forked from openshift/library-go
/
node_controller.go
206 lines (174 loc) · 6.08 KB
/
node_controller.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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
package node
import (
"context"
"fmt"
"strings"
"time"
coreapiv1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/selection"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/informers"
corelisterv1 "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog"
operatorv1 "github.com/openshift/api/operator/v1"
"github.com/openshift/library-go/pkg/operator/condition"
"github.com/openshift/library-go/pkg/operator/events"
"github.com/openshift/library-go/pkg/operator/v1helpers"
)
const nodeControllerWorkQueueKey = "key"
// NodeController watches for new master nodes and adds them to the node status list in the operator config status.
type NodeController struct {
operatorClient v1helpers.StaticPodOperatorClient
nodeLister corelisterv1.NodeLister
cachesToSync []cache.InformerSynced
queue workqueue.RateLimitingInterface
eventRecorder events.Recorder
}
// NewNodeController creates a new node controller.
func NewNodeController(
operatorClient v1helpers.StaticPodOperatorClient,
kubeInformersClusterScoped informers.SharedInformerFactory,
eventRecorder events.Recorder,
) *NodeController {
c := &NodeController{
operatorClient: operatorClient,
eventRecorder: eventRecorder.WithComponentSuffix("node-controller"),
nodeLister: kubeInformersClusterScoped.Core().V1().Nodes().Lister(),
queue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "NodeController"),
}
operatorClient.Informer().AddEventHandler(c.eventHandler())
kubeInformersClusterScoped.Core().V1().Nodes().Informer().AddEventHandler(c.eventHandler())
c.cachesToSync = append(c.cachesToSync, operatorClient.Informer().HasSynced)
c.cachesToSync = append(c.cachesToSync, kubeInformersClusterScoped.Core().V1().Nodes().Informer().HasSynced)
return c
}
func (c NodeController) sync() error {
_, originalOperatorStatus, _, err := c.operatorClient.GetStaticPodOperatorState()
if err != nil {
return err
}
selector, err := labels.NewRequirement("node-role.kubernetes.io/master", selection.Equals, []string{""})
if err != nil {
panic(err)
}
nodes, err := c.nodeLister.List(labels.NewSelector().Add(*selector))
if err != nil {
return err
}
newTargetNodeStates := []operatorv1.NodeStatus{}
// remove entries for missing nodes
for i, nodeState := range originalOperatorStatus.NodeStatuses {
found := false
for _, node := range nodes {
if nodeState.NodeName == node.Name {
found = true
}
}
if found {
newTargetNodeStates = append(newTargetNodeStates, originalOperatorStatus.NodeStatuses[i])
} else {
c.eventRecorder.Warningf("MasterNodeRemoved", "Observed removal of master node %s", nodeState.NodeName)
}
}
// add entries for new nodes
for _, node := range nodes {
found := false
for _, nodeState := range originalOperatorStatus.NodeStatuses {
if nodeState.NodeName == node.Name {
found = true
}
}
if found {
continue
}
c.eventRecorder.Eventf("MasterNodeObserved", "Observed new master node %s", node.Name)
newTargetNodeStates = append(newTargetNodeStates, operatorv1.NodeStatus{NodeName: node.Name})
}
// detect and report master nodes that are not ready
notReadyNodes := []string{}
for _, node := range nodes {
for _, con := range node.Status.Conditions {
if con.Type == coreapiv1.NodeReady && con.Status != coreapiv1.ConditionTrue {
notReadyNodes = append(notReadyNodes, node.Name)
}
}
}
newCondition := operatorv1.OperatorCondition{
Type: condition.NodeControllerDegradedConditionType,
}
if len(notReadyNodes) > 0 {
newCondition.Status = operatorv1.ConditionTrue
newCondition.Reason = "MasterNodesReady"
newCondition.Message = fmt.Sprintf("The master node(s) %q not ready", strings.Join(notReadyNodes, ","))
} else {
newCondition.Status = operatorv1.ConditionFalse
newCondition.Reason = "MasterNodesReady"
newCondition.Message = "All master node(s) are ready"
}
oldStatus := &operatorv1.StaticPodOperatorStatus{}
_, updated, updateError := v1helpers.UpdateStaticPodStatus(c.operatorClient, v1helpers.UpdateStaticPodConditionFn(newCondition), func(status *operatorv1.StaticPodOperatorStatus) error {
status.NodeStatuses = newTargetNodeStates
return nil
}, func(status *operatorv1.StaticPodOperatorStatus) error {
//a hack for storing the old status (before the update)
oldStatus = status
return nil
})
if updateError != nil {
return updateError
}
if !updated {
return nil
}
for _, oldCondition := range oldStatus.Conditions {
if oldCondition.Type == condition.NodeControllerDegradedConditionType && oldCondition.Message != newCondition.Message {
c.eventRecorder.Eventf("MasterNodesReadyChanged", newCondition.Message)
break
}
}
return nil
}
// Run starts the kube-apiserver and blocks until stopCh is closed.
func (c *NodeController) Run(ctx context.Context, workers int) {
defer utilruntime.HandleCrash()
defer c.queue.ShutDown()
klog.Infof("Starting NodeController")
defer klog.Infof("Shutting down NodeController")
if !cache.WaitForCacheSync(ctx.Done(), c.cachesToSync...) {
return
}
// doesn't matter what workers say, only start one.
go wait.UntilWithContext(ctx, c.runWorker, time.Second)
<-ctx.Done()
}
func (c *NodeController) runWorker(ctx context.Context) {
for c.processNextWorkItem() {
}
}
func (c *NodeController) processNextWorkItem() bool {
dsKey, quit := c.queue.Get()
if quit {
return false
}
defer c.queue.Done(dsKey)
err := c.sync()
if err == nil {
c.queue.Forget(dsKey)
return true
}
utilruntime.HandleError(fmt.Errorf("%v failed with : %v", dsKey, err))
c.queue.AddRateLimited(dsKey)
return true
}
// eventHandler queues the operator to check spec and status
func (c *NodeController) eventHandler() cache.ResourceEventHandler {
return cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) { c.queue.Add(nodeControllerWorkQueueKey) },
UpdateFunc: func(old, new interface{}) { c.queue.Add(nodeControllerWorkQueueKey) },
DeleteFunc: func(obj interface{}) { c.queue.Add(nodeControllerWorkQueueKey) },
}
}