traefik: define cluster ingress class

infrastructure/traefik/ingressclass.yaml

@@ -0,0 +1,9 @@
+# infrastructure/traefik/ingressclass.yaml
+apiVersion: networking.k8s.io/v1
+kind: IngressClass
+metadata:
+  name: traefik
+  annotations:
+    ingressclass.kubernetes.io/is-default-class: "true"
+spec:
+  controller: traefik.io/ingress-controller

infrastructure/traefik/kustomization.yaml

@@ -6,6 +6,7 @@ metadata:
   namespace: flux-system
 resources:
   - crds.yaml
+  - ingressclass.yaml
   - deployment.yaml
   - serviceaccount.yaml
   - clusterrole.yaml