mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-10-01 01:36:09 -04:00
97 lines
3.8 KiB
Go
97 lines
3.8 KiB
Go
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package controllers
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import (
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"context"
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appsv1 "k8s.io/api/apps/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/client-go/util/retry"
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ctrl "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/log"
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updatev1alpha1 "github.com/edgelesssys/constellation/operators/constellation-node-operator/api/v1alpha1"
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)
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// AutoscalingStrategyReconciler reconciles a AutoscalingStrategy object
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type AutoscalingStrategyReconciler struct {
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client.Client
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Scheme *runtime.Scheme
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}
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//+kubebuilder:rbac:groups=update.edgeless.systems,resources=autoscalingstrategies,verbs=get;list;watch;create;update;patch;delete
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//+kubebuilder:rbac:groups=update.edgeless.systems,resources=autoscalingstrategies/status,verbs=get;update;patch
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//+kubebuilder:rbac:groups=update.edgeless.systems,resources=autoscalingstrategies/finalizers,verbs=update
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//+kubebuilder:rbac:groups=apps,resources=deployments,verbs=get;list;watch;create;update;delete
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// Reconcile enabled or disables the cluster-autoscaler based on the AutoscalingStrategy spec
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// by modifying the replicas of the Deployment.
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func (r *AutoscalingStrategyReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
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logr := log.FromContext(ctx)
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var desiredAutoscalingStrategy updatev1alpha1.AutoscalingStrategy
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if err := r.Get(ctx, req.NamespacedName, &desiredAutoscalingStrategy); err != nil {
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logr.Error(err, "Unable to fetch AutoscalingStrategy")
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return ctrl.Result{}, client.IgnoreNotFound(err)
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}
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var expectedReplicas int32
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if desiredAutoscalingStrategy.Spec.Enabled {
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expectedReplicas = 1
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}
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var autoscalerDeployment appsv1.Deployment
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if err := r.Get(ctx, client.ObjectKey{Namespace: desiredAutoscalingStrategy.Spec.DeploymentNamespace, Name: desiredAutoscalingStrategy.Spec.DeploymentName}, &autoscalerDeployment); err != nil {
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logr.Error(err, "Unable to fetch autoscaler Deployment")
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return ctrl.Result{}, client.IgnoreNotFound(err)
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}
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if autoscalerDeployment.Spec.Replicas == nil || *autoscalerDeployment.Spec.Replicas == 0 {
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desiredAutoscalingStrategy.Status.Enabled = false
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desiredAutoscalingStrategy.Status.Replicas = 0
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} else {
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desiredAutoscalingStrategy.Status.Enabled = true
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desiredAutoscalingStrategy.Status.Replicas = *autoscalerDeployment.Spec.Replicas
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}
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if err := r.tryUpdateStatus(ctx, req.NamespacedName, desiredAutoscalingStrategy.Status); err != nil {
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logr.Error(err, "Unable to update AutoscalingStrategy status")
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return ctrl.Result{}, err
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}
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if autoscalerDeployment.Spec.Replicas == nil || *autoscalerDeployment.Spec.Replicas != expectedReplicas {
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logr.Info("Updating autoscaling replicas", "expectedReplicas", expectedReplicas)
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autoscalerDeployment.Spec.Replicas = &expectedReplicas
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if err := r.Update(ctx, &autoscalerDeployment); err != nil {
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logr.Error(err, "Unable to update autoscaler Deployment")
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return ctrl.Result{}, err
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}
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return ctrl.Result{Requeue: true}, nil
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}
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return ctrl.Result{}, nil
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}
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// SetupWithManager sets up the controller with the Manager.
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func (r *AutoscalingStrategyReconciler) SetupWithManager(mgr ctrl.Manager) error {
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return ctrl.NewControllerManagedBy(mgr).
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For(&updatev1alpha1.AutoscalingStrategy{}).
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Complete(r)
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}
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// tryUpdateStatus attempts to update the AutoscalingStrategy status field in a retry loop.
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func (r *AutoscalingStrategyReconciler) tryUpdateStatus(ctx context.Context, name types.NamespacedName, status updatev1alpha1.AutoscalingStrategyStatus) error {
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return retry.RetryOnConflict(retry.DefaultRetry, func() error {
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var autoscalingStrategy updatev1alpha1.AutoscalingStrategy
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if err := r.Get(ctx, name, &autoscalingStrategy); err != nil {
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return err
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}
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autoscalingStrategy.Status = *status.DeepCopy()
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if err := r.Status().Update(ctx, &autoscalingStrategy); err != nil {
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return err
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}
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return nil
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})
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}
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