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strategy_controller.go
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strategy_controller.go
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// Copyright Red Hat
package strategy
import (
"context"
"fmt"
"time"
// "time"
ocinfrav1 "github.com/openshift/api/config/v1"
giterrors "github.com/pkg/errors"
apiextensionsclient "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
// "k8s.io/client-go/util/retry"
ctrl "sigs.k8s.io/controller-runtime"
"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/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
"github.com/go-logr/logr"
identitatemv1alpha1 "github.com/identitatem/idp-client-api/api/identitatem/v1alpha1"
// identitatemdexserverv1alpha1 "github.com/identitatem/dex-operator/api/v1alpha1"
identitatemdexv1alpha1 "github.com/identitatem/dex-operator/api/v1alpha1"
clusterv1 "open-cluster-management.io/api/cluster/v1"
clusterv1alpha1 "open-cluster-management.io/api/cluster/v1alpha1"
workv1 "open-cluster-management.io/api/work/v1"
// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
// to ensure that exec-entrypoint and run can make use of them.
idpconfig "github.com/identitatem/idp-client-api/config"
//+kubebuilder:scaffold:imports
// clusteradmhelpers "open-cluster-management.io/clusteradm/pkg/helpers"
clusteradmapply "open-cluster-management.io/clusteradm/pkg/helpers/apply"
"github.com/identitatem/idp-mgmt-operator/pkg/helpers"
)
// StrategyReconciler reconciles a Strategy object
type StrategyReconciler struct {
client.Client
KubeClient kubernetes.Interface
DynamicClient dynamic.Interface
APIExtensionClient apiextensionsclient.Interface
Log logr.Logger
Scheme *runtime.Scheme
}
//+kubebuilder:rbac:groups=identityconfig.identitatem.io,resources={strategies},verbs=get;list;watch;update
//+kubebuilder:rbac:groups=identityconfig.identitatem.io,resources={strategies/finalizers},verbs=create;delete;patch;update
//+kubebuilder:rbac:groups=identityconfig.identitatem.io,resources={strategies/status},verbs=patch
//+kubebuilder:rbac:groups=cluster.open-cluster-management.io,resources={placements},verbs=get;list;watch;create;update;delete
// 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 Strategy 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/controller-runtime@v0.8.3/pkg/reconcile
func (r *StrategyReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
_ = context.Background()
_ = r.Log.WithValues("namespace", req.NamespacedName, "name", req.Name)
// your logic here
// Fetch the ManagedCluster instance
instance := &identitatemv1alpha1.Strategy{}
if err := r.Client.Get(
context.TODO(),
types.NamespacedName{Namespace: req.Namespace, Name: req.Name},
instance,
); err != nil {
if errors.IsNotFound(err) {
// Request object not found, could have been deleted after reconcile request.
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
r.Log.Info("Running Reconcile for Strategy.", "Name: ", instance.GetName(), " Namespace:", instance.GetNamespace())
if instance.DeletionTimestamp != nil {
if result, err := r.processStrategyDeletion(instance); err != nil || result.Requeue {
return result, err
}
controllerutil.RemoveFinalizer(instance, helpers.AuthrealmFinalizer)
if err := r.Client.Update(context.TODO(), instance); err != nil {
return ctrl.Result{}, giterrors.WithStack(err)
}
return reconcile.Result{}, nil
}
if err := r.processStrategyUpdate(instance); err != nil {
cond := metav1.Condition{
Type: identitatemv1alpha1.StrategyApplied,
Status: metav1.ConditionFalse,
Reason: "StrategyAppliedFailed",
Message: fmt.Sprintf("Strategy apply failed: %s", err.Error()),
}
if err := r.UpdateStrategyStatusConditions(instance, cond); err != nil {
return ctrl.Result{}, err
}
return reconcile.Result{}, err
}
cond := metav1.Condition{
Type: identitatemv1alpha1.StrategyApplied,
Status: metav1.ConditionTrue,
Reason: "StrategyAppliedSucceeded",
Message: "Strategy successfully applied",
}
if err := r.UpdateStrategyStatusConditions(instance, cond); err != nil {
return ctrl.Result{}, err
}
return ctrl.Result{}, nil
}
func (r *StrategyReconciler) processStrategyUpdate(strategy *identitatemv1alpha1.Strategy) error {
controllerutil.AddFinalizer(strategy, helpers.AuthrealmFinalizer)
r.Log.Info("Process", "Name", strategy.GetName(), "Namespace", strategy.GetNamespace())
if err := r.Client.Update(context.TODO(), strategy); err != nil {
return giterrors.WithStack(err)
}
// Get the AuthRealm Placement bits we need to help create a new Placement
r.Log.Info("Searching for AuthRealm in ownerRefs", "strategy", strategy.Name)
authRealm, err := helpers.GetAuthrealmFromStrategy(r.Client, strategy)
if err != nil {
return err
}
if authRealm.DeletionTimestamp != nil {
return nil
}
placement := &clusterv1alpha1.Placement{}
if err := r.Client.Get(context.TODO(), client.ObjectKey{Name: authRealm.Spec.PlacementRef.Name, Namespace: strategy.Namespace}, placement); err != nil {
if errors.IsNotFound(err) {
return r.deleteStrategyPlacement(authRealm.Spec.PlacementRef.Name, strategy.Namespace)
}
return err
}
//Get placementStrategy
placementStrategy, placementStrategyExists, err := r.getStrategyPlacement(strategy, authRealm, placement)
if err != nil {
return err
}
//Enrich placementStrategy
switch strategy.Spec.Type {
case identitatemv1alpha1.BackplaneStrategyType:
r.backplanePlacementStrategy(strategy, authRealm, placement, placementStrategy)
case identitatemv1alpha1.HypershiftStrategyType:
r.hypershiftPlacementStrategy(strategy, authRealm, placement, placementStrategy)
// case identitatemv1alpha1.GrcStrategyType:
// if err := r.grcPlacementStrategy(instance, authRealm, placement, placementStrategy); err != nil {
// return reconcile.Result{}, err
// }
default:
return fmt.Errorf("strategy type %s not supported", strategy.Spec.Type)
}
// update the Placement ref
strategy.Spec.PlacementRef.Name = placementStrategy.Name
if err := r.Client.Update(context.TODO(), strategy); err != nil {
return err
}
//Create or update placementStrategy
switch placementStrategyExists {
case true:
if err := r.Client.Update(context.TODO(), placementStrategy); err != nil {
return err
}
case false:
if err := r.Client.Create(context.TODO(), placementStrategy); err != nil {
return err
}
}
r.Log.Info("placementstrategy after update", "placementStrategy", placementStrategy)
return nil
}
//deleteStrategyPlacement deletes strategy placement related to a placement
func (r *StrategyReconciler) deleteStrategyPlacement(name, namespace string) error {
//Could be a user placement referenced in one or more strategy placement
//and so we have to delete the strategy placement
strategyPlacements := &clusterv1alpha1.PlacementList{}
err := r.Client.List(context.TODO(), strategyPlacements,
client.InNamespace(namespace),
client.MatchingLabels{
helpers.PlacementStrategyLabel: name,
})
if err != nil {
return err
}
for _, sp := range strategyPlacements.Items {
err := r.Client.Delete(context.TODO(), sp.DeepCopy(), &client.DeleteOptions{})
if err != nil && !errors.IsNotFound(err) {
return err
}
}
return nil
}
func (r *StrategyReconciler) getStrategyPlacement(strategy *identitatemv1alpha1.Strategy,
authRealm *identitatemv1alpha1.AuthRealm,
placement *clusterv1alpha1.Placement) (*clusterv1alpha1.Placement, bool, error) {
placementStrategy := &clusterv1alpha1.Placement{}
placementStrategyExists := true
placementStrategyName := helpers.PlacementStrategyName(strategy, authRealm)
if err := r.Client.Get(context.TODO(), client.ObjectKey{Name: placementStrategyName, Namespace: strategy.Namespace}, placementStrategy); err != nil {
if !errors.IsNotFound(err) {
return nil, false, err
}
placementStrategyExists = false
// Not Found! Create
placementStrategy = &clusterv1alpha1.Placement{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
helpers.PlacementStrategyLabel: placement.Name,
},
Namespace: strategy.Namespace,
Name: placementStrategyName,
},
Spec: placement.Spec,
}
}
// Set owner reference for cleanup
err := controllerutil.SetOwnerReference(strategy, placementStrategy, r.Scheme)
if err != nil {
return nil, placementStrategyExists, err
}
return placementStrategy, placementStrategyExists, nil
}
func (r *StrategyReconciler) processStrategyDeletion(strategy *identitatemv1alpha1.Strategy) (ctrl.Result, error) {
//Delete strategyPlacement
r.Log.Info("process strategy deletion:", "name", strategy.Name, "namespace", strategy.Namespace)
authRealm, err := helpers.GetAuthrealmFromStrategy(r.Client, strategy)
if err != nil {
return ctrl.Result{}, giterrors.WithStack(err)
}
pl := &clusterv1alpha1.Placement{}
err = r.Client.Get(context.TODO(),
client.ObjectKey{Name: helpers.PlacementStrategyName(strategy, authRealm), Namespace: strategy.Namespace},
pl)
switch {
case err == nil:
if isLastOwnerReference(pl, strategy) {
if err := r.Client.Delete(context.TODO(), pl); err != nil {
return ctrl.Result{}, giterrors.WithStack(err)
}
r.Log.Info("waiting strategy placement to be deleted",
"name", helpers.PlacementStrategyName(strategy, authRealm),
"namespace", strategy.Namespace)
return ctrl.Result{Requeue: true, RequeueAfter: 1 * time.Second}, nil
}
removeOwnerReference(pl, strategy)
if err := r.Client.Update(context.TODO(), pl); err != nil {
return ctrl.Result{}, giterrors.WithStack(err)
}
case errors.IsNotFound(err):
r.Log.Info("nothing to do as placement is already deleted",
"name", helpers.PlacementStrategyName(strategy, authRealm),
"namespace", strategy.Namespace)
return ctrl.Result{}, nil
}
return ctrl.Result{}, err
}
func isLastOwnerReference(pl *clusterv1alpha1.Placement, strategy *identitatemv1alpha1.Strategy) bool {
refs := pl.GetOwnerReferences()
return len(refs) <= 1 && refs[0].UID == strategy.UID
}
func removeOwnerReference(pl *clusterv1alpha1.Placement, strategy *identitatemv1alpha1.Strategy) []metav1.OwnerReference {
refs := pl.GetOwnerReferences()
index := -1
for i, ref := range refs {
if ref.UID == strategy.UID {
index = i
}
}
if index != -1 {
refs[index] = refs[len(refs)-1]
return refs[:len(refs)-1]
}
return refs
}
// SetupWithManager sets up the controller with the Manager.
func (r *StrategyReconciler) SetupWithManager(mgr ctrl.Manager) error {
//Install CRD
applierBuilder := &clusteradmapply.ApplierBuilder{}
applier := applierBuilder.WithClient(r.KubeClient, r.APIExtensionClient, r.DynamicClient).Build()
readerIDPMgmtOperator := idpconfig.GetScenarioResourcesReader()
file := "crd/bases/identityconfig.identitatem.io_strategies.yaml"
if _, err := applier.ApplyDirectly(readerIDPMgmtOperator, nil, false, "", file); err != nil {
return err
}
// b := retry.DefaultBackoff
// b.Duration = 10 * time.Second
// if err := clusteradmhelpers.WaitCRDToBeReady(r.APIExtensionClient, "strategies.identityconfig.identiatem.io", b); err != nil {
// return err
// }
if err := identitatemv1alpha1.AddToScheme(mgr.GetScheme()); err != nil {
return err
}
if err := clusterv1alpha1.AddToScheme(mgr.GetScheme()); err != nil {
return err
}
if err := clusterv1.AddToScheme(mgr.GetScheme()); err != nil {
return err
}
if err := workv1.AddToScheme(mgr.GetScheme()); err != nil {
return err
}
if err := identitatemdexv1alpha1.AddToScheme(mgr.GetScheme()); err != nil {
return err
}
if err := ocinfrav1.AddToScheme(mgr.GetScheme()); err != nil {
return err
}
return ctrl.NewControllerManagedBy(mgr).
For(&identitatemv1alpha1.Strategy{}).
Owns(&clusterv1alpha1.Placement{}).
//Watch placement and reconcile the strategy link to the placement
Watches(&source.Kind{Type: &clusterv1alpha1.Placement{}}, handler.EnqueueRequestsFromMapFunc(func(o client.Object) []reconcile.Request {
pl := o.(*clusterv1alpha1.Placement)
req := make([]reconcile.Request, 0)
strategies := &identitatemv1alpha1.StrategyList{}
if err := r.List(context.TODO(), strategies, client.InNamespace(pl.Namespace)); err != nil {
r.Log.Error(err, "Error while getting list")
}
for _, strategy := range strategies.Items {
r.Log.Info("Check if need to be reconcile",
"placementRefName", strategy.Spec.PlacementRef.Name,
"helpers.PlacementStrategyNameFromPlacementRefName(string(strategy.Spec.Type), pl.Name)", helpers.PlacementStrategyNameFromPlacementRefName(string(strategy.Spec.Type), pl.Name))
if strategy.Spec.PlacementRef.Name == helpers.PlacementStrategyNameFromPlacementRefName(string(strategy.Spec.Type), pl.Name) {
r.Log.Info("Add strategy to reconcile",
"name", strategy.Name,
"namespace", strategy.Namespace)
req = append(req, reconcile.Request{
NamespacedName: types.NamespacedName{
Name: strategy.Name,
Namespace: strategy.Namespace,
},
})
}
}
return req
})).
Complete(r)
}