/
backendgroup_validator.go
64 lines (52 loc) · 2.3 KB
/
backendgroup_validator.go
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package appmesh
import (
"context"
appmesh "github.com/aws/aws-app-mesh-controller-for-k8s/apis/appmesh/v1beta2"
"github.com/aws/aws-app-mesh-controller-for-k8s/pkg/webhook"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/runtime"
"reflect"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
"strings"
)
const apiPathValidateAppMeshBackendGroup = "/validate-appmesh-k8s-aws-v1beta2-backendgroup"
// NewBackendGroupValidator returns a validator for BackendGroup.
func NewBackendGroupValidator() *backendGroupValidator {
return &backendGroupValidator{}
}
var _ webhook.Validator = &backendGroupValidator{}
type backendGroupValidator struct {
}
func (v *backendGroupValidator) Prototype(req admission.Request) (runtime.Object, error) {
return &appmesh.BackendGroup{}, nil
}
func (v *backendGroupValidator) ValidateCreate(ctx context.Context, obj runtime.Object) error {
return nil
}
func (v *backendGroupValidator) ValidateUpdate(ctx context.Context, obj runtime.Object, oldObj runtime.Object) error {
bg := obj.(*appmesh.BackendGroup)
oldVS := oldObj.(*appmesh.BackendGroup)
if err := v.enforceFieldsImmutability(bg, oldVS); err != nil {
return err
}
return nil
}
func (v *backendGroupValidator) ValidateDelete(ctx context.Context, obj runtime.Object) error {
return nil
}
// enforceFieldsImmutability will enforce immutable fields are not changed.
func (v *backendGroupValidator) enforceFieldsImmutability(bg *appmesh.BackendGroup, oldVS *appmesh.BackendGroup) error {
var changedImmutableFields []string
if !reflect.DeepEqual(bg.Spec.MeshRef, oldVS.Spec.MeshRef) {
changedImmutableFields = append(changedImmutableFields, "spec.meshRef")
}
if len(changedImmutableFields) != 0 {
return errors.Errorf("%s update may not change these fields: %s", "BackendGroup", strings.Join(changedImmutableFields, ","))
}
return nil
}
// +kubebuilder:webhook:path=/validate-appmesh-k8s-aws-v1beta2-backendgroup,mutating=false,failurePolicy=fail,groups=appmesh.k8s.aws,resources=backendgroups,verbs=create;update,versions=v1beta2,name=vbackendgroup.appmesh.k8s.aws,sideEffects=None,webhookVersions=v1beta1
func (v *backendGroupValidator) SetupWithManager(mgr ctrl.Manager) {
mgr.GetWebhookServer().Register(apiPathValidateAppMeshBackendGroup, webhook.ValidatingWebhookForValidator(v))
}