-
Notifications
You must be signed in to change notification settings - Fork 458
/
add.go
107 lines (91 loc) · 4.04 KB
/
add.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
// Copyright (c) 2020 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 secret
import (
"fmt"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils/mapper"
managerpredicate "github.com/gardener/gardener/pkg/resourcemanager/predicate"
"github.com/spf13/pflag"
corev1 "k8s.io/api/core/v1"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/source"
)
// ControllerName is the name of the secret controller.
const ControllerName = "secret"
// defaultControllerConfig is the default config for the controller.
var defaultControllerConfig ControllerConfig
// ControllerOptions are options for adding the controller to a Manager.
type ControllerOptions struct {
maxConcurrentWorkers int
}
// ControllerConfig is the completed configuration for the controller.
type ControllerConfig struct {
MaxConcurrentWorkers int
ClassFilter managerpredicate.ClassFilter
}
// AddToManagerWithOptions adds the controller to a Manager with the given config.
func AddToManagerWithOptions(mgr manager.Manager, conf ControllerConfig) error {
secretController, err := controller.New(ControllerName, mgr, controller.Options{
MaxConcurrentReconciles: conf.MaxConcurrentWorkers,
Reconciler: &Reconciler{
ClassFilter: &conf.ClassFilter,
},
RecoverPanic: true,
})
if err != nil {
return fmt.Errorf("unable to set up secret controller: %w", err)
}
if err := secretController.Watch(
&source.Kind{Type: &resourcesv1alpha1.ManagedResource{}},
mapper.EnqueueRequestsFrom(mapper.MapFunc(mapManagedResourcesToSecrets), mapper.UpdateWithOldAndNew, secretController.GetLogger()),
predicate.GenerationChangedPredicate{},
); err != nil {
return fmt.Errorf("unable to watch ManagedResources: %w", err)
}
// Also watch secrets to ensure, that we properly remove the finalizer in case we missed an important
// update event for a ManagedResource during downtime.
if err := secretController.Watch(
&source.Kind{Type: &corev1.Secret{}},
&handler.EnqueueRequestForObject{},
// Only requeue secrets from create/update events with the controller's finalizer to not flood the controller
// with too many unnecessary requests for all secrets in cluster/namespace.
managerpredicate.HasFinalizer(conf.ClassFilter.FinalizerName()),
); err != nil {
return fmt.Errorf("unable to watch Secrets: %w", err)
}
return nil
}
// AddToManager adds the controller to a Manager using the default config.
func AddToManager(mgr manager.Manager) error {
return AddToManagerWithOptions(mgr, defaultControllerConfig)
}
// AddFlags adds the needed command line flags to the given FlagSet.
func (o *ControllerOptions) AddFlags(fs *pflag.FlagSet) {
fs.IntVar(&o.maxConcurrentWorkers, "secret-max-concurrent-workers", 5, "number of worker threads for concurrent secret reconciliation of resources")
}
// Complete completes the given command line flags and set the defaultControllerConfig accordingly.
func (o *ControllerOptions) Complete() error {
defaultControllerConfig = ControllerConfig{
MaxConcurrentWorkers: o.maxConcurrentWorkers,
}
return nil
}
// Completed returns the completed ControllerConfig.
func (o *ControllerOptions) Completed() *ControllerConfig {
return &defaultControllerConfig
}