/
reconciler.go
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/
reconciler.go
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// Copyright 2018 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 care
import (
"context"
"fmt"
"time"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/clock"
"sigs.k8s.io/controller-runtime/pkg/client"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
v1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/gardenlet/apis/config"
"github.com/gardener/gardener/pkg/utils/kubernetes/health"
)
// Reconciler reconciles ControllerInstallations, checks their health status and reports it via conditions.
type Reconciler struct {
GardenClient client.Client
SeedClient client.Client
Config config.ControllerInstallationCareControllerConfiguration
Clock clock.Clock
GardenNamespace string
}
// Reconcile reconciles ControllerInstallations, checks their health status and reports it via conditions.
func (r *Reconciler) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
log := logf.FromContext(ctx)
gardenCtx, cancel := controllerutils.GetMainReconciliationContext(ctx, r.Config.SyncPeriod.Duration)
defer cancel()
seedCtx, cancel := controllerutils.GetChildReconciliationContext(ctx, r.Config.SyncPeriod.Duration)
defer cancel()
controllerInstallation := &gardencorev1beta1.ControllerInstallation{}
if err := r.GardenClient.Get(gardenCtx, request.NamespacedName, controllerInstallation); err != nil {
if apierrors.IsNotFound(err) {
log.V(1).Info("Object is gone, stop reconciling")
return reconcile.Result{}, nil
}
return reconcile.Result{}, fmt.Errorf("error retrieving object from store: %w", err)
}
if controllerInstallation.DeletionTimestamp != nil {
return reconcile.Result{}, nil
}
var (
conditionControllerInstallationInstalled = v1beta1helper.GetOrInitConditionWithClock(r.Clock, controllerInstallation.Status.Conditions, gardencorev1beta1.ControllerInstallationInstalled)
conditionControllerInstallationHealthy = v1beta1helper.GetOrInitConditionWithClock(r.Clock, controllerInstallation.Status.Conditions, gardencorev1beta1.ControllerInstallationHealthy)
conditionControllerInstallationProgressing = v1beta1helper.GetOrInitConditionWithClock(r.Clock, controllerInstallation.Status.Conditions, gardencorev1beta1.ControllerInstallationProgressing)
)
managedResource := &resourcesv1alpha1.ManagedResource{
ObjectMeta: metav1.ObjectMeta{
Name: controllerInstallation.Name,
Namespace: r.GardenNamespace,
},
}
if err := r.SeedClient.Get(seedCtx, client.ObjectKeyFromObject(managedResource), managedResource); err != nil {
msg := fmt.Sprintf("Failed to get ManagedResource %q: %s", client.ObjectKeyFromObject(managedResource).String(), err.Error())
conditionControllerInstallationInstalled = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationInstalled, gardencorev1beta1.ConditionUnknown, "SeedReadError", msg)
conditionControllerInstallationHealthy = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationHealthy, gardencorev1beta1.ConditionUnknown, "SeedReadError", msg)
conditionControllerInstallationProgressing = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationProgressing, gardencorev1beta1.ConditionUnknown, "SeedReadError", msg)
patch := client.StrategicMergeFrom(controllerInstallation.DeepCopy())
controllerInstallation.Status.Conditions = v1beta1helper.MergeConditions(controllerInstallation.Status.Conditions, conditionControllerInstallationHealthy, conditionControllerInstallationInstalled, conditionControllerInstallationProgressing)
if err := r.GardenClient.Status().Patch(gardenCtx, controllerInstallation, patch); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to patch conditions: %w", err)
}
if apierrors.IsNotFound(err) {
log.Info("ManagedResource was not found yet, requeuing", "managedResource", client.ObjectKeyFromObject(managedResource))
return reconcile.Result{RequeueAfter: time.Second}, nil
}
return reconcile.Result{}, err
}
if err := health.CheckManagedResourceApplied(managedResource); err != nil {
conditionControllerInstallationInstalled = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationInstalled, gardencorev1beta1.ConditionFalse, "InstallationPending", err.Error())
} else {
conditionControllerInstallationInstalled = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationInstalled, gardencorev1beta1.ConditionTrue, "InstallationSuccessful", "The controller was successfully installed in the seed cluster.")
}
if err := health.CheckManagedResourceHealthy(managedResource); err != nil {
conditionControllerInstallationHealthy = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationHealthy, gardencorev1beta1.ConditionFalse, "ControllerNotHealthy", err.Error())
} else {
conditionControllerInstallationHealthy = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationHealthy, gardencorev1beta1.ConditionTrue, "ControllerHealthy", "The controller running in the seed cluster is healthy.")
}
if err := health.CheckManagedResourceProgressing(managedResource); err != nil {
conditionControllerInstallationProgressing = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationProgressing, gardencorev1beta1.ConditionTrue, "ControllerNotRolledOut", err.Error())
} else {
conditionControllerInstallationProgressing = v1beta1helper.UpdatedConditionWithClock(r.Clock, conditionControllerInstallationProgressing, gardencorev1beta1.ConditionFalse, "ControllerRolledOut", "The controller has been rolled out successfully.")
}
patch := client.StrategicMergeFrom(controllerInstallation.DeepCopy())
controllerInstallation.Status.Conditions = v1beta1helper.MergeConditions(controllerInstallation.Status.Conditions, conditionControllerInstallationHealthy, conditionControllerInstallationInstalled, conditionControllerInstallationProgressing)
if err := r.GardenClient.Status().Patch(gardenCtx, controllerInstallation, patch); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to patch conditions: %w", err)
}
return reconcile.Result{RequeueAfter: r.Config.SyncPeriod.Duration}, nil
}