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/
state_reconciler.go
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/
state_reconciler.go
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// Copyright (c) 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 worker
import (
"context"
"fmt"
extensionscontroller "github.com/gardener/gardener-extensions/pkg/controller"
"github.com/gardener/gardener-extensions/pkg/util"
corev1 "k8s.io/api/core/v1"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
gardencorev1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/client-go/tools/record"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/runtime/inject"
)
const (
// StartToSyncState is used as part of the Event 'reason' when a Worker state starts to synchronize
StartToSyncState = "SynchronizingState"
// SuccessSynced is used as part of the Event 'reason' when a Worker state is synced
SuccessSynced = "StateSynced"
// ErrorStateSync is used as part of the Event 'reason' when a Worker state fail to sync
ErrorStateSync = "ErrorSynchronizingState"
// StateSyncControllerName is the name of the controller which synchronize the Worker state
StateSyncControllerName = "worker-state-controller"
)
type stateReconciler struct {
logger logr.Logger
actuator StateActuator
recorder record.EventRecorder
ctx context.Context
client client.Client
}
// NewStateReconciler creates a new reconcile.Reconciler that reconciles
// Worker's State resources of Gardener's `extensions.gardener.cloud` API group.
func NewStateReconciler(mgr manager.Manager, actuator StateActuator) reconcile.Reconciler {
return &stateReconciler{
logger: log.Log.WithName(StateUpdatingControllerName),
actuator: actuator,
recorder: mgr.GetEventRecorderFor(StateSyncControllerName),
}
}
func (r *stateReconciler) InjectFunc(f inject.Func) error {
return f(r.actuator)
}
func (r *stateReconciler) InjectClient(client client.Client) error {
r.client = client
return nil
}
func (r *stateReconciler) InjectStopChannel(stopCh <-chan struct{}) error {
r.ctx = util.ContextFromStopChannel(stopCh)
return nil
}
func (r *stateReconciler) Reconcile(request reconcile.Request) (reconcile.Result, error) {
worker := &extensionsv1alpha1.Worker{}
if err := r.client.Get(r.ctx, request.NamespacedName, worker); err != nil {
if errors.IsNotFound(err) {
return reconcile.Result{}, nil
}
return reconcile.Result{}, err
}
// Deletion flow
if worker.DeletionTimestamp != nil {
//Nothing to do
return reconcile.Result{}, nil
}
// Reconcile flow
operationType := gardencorev1beta1helper.ComputeOperationType(worker.ObjectMeta, worker.Status.LastOperation)
if operationType != gardencorev1beta1.LastOperationTypeReconcile {
return reconcile.Result{Requeue: true}, nil
} else if isWorkerMigrated(worker) {
//Nothing to do
return reconcile.Result{}, nil
}
r.recorder.Event(worker, corev1.EventTypeNormal, StartToSyncState, "Updating the worker state")
if err := r.actuator.Reconcile(r.ctx, worker); err != nil {
msg := "Error updating worker state"
r.logger.Error(err, msg, "worker", fmt.Sprintf("%s/%s", worker.Namespace, worker.Name))
r.recorder.Event(worker, corev1.EventTypeWarning, ErrorStateSync, msg)
return extensionscontroller.ReconcileErr(err)
}
msg := "Successfully update worker state"
r.logger.Info(msg, "worker", fmt.Sprintf("%s/%s", worker.Namespace, worker.Name))
r.recorder.Event(worker, corev1.EventTypeNormal, SuccessSynced, msg)
return reconcile.Result{}, nil
}