Add support for extra labels in Alertmanager ingress

Signed-off-by: jiaychen <jiayu.chen@camptocamp.com>

Author: jiayuchen888

charts/alertmanager/templates/ingress.yaml

@@ -7,6 +7,9 @@ metadata:
   name: {{ $fullName }}
   labels:
     {{- include "alertmanager.labels" . | nindent 4 }}
+    {{- if .Values.ingress.labels }}
+    {{ toYaml .Values.ingress.labels | indent 4 }}
+    {{- end }}
   {{- with .Values.ingress.annotations }}
   annotations:
     {{- toYaml . | nindent 4 }}

charts/alertmanager/values.yaml

@@ -144,6 +144,7 @@ servicePerReplica:
 ingress:
   enabled: false
   className: ""
+  labels: {}
   annotations: {}
     # kubernetes.io/ingress.class: nginx
     # kubernetes.io/tls-acme: "true"