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rbac.go
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rbac.go
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// Copyright Project Contour 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 objects
import (
"context"
"fmt"
operatorv1alpha1 "github.com/projectsesame/sesame-operator/api/v1alpha1"
objcr "github.com/projectsesame/sesame-operator/internal/objects/clusterrole"
objcrb "github.com/projectsesame/sesame-operator/internal/objects/clusterrolebinding"
objrole "github.com/projectsesame/sesame-operator/internal/objects/role"
objrb "github.com/projectsesame/sesame-operator/internal/objects/rolebinding"
objsa "github.com/projectsesame/sesame-operator/internal/objects/serviceaccount"
objSesame "github.com/projectsesame/sesame-operator/internal/objects/sesame"
"github.com/projectsesame/sesame-operator/pkg/labels"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
// SesameRbacName is the name used for Sesame RBAC resources.
SesameRbacName = "sesame"
// EnvoyRbacName is the name used for Envoy RBAC resources.
EnvoyRbacName = "envoy"
// CertGenRbacName is the name used for Sesame certificate
// generation RBAC resources.
CertGenRbacName = "sesame-certgen"
)
// EnsureRBAC ensures all the necessary RBAC resources exist for the
// provided sesame.
func EnsureRBAC(ctx context.Context, cli client.Client, sesame *operatorv1alpha1.Sesame) error {
ns := sesame.Spec.Namespace.Name
names := []string{SesameRbacName, EnvoyRbacName, CertGenRbacName}
certSvcAct := &corev1.ServiceAccount{}
for _, name := range names {
svcAct, err := objsa.EnsureServiceAccount(ctx, cli, name, sesame)
if err != nil {
return fmt.Errorf("failed to ensure service account %s/%s: %w", ns, name, err)
}
if svcAct.Name == CertGenRbacName {
certSvcAct = svcAct
}
}
// ClusterRole and ClusterRoleBinding resources are namespace-named to allow ownership
// from individual instances of Sesame.
nsName := fmt.Sprintf("%s-%s", SesameRbacName, sesame.Spec.Namespace.Name)
cr, err := objcr.EnsureClusterRole(ctx, cli, nsName, sesame)
if err != nil {
return fmt.Errorf("failed to ensure cluster role %s: %w", SesameRbacName, err)
}
if err := objcrb.EnsureClusterRoleBinding(ctx, cli, nsName, cr.Name, SesameRbacName, sesame); err != nil {
return fmt.Errorf("failed to ensure cluster role binding %s: %w", SesameRbacName, err)
}
certRole, err := objrole.EnsureRole(ctx, cli, CertGenRbacName, sesame)
if err != nil {
return fmt.Errorf("failed to ensure role %s/%s: %w", ns, CertGenRbacName, err)
}
if err := objrb.EnsureRoleBinding(ctx, cli, SesameRbacName, certSvcAct.Name, certRole.Name, sesame); err != nil {
return fmt.Errorf("failed to ensure role binding %s/%s: %w", ns, SesameRbacName, err)
}
return nil
}
// EnsureRBACDeleted ensures all the necessary RBAC resources for the provided
// sesame are deleted if Sesame owner labels exist.
func EnsureRBACDeleted(ctx context.Context, cli client.Client, Sesame *operatorv1alpha1.Sesame) error {
var errs []error
ns := Sesame.Spec.Namespace.Name
objectsToDelete := []client.Object{}
SesamesExist, err := objSesame.OtherSesamesExistInSpecNs(ctx, cli, Sesame)
if err != nil {
return fmt.Errorf("failed to verify if Sesames SesamesExist in namespace %s: %w",
Sesame.Spec.Namespace.Name, err)
}
if !SesamesExist {
cntrRoleBind, err := objrb.CurrentRoleBinding(ctx, cli, ns, SesameRbacName)
if err != nil {
if !errors.IsNotFound(err) {
return err
}
}
if cntrRoleBind != nil {
objectsToDelete = append(objectsToDelete, cntrRoleBind)
}
cntrRole, err := objrole.CurrentRole(ctx, cli, ns, SesameRbacName)
if err != nil {
if !errors.IsNotFound(err) {
return err
}
}
if cntrRole != nil {
objectsToDelete = append(objectsToDelete, cntrRole)
}
certRole, err := objrole.CurrentRole(ctx, cli, ns, CertGenRbacName)
if err != nil {
if !errors.IsNotFound(err) {
return err
}
}
if certRole != nil {
objectsToDelete = append(objectsToDelete, certRole)
}
names := []string{SesameRbacName, EnvoyRbacName, CertGenRbacName}
for _, name := range names {
svcAct, err := objsa.CurrentServiceAccount(ctx, cli, ns, name)
if err != nil {
if !errors.IsNotFound(err) {
return err
}
}
if svcAct != nil {
objectsToDelete = append(objectsToDelete, svcAct)
}
}
}
SesamesExist, _, err = objSesame.OtherSesamesExist(ctx, cli, Sesame)
if err != nil {
return fmt.Errorf("failed to verify if Sesames exist in any namespace: %w", err)
}
if !SesamesExist {
// ClusterRole and ClusterRoleBinding resources are namespace-named to allow ownership
// from individual instances of Sesame.
nsName := fmt.Sprintf("%s-%s", SesameRbacName, Sesame.Spec.Namespace.Name)
crb, err := objcrb.CurrentClusterRoleBinding(ctx, cli, nsName)
if err != nil {
if !errors.IsNotFound(err) {
return err
}
}
if crb != nil {
objectsToDelete = append(objectsToDelete, crb)
}
cr, err := objcr.CurrentClusterRole(ctx, cli, nsName)
if err != nil {
if !errors.IsNotFound(err) {
return err
}
}
if cr != nil {
objectsToDelete = append(objectsToDelete, cr)
}
}
for _, object := range objectsToDelete {
kind := object.GetObjectKind().GroupVersionKind().Kind
namespace := object.(metav1.Object).GetNamespace()
name := object.(metav1.Object).GetName()
if labels.Exist(object, objSesame.OwnerLabels(Sesame)) {
if err := cli.Delete(ctx, object); err != nil {
if errors.IsNotFound(err) {
continue
}
return fmt.Errorf("failed to delete %s %s/%s: %w", kind, namespace, name, err)
}
}
}
return utilerrors.NewAggregate(errs)
}