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defaultrolebindings.go
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defaultrolebindings.go
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package defaultrolebindings
import (
"fmt"
"time"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/labels"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
coreinformers "k8s.io/client-go/informers/core/v1"
rbacinformers "k8s.io/client-go/informers/rbac/v1"
rbacclient "k8s.io/client-go/kubernetes/typed/rbac/v1"
corelisters "k8s.io/client-go/listers/core/v1"
rbaclisters "k8s.io/client-go/listers/rbac/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"k8s.io/kubernetes/pkg/controller"
"github.com/golang/glog"
"github.com/openshift/origin/pkg/cmd/server/bootstrappolicy"
)
var defaultRoleBindingNames = bootstrappolicy.GetBootstrapServiceAccountProjectRoleBindingNames()
// DefaultRoleBindingController is a controller to combine cluster roles
type DefaultRoleBindingController struct {
roleBindingClient rbacclient.RoleBindingsGetter
roleBindingLister rbaclisters.RoleBindingLister
roleBindingSynced cache.InformerSynced
namespaceLister corelisters.NamespaceLister
namespaceSynced cache.InformerSynced
syncHandler func(namespace string) error
queue workqueue.RateLimitingInterface
}
// NewDefaultRoleBinding creates a new controller
func NewDefaultRoleBindingsController(roleBindingInformer rbacinformers.RoleBindingInformer, namespaceInformer coreinformers.NamespaceInformer, roleBindingClient rbacclient.RoleBindingsGetter) *DefaultRoleBindingController {
c := &DefaultRoleBindingController{
roleBindingClient: roleBindingClient,
roleBindingLister: roleBindingInformer.Lister(),
roleBindingSynced: roleBindingInformer.Informer().HasSynced,
namespaceLister: namespaceInformer.Lister(),
namespaceSynced: namespaceInformer.Informer().HasSynced,
queue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "DefaultRoleBindingsController"),
}
c.syncHandler = c.syncNamespace
roleBindingInformer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: func(obj interface{}) bool {
metadata, err := meta.Accessor(obj)
if err != nil {
return false
}
return defaultRoleBindingNames.Has(metadata.GetName())
},
Handler: cache.ResourceEventHandlerFuncs{
DeleteFunc: func(uncast interface{}) {
metadata, err := meta.Accessor(uncast)
if err == nil {
c.queue.Add(metadata.GetNamespace())
return
}
tombstone, ok := uncast.(cache.DeletedFinalStateUnknown)
if !ok {
utilruntime.HandleError(fmt.Errorf("couldn't get object from tombstone %#v", uncast))
return
}
metadata, err = meta.Accessor(tombstone.Obj)
if err != nil {
utilruntime.HandleError(err)
return
}
c.queue.Add(metadata.GetNamespace())
},
},
})
namespaceInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
metadata, err := meta.Accessor(obj)
if err != nil {
utilruntime.HandleError(err)
return
}
c.queue.Add(metadata.GetName())
},
})
return c
}
func (c *DefaultRoleBindingController) syncNamespace(namespaceName string) error {
namespace, err := c.namespaceLister.Get(namespaceName)
if errors.IsNotFound(err) {
return nil
}
if err != nil {
return err
}
if namespace.DeletionTimestamp != nil {
return nil
}
roleBindings, err := c.roleBindingLister.RoleBindings(namespaceName).List(labels.Everything())
if err != nil {
return err
}
errs := []error{}
desiredRoleBindings := bootstrappolicy.GetBootstrapServiceAccountProjectV1RoleBindings(namespaceName)
for i := range desiredRoleBindings {
desiredRoleBinding := desiredRoleBindings[i]
found := false
for _, existingRoleBinding := range roleBindings {
if existingRoleBinding.Name == desiredRoleBinding.Name {
found = true
break
}
}
if found {
continue
}
_, err := c.roleBindingClient.RoleBindings(namespaceName).Create(&desiredRoleBinding)
if err != nil && !errors.IsAlreadyExists(err) {
errs = append(errs, err)
}
}
if len(errs) == 0 {
return nil
}
if len(errs) == 1 {
return errs[0]
}
return utilerrors.NewAggregate(errs)
}
// Run starts the controller and blocks until stopCh is closed.
func (c *DefaultRoleBindingController) Run(workers int, stopCh <-chan struct{}) {
defer utilruntime.HandleCrash()
defer c.queue.ShutDown()
glog.Infof("Starting DefaultRoleBindingController")
defer glog.Infof("Shutting down DefaultRoleBindingController")
if !controller.WaitForCacheSync("DefaultRoleBindingController", stopCh, c.roleBindingSynced, c.namespaceSynced) {
return
}
for i := 0; i < workers; i++ {
go wait.Until(c.runWorker, time.Second, stopCh)
}
<-stopCh
}
func (c *DefaultRoleBindingController) runWorker() {
for c.processNextWorkItem() {
}
}
func (c *DefaultRoleBindingController) processNextWorkItem() bool {
dsKey, quit := c.queue.Get()
if quit {
return false
}
defer c.queue.Done(dsKey)
err := c.syncHandler(dsKey.(string))
if err == nil {
c.queue.Forget(dsKey)
return true
}
utilruntime.HandleError(fmt.Errorf("%v failed with : %v", dsKey, err))
c.queue.AddRateLimited(dsKey)
return true
}