Add the namespace

apps/kustomization.yaml

@@ -2,4 +2,5 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 namespace: apps
 resources:
+- namespace.yaml
 - whoami

apps/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: apps