager:
   serviceAccount:
     create: true
     name: ""
+    annotations: {}
 
   ## Configure pod disruption budgets for Alertmanager
   ## ref: https://kubernetes.io/docs/tasks/run-application/configure-pdb/#specifying-a-poddisruptionbudget