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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 +1,208 @@ | ||
| package controller | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "k8s.io/apimachinery/pkg/api/meta" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "time" | ||
|
|
||
| "github.com/red-hat-storage/ocs-client-operator/api/v1alpha1" | ||
|
|
||
| "github.com/go-logr/logr" | ||
| ramenv1alpha1 "github.com/ramendr/ramen/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" | ||
| ) | ||
|
|
||
| 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 | ||
| Scheme *runtime.Scheme | ||
|
|
||
| log logr.Logger | ||
| ctx context.Context | ||
| } | ||
|
|
||
| // SetupWithManager sets up the controller with the Manager. | ||
| func (r *MaintenanceModeReconciler) SetupWithManager(mgr ctrl.Manager) error { | ||
| generationChangePredicate := predicate.GenerationChangedPredicate{} | ||
| return ctrl.NewControllerManagedBy(mgr). | ||
| For(&ramenv1alpha1.MaintenanceMode{}, builder.WithPredicates(generationChangePredicate)). | ||
| Watches( | ||
| &storagev1.StorageClass{}, | ||
| &handler.EnqueueRequestForObject{}, | ||
| builder.WithPredicates(generationChangePredicate), | ||
| ). | ||
| Watches( | ||
| &v1alpha1.StorageClient{}, | ||
| &handler.EnqueueRequestForObject{}, | ||
| builder.WithPredicates(generationChangePredicate), | ||
| ). | ||
| Complete(r) | ||
| } | ||
|
|
||
| //+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") | ||
|
|
||
| maintenanceMode := &ramenv1alpha1.MaintenanceMode{} | ||
| maintenanceMode.Name = req.Name | ||
| if err := r.get(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 | ||
| } | ||
|
|
||
| // find the storageClass with the targetID | ||
| storageClassList := &storagev1.StorageClassList{} | ||
| err := r.list(storageClassList, client.MatchingLabels{ramenReplicationIDLabel: maintenanceMode.Spec.TargetID}) | ||
| if err != nil { | ||
| return ctrl.Result{}, err | ||
| } | ||
| if len(storageClassList.Items) != 1 { | ||
| return ctrl.Result{}, fmt.Errorf("failed to find storageClass for maintenance mode") | ||
| } | ||
|
|
||
| storageClass := &storageClassList.Items[0] | ||
|
|
||
| // find the storageClient | ||
| // TODO: when storageClass is owned by storageClient, move to find the Client by ownerRef | ||
| storageClient := &v1alpha1.StorageClient{} | ||
| storageClient.Name = storageClass.GetLabels()[storageClientLabel] | ||
| err = r.get(storageClient) | ||
| if err != nil { | ||
| return ctrl.Result{}, fmt.Errorf("failed to get the storage client: %v", err) | ||
| } | ||
|
|
||
| result, reconcileErr := r.reconcilePhases(maintenanceMode, storageClient) | ||
|
|
||
| // Apply status changes to the StorageClient | ||
| statusErr := r.Client.Status().Update(ctx, maintenanceMode) | ||
| if statusErr != nil { | ||
| r.log.Error(statusErr, "Failed to update MaintenanceMode status.") | ||
| } | ||
| if reconcileErr != nil { | ||
| err = reconcileErr | ||
| } else if statusErr != nil { | ||
| err = statusErr | ||
| } | ||
| return result, err | ||
| } | ||
|
|
||
| func (r *MaintenanceModeReconciler) reconcilePhases(maintenanceMode *ramenv1alpha1.MaintenanceMode, storageClient *v1alpha1.StorageClient) (ctrl.Result, error) { | ||
|
|
||
| // ensure finalizer | ||
| if controllerutil.AddFinalizer(maintenanceMode, maintenanceModeFinalizer) { | ||
| r.log.Info("finalizer missing on the Maintenance Mode resource, adding...") | ||
| if err := r.Client.Update(r.ctx, maintenanceMode); err != nil { | ||
| return ctrl.Result{}, err | ||
| } | ||
| } | ||
|
|
||
| if !storageClient.Status.InMaintenanceMode { | ||
| providerClient, err := providerclient.NewProviderClient( | ||
| r.ctx, | ||
| storageClient.Spec.StorageProviderEndpoint, | ||
| 10*time.Second, | ||
| ) | ||
| if err != nil { | ||
| return reconcile.Result{}, fmt.Errorf( | ||
| "failed to create provider client with endpoint %v: %v", | ||
| storageClient.Spec.StorageProviderEndpoint, | ||
| err, | ||
| ) | ||
| } | ||
| // Close client-side connections. | ||
| defer providerClient.Close() | ||
|
|
||
| _, err = providerClient.RequestMaintenanceMode(r.ctx, storageClient.Status.ConsumerID, true) | ||
| if err != nil { | ||
| return ctrl.Result{}, fmt.Errorf("failed to Request maintenance mode: %v", err) | ||
| } | ||
| maintenanceMode.Status.State = ramenv1alpha1.MModeStateUnknown | ||
| return ctrl.Result{Requeue: true}, nil | ||
| } | ||
|
|
||
| // Ramen reads the State and Conditions in order to determine that the MaintenanceMode is Completed | ||
| maintenanceMode.Status.State = ramenv1alpha1.MModeStateCompleted | ||
| maintenanceMode.Status.ObservedGeneration = maintenanceMode.Generation | ||
| meta.SetStatusCondition(&maintenanceMode.Status.Conditions, | ||
| metav1.Condition{ | ||
| Type: string(ramenv1alpha1.MModeConditionFailoverActivated), | ||
| ObservedGeneration: maintenanceMode.Generation, | ||
| Reason: string(ramenv1alpha1.MModeStateCompleted), | ||
| Status: metav1.ConditionTrue, | ||
| }, | ||
| ) | ||
|
|
||
| if !maintenanceMode.GetDeletionTimestamp().IsZero() { | ||
| // deletion phase | ||
| if storageClient.Status.InMaintenanceMode { | ||
| providerClient, err := providerclient.NewProviderClient( | ||
| r.ctx, | ||
| storageClient.Spec.StorageProviderEndpoint, | ||
| 10*time.Second, | ||
| ) | ||
| if err != nil { | ||
| return reconcile.Result{}, fmt.Errorf( | ||
| "failed to create provider client with endpoint %v: %v", | ||
| storageClient.Spec.StorageProviderEndpoint, | ||
| err, | ||
| ) | ||
| } | ||
| // Close client-side connections. | ||
| defer providerClient.Close() | ||
|
|
||
| _, err = providerClient.RequestMaintenanceMode(r.ctx, storageClient.Status.ConsumerID, false) | ||
| if err != nil { | ||
| return ctrl.Result{}, fmt.Errorf("failed to disable maintenance mode: %v", err) | ||
| } | ||
| return ctrl.Result{Requeue: true}, nil | ||
| } | ||
|
|
||
| // remove finalizer | ||
| if controllerutil.RemoveFinalizer(maintenanceMode, maintenanceModeFinalizer) { | ||
| if err := r.Client.Update(r.ctx, maintenanceMode); err != nil { | ||
| return ctrl.Result{}, err | ||
| } | ||
| r.log.Info("finalizer removed successfully") | ||
| } | ||
| } | ||
|
|
||
| return ctrl.Result{}, 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...) | ||
| } |
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