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vspheremachine_webhook.go
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vspheremachine_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 (
"fmt"
"net"
"reflect"
"github.com/pkg/errors"
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 (m *VSphereMachine) SetupWebhookWithManager(mgr ctrl.Manager) error {
return ctrl.NewWebhookManagedBy(mgr).
For(m).
Complete()
}
// +kubebuilder:webhook:verbs=create;update,path=/validate-infrastructure-cluster-x-k8s-io-v1beta1-vspheremachine,mutating=false,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=vspheremachines,versions=v1beta1,name=validation.vspheremachine.infrastructure.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1
// +kubebuilder:webhook:verbs=create;update,path=/mutate-infrastructure-cluster-x-k8s-io-v1beta1-vspheremachine,mutating=true,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=vspheremachines,versions=v1beta1,name=default.vspheremachine.infrastructure.cluster.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1
var _ webhook.Validator = &VSphereMachine{}
var _ webhook.Defaulter = &VSphereMachine{}
func (m *VSphereMachine) Default() {
if m.Spec.Datacenter == "" {
m.Spec.Datacenter = "*"
}
}
// ValidateCreate implements webhook.Validator so a webhook will be registered for the type
func (m *VSphereMachine) ValidateCreate() error {
var allErrs field.ErrorList
spec := m.Spec
if spec.Network.PreferredAPIServerCIDR != "" {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "PreferredAPIServerCIDR"), spec.Network.PreferredAPIServerCIDR, "cannot be set, as it will be removed and is no longer used"))
}
for i, device := range spec.Network.Devices {
for j, ip := range device.IPAddrs {
if _, _, err := net.ParseCIDR(ip); err != nil {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "network", fmt.Sprintf("devices[%d]", i), fmt.Sprintf("ipAddrs[%d]", j)), ip, "ip addresses should be in the CIDR format"))
}
}
}
return aggregateObjErrors(m.GroupVersionKind().GroupKind(), m.Name, allErrs)
}
// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type
func (m *VSphereMachine) ValidateUpdate(old runtime.Object) error {
newVSphereMachine, err := runtime.DefaultUnstructuredConverter.ToUnstructured(m)
if err != nil {
return apierrors.NewInternalError(errors.Wrap(err, "failed to convert new VSphereMachine to unstructured object"))
}
oldVSphereMachine, err := runtime.DefaultUnstructuredConverter.ToUnstructured(old)
if err != nil {
return apierrors.NewInternalError(errors.Wrap(err, "failed to convert old VSphereMachine to unstructured object"))
}
var allErrs field.ErrorList
newVSphereMachineSpec := newVSphereMachine["spec"].(map[string]interface{})
oldVSphereMachineSpec := oldVSphereMachine["spec"].(map[string]interface{})
// allow changes to providerID
delete(oldVSphereMachineSpec, "providerID")
delete(newVSphereMachineSpec, "providerID")
newVSphereMachineNetwork := newVSphereMachineSpec["network"].(map[string]interface{})
oldVSphereMachineNetwork := oldVSphereMachineSpec["network"].(map[string]interface{})
// allow changes to the devices
delete(oldVSphereMachineNetwork, "devices")
delete(newVSphereMachineNetwork, "devices")
// validate that IPAddrs in updaterequest are valid
spec := m.Spec
for i, device := range spec.Network.Devices {
for j, ip := range device.IPAddrs {
if _, _, err := net.ParseCIDR(ip); err != nil {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "network", fmt.Sprintf("devices[%d]", i), fmt.Sprintf("ipAddrs[%d]", j)), ip, "ip addresses should be in the CIDR format"))
}
}
}
if !reflect.DeepEqual(oldVSphereMachineSpec, newVSphereMachineSpec) {
allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), "cannot be modified"))
}
return aggregateObjErrors(m.GroupVersionKind().GroupKind(), m.Name, allErrs)
}
// ValidateDelete implements webhook.Validator so a webhook will be registered for the type
func (m *VSphereMachine) ValidateDelete() error {
return nil
}