Add CEL validation for target ref kind

Author: Kate Osborn

apis/v1alpha1/clientsettingspolicy_types.go

@@ -38,8 +38,10 @@ type ClientSettingsPolicyList struct {
 type ClientSettingsPolicySpec struct {
 	// TargetRef identifies an API object to apply the policy to.
 	// Object must be in the same namespace as the policy.
+	// Support: Gateway, HTTPRoute, GRPCRoute.
 	//
-	// Support: Gateway, HTTPRoute
+	// +kubebuilder:validation:XValidation:message="TargetRef Kind must be one of: Gateway, HTTPRoute, or GRPCRoute",rule="(self.kind=='Gateway' || self.kind=='HTTPRoute' || self.kind=='GRPCRoute')"
+	//nolint:lll
 	TargetRef gatewayv1alpha2.PolicyTargetReference `json:"targetRef"`
 
 	// Body defines the client request body settings.

config/crd/bases/gateway.nginx.org_clientsettingspolicies.yaml

@@ -116,9 +116,7 @@ spec:
                 description: |-
                   TargetRef identifies an API object to apply the policy to.
                   Object must be in the same namespace as the policy.
-
-
-                  Support: Gateway, HTTPRoute
+                  Support: Gateway, HTTPRoute, GRPCRoute.
                 properties:
                   group:
                     description: Group is the group of the target resource.
@@ -151,6 +149,10 @@ spec:
                 - kind
                 - name
                 type: object
+                x-kubernetes-validations:
+                - message: 'TargetRef Kind must be one of: Gateway, HTTPRoute, or
+                    GRPCRoute'
+                  rule: (self.kind=='Gateway' || self.kind=='HTTPRoute' || self.kind=='GRPCRoute')
             required:
             - targetRef
             type: object

deploy/crds.yaml

@@ -115,9 +115,7 @@ spec:
                 description: |-
                   TargetRef identifies an API object to apply the policy to.
                   Object must be in the same namespace as the policy.
-
-
-                  Support: Gateway, HTTPRoute
+                  Support: Gateway, HTTPRoute, GRPCRoute.
                 properties:
                   group:
                     description: Group is the group of the target resource.
@@ -150,6 +148,10 @@ spec:
                 - kind
                 - name
                 type: object
+                x-kubernetes-validations:
+                - message: 'TargetRef Kind must be one of: Gateway, HTTPRoute, or
+                    GRPCRoute'
+                  rule: (self.kind=='Gateway' || self.kind=='HTTPRoute' || self.kind=='GRPCRoute')
             required:
             - targetRef
             type: object