-
Notifications
You must be signed in to change notification settings - Fork 463
/
backup_entry.go
175 lines (149 loc) · 6.83 KB
/
backup_entry.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
// Copyright (c) 2019 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 backupentry
import (
"context"
"fmt"
"sync"
"time"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
"github.com/gardener/gardener/pkg/client/kubernetes/clientmap"
"github.com/gardener/gardener/pkg/client/kubernetes/clientmap/keys"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/features"
"github.com/gardener/gardener/pkg/gardenlet/apis/config"
confighelper "github.com/gardener/gardener/pkg/gardenlet/apis/config/helper"
gardenletfeatures "github.com/gardener/gardener/pkg/gardenlet/features"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"k8s.io/utils/pointer"
runtimecache "sigs.k8s.io/controller-runtime/pkg/cache"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
// ControllerName is the name of this controller.
const ControllerName = "backupentry"
// Controller controls BackupEntries.
type Controller struct {
log logr.Logger
config *config.GardenletConfiguration
reconciler reconcile.Reconciler
migrationReconciler reconcile.Reconciler
backupEntryInformer runtimecache.Informer
seedInformer runtimecache.Informer
backupEntryQueue workqueue.RateLimitingInterface
backupEntryMigrationQueue workqueue.RateLimitingInterface
workerCh chan int
numberOfRunningWorkers int
}
// NewBackupEntryController takes a Kubernetes client for the Garden clusters <k8sGardenClient>, a struct
// holding information about the acting Gardener, a <backupEntryInformer>, and a <recorder> for
// event recording. It creates a new Gardener controller.
func NewBackupEntryController(
ctx context.Context,
log logr.Logger,
clientMap clientmap.ClientMap,
config *config.GardenletConfiguration,
recorder record.EventRecorder,
) (
*Controller,
error,
) {
log = log.WithName(ControllerName)
gardenClient, err := clientMap.GetClient(ctx, keys.ForGarden())
if err != nil {
return nil, fmt.Errorf("failed to get garden client: %w", err)
}
backupEntryInformer, err := gardenClient.Cache().GetInformer(ctx, &gardencorev1beta1.BackupEntry{})
if err != nil {
return nil, fmt.Errorf("failed to get BackupEntry Informer: %w", err)
}
seedInformer, err := gardenClient.Cache().GetInformer(ctx, &gardencorev1beta1.Seed{})
if err != nil {
return nil, fmt.Errorf("could not get Seed informer: %w", err)
}
controller := &Controller{
log: log,
config: config,
reconciler: newReconciler(clientMap, config, recorder),
migrationReconciler: newMigrationReconciler(gardenClient, config),
backupEntryInformer: backupEntryInformer,
seedInformer: seedInformer,
backupEntryQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "BackupEntry"),
backupEntryMigrationQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "BackupEntryMigration"),
workerCh: make(chan int),
}
controller.backupEntryInformer.AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: controllerutils.BackupEntryFilterFunc(confighelper.SeedNameFromSeedConfig(config.SeedConfig)),
Handler: cache.ResourceEventHandlerFuncs{
AddFunc: controller.backupEntryAdd,
UpdateFunc: controller.backupEntryUpdate,
DeleteFunc: controller.backupEntryDelete,
},
})
if gardenletfeatures.FeatureGate.Enabled(features.ForceRestore) && confighelper.OwnerChecksEnabledInSeedConfig(config.SeedConfig) {
controller.backupEntryInformer.AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: controllerutils.BackupEntryMigrationFilterFunc(ctx, gardenClient.Cache(), confighelper.SeedNameFromSeedConfig(config.SeedConfig)),
Handler: cache.ResourceEventHandlerFuncs{
AddFunc: controller.backupEntryMigrationAdd,
UpdateFunc: controller.backupEntryMigrationUpdate,
DeleteFunc: controller.backupEntryMigrationDelete,
},
})
}
return controller, nil
}
// Run runs the Controller until the given stop channel can be read from.
func (c *Controller) Run(ctx context.Context, workers, migrationWorkers int) {
var waitGroup sync.WaitGroup
if !cache.WaitForCacheSync(ctx.Done(), c.backupEntryInformer.HasSynced, c.seedInformer.HasSynced) {
c.log.Error(wait.ErrWaitTimeout, "Timed out waiting for caches to sync")
return
}
// Count number of running workers.
go func() {
for res := range c.workerCh {
c.numberOfRunningWorkers += res
}
}()
c.log.Info("BackupEntry controller initialized")
for i := 0; i < workers; i++ {
controllerutils.CreateWorker(ctx, c.backupEntryQueue, "BackupEntry", c.reconciler, &waitGroup, c.workerCh, controllerutils.WithLogger(c.log.WithName(reconcilerName)))
}
if gardenletfeatures.FeatureGate.Enabled(features.ForceRestore) && confighelper.OwnerChecksEnabledInSeedConfig(c.config.SeedConfig) {
for i := 0; i < migrationWorkers; i++ {
controllerutils.CreateWorker(ctx, c.backupEntryMigrationQueue, "BackupEntry Migration", c.migrationReconciler, &waitGroup, c.workerCh, controllerutils.WithLogger(c.log.WithName(migrationReconcilerName)))
}
}
// Shutdown handling
<-ctx.Done()
c.backupEntryQueue.ShutDown()
c.backupEntryMigrationQueue.ShutDown()
for {
queueLengths := c.backupEntryQueue.Len() + c.backupEntryMigrationQueue.Len()
if queueLengths == 0 && c.numberOfRunningWorkers == 0 {
c.log.V(1).Info("No running BackupEntry worker and no items left in the queues. Terminated BackupEntry controller")
break
}
c.log.V(1).Info("Waiting for BackupEntry workers to finish", "numberOfRunningWorkers", c.numberOfRunningWorkers, "queueLength", queueLengths)
time.Sleep(5 * time.Second)
}
waitGroup.Wait()
}
// IsBackupEntryManagedByThisGardenlet checks if the given BackupEntry is managed by this gardenlet by comparing it with the seed name from the GardenletConfiguration.
func IsBackupEntryManagedByThisGardenlet(backupEntry *gardencorev1beta1.BackupEntry, gc *config.GardenletConfiguration) bool {
return pointer.StringDeref(backupEntry.Spec.SeedName, "") == confighelper.SeedNameFromSeedConfig(gc.SeedConfig)
}