201 lines
8.1 KiB
Go
201 lines
8.1 KiB
Go
/*
|
|
Copyright 2024 The Karmada Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package workloadrebalancer
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
apierrors "k8s.io/apimachinery/pkg/api/errors"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/client-go/util/retry"
|
|
"k8s.io/klog/v2"
|
|
controllerruntime "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/event"
|
|
"sigs.k8s.io/controller-runtime/pkg/predicate"
|
|
|
|
appsv1alpha1 "github.com/karmada-io/karmada/pkg/apis/apps/v1alpha1"
|
|
workv1alpha2 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha2"
|
|
"github.com/karmada-io/karmada/pkg/util/names"
|
|
)
|
|
|
|
const (
|
|
// ControllerName is the controller name that will be used when reporting events.
|
|
ControllerName = "workload-rebalancer"
|
|
)
|
|
|
|
// RebalancerController is to handle a rebalance to workloads selected by WorkloadRebalancer object.
|
|
type RebalancerController struct {
|
|
Client client.Client
|
|
}
|
|
|
|
// SetupWithManager creates a controller and register to controller manager.
|
|
func (c *RebalancerController) SetupWithManager(mgr controllerruntime.Manager) error {
|
|
var predicateFunc = predicate.Funcs{
|
|
CreateFunc: func(e event.CreateEvent) bool { return true },
|
|
UpdateFunc: func(e event.UpdateEvent) bool { return false },
|
|
DeleteFunc: func(event.DeleteEvent) bool { return false },
|
|
GenericFunc: func(event.GenericEvent) bool { return false },
|
|
}
|
|
|
|
return controllerruntime.NewControllerManagedBy(mgr).
|
|
Named(ControllerName).
|
|
For(&appsv1alpha1.WorkloadRebalancer{}, builder.WithPredicates(predicateFunc)).
|
|
Complete(c)
|
|
}
|
|
|
|
// Reconcile performs a full reconciliation for the object referred to by the Request.
|
|
// The Controller will requeue the Request to be processed again if an error is non-nil or
|
|
// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
|
|
func (c *RebalancerController) Reconcile(ctx context.Context, req controllerruntime.Request) (controllerruntime.Result, error) {
|
|
klog.V(4).Infof("Reconciling for WorkloadRebalancer %s", req.Name)
|
|
|
|
// 1. get latest WorkloadRebalancer
|
|
rebalancer := &appsv1alpha1.WorkloadRebalancer{}
|
|
if err := c.Client.Get(ctx, req.NamespacedName, rebalancer); err != nil {
|
|
if apierrors.IsNotFound(err) {
|
|
klog.Infof("no need to reconcile WorkloadRebalancer for it not found")
|
|
return controllerruntime.Result{}, nil
|
|
}
|
|
return controllerruntime.Result{}, err
|
|
}
|
|
|
|
// 2. get and update referenced binding to trigger a rescheduling
|
|
newStatus, successNum, retryNum := c.doWorkloadRebalance(ctx, rebalancer)
|
|
|
|
// 3. update status of WorkloadRebalancer
|
|
if err := c.updateWorkloadRebalancerStatus(rebalancer, newStatus); err != nil {
|
|
return controllerruntime.Result{}, err
|
|
}
|
|
klog.Infof("Finish handling WorkloadRebalancer (%s), %d/%d resource success in all, while %d resource need retry",
|
|
rebalancer.Name, successNum, len(newStatus.ObservedWorkloads), retryNum)
|
|
|
|
if retryNum > 0 {
|
|
return controllerruntime.Result{}, fmt.Errorf("%d resource reschedule triggered failed and need retry", retryNum)
|
|
}
|
|
return controllerruntime.Result{}, nil
|
|
}
|
|
|
|
func (c *RebalancerController) buildWorkloadRebalancerStatus(rebalancer *appsv1alpha1.WorkloadRebalancer) appsv1alpha1.WorkloadRebalancerStatus {
|
|
resourceList := make([]appsv1alpha1.ObservedWorkload, 0)
|
|
for _, resource := range rebalancer.Spec.Workloads {
|
|
resourceList = append(resourceList, appsv1alpha1.ObservedWorkload{
|
|
Workload: resource,
|
|
})
|
|
}
|
|
return appsv1alpha1.WorkloadRebalancerStatus{
|
|
ObservedWorkloads: resourceList,
|
|
}
|
|
}
|
|
|
|
func (c *RebalancerController) doWorkloadRebalance(ctx context.Context, rebalancer *appsv1alpha1.WorkloadRebalancer) (
|
|
newStatus appsv1alpha1.WorkloadRebalancerStatus, successNum int64, retryNum int64) {
|
|
// get previous status and update basing on it
|
|
newStatus = rebalancer.Status
|
|
if len(newStatus.ObservedWorkloads) == 0 {
|
|
newStatus = c.buildWorkloadRebalancerStatus(rebalancer)
|
|
}
|
|
|
|
successNum, retryNum = int64(0), int64(0)
|
|
for i, resource := range newStatus.ObservedWorkloads {
|
|
if resource.Result == appsv1alpha1.RebalanceSuccessful {
|
|
successNum++
|
|
continue
|
|
}
|
|
if resource.Result == appsv1alpha1.RebalanceFailed && resource.Reason == appsv1alpha1.RebalanceObjectNotFound {
|
|
continue
|
|
}
|
|
|
|
bindingName := names.GenerateBindingName(resource.Workload.Kind, resource.Workload.Name)
|
|
// resource with empty namespace represents it is a cluster wide resource.
|
|
if resource.Workload.Namespace != "" {
|
|
binding := &workv1alpha2.ResourceBinding{}
|
|
if err := c.Client.Get(ctx, client.ObjectKey{Namespace: resource.Workload.Namespace, Name: bindingName}, binding); err != nil {
|
|
klog.Errorf("get binding failed: %+v", err)
|
|
c.recordWorkloadRebalanceFailed(&newStatus.ObservedWorkloads[i], &retryNum, err)
|
|
continue
|
|
}
|
|
// update spec.rescheduleTriggeredAt of referenced fetchTargetRefBindings to trigger a rescheduling
|
|
if c.needTriggerReschedule(rebalancer.CreationTimestamp, binding.Spec.RescheduleTriggeredAt) {
|
|
binding.Spec.RescheduleTriggeredAt = &rebalancer.CreationTimestamp
|
|
|
|
if err := c.Client.Update(ctx, binding); err != nil {
|
|
klog.Errorf("update binding failed: %+v", err)
|
|
c.recordWorkloadRebalanceFailed(&newStatus.ObservedWorkloads[i], &retryNum, err)
|
|
continue
|
|
}
|
|
}
|
|
c.recordWorkloadRebalanceSuccess(&newStatus.ObservedWorkloads[i], &successNum)
|
|
} else {
|
|
clusterbinding := &workv1alpha2.ClusterResourceBinding{}
|
|
if err := c.Client.Get(ctx, client.ObjectKey{Name: bindingName}, clusterbinding); err != nil {
|
|
klog.Errorf("get cluster binding failed: %+v", err)
|
|
c.recordWorkloadRebalanceFailed(&newStatus.ObservedWorkloads[i], &retryNum, err)
|
|
continue
|
|
}
|
|
// update spec.rescheduleTriggeredAt of referenced clusterbinding to trigger a rescheduling
|
|
if c.needTriggerReschedule(rebalancer.CreationTimestamp, clusterbinding.Spec.RescheduleTriggeredAt) {
|
|
clusterbinding.Spec.RescheduleTriggeredAt = &rebalancer.CreationTimestamp
|
|
|
|
if err := c.Client.Update(ctx, clusterbinding); err != nil {
|
|
klog.Errorf("update cluster binding failed: %+v", err)
|
|
c.recordWorkloadRebalanceFailed(&newStatus.ObservedWorkloads[i], &retryNum, err)
|
|
continue
|
|
}
|
|
}
|
|
c.recordWorkloadRebalanceSuccess(&newStatus.ObservedWorkloads[i], &successNum)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (c *RebalancerController) needTriggerReschedule(creationTimestamp metav1.Time, rescheduleTriggeredAt *metav1.Time) bool {
|
|
return rescheduleTriggeredAt == nil || creationTimestamp.After(rescheduleTriggeredAt.Time)
|
|
}
|
|
|
|
func (c *RebalancerController) recordWorkloadRebalanceSuccess(resource *appsv1alpha1.ObservedWorkload, successNum *int64) {
|
|
resource.Result = appsv1alpha1.RebalanceSuccessful
|
|
*successNum++
|
|
}
|
|
|
|
func (c *RebalancerController) recordWorkloadRebalanceFailed(resource *appsv1alpha1.ObservedWorkload, retryNum *int64, err error) {
|
|
resource.Result = appsv1alpha1.RebalanceFailed
|
|
reason := apierrors.ReasonForError(err)
|
|
if reason == metav1.StatusReasonNotFound {
|
|
resource.Reason = appsv1alpha1.RebalanceObjectNotFound
|
|
} else {
|
|
*retryNum++
|
|
}
|
|
}
|
|
|
|
func (c *RebalancerController) updateWorkloadRebalancerStatus(rebalancer *appsv1alpha1.WorkloadRebalancer, newStatus appsv1alpha1.WorkloadRebalancerStatus) error {
|
|
rebalancerPatch := client.MergeFrom(rebalancer)
|
|
rebalancerCopy := rebalancer.DeepCopy()
|
|
rebalancerCopy.Status = newStatus
|
|
|
|
return retry.RetryOnConflict(retry.DefaultRetry, func() (err error) {
|
|
klog.V(4).Infof("Start to patch WorkloadRebalancer(%s) status", rebalancer.Name)
|
|
if err := c.Client.Status().Patch(context.TODO(), rebalancerCopy, rebalancerPatch); err != nil {
|
|
klog.Errorf("Failed to patch WorkloadRebalancer (%s) status, err: %+v", rebalancer.Name, err)
|
|
return err
|
|
}
|
|
return nil
|
|
})
|
|
}
|