monitoring: Move to topologySpreadConstraints

monitoring/alertmanager.yaml

@@ -31,6 +31,14 @@ kind: Alertmanager
 metadata:
   name: alertmanager
 spec:
+  topologySpreadConstraints:
+    - maxSkew: 1
+      topologyKey: topology.kubernetes.io/zone
+      whenUnsatisfiable: DoNotSchedule
+      labelSelector:
+        matchLabels:
+          app.kubernetes.io/instance: alertmanager
+          app.kubernetes.io/name: alertmanager
   alertmanagerConfigMatcherStrategy:
     type: None
   alertmanagerConfigNamespaceSelector: {}