sigs.k8s.io/cluster-api-provider-aws@v1.5.5/exp/api/v1beta1/awsfargateprofile_webhook.go

/*
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"

	"github.com/google/go-cmp/cmp"
	"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"

	"sigs.k8s.io/cluster-api-provider-aws/pkg/eks"
	clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
)

const (
	maxProfileNameLength = 100
	maxIAMRoleNameLength = 64
)

// SetupWebhookWithManager will setup the webhooks for the AWSFargateProfile.
func (r *AWSFargateProfile) SetupWebhookWithManager(mgr ctrl.Manager) error {
	return ctrl.NewWebhookManagedBy(mgr).
		For(r).
		Complete()
}

// +kubebuilder:webhook:verbs=create;update,path=/mutate-infrastructure-cluster-x-k8s-io-v1beta1-awsfargateprofile,mutating=true,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=awsfargateprofiles,versions=v1beta1,name=default.awsfargateprofile.infrastructure.cluster.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1
// +kubebuilder:webhook:verbs=create;update,path=/validate-infrastructure-cluster-x-k8s-io-v1beta1-awsfargateprofile,mutating=false,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=awsfargateprofiles,versions=v1beta1,name=validation.awsfargateprofile.infrastructure.cluster.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1

var _ webhook.Defaulter = &AWSFargateProfile{}
var _ webhook.Validator = &AWSFargateProfile{}

// Default will set default values for the AWSFargateProfile.
func (r *AWSFargateProfile) Default() {
	if r.Labels == nil {
		r.Labels = make(map[string]string)
	}
	r.Labels[clusterv1.ClusterLabelName] = r.Spec.ClusterName

	if r.Spec.ProfileName == "" {
		name, err := eks.GenerateEKSName(r.Name, r.Namespace, maxProfileNameLength)
		if err != nil {
			mmpLog.Error(err, "failed to create EKS nodegroup name")
			return
		}

		r.Spec.ProfileName = name
	}
}

// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type.
func (r *AWSFargateProfile) ValidateUpdate(oldObj runtime.Object) error {
	gv := r.GroupVersionKind().GroupKind()
	old, ok := oldObj.(*AWSFargateProfile)
	if !ok {
		return apierrors.NewInvalid(gv, r.Name, field.ErrorList{
			field.InternalError(nil, errors.Errorf("failed to convert old %s to object", gv.Kind)),
		})
	}

	var allErrs field.ErrorList

	// Spec is immutable, but if the new RoleName is the generated one(or default if EnableIAM is disabled) and
	// the old RoleName is nil, then ignore checking that field.
	if old.Spec.RoleName == "" {
		roleName, err := eks.GenerateEKSName(
			"fargate",
			fmt.Sprintf("%s-%s", r.Spec.ClusterName, r.Spec.ProfileName),
			maxIAMRoleNameLength,
		)
		if err != nil {
			mmpLog.Error(err, "failed to create EKS fargate role name")
		}

		if r.Spec.RoleName == roleName || r.Spec.RoleName == DefaultEKSFargateRole {
			r.Spec.RoleName = ""
		}
	}

	// Spec is immutable, but if the new ProfileName is the defaulted one and
	// the old ProfileName is nil, then ignore checking that field.
	if old.Spec.ProfileName == "" {
		name, err := eks.GenerateEKSName(old.Name, old.Namespace, maxProfileNameLength)
		if err != nil {
			mmpLog.Error(err, "failed to create EKS nodegroup name")
		}
		if r.Spec.ProfileName == name {
			r.Spec.ProfileName = ""
		}
	}

	allErrs = append(allErrs, r.Spec.AdditionalTags.Validate()...)
	// remove additionalTags from equal check since they are mutable
	old.Spec.AdditionalTags = nil
	r.Spec.AdditionalTags = nil

	if !cmp.Equal(old.Spec, r.Spec) {
		allErrs = append(
			allErrs,
			field.Invalid(field.NewPath("spec"), r.Spec, "is immutable"),
		)
	}

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

	return apierrors.NewInvalid(
		gv,
		r.Name,
		allErrs,
	)
}

// ValidateCreate implements webhook.Validator so a webhook will be registered for the type.
func (r *AWSFargateProfile) ValidateCreate() error {
	var allErrs field.ErrorList

	allErrs = append(allErrs, r.Spec.AdditionalTags.Validate()...)

	if len(allErrs) == 0 {
		return nil
	}
	return apierrors.NewInvalid(
		r.GroupVersionKind().GroupKind(),
		r.Name,
		allErrs,
	)
}

// ValidateDelete implements webhook.Validator so a webhook will be registered for the type.
func (r *AWSFargateProfile) ValidateDelete() error {
	return nil
}