/
builder.go
158 lines (130 loc) · 5.84 KB
/
builder.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
/*
Copyright © 2021 The OpenEBS Authors
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 devicenode
import (
"time"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
typedcorev1 "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog"
clientset "github.com/openebs/device-localpv/pkg/generated/clientset/internalclientset"
openebsScheme "github.com/openebs/device-localpv/pkg/generated/clientset/internalclientset/scheme"
informers "github.com/openebs/device-localpv/pkg/generated/informer/externalversions"
listers "github.com/openebs/device-localpv/pkg/generated/lister/device/v1alpha1"
)
const controllerAgentName = "devicenode-controller"
// NodeController is the controller implementation for device node resources
type NodeController struct {
// kubeclientset is a standard kubernetes clientset
kubeclientset kubernetes.Interface
// clientset is a openebs custom resource package generated for custom API group.
clientset clientset.Interface
NodeLister listers.DeviceNodeLister
// NodeSynced is used for caches sync to get populated
NodeSynced cache.InformerSynced
// workqueue is a rate limited work queue. This is used to queue work to be
// processed instead of performing it as soon as a change happens. This
// means we can ensure we only process a fixed amount of resources at a
// time, and makes it easy to ensure we are never processing the same item
// simultaneously in two different workers.
workqueue workqueue.RateLimitingInterface
// recorder is an event recorder for recording Event resources to the
// Kubernetes API.
recorder record.EventRecorder
// pollInterval controls the polling frequency of syncing up the device metadata.
pollInterval time.Duration
// ownerRef is used to set the owner reference to devicenode objects.
ownerRef metav1.OwnerReference
}
// NodeControllerBuilder is the builder object for controller.
type NodeControllerBuilder struct {
NodeController *NodeController
}
// NewNodeControllerBuilder returns an empty instance of controller builder.
func NewNodeControllerBuilder() *NodeControllerBuilder {
return &NodeControllerBuilder{
NodeController: &NodeController{},
}
}
// withKubeClient fills kube client to controller object.
func (cb *NodeControllerBuilder) withKubeClient(ks kubernetes.Interface) *NodeControllerBuilder {
cb.NodeController.kubeclientset = ks
return cb
}
// withOpenEBSClient fills openebs client to controller object.
func (cb *NodeControllerBuilder) withOpenEBSClient(cs clientset.Interface) *NodeControllerBuilder {
cb.NodeController.clientset = cs
return cb
}
// withNodeLister fills Node lister to controller object.
func (cb *NodeControllerBuilder) withNodeLister(sl informers.SharedInformerFactory) *NodeControllerBuilder {
NodeInformer := sl.Local().V1alpha1().DeviceNodes()
cb.NodeController.NodeLister = NodeInformer.Lister()
return cb
}
// withNodeSynced adds object sync information in cache to controller object.
func (cb *NodeControllerBuilder) withNodeSynced(sl informers.SharedInformerFactory) *NodeControllerBuilder {
NodeInformer := sl.Local().V1alpha1().DeviceNodes()
cb.NodeController.NodeSynced = NodeInformer.Informer().HasSynced
return cb
}
// withWorkqueue adds workqueue to controller object.
func (cb *NodeControllerBuilder) withWorkqueueRateLimiting() *NodeControllerBuilder {
cb.NodeController.workqueue = workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "Node")
return cb
}
// withRecorder adds recorder to controller object.
func (cb *NodeControllerBuilder) withRecorder(ks kubernetes.Interface) *NodeControllerBuilder {
klog.Infof("Creating event broadcaster")
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(klog.Infof)
eventBroadcaster.StartRecordingToSink(&typedcorev1.EventSinkImpl{Interface: ks.CoreV1().Events("")})
recorder := eventBroadcaster.NewRecorder(scheme.Scheme, corev1.EventSource{Component: controllerAgentName})
cb.NodeController.recorder = recorder
return cb
}
// withEventHandler adds event handlers controller object.
func (cb *NodeControllerBuilder) withEventHandler(cvcInformerFactory informers.SharedInformerFactory) *NodeControllerBuilder {
cvcInformer := cvcInformerFactory.Local().V1alpha1().DeviceNodes()
// Set up an event handler for when device node device change.
// Note: rather than setting up the resync period at informer level,
// we are controlling the syncing based on pollInternal. See
// NodeController#Run func for more details.
cvcInformer.Informer().AddEventHandlerWithResyncPeriod(cache.ResourceEventHandlerFuncs{
AddFunc: cb.NodeController.addNode,
UpdateFunc: cb.NodeController.updateNode,
DeleteFunc: cb.NodeController.deleteNode,
}, 0)
return cb
}
func (cb *NodeControllerBuilder) withPollInterval(interval time.Duration) *NodeControllerBuilder {
cb.NodeController.pollInterval = interval
return cb
}
func (cb *NodeControllerBuilder) withOwnerReference(ownerRef metav1.OwnerReference) *NodeControllerBuilder {
cb.NodeController.ownerRef = ownerRef
return cb
}
// Build returns a controller instance.
func (cb *NodeControllerBuilder) Build() (*NodeController, error) {
err := openebsScheme.AddToScheme(scheme.Scheme)
if err != nil {
return nil, err
}
return cb.NodeController, nil
}