storageclusterpeer: setup the reconciler

Signed-off-by: Rewant Soni <[email protected]>

config/rbac/role.yaml

@@ -166,6 +166,12 @@ rules:
   verbs:
   - delete
   - list
+- apiGroups:
+  - ""
+  resources:
+  - secrets
+  verbs:
+  - get
 - apiGroups:
   - k8s.cni.cncf.io
   resources:

controllers/storageclusterpeer/storageclusterpeer_controller.go

@@ -18,45 +18,285 @@ package storageclusterpeer
 
 import (
 	"context"
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"time"
 
+	"github.com/go-logr/logr"
+	ocsv1 "github.com/red-hat-storage/ocs-operator/api/v4/v1"
+	"github.com/red-hat-storage/ocs-operator/v4/controllers/util"
+	providerClient "github.com/red-hat-storage/ocs-operator/v4/services/provider/client"
+	rookCephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/klog/v2"
 	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/log"
+	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
+	"sigs.k8s.io/controller-runtime/pkg/handler"
+	ctrllog "sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+)
 
-	ocsv1 "github.com/red-hat-storage/ocs-operator/api/v4/v1"
+const (
+	rbdMirrorBootstrapPeerSecretName = "rbdMirrorBootstrapPeerSecretName"
 )
 
 // StorageClusterPeerReconciler reconciles a StorageClusterPeer object
+// nolint:revive
 type StorageClusterPeerReconciler struct {
 	client.Client
 	Scheme *runtime.Scheme
+	Log    logr.Logger
+
+	ctx                context.Context
+	storageClusterPeer *ocsv1.StorageClusterPeer
+	cephBlockPoolList  *rookCephv1.CephBlockPoolList
+	clusterID          string
+	ocsClient          *providerClient.OCSProviderClient
 }
 
 //+kubebuilder:rbac:groups=ocs.openshift.io,resources=storageclusterpeers,verbs=get;list;watch;create;update;patch;delete
 //+kubebuilder:rbac:groups=ocs.openshift.io,resources=storageclusterpeers/status,verbs=get;update;patch
 //+kubebuilder:rbac:groups=ocs.openshift.io,resources=storageclusterpeers/finalizers,verbs=update
+//+kubebuilder:rbac:groups=ceph.rook.io,resources=cephblockpools;,verbs=list;create;update
+//+kubebuilder:rbac:groups=core,resources=secrets,verbs=get
 
 // Reconcile is part of the main kubernetes reconciliation loop which aims to
 // move the current state of the cluster closer to the desired state.
-// TODO(user): Modify the Reconcile function to compare the state specified by
-// the StorageClusterPeer object against the actual cluster state, and then
-// perform operations to make the cluster state reflect the state specified by
-// the user.
 //
 // For more details, check Reconcile and its Result here:
 // - https://pkg.go.dev/sigs.k8s.io/[email protected]/pkg/reconcile
-func (r *StorageClusterPeerReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
-	_ = log.FromContext(ctx)
+func (r *StorageClusterPeerReconciler) Reconcile(ctx context.Context, request ctrl.Request) (ctrl.Result, error) {
+
+	r.ctx = ctrllog.IntoContext(ctx, r.Log)
+	r.Log.Info("Reconciling StorageClusterPeer.")
+
+	// Fetch the StorageClusterPeer instance
+	r.storageClusterPeer = &ocsv1.StorageClusterPeer{}
+	r.storageClusterPeer.Name = request.Name
+	r.storageClusterPeer.Namespace = request.Namespace
+
+	if err := r.get(r.storageClusterPeer); err != nil {
+		if errors.IsNotFound(err) {
+			r.Log.Info("StorageClusterPeer resource not found. Ignoring since object must be deleted.")
+			return reconcile.Result{}, nil
+		}
+		r.Log.Error(err, "Failed to get StorageClusterPeer.")
+		return reconcile.Result{}, err
+	}
+
+	r.storageClusterPeer.Status.Phase = ocsv1.StorageClusterPeerInitializing
+
+	r.cephBlockPoolList = &rookCephv1.CephBlockPoolList{}
+	if err := r.list(r.cephBlockPoolList, client.InNamespace(r.storageClusterPeer.Namespace)); err != nil {
+		return reconcile.Result{}, err
+	}
+
+	r.clusterID = util.GetClusterID(r.ctx, r.Client, &r.Log)
+	if r.clusterID == "" {
+		err := fmt.Errorf("failed to get clusterID from the ClusterVersion CR")
+		r.Log.Error(err, "failed to get ClusterVersion of the OCP Cluster")
+		return reconcile.Result{}, err
+	}
+	var err error
+
+	r.ocsClient, err = r.newExternalClient()
+	if err != nil {
+		return reconcile.Result{}, err
+	}
+	defer r.ocsClient.Close()
+
+	var result reconcile.Result
+	var reconcileError error
+
+	result, reconcileError = r.reconcilePhases()
+
+	// Apply status changes to the StorageClusterPeer
+	statusError := r.Client.Status().Update(r.ctx, r.storageClusterPeer)
+	if statusError != nil {
+		r.Log.Info("Failed to update StorageClusterPeer status.")
+	}
 
-	// TODO(user): your logic here
+	// Reconcile errors have higher priority than status update errors
+	if reconcileError != nil {
+		return result, reconcileError
+	}
 
-	return ctrl.Result{}, nil
+	if statusError != nil {
+		return result, statusError
+	}
+
+	return result, nil
 }
 
 // SetupWithManager sets up the controller with the Manager.
 func (r *StorageClusterPeerReconciler) SetupWithManager(mgr ctrl.Manager) error {
+
+	enqueueStorageClusterPeerRequest := handler.EnqueueRequestsFromMapFunc(
+		func(ctx context.Context, obj client.Object) []reconcile.Request {
+			// Get the StorageClusterPeer objects
+			scpList := &ocsv1.StorageClusterPeerList{}
+			err := r.Client.List(ctx, scpList, &client.ListOptions{Namespace: obj.GetNamespace()})
+			if err != nil {
+				r.Log.Error(err, "Unable to list StorageClusterPeer objects")
+				return []reconcile.Request{}
+			}
+
+			// Return name and namespace of the StorageClusterPeers object
+			request := []reconcile.Request{}
+			for _, scp := range scpList.Items {
+				request = append(request, reconcile.Request{
+					NamespacedName: types.NamespacedName{
+						Namespace: scp.Namespace,
+						Name:      scp.Name,
+					},
+				})
+			}
+
+			return request
+		},
+	)
+
 	return ctrl.NewControllerManagedBy(mgr).
-		For(&ocsv1.StorageClusterPeer{}).
+		For(&ocsv1.StorageClusterPeer{}, builder.WithPredicates(predicate.GenerationChangedPredicate{})).
+		Watches(&rookCephv1.CephBlockPool{}, enqueueStorageClusterPeerRequest).
 		Complete(r)
 }
+
+func (r *StorageClusterPeerReconciler) reconcilePhases() (reconcile.Result, error) {
+	r.Log.Info("Running StorageClusterPeer controller")
+
+	//marked for deletion
+	if !r.storageClusterPeer.GetDeletionTimestamp().IsZero() {
+		r.storageClusterPeer.Status.Phase = ocsv1.StorageClusterPeerDeleting
+
+		if err := r.reconcileRevokeBlockPoolPeering(); err != nil {
+			return reconcile.Result{}, err
+		}
+
+		//remove finalizer
+		r.Log.Info("removing finalizer from the StorageClusterPeer resource")
+		controllerutil.RemoveFinalizer(r.storageClusterPeer, ocsv1.StorageClusterPeerFinalizer)
+		r.Log.Info("finalizer removed successfully")
+		return reconcile.Result{}, nil
+	}
+	//not marked for deletion
+
+	// add finalizer
+	controllerutil.AddFinalizer(r.storageClusterPeer, ocsv1.StorageClusterPeerFinalizer)
+
+	r.storageClusterPeer.Status.Phase = ocsv1.StorageClusterPeerConfiguring
+
+	if err := r.reconcileLocalBlockPools(); err != nil {
+		return reconcile.Result{}, err
+	}
+
+	if err := r.reconcilePeerBlockPools(); err != nil {
+		return reconcile.Result{}, err
+	}
+
+	r.storageClusterPeer.Status.Phase = ocsv1.StorageClusterPeerReady
+
+	return reconcile.Result{}, nil
+}
+
+func (r *StorageClusterPeerReconciler) newExternalClient() (*providerClient.OCSProviderClient, error) {
+	ocsClient, err := providerClient.NewProviderClient(r.ctx, r.storageClusterPeer.Spec.OCSAPIServerURI, time.Second*10)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create a new ocs client: %v", err)
+	}
+	return ocsClient, nil
+}
+
+func (r *StorageClusterPeerReconciler) reconcileLocalBlockPools() error {
+
+	for _, cephBlockPool := range r.cephBlockPoolList.Items {
+
+		_, err := ctrl.CreateOrUpdate(r.ctx, r.Client, &cephBlockPool, func() error {
+			cephBlockPool.Spec.Mirroring.Enabled = true
+			cephBlockPool.Spec.Mirroring.Mode = "image"
+			return nil
+		})
+		if err != nil {
+			r.Log.Error(err, "unable to enable mirroring on the cephBlockPool",
+				"CephBlockPool", klog.KRef(cephBlockPool.Namespace, cephBlockPool.Name))
+			return err
+		}
+	}
+	return nil
+}
+
+func (r *StorageClusterPeerReconciler) reconcilePeerBlockPools() error {
+
+	for _, cephBlockPool := range r.cephBlockPoolList.Items {
+
+		if cephBlockPool.Status.Info == nil || cephBlockPool.Status.Info[rbdMirrorBootstrapPeerSecretName] == "" {
+			r.Log.Info("waiting for bootstrap secret to be generated",
+				"CephBlockPool", klog.KRef(cephBlockPool.Namespace, cephBlockPool.Name))
+			return fmt.Errorf("waiting for bootstrap secret for %s blockpool in %s namespace to be generated",
+				cephBlockPool.Name, cephBlockPool.Namespace)
+		}
+
+		secret := &v1.Secret{}
+		secret.Name = cephBlockPool.Status.Info[rbdMirrorBootstrapPeerSecretName]
+		secret.Namespace = cephBlockPool.Namespace
+
+		if err := r.get(secret); err != nil {
+			r.Log.Error(err, "unable to fetch the bootstrap secret for blockPool",
+				"CephBlockPool", klog.KRef(cephBlockPool.Namespace, cephBlockPool.Name))
+			return err
+		}
+
+		_, err := r.ocsClient.PeerBlockPool(r.ctx, generateSecretName(cephBlockPool.Name, r.clusterID), secret.Data["pool"], secret.Data["token"])
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (r *StorageClusterPeerReconciler) reconcileRevokeBlockPoolPeering() error {
+
+	for _, cephBlockPool := range r.cephBlockPoolList.Items {
+
+		_, err := r.ocsClient.RevokeBlockPoolPeering(r.ctx, generateSecretName(cephBlockPool.Name, r.clusterID), []byte(cephBlockPool.Name))
+		if err != nil {
+			return err
+		}
+
+		_, err = ctrl.CreateOrUpdate(r.ctx, r.Client, &cephBlockPool, func() error {
+			// if bootstrap secret is set then it might be used as a backup for some other cluster
+			if cephBlockPool.Spec.Mirroring.Peers == nil || len(cephBlockPool.Spec.Mirroring.Peers.SecretNames) == 0 {
+				cephBlockPool.Spec.Mirroring.Enabled = false
+				cephBlockPool.Spec.Mirroring.Mode = ""
+			}
+			return nil
+		})
+		if err != nil {
+			r.Log.Error(err, "unable to disable mirroring on the cephBlockPool",
+				"CephBlockPool", klog.KRef(cephBlockPool.Namespace, cephBlockPool.Name))
+			return err
+		}
+	}
+	return nil
+}
+
+func (r *StorageClusterPeerReconciler) get(obj client.Object) error {
+	key := client.ObjectKeyFromObject(obj)
+	return r.Client.Get(r.ctx, key, obj)
+}
+
+func (r *StorageClusterPeerReconciler) list(obj client.ObjectList, listOptions ...client.ListOption) error {
+	return r.Client.List(r.ctx, obj, listOptions...)
+}
+
+func generateSecretName(poolName, clusterID string) string {
+	md5Sum := md5.Sum([]byte(fmt.Sprintf("%s-%s", poolName, clusterID)))
+	return fmt.Sprintf("bootstrap-secret-%s", hex.EncodeToString(md5Sum[:16]))
+}

deploy/csv-templates/ocs-operator.csv.yaml.in

@@ -336,6 +336,12 @@ spec:
           verbs:
           - delete
           - list
+        - apiGroups:
+          - ""
+          resources:
+          - secrets
+          verbs:
+          - get
         - apiGroups:
           - k8s.cni.cncf.io
           resources:

deploy/ocs-operator/manifests/ocs-operator.clusterserviceversion.yaml

@@ -346,6 +346,12 @@ spec:
           verbs:
           - delete
           - list
+        - apiGroups:
+          - ""
+          resources:
+          - secrets
+          verbs:
+          - get
         - apiGroups:
           - k8s.cni.cncf.io
           resources:

main.go

@@ -65,7 +65,6 @@ import (
 	apiclient "sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/log/zap"
 	metrics "sigs.k8s.io/controller-runtime/pkg/metrics/server"
-
 	// +kubebuilder:scaffold:imports
 )
 
@@ -219,13 +218,16 @@ func main() {
 		setupLog.Error(err, "unable to create controller", "controller", "StorageClassRequest")
 		os.Exit(1)
 	}
+
 	if err = (&storageclusterpeer.StorageClusterPeerReconciler{
 		Client: mgr.GetClient(),
 		Scheme: mgr.GetScheme(),
+		Log:    ctrl.Log.WithName("controllers").WithName("StorageClusterPeer"),
 	}).SetupWithManager(mgr); err != nil {
 		setupLog.Error(err, "unable to create controller", "controller", "StorageClusterPeer")
 		os.Exit(1)
 	}
+
 	// +kubebuilder:scaffold:builder
 
 	// Create OCSInitialization CR if it's not present