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controllers: new controller for maintenance mode
Signed-off-by: Rewant Soni <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,207 @@ | ||
| package controller | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/go-logr/logr" | ||
| ramenv1alpha1 "github.com/ramendr/ramen/api/v1alpha1" | ||
| "github.com/red-hat-storage/ocs-client-operator/api/v1alpha1" | ||
| providerclient "github.com/red-hat-storage/ocs-operator/services/provider/api/v4/client" | ||
| storagev1 "k8s.io/api/storage/v1" | ||
| kerrors "k8s.io/apimachinery/pkg/api/errors" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| "sigs.k8s.io/controller-runtime/pkg/builder" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" | ||
| "sigs.k8s.io/controller-runtime/pkg/handler" | ||
| "sigs.k8s.io/controller-runtime/pkg/log" | ||
| "sigs.k8s.io/controller-runtime/pkg/predicate" | ||
| "sigs.k8s.io/controller-runtime/pkg/reconcile" | ||
| "time" | ||
| ) | ||
|
|
||
| const ( | ||
| maintenanceModeFinalizer = "ocs-client-operator.ocs.openshift.io/maintenance-mode" | ||
| ramenReplicationIdLabel = "ramendr.openshift.io/replicationID" | ||
| MaintenanceModeCRDName = "maintenancemodes.ramendr.openshift.io" | ||
| ) | ||
|
|
||
| // MaintenanceModeReconciler reconciles a ClusterVersion object | ||
| type MaintenanceModeReconciler struct { | ||
| client.Client | ||
| OperatorNamespace string | ||
| Scheme *runtime.Scheme | ||
|
|
||
| log logr.Logger | ||
| ctx context.Context | ||
| maintenanceMode *ramenv1alpha1.MaintenanceMode | ||
| storageClass *storagev1.StorageClass | ||
| storageClient *v1alpha1.StorageClient | ||
| } | ||
|
|
||
| // SetupWithManager sets up the controller with the Manager. | ||
| func (r *MaintenanceModeReconciler) SetupWithManager(mgr ctrl.Manager) error { | ||
| generationChangePredicate := predicate.GenerationChangedPredicate{} | ||
| bldr := ctrl.NewControllerManagedBy(mgr). | ||
| For(&ramenv1alpha1.MaintenanceMode{}, builder.WithPredicates(generationChangePredicate)). | ||
| Watches(&storagev1.StorageClass{}, &handler.EnqueueRequestForObject{}). | ||
| Watches(&v1alpha1.StorageClient{}, &handler.EnqueueRequestForObject{}) | ||
|
|
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| return bldr.Complete(r) | ||
| } | ||
|
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| //+kubebuilder:rbac:groups=ramendr.openshift.io,resources=maintenancemodes,verbs=get;list;update;create;watch;delete | ||
| //+kubebuilder:rbac:groups=ramendr.openshift.io,resources=maintenancemodes/status,verbs=get;update;patch | ||
| //+kubebuilder:rbac:groups=ramendr.openshift.io,resources=maintenancemodes/finalizers,verbs=update | ||
| //+kubebuilder:rbac:groups=ocs.openshift.io,resources=storageclients,verbs=get;list;watch | ||
| //+kubebuilder:rbac:groups=storage.k8s.io,resources=storageclasses,verbs=get;list;watch | ||
|
|
||
| func (r *MaintenanceModeReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { | ||
| r.ctx = ctx | ||
| r.log = log.FromContext(ctx, "MaintenanceMode", req) | ||
| r.log.Info("Reconciling MaintenanceMode") | ||
|
|
||
| r.maintenanceMode = &ramenv1alpha1.MaintenanceMode{} | ||
| r.maintenanceMode.Name = req.Name | ||
| if err := r.get(r.maintenanceMode); err != nil { | ||
| if kerrors.IsNotFound(err) { | ||
| r.log.Info("Maintenance Mode resource not found. Ignoring since object might be deleted.") | ||
| return reconcile.Result{}, nil | ||
| } | ||
| r.log.Error(err, "failed to get the Maintenance Mode") | ||
| return reconcile.Result{}, err | ||
| } | ||
|
|
||
| err := r.findStorageClassForMaintenanceMode() | ||
| if err != nil { | ||
| return ctrl.Result{}, fmt.Errorf("failed to find storageClass for maintenance mode: %v ", err) | ||
| } | ||
|
|
||
| // If no storageClass for the targetID found, exit | ||
| if r.storageClass == nil { | ||
| r.log.Info("no storage class found for the maintenance mode") | ||
| return reconcile.Result{}, nil | ||
| } | ||
|
|
||
| err = r.findStorageClientLinkedWithStorageClass() | ||
| if err != nil { | ||
| return ctrl.Result{}, fmt.Errorf("failed to find storageClient for maintenance mode: %v ", err) | ||
| } | ||
|
|
||
| providerClient, err := providerclient.NewProviderClient( | ||
| r.ctx, | ||
| r.storageClient.Spec.StorageProviderEndpoint, | ||
| 10*time.Second, | ||
| ) | ||
| if err != nil { | ||
| return reconcile.Result{}, fmt.Errorf("failed to create provider client with endpoint %v: %v", r.storageClient.Spec.StorageProviderEndpoint, err) | ||
| } | ||
| // Close client-side connections. | ||
| defer providerClient.Close() | ||
|
|
||
| if r.maintenanceMode.GetDeletionTimestamp().IsZero() { | ||
|
|
||
| //ensure finalizer | ||
| if controllerutil.AddFinalizer(r.maintenanceMode, maintenanceModeFinalizer) { | ||
| r.log.Info("finalizer missing on the Maintenance Mode resource, adding...") | ||
| if err := r.Client.Update(r.ctx, r.maintenanceMode); err != nil { | ||
| return ctrl.Result{}, err | ||
| } | ||
| } | ||
|
|
||
| if r.maintenanceMode.Status.State != "" { | ||
| _, err := providerClient.StartMaintenanceMode(r.ctx, r.storageClient.Status.ConsumerID) | ||
| if err != nil { | ||
| return ctrl.Result{}, fmt.Errorf("failed to start maintenance mode: %v", err) | ||
| } | ||
| r.maintenanceMode.Status.State = ramenv1alpha1.MModeStateUnknown | ||
| } | ||
| response, err := providerClient.GetMaintenanceModeStatus(r.ctx, r.storageClient.Status.ConsumerID) | ||
| if err != nil { | ||
| return ctrl.Result{}, fmt.Errorf("failed to get maintenance mode status: %v", err) | ||
| } | ||
| r.maintenanceMode.Status.State = ramenv1alpha1.MModeState(response.MaintenanceStatus) | ||
| } else { | ||
| // deletion phase | ||
| if err := r.deletionPhase(providerClient); err != nil { | ||
| return ctrl.Result{}, err | ||
| } | ||
|
|
||
| //remove finalizer | ||
| if controllerutil.RemoveFinalizer(r.maintenanceMode, maintenanceModeFinalizer) { | ||
| if err := r.Client.Update(r.ctx, r.maintenanceMode); err != nil { | ||
| return ctrl.Result{}, err | ||
| } | ||
| r.log.Info("finallizer removed successfully") | ||
| } | ||
| } | ||
| return ctrl.Result{}, nil | ||
| } | ||
|
|
||
| func (r *MaintenanceModeReconciler) deletionPhase(providerClient *providerclient.OCSProviderClient) error { | ||
| _, err := providerClient.StopMaintenanceMode(r.ctx, r.storageClient.Status.ConsumerID) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| response, err := providerClient.GetMaintenanceModeStatus(r.ctx, r.storageClient.Status.ConsumerID) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| r.maintenanceMode.Status.State = ramenv1alpha1.MModeState(response.MaintenanceStatus) | ||
| return nil | ||
| } | ||
|
|
||
| func (r *MaintenanceModeReconciler) findStorageClassForMaintenanceMode() error { | ||
| storageClassList := &storagev1.StorageClassList{} | ||
|
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||
| err := r.list(storageClassList) | ||
| if err != nil { | ||
| r.log.Error(err, "unable to list storage classes") | ||
| return err | ||
| } | ||
|
|
||
| for i := range storageClassList.Items { | ||
| storageClass := storageClassList.Items[i] | ||
| if storageClass.GetAnnotations()[ramenReplicationIdLabel] == r.maintenanceMode.Spec.TargetID { | ||
| r.storageClass = &storageClassList.Items[i] | ||
| return nil | ||
| } | ||
| } | ||
| return fmt.Errorf("failed to find storage class for maintenance mode %s", r.maintenanceMode.Spec.TargetID) | ||
| } | ||
|
|
||
| func (r *MaintenanceModeReconciler) findStorageClientLinkedWithStorageClass() error { | ||
| r.storageClient = &v1alpha1.StorageClient{} | ||
| val, ok := r.storageClass.GetAnnotations()[storageClientAnnotation] | ||
| if !ok { | ||
| return fmt.Errorf("no storage client linked to storage class %s", r.storageClass.Name) | ||
| } | ||
|
|
||
| r.storageClient.Name = val | ||
| err := r.get(r.storageClient) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to get the storage client: %v", err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (r *MaintenanceModeReconciler) get(obj client.Object, opts ...client.GetOption) error { | ||
| return r.Get(r.ctx, client.ObjectKeyFromObject(obj), obj, opts...) | ||
| } | ||
|
|
||
| func (r *MaintenanceModeReconciler) list(obj client.ObjectList, opts ...client.ListOption) error { | ||
| return r.List(r.ctx, obj, opts...) | ||
| } | ||
|
|
||
| func (r *MaintenanceModeReconciler) update(obj client.Object, opts ...client.UpdateOption) error { | ||
| return r.Update(r.ctx, obj, opts...) | ||
| } | ||
|
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||
| func (r *MaintenanceModeReconciler) delete(obj client.Object, opts ...client.DeleteOption) error { | ||
| if err := r.Delete(r.ctx, obj, opts...); err != nil && !kerrors.IsNotFound(err) { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
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