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localdisk_controller.go
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localdisk_controller.go
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package localdisk
import (
"github.com/hwameistor/hwameistor/pkg/local-disk-manager/handler/localdisk"
"github.com/hwameistor/hwameistor/pkg/local-disk-manager/utils"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/predicate"
v1alpha1 "github.com/hwameistor/hwameistor/pkg/apis/hwameistor/v1alpha1"
log "github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/record"
"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"
)
/**
* USER ACTION REQUIRED: This is a scaffold file intended for the user to modify with their own Controller
* business logic. Delete these comments after modifying this file.*
*/
// Add creates a new LocalDisk Controller and adds it to the Manager. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
func Add(mgr manager.Manager) error {
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
return &ReconcileLocalDisk{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
Recorder: mgr.GetEventRecorderFor("localdisk-controller"),
}
}
// withCurrentNode filter volume request for this node
func withCurrentNode() predicate.Predicate {
return predicate.Funcs{
CreateFunc: func(event event.CreateEvent) bool {
disk, _ := event.Object.DeepCopyObject().(*v1alpha1.LocalDisk)
return disk.Spec.NodeName == utils.GetNodeName()
},
DeleteFunc: func(deleteEvent event.DeleteEvent) bool {
disk, _ := deleteEvent.Object.DeepCopyObject().(*v1alpha1.LocalDisk)
return disk.Spec.NodeName == utils.GetNodeName()
},
UpdateFunc: func(updateEvent event.UpdateEvent) bool {
disk, _ := updateEvent.ObjectNew.DeepCopyObject().(*v1alpha1.LocalDisk)
return disk.Spec.NodeName == utils.GetNodeName()
},
GenericFunc: func(genericEvent event.GenericEvent) bool {
disk, _ := genericEvent.Object.DeepCopyObject().(*v1alpha1.LocalDisk)
return disk.Spec.NodeName == utils.GetNodeName()
},
}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New("localdisk-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource LocalDisk
err = c.Watch(&source.Kind{Type: &v1alpha1.LocalDisk{}}, &handler.EnqueueRequestForObject{}, withCurrentNode())
if err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcileLocalDisk implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileLocalDisk{}
// ReconcileLocalDisk reconciles a LocalDisk object
type ReconcileLocalDisk struct {
// This client, initialized using mgr.Client() above, is a split client
// that reads objects from the cache and writes to the apiserver
client.Client
Scheme *runtime.Scheme
Recorder record.EventRecorder
}
// Reconcile reads that state of the cluster for a LocalDisk object and makes changes based on the state read
// and what is in the LocalDisk.Spec
// TODO(user): Modify this Reconcile function to implement your Controller logic. This example creates
// a Pod as an example
// Note:
// The Controller will requeue the Request to be processed again if the returned error is non-nil or
// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
func (r *ReconcileLocalDisk) Reconcile(req reconcile.Request) (reconcile.Result, error) {
log.Infof("Reconcile LocalDisk %s", req.Name)
ldHandler := localdisk.NewLocalDiskHandler(r.Client, r.Recorder)
ld, err := ldHandler.GetLocalDisk(req.NamespacedName)
if err != nil {
if errors.IsNotFound(err) {
return reconcile.Result{}, nil
}
log.WithError(err).Errorf("Failed to get localdisk")
return reconcile.Result{}, err
}
if ld != nil {
ldHandler.For(*ld.DeepCopy())
} else {
// Not found
return reconcile.Result{}, nil
}
// NOTE: The control logic of localdisk should only respond to the update events of the disk itself.
// For example, if the disk smart check fails, it should update its health status at this time.
// As for the upper layer resources that depend on it, such as LDC, what it should do is to monitor
// the event changes of LD and adjust the changed contents accordingly.
// The connection between them should only be related to the state.
// Update status
if ldHandler.ClaimRef() != nil && ldHandler.UnClaimed() {
ldHandler.SetupStatus(v1alpha1.LocalDiskClaimed)
if err := ldHandler.UpdateStatus(); err != nil {
r.Recorder.Eventf(&ldHandler.Ld, v1.EventTypeWarning, "UpdateStatusFail", "Update status fail, due to error: %v", err)
log.WithError(err).Errorf("Update LocalDisk %v status fail", ldHandler.Ld.Name)
return reconcile.Result{}, err
}
}
// At this stage, we have no relevant inspection data, so we won't do any processing for the time being
return reconcile.Result{}, nil
}