forked from kubermatic/kubermatic
/
service_account_binding_controller.go
173 lines (149 loc) · 5.23 KB
/
service_account_binding_controller.go
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/*
Copyright 2020 The Kubermatic Kubernetes Platform contributors.
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 serviceaccount
import (
"context"
"fmt"
"strings"
kubermaticv1 "github.com/kubermatic/kubermatic/api/pkg/crd/kubermatic/v1"
"github.com/kubermatic/kubermatic/api/pkg/log"
serviceaccount "github.com/kubermatic/kubermatic/api/pkg/provider/kubernetes"
kerrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/rand"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
const controllerName = "kubermatic_serviceaccount_projectbinding_controller"
func Add(mgr manager.Manager) error {
r := &reconcileServiceAccountProjectBinding{Client: mgr.GetClient(), ctx: context.TODO()}
// Create a new controller
c, err := controller.New(controllerName, mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to User
err = c.Watch(&source.Kind{Type: &kubermaticv1.User{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
return nil
}
// reconcileServiceAccountProjectBinding reconciles User objects
type reconcileServiceAccountProjectBinding struct {
ctx context.Context
client.Client
}
func (r *reconcileServiceAccountProjectBinding) Reconcile(request reconcile.Request) (reconcile.Result, error) {
resourceName := request.Name
if !strings.HasPrefix(resourceName, "serviceaccount") {
return reconcile.Result{}, nil
}
if err := r.ensureServiceAccountProjectBinding(resourceName); err != nil {
logger := log.Logger.With("controller", controllerName)
logger.Errorw("failed to reconcile in controller", "error", err)
return reconcile.Result{}, err
}
return reconcile.Result{}, nil
}
func (r *reconcileServiceAccountProjectBinding) ensureServiceAccountProjectBinding(saName string) error {
sa := &kubermaticv1.User{}
if err := r.Get(r.ctx, client.ObjectKey{Namespace: metav1.NamespaceAll, Name: saName}, sa); err != nil {
if kerrors.IsNotFound(err) {
return nil
}
return err
}
// get project name from Owner Reference or from label
projectName := ""
for _, owner := range sa.GetOwnerReferences() {
if owner.APIVersion == kubermaticv1.SchemeGroupVersion.String() && owner.Kind == kubermaticv1.ProjectKindName &&
len(owner.Name) > 0 && len(owner.UID) > 0 {
projectName = owner.Name
break
}
}
if len(projectName) == 0 {
projectName = sa.GetLabels()[kubermaticv1.ProjectIDLabelKey]
}
if len(projectName) == 0 {
return fmt.Errorf("unable to find owing project for the service account = %s", sa.Name)
}
labelSelector, err := labels.Parse(fmt.Sprintf("%s=%s", kubermaticv1.ProjectIDLabelKey, projectName))
if err != nil {
return err
}
bindings := &kubermaticv1.UserProjectBindingList{}
if err := r.List(r.ctx, bindings, &client.ListOptions{LabelSelector: labelSelector}); err != nil {
return err
}
bindingExist := false
var existingBinding kubermaticv1.UserProjectBinding
for _, binding := range bindings.Items {
if binding.Spec.ProjectID == projectName && strings.EqualFold(binding.Spec.UserEmail, sa.Spec.Email) {
bindingExist = true
existingBinding = binding
break
}
}
if bindingExist {
group, ok := sa.Labels[serviceaccount.ServiceAccountLabelGroup]
if ok {
existingBinding.Spec.Group = group
if err := r.Update(r.ctx, &existingBinding); err != nil {
return err
}
}
} else if err := r.createBinding(sa, projectName); err != nil {
return err
}
// remove labelGroup from sa
if _, ok := sa.Labels[serviceaccount.ServiceAccountLabelGroup]; ok {
delete(sa.Labels, serviceaccount.ServiceAccountLabelGroup)
if err := r.Update(r.ctx, sa); err != nil {
return err
}
}
return nil
}
func (r *reconcileServiceAccountProjectBinding) createBinding(sa *kubermaticv1.User, projectName string) error {
group, ok := sa.Labels[serviceaccount.ServiceAccountLabelGroup]
if !ok {
return fmt.Errorf("label %s not found for sa %s", serviceaccount.ServiceAccountLabelGroup, sa.Name)
}
binding := &kubermaticv1.UserProjectBinding{
ObjectMeta: metav1.ObjectMeta{
OwnerReferences: []metav1.OwnerReference{
{
APIVersion: kubermaticv1.SchemeGroupVersion.String(),
Kind: kubermaticv1.UserKindName,
UID: sa.GetUID(),
Name: sa.Name,
},
},
Name: rand.String(10),
Labels: map[string]string{kubermaticv1.ProjectIDLabelKey: projectName},
},
Spec: kubermaticv1.UserProjectBindingSpec{
ProjectID: projectName,
UserEmail: sa.Spec.Email,
Group: group,
},
}
return r.Create(r.ctx, binding)
}