vspheremachineconfig_webhook.go

package v1alpha1

import (
	"fmt"
	"reflect"

	apierrors "k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/util/validation/field"
	ctrl "sigs.k8s.io/controller-runtime"
	logf "sigs.k8s.io/controller-runtime/pkg/log"
	"sigs.k8s.io/controller-runtime/pkg/webhook"
)

// log is for logging in this package.
var vspheremachineconfiglog = logf.Log.WithName("vspheremachineconfig-resource")

func (r *VSphereMachineConfig) SetupWebhookWithManager(mgr ctrl.Manager) error {
	return ctrl.NewWebhookManagedBy(mgr).
		For(r).
		Complete()
}

// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!

// TODO(user): change verbs to "verbs=create;update;delete" if you want to enable deletion validation.
//+kubebuilder:webhook:path=/validate-anywhere-eks-amazonaws-com-v1alpha1-vspheremachineconfig,mutating=false,failurePolicy=fail,sideEffects=None,groups=anywhere.eks.amazonaws.com,resources=vspheremachineconfigs,verbs=create;update,versions=v1alpha1,name=validation.vspheremachineconfig.anywhere.amazonaws.com,admissionReviewVersions={v1,v1beta1}

var _ webhook.Validator = &VSphereMachineConfig{}

// ValidateCreate implements webhook.Validator so a webhook will be registered for the type
func (r *VSphereMachineConfig) ValidateCreate() error {
	vspheremachineconfiglog.Info("validate create", "name", r.Name)

	return nil
}

// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type
func (r *VSphereMachineConfig) ValidateUpdate(old runtime.Object) error {
	vspheremachineconfiglog.Info("validate update", "name", r.Name)

	oldVSphereMachineConfig, ok := old.(*VSphereMachineConfig)
	if !ok {
		return apierrors.NewBadRequest(fmt.Sprintf("expected a VSphereMachineConfig but got a %T", old))
	}

	var allErrs field.ErrorList

	allErrs = append(allErrs, validateImmutableFieldsVSphereMachineConfig(r, oldVSphereMachineConfig)...)

	if len(allErrs) == 0 {
		return nil
	}

	return apierrors.NewInvalid(GroupVersion.WithKind(VSphereMachineConfigKind).GroupKind(), r.Name, allErrs)
}

func validateImmutableFieldsVSphereMachineConfig(new, old *VSphereMachineConfig) field.ErrorList {
	if old.IsReconcilePaused() {
		vspheremachineconfiglog.Info("Reconciliation is paused")
		return nil
	}

	var allErrs field.ErrorList

	if old.Spec.OSFamily != new.Spec.OSFamily {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "osFamily"), new.Spec.OSFamily, "field is immutable"),
		)
	}

	if !reflect.DeepEqual(old.Spec.Users, new.Spec.Users) {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "users"), new.Spec.Users, "field is immutable"),
		)
	}

	if old.Spec.StoragePolicyName != new.Spec.StoragePolicyName {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "storagepolicyname"), new.Spec.StoragePolicyName, "field is immutable"),
		)
	}

	// TODO: enable etcd machine upgrade after controller supports control plane then workers order upgrade.
	if !old.IsManagement() && !old.IsEtcd() {
		vspheremachineconfiglog.Info("Machine config is associated with workload cluster's control plane or worker nodes")
		return allErrs
	}

	if old.IsManagement() && !old.IsEtcd() && !old.IsControlPlane() {
		vspheremachineconfiglog.Info("Machine config is associated with management cluster's worker nodes")
		return allErrs
	}

	vspheremachineconfiglog.Info("Machine config is associated with management cluster's control plane or etcd, or workload cluster's etcd")

	if old.Spec.Template != new.Spec.Template {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "template"), new.Spec.Template, "field is immutable"),
		)
	}

	if old.Spec.Datastore != new.Spec.Datastore {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "datastore"), new.Spec.Datastore, "field is immutable"),
		)
	}

	if old.Spec.Folder != new.Spec.Folder {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "folder"), new.Spec.Folder, "field is immutable"),
		)
	}

	if old.Spec.ResourcePool != new.Spec.ResourcePool {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "resourcePool"), new.Spec.ResourcePool, "field is immutable"),
		)
	}

	if old.Spec.MemoryMiB != new.Spec.MemoryMiB {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "memoryMiB"), new.Spec.MemoryMiB, "field is immutable"),
		)
	}

	if old.Spec.NumCPUs != new.Spec.NumCPUs {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "numCPUs"), new.Spec.NumCPUs, "field is immutable"),
		)
	}

	if old.Spec.DiskGiB != new.Spec.DiskGiB {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec", "diskGiB"), new.Spec.DiskGiB, "field is immutable"),
		)
	}

	return allErrs
}

// ValidateDelete implements webhook.Validator so a webhook will be registered for the type
func (r *VSphereMachineConfig) ValidateDelete() error {
	vspheremachineconfiglog.Info("validate delete", "name", r.Name)

	return nil
}