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shoot_hibernation_types.go
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/
shoot_hibernation_types.go
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// Copyright (c) 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 shoot
import (
"context"
"fmt"
"sync"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
"github.com/robfig/cron"
"github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/equality"
"k8s.io/client-go/tools/record"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// Cron is an interface that allows mocking cron.Cron.
type Cron interface {
Schedule(schedule cron.Schedule, job cron.Job)
Start()
Stop()
}
// HibernationSchedule is a mapping from location to a Cron.
// It controls the hibernation process of a certain shoot.
type HibernationSchedule map[string]Cron
// Stop implements Cron.
func (h *HibernationSchedule) Stop() {
for _, c := range *h {
c.Stop()
}
}
// Start implements Cron.
func (h *HibernationSchedule) Start() {
for _, c := range *h {
c.Start()
}
}
type hibernationScheduleRegistry struct {
data sync.Map
}
// HibernationScheduleRegistry is a goroutine-safe mapping of Shoot key to HibernationSchedule.
type HibernationScheduleRegistry interface {
Load(key string) (schedule HibernationSchedule, ok bool)
Store(key string, schedule HibernationSchedule)
Delete(key string)
}
// Store implements HibernationScheduleRegistry.
func (h *hibernationScheduleRegistry) Store(key string, schedule HibernationSchedule) {
h.data.Store(key, schedule)
}
// Delete implements HibernationScheduleRegistry.
func (h *hibernationScheduleRegistry) Delete(key string) {
h.data.Delete(key)
}
// Load implements HibernationScheduleRegistry.
func (h *hibernationScheduleRegistry) Load(key string) (schedule HibernationSchedule, ok bool) {
sched, ok := h.data.Load(key)
if !ok {
return nil, false
}
return sched.(HibernationSchedule), ok
}
// NewHibernationScheduleRegistry instantiates a new HibernationScheduleRegistry.
func NewHibernationScheduleRegistry() HibernationScheduleRegistry {
return &hibernationScheduleRegistry{}
}
type hibernationJob struct {
ctx context.Context
gardenClient client.Client
logger logrus.FieldLogger
recorder record.EventRecorder
target *gardencorev1beta1.Shoot
enabled bool
}
// Run implements cron.Job.
func (h *hibernationJob) Run() {
h.logger.Infof("Setting hibernation.enabled to %t", h.enabled)
if err := func() error {
shoot := &gardencorev1beta1.Shoot{}
if err := h.gardenClient.Get(h.ctx, client.ObjectKeyFromObject(h.target), shoot); err != nil {
return err
}
patch := client.MergeFrom(shoot.DeepCopy())
if shoot.Spec.Hibernation == nil || !equality.Semantic.DeepEqual(h.target.Spec.Hibernation.Schedules, shoot.Spec.Hibernation.Schedules) {
return fmt.Errorf("shoot %s/%s hibernation schedule changed mid-air", shoot.Namespace, shoot.Name)
}
if shoot.Status.LastOperation == nil || shoot.Status.LastOperation.State != gardencorev1beta1.LastOperationStateFailed {
shoot.Spec.Hibernation.Enabled = &h.enabled
}
return h.gardenClient.Patch(h.ctx, shoot, patch)
}(); err != nil {
h.logger.Errorf("Could not set hibernation.enabled to %t: %+v", h.enabled, err)
return
}
if h.enabled {
msg := "Hibernating cluster due to schedule"
h.recorder.Eventf(h.target, corev1.EventTypeNormal, gardencorev1beta1.ShootEventHibernationEnabled, "%s", msg)
} else {
msg := "Waking up cluster due to schedule"
h.recorder.Eventf(h.target, corev1.EventTypeNormal, gardencorev1beta1.ShootEventHibernationDisabled, "%s", msg)
}
}
// NewHibernationJob creates a new cron.Job that sets the hibernation of the given shoot to enabled when it triggers.
func NewHibernationJob(ctx context.Context, gardenClient client.Client, logger logrus.FieldLogger, recorder record.EventRecorder, target *gardencorev1beta1.Shoot, enabled bool) cron.Job {
return &hibernationJob{ctx, gardenClient, logger, recorder, target, enabled}
}