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maintenanceevents_controller.go
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/
maintenanceevents_controller.go
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/*
Copyright 2022.
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 clusterresources
import (
"context"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/record"
ctrl "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/controller"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"github.com/instaclustr/operator/apis/clusterresources/v1beta1"
"github.com/instaclustr/operator/pkg/instaclustr"
"github.com/instaclustr/operator/pkg/models"
"github.com/instaclustr/operator/pkg/ratelimiter"
"github.com/instaclustr/operator/pkg/scheduler"
)
// MaintenanceEventsReconciler reconciles a MaintenanceEvents object
type MaintenanceEventsReconciler struct {
client.Client
Scheme *runtime.Scheme
API instaclustr.API
Scheduler scheduler.Interface
EventRecorder record.EventRecorder
}
//+kubebuilder:rbac:groups=clusterresources.instaclustr.com,resources=maintenanceevents,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=clusterresources.instaclustr.com,resources=maintenanceevents/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=clusterresources.instaclustr.com,resources=maintenanceevents/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.
// TODO(user): Modify the Reconcile function to compare the state specified by
// the MaintenanceEvents object against the actual cluster state, and then
// perform operations to make the cluster state reflect the state specified by
// the user.
//
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.12.1/pkg/reconcile
func (r *MaintenanceEventsReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
l := log.FromContext(ctx)
me := &v1beta1.MaintenanceEvents{}
err := r.Client.Get(ctx, req.NamespacedName, me)
if err != nil {
if k8serrors.IsNotFound(err) {
l.Info("Maintenance Event resource is not found",
"request", req,
)
return ctrl.Result{}, nil
}
l.Error(err, "Cannot get Maintenance Event resource",
"request", req,
)
return ctrl.Result{}, err
}
if len(me.Spec.MaintenanceEventsReschedules) == 0 {
err = r.Client.Delete(ctx, me)
if err != nil {
l.Error(err,
"Cannot delete Maintenance Events resource from K8s cluster",
"Maintenance Events spec", me.Spec,
)
r.EventRecorder.Eventf(
me, models.Warning, models.DeletionFailed,
"Resource deletion is failed. Reason: %v",
err,
)
return ctrl.Result{}, err
}
r.EventRecorder.Eventf(
me, models.Normal, models.DeletionStarted,
"Resource is deleted.",
)
l.Info(
"Maintenance Events were rescheduled, resource was deleted",
"Maintenance Events status", me.Status,
)
return ctrl.Result{}, nil
}
if me.Status.CurrentRescheduledEvent.MaintenanceEventID == "" {
meReschedule := &v1beta1.MaintenanceEventReschedule{
MaintenanceEventID: me.Spec.MaintenanceEventsReschedules[len(me.Spec.MaintenanceEventsReschedules)-1].MaintenanceEventID,
ScheduledStartTime: me.Spec.MaintenanceEventsReschedules[len(me.Spec.MaintenanceEventsReschedules)-1].ScheduledStartTime,
}
err = r.API.RescheduleMaintenanceEvent(meReschedule)
if err != nil {
l.Error(err,
"Cannot start Maintenance Event reschedule process",
"Maintenance Event ID", meReschedule.MaintenanceEventID,
)
r.EventRecorder.Eventf(
me, models.Warning, models.CreationFailed,
"Resource creation on the Instaclustr is failed. Reason: %v",
err,
)
return ctrl.Result{}, err
}
r.EventRecorder.Eventf(
me, models.Normal, models.Created,
"Resource reschedule request is sent. Maintenance Event ID: %s",
me.Spec.MaintenanceEventsReschedules[len(me.Spec.MaintenanceEventsReschedules)-1].MaintenanceEventID,
)
patch := me.NewPatch()
me.Spec.MaintenanceEventsReschedules = me.Spec.MaintenanceEventsReschedules[:len(me.Spec.MaintenanceEventsReschedules)-1]
err = r.Patch(ctx, me, patch)
if err != nil {
l.Error(err, "Cannot patch Maintenance Event",
"spec", me.Spec,
)
r.EventRecorder.Eventf(
me, models.Warning, models.PatchFailed,
"Resource patch is failed. Reason: %v",
err,
)
return ctrl.Result{}, err
}
}
return ctrl.Result{}, nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *MaintenanceEventsReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
WithOptions(controller.Options{
RateLimiter: ratelimiter.NewItemExponentialFailureRateLimiterWithMaxTries(ratelimiter.DefaultBaseDelay, ratelimiter.DefaultMaxDelay)}).
For(&v1beta1.MaintenanceEvents{}, builder.WithPredicates(predicate.Funcs{
UpdateFunc: func(event event.UpdateEvent) bool {
return !(event.ObjectNew.GetGeneration() == event.ObjectOld.GetGeneration())
},
})).Complete(r)
}