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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| /* | ||
| Copyright 2024. | ||
| 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 controller | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/pkg/errors" | ||
| apierrors "k8s.io/apimachinery/pkg/api/errors" | ||
| clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1" | ||
| 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/log" | ||
| "sigs.k8s.io/controller-runtime/pkg/reconcile" | ||
|
|
||
| "github.com/giantswarm/observability-operator/pkg/common" | ||
| "github.com/giantswarm/observability-operator/pkg/monitoring" | ||
| "github.com/giantswarm/observability-operator/pkg/monitoring/heartbeat" | ||
| ) | ||
|
|
||
| // ClusterMonitoringReconciler reconciles a Cluster object | ||
| type ClusterMonitoringReconciler struct { | ||
| // Client is the controller client. | ||
| client.Client | ||
| common.ManagementCluster | ||
| // HeartbeatRepository is the repository for managing heartbeats. | ||
| heartbeat.HeartbeatRepository | ||
| // MonitoringEnabled defines whether monitoring is enabled at the installation level. | ||
| MonitoringEnabled bool | ||
| } | ||
|
|
||
| // SetupWithManager sets up the controller with the Manager. | ||
| func (r *ClusterMonitoringReconciler) SetupWithManager(mgr ctrl.Manager) error { | ||
| return ctrl.NewControllerManagedBy(mgr). | ||
| For(&clusterv1.Cluster{}). | ||
| Complete(r) | ||
| } | ||
|
|
||
| //+kubebuilder:rbac:groups=objectstorage.giantswarm.io,resources=Clusters,verbs=get;list;watch;create;update;patch;delete | ||
| //+kubebuilder:rbac:groups=objectstorage.giantswarm.io,resources=Clusters/status,verbs=get;update;patch | ||
| //+kubebuilder:rbac:groups=objectstorage.giantswarm.io,resources=Clusters/finalizers,verbs=update | ||
|
|
||
| // Reconcile is part of the main kubernetes reconciliation loop which aims to | ||
| // move the current state of the cluster closer to the desired state. | ||
| // | ||
| // For more details, check Reconcile and its Result here: | ||
| // - https://pkg.go.dev/sigs.k8s.io/[email protected]/pkg/reconcile | ||
| func (r *ClusterMonitoringReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { | ||
| logger := log.FromContext(ctx) | ||
|
|
||
| // Fetch the Cluster instance. | ||
| cluster := &clusterv1.Cluster{} | ||
| if err := r.Client.Get(ctx, req.NamespacedName, cluster); err != nil { | ||
| if apierrors.IsNotFound(err) { | ||
| // Object not found, return. Created objects are automatically garbage collected. | ||
| // For additional cleanup logic use finalizers. | ||
| return ctrl.Result{}, nil | ||
| } | ||
|
|
||
| // Error reading the object - requeue the request. | ||
| return ctrl.Result{}, errors.WithStack(err) | ||
| } | ||
|
|
||
| // Handle deletion reconciliation loop. | ||
| if !cluster.ObjectMeta.DeletionTimestamp.IsZero() || !r.MonitoringEnabled { | ||
| logger.Info("Handling deletion for Cluster", "cluster", cluster.Name) | ||
| return r.reconcileDelete(ctx, cluster) | ||
| } | ||
|
|
||
| logger.Info("Reconciling Cluster", "cluster", cluster.Name) | ||
| // Handle normal reconciliation loop. | ||
| return r.reconcile(ctx, cluster) | ||
| } | ||
|
|
||
| // reconcile handles cluster reconciliation. | ||
| func (r *ClusterMonitoringReconciler) reconcile(ctx context.Context, cluster *clusterv1.Cluster) (ctrl.Result, error) { | ||
| logger := log.FromContext(ctx).WithValues("cluster", cluster.Name) | ||
|
|
||
| // Add finalizer first if not set to avoid the race condition between init and delete. | ||
| // Note: Finalizers in general can only be added when the deletionTimestamp is not set. | ||
| if !controllerutil.ContainsFinalizer(cluster, monitoring.MonitoringFinalizer) { | ||
| logger.Info("adding finalizer", "finalizer", monitoring.MonitoringFinalizer) | ||
| controllerutil.AddFinalizer(cluster, monitoring.MonitoringFinalizer) | ||
| err := r.Client.Update(ctx, cluster) | ||
| if err != nil { | ||
| logger.Error(err, "failed to add finalizer", "finalizer", monitoring.MonitoringFinalizer) | ||
| return ctrl.Result{}, errors.WithStack(err) | ||
| } | ||
| logger.Info("added finalizer", "finalizer", monitoring.MonitoringFinalizer) | ||
| return ctrl.Result{}, nil | ||
| } | ||
|
|
||
| if cluster.Name == r.ManagementCluster.Name { | ||
| err := r.HeartbeatRepository.CreateOrUpdate(ctx) | ||
| if err != nil { | ||
| logger.Error(err, "failed to create or update heartbeat") | ||
| return ctrl.Result{Requeue: true}, errors.WithStack(err) | ||
| } | ||
| } | ||
|
|
||
| return ctrl.Result{}, nil | ||
| } | ||
|
|
||
| // reconcileDelete handles cluster deletion. | ||
| func (r *ClusterMonitoringReconciler) reconcileDelete(ctx context.Context, cluster *clusterv1.Cluster) (reconcile.Result, error) { | ||
| logger := log.FromContext(ctx).WithValues("cluster", cluster.Name) | ||
| if controllerutil.ContainsFinalizer(cluster, monitoring.MonitoringFinalizer) { | ||
|
|
||
| if cluster.Name == r.ManagementCluster.Name { | ||
| err := r.HeartbeatRepository.Delete(ctx) | ||
| if err != nil { | ||
| logger.Error(err, "failed to delete heartbeat") | ||
| return ctrl.Result{Requeue: true}, errors.WithStack(err) | ||
| } | ||
| } | ||
|
|
||
| // We get the latest state of the object to avoid race conditions. | ||
| // Finalizer handling needs to come last. | ||
| logger.Info("removing finalizer", "finalizer", monitoring.MonitoringFinalizer) | ||
| controllerutil.RemoveFinalizer(cluster, monitoring.MonitoringFinalizer) | ||
| err := r.Client.Update(ctx, cluster) | ||
| if err != nil { | ||
| // We need to requeue if we fail to remove the finalizer because of race conditions between multiple operators. | ||
| // This will be eventually consistent. | ||
| logger.Error(err, "failed to remove finalizer, requeuing", "finalizer", monitoring.MonitoringFinalizer) | ||
| return ctrl.Result{Requeue: true}, nil | ||
| } | ||
| logger.Info("removed finalizer", "finalizer", monitoring.MonitoringFinalizer) | ||
| } | ||
| controllerutil.RemoveFinalizer(cluster, monitoring.MonitoringFinalizer) | ||
| return ctrl.Result{}, nil | ||
| } |
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