/
awsmachinetemplate_webhook.go
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/
awsmachinetemplate_webhook.go
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/*
Copyright 2021 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package v1beta1
import (
"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"
"sigs.k8s.io/controller-runtime/pkg/webhook"
)
func (r *AWSMachineTemplate) SetupWebhookWithManager(mgr ctrl.Manager) error {
return ctrl.NewWebhookManagedBy(mgr).
For(r).
Complete()
}
// +kubebuilder:webhook:verbs=create;update,path=/validate-infrastructure-cluster-x-k8s-io-v1beta1-awsmachinetemplate,mutating=false,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=awsmachinetemplates,versions=v1beta1,name=validation.awsmachinetemplate.infrastructure.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1
var (
_ webhook.Validator = &AWSMachineTemplate{}
)
func (r *AWSMachineTemplate) validateRootVolume() field.ErrorList {
var allErrs field.ErrorList
spec := r.Spec.Template.Spec
if spec.RootVolume == nil {
return allErrs
}
if VolumeTypesProvisioned.Has(string(spec.RootVolume.Type)) && spec.RootVolume.IOPS == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("spec.template.spec.rootVolume.iops"), "iops required if type is 'io1' or 'io2'"))
}
if spec.RootVolume.Throughput != nil {
if spec.RootVolume.Type != VolumeTypeGP3 {
allErrs = append(allErrs, field.Required(field.NewPath("spec.template.spec.rootVolume.throughput"), "throughput is valid only for type 'gp3'"))
}
if *spec.RootVolume.Throughput < 0 {
allErrs = append(allErrs, field.Required(field.NewPath("spec.template.spec.rootVolume.throughput"), "throughput must be nonnegative"))
}
}
if spec.RootVolume.DeviceName != "" {
allErrs = append(allErrs, field.Forbidden(field.NewPath("spec.template.spec.rootVolume.deviceName"), "root volume shouldn't have device name"))
}
return allErrs
}
func (r *AWSMachineTemplate) validateNonRootVolumes() field.ErrorList {
var allErrs field.ErrorList
spec := r.Spec.Template.Spec
for _, volume := range spec.NonRootVolumes {
if VolumeTypesProvisioned.Has(string(volume.Type)) && volume.IOPS == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("spec.template.spec.nonRootVolumes.iops"), "iops required if type is 'io1' or 'io2'"))
}
if volume.Throughput != nil {
if volume.Type != VolumeTypeGP3 {
allErrs = append(allErrs, field.Required(field.NewPath("spec.template.spec.nonRootVolumes.throughput"), "throughput is valid only for type 'gp3'"))
}
if *volume.Throughput < 0 {
allErrs = append(allErrs, field.Required(field.NewPath("spec.template.spec.nonRootVolumes.throughput"), "throughput must be nonnegative"))
}
}
if volume.DeviceName == "" {
allErrs = append(allErrs, field.Required(field.NewPath("spec.template.spec.nonRootVolumes.deviceName"), "non root volume should have device name"))
}
}
return allErrs
}
// ValidateCreate implements webhook.Validator so a webhook will be registered for the type.
func (r *AWSMachineTemplate) ValidateCreate() error {
var allErrs field.ErrorList
spec := r.Spec.Template.Spec
if spec.CloudInit.SecretPrefix != "" {
allErrs = append(allErrs, field.Forbidden(field.NewPath("spec", "template", "spec", "cloudInit", "secretPrefix"), "cannot be set in templates"))
}
if spec.CloudInit.SecretCount != 0 {
allErrs = append(allErrs, field.Forbidden(field.NewPath("spec", "cloudInit", "secretCount"), "cannot be set in templates"))
}
if spec.ProviderID != nil {
allErrs = append(allErrs, field.Forbidden(field.NewPath("spec", "template", "spec", "providerID"), "cannot be set in templates"))
}
allErrs = append(allErrs, r.validateRootVolume()...)
allErrs = append(allErrs, r.validateNonRootVolumes()...)
return aggregateObjErrors(r.GroupVersionKind().GroupKind(), r.Name, allErrs)
}
// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type.
func (r *AWSMachineTemplate) ValidateUpdate(old runtime.Object) error {
oldAWSMachineTemplate := old.(*AWSMachineTemplate)
// Allow setting of cloudInit.secureSecretsBackend to "secrets-manager" only to handle v1beta1 upgrade
if oldAWSMachineTemplate.Spec.Template.Spec.CloudInit.SecureSecretsBackend == "" && r.Spec.Template.Spec.CloudInit.SecureSecretsBackend == SecretBackendSecretsManager {
r.Spec.Template.Spec.CloudInit.SecureSecretsBackend = ""
}
if !reflect.DeepEqual(r.Spec, oldAWSMachineTemplate.Spec) {
return apierrors.NewBadRequest("AWSMachineTemplate.Spec is immutable")
}
return nil
}
// ValidateDelete implements webhook.Validator so a webhook will be registered for the type.
func (r *AWSMachineTemplate) ValidateDelete() error {
return nil
}