Container Linux - Daemonsets missing required field "selector"

Signed-off-by: andrew webber (personal) <andrewvwebber@googlemail.com>

cluster/examples/coreos/after-reboot-daemonset.yaml

@@ -4,6 +4,9 @@ metadata:
   name: ceph-after-reboot-check
   namespace: rook-ceph
 spec:
+  selector:
+    matchLabels:
+      app: ceph-after-reboot-check
   template:
     metadata:
       labels:

cluster/examples/coreos/before-reboot-daemonset.yaml

@@ -4,6 +4,9 @@ metadata:
   name: ceph-before-reboot-check
   namespace: rook-ceph
 spec:
+  selector:
+    matchLabels:
+      app: ceph-before-reboot-check
   template:
     metadata:
       labels: