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reconciler.go
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reconciler.go
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// Copyright (c) 2022 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"
"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"
gardencorev1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
"github.com/gardener/gardener/pkg/gardenlet/apis/config"
)
var (
// NewSeed is used to create a new `operation.Operation` instance.
NewSeed = defaultNewSeedObjectFunc
// NewHealthCheck is used to create a new Health check instance.
NewHealthCheck = defaultNewHealthCheck
)
// Reconciler reconciles Seed resources and executes health check operations.
type Reconciler struct {
GardenClient client.Client
SeedClient client.Client
Config config.SeedCareControllerConfiguration
Namespace *string
SeedName string
}
// Reconcile reconciles Seed resources and executes health check operations.
func (r *Reconciler) Reconcile(reconcileCtx context.Context, req reconcile.Request) (reconcile.Result, error) {
log := logf.FromContext(reconcileCtx)
seed := &gardencorev1beta1.Seed{}
if err := r.GardenClient.Get(reconcileCtx, req.NamespacedName, seed); 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)
}
ctx, cancel := context.WithTimeout(reconcileCtx, r.Config.SyncPeriod.Duration)
defer cancel()
log.V(1).Info("Starting seed care")
// Initialize conditions based on the current status.
conditionTypes := []gardencorev1beta1.ConditionType{gardencorev1beta1.SeedSystemComponentsHealthy}
var conditions []gardencorev1beta1.Condition
for _, cond := range conditionTypes {
conditions = append(conditions, gardencorev1beta1helper.GetOrInitCondition(seed.Status.Conditions, cond))
}
// Trigger health check
updatedConditions := NewHealthCheck(seed, r.SeedClient, r.Namespace).CheckSeed(ctx, conditions, r.conditionThresholdsToProgressingMapping())
// Update Seed status conditions if necessary
if gardencorev1beta1helper.ConditionsNeedUpdate(conditions, updatedConditions) {
// Rebuild seed conditions to ensure that only the conditions with the
// correct types will be updated, and any other conditions will remain intact
conditions = buildSeedConditions(seed.Status.Conditions, updatedConditions, conditionTypes)
log.Info("Updating seed status conditions")
patch := client.StrategicMergeFrom(seed.DeepCopy())
seed.Status.Conditions = conditions
if err := r.GardenClient.Status().Patch(ctx, seed, patch); err != nil {
log.Error(err, "Could not update Seed status")
return reconcile.Result{}, err
}
}
return reconcile.Result{RequeueAfter: r.Config.SyncPeriod.Duration}, nil
}
func (r *Reconciler) conditionThresholdsToProgressingMapping() map[gardencorev1beta1.ConditionType]time.Duration {
out := make(map[gardencorev1beta1.ConditionType]time.Duration)
for _, threshold := range r.Config.ConditionThresholds {
out[gardencorev1beta1.ConditionType(threshold.Type)] = threshold.Duration.Duration
}
return out
}
// buildSeedConditions builds and returns the seed conditions using the given seed conditions as a base,
// by first removing all conditions with the given types and then merging the given conditions (which must be of the same types).
func buildSeedConditions(seedConditions []gardencorev1beta1.Condition, conditions []gardencorev1beta1.Condition, conditionTypes []gardencorev1beta1.ConditionType) []gardencorev1beta1.Condition {
result := gardencorev1beta1helper.RemoveConditions(seedConditions, conditionTypes...)
result = gardencorev1beta1helper.MergeConditions(result, conditions...)
return result
}