252 lines
9.1 KiB
Go
252 lines
9.1 KiB
Go
package execution
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import (
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"context"
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"fmt"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/api/meta"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/util/errors"
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"k8s.io/client-go/tools/record"
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"k8s.io/klog/v2"
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controllerruntime "sigs.k8s.io/controller-runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
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"sigs.k8s.io/controller-runtime/pkg/predicate"
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clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
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workv1alpha1 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha1"
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"github.com/karmada-io/karmada/pkg/util"
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"github.com/karmada-io/karmada/pkg/util/helper"
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"github.com/karmada-io/karmada/pkg/util/informermanager"
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"github.com/karmada-io/karmada/pkg/util/informermanager/keys"
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"github.com/karmada-io/karmada/pkg/util/names"
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"github.com/karmada-io/karmada/pkg/util/objectwatcher"
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)
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const (
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// ControllerName is the controller name that will be used when reporting events.
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ControllerName = "execution-controller"
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)
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// Controller is to sync Work.
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type Controller struct {
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client.Client // used to operate Work resources.
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EventRecorder record.EventRecorder
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RESTMapper meta.RESTMapper
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ObjectWatcher objectwatcher.ObjectWatcher
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PredicateFunc predicate.Predicate
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InformerManager informermanager.MultiClusterInformerManager
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}
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// Reconcile performs a full reconciliation for the object referred to by the Request.
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// The Controller will requeue the Request to be processed again if an error is non-nil or
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// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
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func (c *Controller) Reconcile(ctx context.Context, req controllerruntime.Request) (controllerruntime.Result, error) {
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klog.V(4).Infof("Reconciling Work %s", req.NamespacedName.String())
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work := &workv1alpha1.Work{}
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if err := c.Client.Get(context.TODO(), req.NamespacedName, work); err != nil {
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// The resource may no longer exist, in which case we stop processing.
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if apierrors.IsNotFound(err) {
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return controllerruntime.Result{}, nil
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}
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return controllerruntime.Result{Requeue: true}, err
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}
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clusterName, err := names.GetClusterName(work.Namespace)
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if err != nil {
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klog.Errorf("Failed to get member cluster name for work %s/%s", work.Namespace, work.Name)
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return controllerruntime.Result{Requeue: true}, err
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}
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cluster, err := util.GetCluster(c.Client, clusterName)
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if err != nil {
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klog.Errorf("Failed to get the given member cluster %s", clusterName)
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return controllerruntime.Result{Requeue: true}, err
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}
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if !work.DeletionTimestamp.IsZero() {
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applied := helper.IsResourceApplied(&work.Status)
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if applied {
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err := c.tryDeleteWorkload(cluster, work)
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if err != nil {
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klog.Errorf("Failed to delete work %v, namespace is %v, err is %v", work.Name, work.Namespace, err)
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return controllerruntime.Result{Requeue: true}, err
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}
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}
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return c.removeFinalizer(work)
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}
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return c.syncWork(cluster, work)
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}
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// SetupWithManager creates a controller and register to controller manager.
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func (c *Controller) SetupWithManager(mgr controllerruntime.Manager) error {
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return controllerruntime.NewControllerManagedBy(mgr).
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For(&workv1alpha1.Work{}).
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WithEventFilter(predicate.GenerationChangedPredicate{}).
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WithEventFilter(c.PredicateFunc).
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Complete(c)
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}
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func (c *Controller) syncWork(cluster *clusterv1alpha1.Cluster, work *workv1alpha1.Work) (controllerruntime.Result, error) {
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if !util.IsClusterReady(&cluster.Status) {
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klog.Errorf("Stop sync work(%s/%s) for cluster(%s) as cluster not ready.", work.Namespace, work.Name, cluster.Name)
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return controllerruntime.Result{Requeue: true}, fmt.Errorf("cluster(%s) not ready", cluster.Name)
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}
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err := c.syncToClusters(cluster, work)
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if err != nil {
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klog.Errorf("Failed to sync work(%s) to cluster(%s): %v", work.Name, cluster.Name, err)
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return controllerruntime.Result{Requeue: true}, err
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}
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return controllerruntime.Result{}, nil
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}
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// tryDeleteWorkload tries to delete resource in the given member cluster.
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// Abort deleting when the member cluster is unready, otherwise we can't unjoin the member cluster when the member cluster is unready
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func (c *Controller) tryDeleteWorkload(cluster *clusterv1alpha1.Cluster, work *workv1alpha1.Work) error {
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// Do not clean up resource in the given member cluster if the status of the given member cluster is unready
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if !util.IsClusterReady(&cluster.Status) {
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klog.Infof("Do not clean up resource in the given member cluster if the status of the given member cluster %s is unready", cluster.Name)
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return nil
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}
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for _, manifest := range work.Spec.Workload.Manifests {
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workload := &unstructured.Unstructured{}
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err := workload.UnmarshalJSON(manifest.Raw)
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if err != nil {
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klog.Errorf("failed to unmarshal workload, error is: %v", err)
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return err
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}
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err = c.ObjectWatcher.Delete(cluster, workload)
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if err != nil {
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klog.Errorf("Failed to delete resource in the given member cluster %v, err is %v", cluster.Name, err)
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return err
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}
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}
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return nil
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}
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// removeFinalizer remove finalizer from the given Work
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func (c *Controller) removeFinalizer(work *workv1alpha1.Work) (controllerruntime.Result, error) {
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if !controllerutil.ContainsFinalizer(work, util.ExecutionControllerFinalizer) {
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return controllerruntime.Result{}, nil
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}
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controllerutil.RemoveFinalizer(work, util.ExecutionControllerFinalizer)
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err := c.Client.Update(context.TODO(), work)
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if err != nil {
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return controllerruntime.Result{Requeue: true}, err
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}
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return controllerruntime.Result{}, nil
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}
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// syncToClusters ensures that the state of the given object is synchronized to member clusters.
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func (c *Controller) syncToClusters(cluster *clusterv1alpha1.Cluster, work *workv1alpha1.Work) error {
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var errs []error
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syncSucceedNum := 0
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for _, manifest := range work.Spec.Workload.Manifests {
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workload := &unstructured.Unstructured{}
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err := workload.UnmarshalJSON(manifest.Raw)
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if err != nil {
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klog.Errorf("failed to unmarshal workload, error is: %v", err)
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errs = append(errs, err)
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continue
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}
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applied := helper.IsResourceApplied(&work.Status)
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if applied {
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err = c.tryUpdateWorkload(cluster, workload)
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if err != nil {
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klog.Errorf("Failed to update resource(%v/%v) in the given member cluster %s, err is %v", workload.GetNamespace(), workload.GetName(), cluster.Name, err)
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errs = append(errs, err)
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continue
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}
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} else {
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err = c.tryCreateWorkload(cluster, workload)
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if err != nil {
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klog.Errorf("Failed to create resource(%v/%v) in the given member cluster %s, err is %v", workload.GetNamespace(), workload.GetName(), cluster.Name, err)
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errs = append(errs, err)
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continue
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}
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}
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syncSucceedNum++
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}
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if len(errs) > 0 {
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total := len(work.Spec.Workload.Manifests)
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message := fmt.Sprintf("Failed to apply all manifests (%v/%v): %v", syncSucceedNum, total, errors.NewAggregate(errs).Error())
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err := c.updateAppliedCondition(work, metav1.ConditionFalse, "AppliedFailed", message)
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if err != nil {
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klog.Errorf("Failed to update applied status for given work %v, namespace is %v, err is %v", work.Name, work.Namespace, err)
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errs = append(errs, err)
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}
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return errors.NewAggregate(errs)
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}
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err := c.updateAppliedCondition(work, metav1.ConditionTrue, "AppliedSuccessful", "Manifest has been successfully applied")
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if err != nil {
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klog.Errorf("Failed to update applied status for given work %v, namespace is %v, err is %v", work.Name, work.Namespace, err)
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return err
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}
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return nil
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}
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func (c *Controller) tryUpdateWorkload(cluster *clusterv1alpha1.Cluster, workload *unstructured.Unstructured) error {
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fedKey, err := keys.FederatedKeyFunc(cluster.Name, workload)
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if err != nil {
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klog.Errorf("Failed to get FederatedKey %s, error: %v", workload.GetName(), err)
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return err
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}
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clusterObj, err := helper.GetObjectFromCache(c.RESTMapper, c.InformerManager, fedKey)
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if err != nil {
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if !apierrors.IsNotFound(err) {
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klog.Errorf("Failed to get resource %v from member cluster, err is %v ", workload.GetName(), err)
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return err
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}
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return c.tryCreateWorkload(cluster, workload)
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}
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err = c.ObjectWatcher.Update(cluster, workload, clusterObj)
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if err != nil {
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klog.Errorf("Failed to update resource in the given member cluster %s, err is %v", cluster.Name, err)
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return err
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}
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return nil
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}
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func (c *Controller) tryCreateWorkload(cluster *clusterv1alpha1.Cluster, workload *unstructured.Unstructured) error {
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err := c.ObjectWatcher.Create(cluster, workload)
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if err != nil {
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klog.Errorf("Failed to create resource in the given member cluster %s, err is %v", cluster.Name, err)
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return err
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}
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return nil
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}
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// updateAppliedCondition update the Applied condition for the given Work
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func (c *Controller) updateAppliedCondition(work *workv1alpha1.Work, status metav1.ConditionStatus, reason, message string) error {
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newWorkAppliedCondition := metav1.Condition{
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Type: workv1alpha1.WorkApplied,
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Status: status,
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Reason: reason,
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Message: message,
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LastTransitionTime: metav1.Now(),
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}
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meta.SetStatusCondition(&work.Status.Conditions, newWorkAppliedCondition)
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err := c.Client.Status().Update(context.TODO(), work)
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return err
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}
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