/
reconciler.go
177 lines (151 loc) · 5.42 KB
/
reconciler.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
176
177
// Copyright 2021 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 garbagecollector
import (
"context"
"time"
"github.com/hashicorp/go-multierror"
appsv1 "k8s.io/api/apps/v1"
batchv1 "k8s.io/api/batch/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/wait"
"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"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/resourcemanager/apis/config"
"github.com/gardener/gardener/pkg/resourcemanager/controller/garbagecollector/references"
errorsutils "github.com/gardener/gardener/pkg/utils/errors"
)
// Reconciler performs garbage collection.
type Reconciler struct {
TargetReader client.Reader
TargetWriter client.Writer
Config config.GarbageCollectorControllerConfig
Clock clock.Clock
MinimumObjectLifetime *time.Duration
}
// Reconcile performs the main reconciliation logic.
func (r *Reconciler) Reconcile(reconcileCtx context.Context, _ reconcile.Request) (reconcile.Result, error) {
log := logf.FromContext(reconcileCtx)
ctx, cancel := controllerutils.GetMainReconciliationContext(reconcileCtx, r.Config.SyncPeriod.Duration)
defer cancel()
log.Info("Starting garbage collection")
defer log.Info("Garbage collection finished")
var (
labels = client.MatchingLabels{references.LabelKeyGarbageCollectable: references.LabelValueGarbageCollectable}
objectsToGarbageCollect = map[objectId]struct{}{}
)
for _, resource := range []struct {
kind string
listKind string
}{
{references.KindSecret, "SecretList"},
{references.KindConfigMap, "ConfigMapList"},
} {
objList := &metav1.PartialObjectMetadataList{}
objList.SetGroupVersionKind(corev1.SchemeGroupVersion.WithKind(resource.listKind))
if err := r.TargetReader.List(ctx, objList, labels); err != nil {
return reconcile.Result{}, err
}
for _, obj := range objList.Items {
if obj.CreationTimestamp.Add(*r.MinimumObjectLifetime).UTC().After(r.Clock.Now().UTC()) {
// Do not consider recently created objects for garbage collection.
continue
}
objectsToGarbageCollect[objectId{resource.kind, obj.Namespace, obj.Name}] = struct{}{}
}
}
var (
items []metav1.PartialObjectMetadata
groupVersionKinds = []schema.GroupVersionKind{
appsv1.SchemeGroupVersion.WithKind("DeploymentList"),
appsv1.SchemeGroupVersion.WithKind("StatefulSetList"),
appsv1.SchemeGroupVersion.WithKind("DaemonSetList"),
batchv1.SchemeGroupVersion.WithKind("JobList"),
corev1.SchemeGroupVersion.WithKind("PodList"),
batchv1.SchemeGroupVersion.WithKind("CronJobList"),
resourcesv1alpha1.SchemeGroupVersion.WithKind("ManagedResourceList"),
}
)
for _, gvk := range groupVersionKinds {
objList := &metav1.PartialObjectMetadataList{}
objList.SetGroupVersionKind(gvk)
if err := r.TargetReader.List(ctx, objList); err != nil {
if !meta.IsNoMatchError(err) {
return reconcile.Result{}, err
}
}
items = append(items, objList.Items...)
}
for _, objectMeta := range items {
for key, objectName := range objectMeta.Annotations {
objectKind := references.KindFromAnnotationKey(key)
if objectKind == "" || objectName == "" {
continue
}
delete(objectsToGarbageCollect, objectId{objectKind, objectMeta.Namespace, objectName})
}
}
var (
results = make(chan error, 1)
wg wait.Group
errorList = &multierror.Error{ErrorFormat: errorsutils.NewErrorFormatFuncWithPrefix("Could not delete all unused resources")}
)
for id := range objectsToGarbageCollect {
objId := id
wg.StartWithContext(ctx, func(ctx context.Context) {
var (
meta = metav1.ObjectMeta{Namespace: objId.namespace, Name: objId.name}
obj client.Object
)
switch objId.kind {
case references.KindSecret:
obj = &corev1.Secret{ObjectMeta: meta}
case references.KindConfigMap:
obj = &corev1.ConfigMap{ObjectMeta: meta}
default:
return
}
log.Info("Delete resource",
"kind", objId.kind,
"namespace", objId.namespace,
"name", objId.name,
)
if err := r.TargetWriter.Delete(ctx, obj); client.IgnoreNotFound(err) != nil {
results <- err
}
})
}
go func() {
wg.Wait()
close(results)
}()
for err := range results {
if err != nil {
errorList = multierror.Append(errorList, err)
}
}
return reconcile.Result{Requeue: true, RequeueAfter: r.Config.SyncPeriod.Duration}, errorList.ErrorOrNil()
}
type objectId struct {
kind string
namespace string
name string
}