Ensure webhook validation ingress has a PathTypePrefix

internal/k8s/main.go

@@ -149,3 +149,22 @@ func NetworkingIngressAvailable(client clientset.Interface) (bool, bool) {
 
 	return runningVersion.AtLeast(version114), runningVersion.AtLeast(version118)
 }
+
+// Default path type is Prefix to not break existing definitions
+var defaultPathType = networkingv1beta1.PathTypePrefix
+
+// SetDefaultPathTypeIfEmpty sets a default PathType when is not defined.
+func SetDefaultPathTypeIfEmpty(ing *networkingv1beta1.Ingress) {
+	for _, rule := range ing.Spec.Rules {
+		if rule.IngressRuleValue.HTTP == nil {
+			continue
+		}
+
+		for idx := range rule.IngressRuleValue.HTTP.Paths {
+			p := &rule.IngressRuleValue.HTTP.Paths[idx]
+			if p.PathType == nil {
+				p.PathType = &defaultPathType
+			}
+		}
+	}
+}