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feat: add propagation policy controller
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,194 @@ | ||
| /* | ||
| Copyright 2023 The KubeAdmiral 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 propagationpolicy | ||
|
|
||
| import ( | ||
| "context" | ||
| "time" | ||
|
|
||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/tools/cache" | ||
| "k8s.io/klog/v2" | ||
|
|
||
| corev1alpha1 "github.com/kubewharf/kubeadmiral/pkg/apis/core/v1alpha1" | ||
| fedclient "github.com/kubewharf/kubeadmiral/pkg/client/clientset/versioned" | ||
| fedcorev1a1informers "github.com/kubewharf/kubeadmiral/pkg/client/informers/externalversions/core/v1alpha1" | ||
| "github.com/kubewharf/kubeadmiral/pkg/controllers/common" | ||
| "github.com/kubewharf/kubeadmiral/pkg/stats" | ||
| "github.com/kubewharf/kubeadmiral/pkg/util/eventhandlers" | ||
| "github.com/kubewharf/kubeadmiral/pkg/util/logging" | ||
| "github.com/kubewharf/kubeadmiral/pkg/util/worker" | ||
| ) | ||
|
|
||
| const ( | ||
| PropagationPolicyControllerName = "propagation-policy-controller" | ||
| ) | ||
|
|
||
| type Controller struct { | ||
| propagationPolicyInformer fedcorev1a1informers.PropagationPolicyInformer | ||
| clusterPropagationPolicyInformer fedcorev1a1informers.ClusterPropagationPolicyInformer | ||
|
|
||
| // updates the local counter upon fed object updates | ||
| worker worker.ReconcileWorker[common.QualifiedName] | ||
|
|
||
| fedClient fedclient.Interface | ||
| metrics stats.Metrics | ||
| logger klog.Logger | ||
| } | ||
|
|
||
| func NewPropagationPolicyController( | ||
| fedClient fedclient.Interface, | ||
| propagationPolicyInformer fedcorev1a1informers.PropagationPolicyInformer, | ||
| clusterPropagationPolicyInformer fedcorev1a1informers.ClusterPropagationPolicyInformer, | ||
| metrics stats.Metrics, | ||
| logger klog.Logger, | ||
| workerCount int, | ||
| ) (*Controller, error) { | ||
| c := &Controller{ | ||
| propagationPolicyInformer: propagationPolicyInformer, | ||
| clusterPropagationPolicyInformer: clusterPropagationPolicyInformer, | ||
| fedClient: fedClient, | ||
| metrics: metrics, | ||
| logger: logger.WithValues("controller", PropagationPolicyControllerName), | ||
| } | ||
|
|
||
| c.worker = worker.NewReconcileWorker[common.QualifiedName]( | ||
| PropagationPolicyControllerName, | ||
| c.reconcile, | ||
| worker.RateLimiterOptions{}, | ||
| workerCount, | ||
| metrics, | ||
| ) | ||
|
|
||
| if _, err := c.propagationPolicyInformer.Informer().AddEventHandler( | ||
| eventhandlers.NewTriggerOnAllChangesWithTransform(common.NewQualifiedName, c.worker.Enqueue), | ||
| ); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if _, err := c.clusterPropagationPolicyInformer.Informer().AddEventHandler( | ||
| eventhandlers.NewTriggerOnAllChangesWithTransform(common.NewQualifiedName, c.worker.Enqueue), | ||
| ); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return c, nil | ||
| } | ||
|
|
||
| func (c *Controller) Run(ctx context.Context) { | ||
| ctx, logger := logging.InjectLogger(ctx, c.logger) | ||
|
|
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| logger.Info("Starting controller") | ||
| defer c.logger.Info("Stopping controller") | ||
|
|
||
| if !cache.WaitForNamedCacheSync(PropagationPolicyControllerName, ctx.Done(), c.HasSynced) { | ||
| logger.Error(nil, "Timed out waiting for caches to sync") | ||
| return | ||
| } | ||
| logger.Info("Caches are synced") | ||
| c.worker.Run(ctx) | ||
| <-ctx.Done() | ||
| } | ||
|
|
||
| func (c *Controller) HasSynced() bool { | ||
| return c.propagationPolicyInformer.Informer().HasSynced() && | ||
| c.clusterPropagationPolicyInformer.Informer().HasSynced() | ||
| } | ||
|
|
||
| func (c *Controller) IsControllerReady() bool { | ||
| return c.HasSynced() | ||
| } | ||
|
|
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| func (c *Controller) reconcile(ctx context.Context, key common.QualifiedName) (status worker.Result) { | ||
| ctx, logger := logging.InjectLoggerValues(ctx, "object", key.String()) | ||
|
|
||
| c.metrics.Rate("api-migration-controller.throughput", 1) | ||
| logger.V(3).Info("Starting to reconcile") | ||
| startTime := time.Now() | ||
| defer func() { | ||
| c.metrics.Duration("api-migration-controller.latency", startTime) | ||
| logger.V(3).WithValues("duration", time.Since(startTime), "status", status.String()). | ||
| Info("Finished reconciling") | ||
| }() | ||
|
|
||
| var policy corev1alpha1.GenericPropagationPolicy | ||
| var err error | ||
| if key.Namespace == "" { | ||
| policy, err = c.fedClient.CoreV1alpha1().ClusterPropagationPolicies().Get(ctx, key.Name, metav1.GetOptions{}) | ||
| } else { | ||
| policy, err = c.fedClient.CoreV1alpha1().PropagationPolicies(key.Namespace).Get(ctx, key.Name, metav1.GetOptions{}) | ||
| } | ||
| if err != nil { | ||
| logger.Error(err, "Failed to get policy") | ||
| return worker.StatusError | ||
| } | ||
|
|
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| policySpec := policy.GetSpec() | ||
| policyChanged := false | ||
|
|
||
| if policySpec.ReschedulePolicy == nil { | ||
| policySpec.ReschedulePolicy = &corev1alpha1.ReschedulePolicy{ | ||
| ReplicaRescheduling: policySpec.ReplicaRescheduling, | ||
| Trigger: &corev1alpha1.RescheduleTrigger{ | ||
| PolicyContentChanged: true, | ||
| }, | ||
| } | ||
| if policySpec.StickyCluster { | ||
| policySpec.ReschedulePolicy = &corev1alpha1.ReschedulePolicy{ | ||
| DisableRescheduling: true, | ||
| } | ||
| } | ||
| policyChanged = true | ||
| } else { | ||
| if policySpec.ReschedulePolicy.DisableRescheduling { | ||
| if !policySpec.StickyCluster { | ||
| policySpec.StickyCluster = true | ||
| policyChanged = true | ||
| } | ||
| } else { | ||
| if policySpec.ReschedulePolicy.ReplicaRescheduling == nil { | ||
| if policySpec.ReplicaRescheduling != nil { | ||
| policySpec.ReschedulePolicy.ReplicaRescheduling = policySpec.ReplicaRescheduling | ||
| policyChanged = true | ||
| } | ||
| } else { | ||
| if policySpec.ReplicaRescheduling == nil || | ||
| policySpec.ReplicaRescheduling.AvoidDisruption != policySpec.ReschedulePolicy.ReplicaRescheduling.AvoidDisruption { | ||
| policySpec.ReplicaRescheduling = policySpec.ReschedulePolicy.ReplicaRescheduling | ||
| policyChanged = true | ||
| } | ||
| } | ||
| } | ||
| } | ||
| if !policyChanged { | ||
| return worker.StatusAllOK | ||
| } | ||
|
|
||
| if key.Namespace == "" { | ||
| p := policy.(*corev1alpha1.ClusterPropagationPolicy) | ||
| _, err = c.fedClient.CoreV1alpha1().ClusterPropagationPolicies().Update(ctx, p, metav1.UpdateOptions{}) | ||
| } else { | ||
| p := policy.(*corev1alpha1.PropagationPolicy) | ||
| _, err = c.fedClient.CoreV1alpha1().PropagationPolicies(key.Namespace).Update(ctx, p, metav1.UpdateOptions{}) | ||
| } | ||
| if err != nil { | ||
| logger.Error(err, "Failed to update policy") | ||
| return worker.StatusError | ||
| } | ||
|
|
||
| return worker.StatusAllOK | ||
| } | ||
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