coredns: Relax zonal topologySpreadConstraints

Author: hakman

upup/models/cloudup/resources/addons/coredns.addons.k8s.io/k8s-1.12.yaml.template

@@ -155,7 +155,7 @@ spec:
       # Metal provider doesn't add the "topology.kubernetes.io/zone" label
       - maxSkew: 1
         topologyKey: "topology.kubernetes.io/zone"
-        whenUnsatisfiable: DoNotSchedule
+        whenUnsatisfiable: ScheduleAnyway
         labelSelector:
           matchLabels:
             k8s-app: kube-dns

upup/models/cloudup/resources/addons/coredns.addons.k8s.io/values.yaml

@@ -5,7 +5,7 @@ topologySpreadConstraints:
         app.kubernetes.io/instance: '{{ .Release.Name }}'
     topologyKey: topology.kubernetes.io/zone
     maxSkew: 1
-    whenUnsatisfiable: DoNotSchedule
+    whenUnsatisfiable: ScheduleAnyway
   - labelSelector:
       matchLabels:
         app.kubernetes.io/name: '{{ template "coredns.name" . }}'