forked from openshift/machine-api-operator
/
operator.go
221 lines (178 loc) · 6.02 KB
/
operator.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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
package operator
import (
"fmt"
"time"
"github.com/golang/glog"
osclientset "github.com/openshift/client-go/config/clientset/versioned"
"k8s.io/api/core/v1"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
appsinformersv1 "k8s.io/client-go/informers/apps/v1"
coreinformersv1 "k8s.io/client-go/informers/core/v1"
rbacinformersv1 "k8s.io/client-go/informers/rbac/v1"
"k8s.io/client-go/kubernetes"
coreclientsetv1 "k8s.io/client-go/kubernetes/typed/core/v1"
appslisterv1 "k8s.io/client-go/listers/apps/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"sigs.k8s.io/cluster-api/pkg/client/clientset_generated/clientset/scheme"
)
const (
// maxRetries is the number of times a key will be retried before it is dropped out of the queue.
// With the current rate-limiter in use (5ms*2^(maxRetries-1)) the following numbers represent the times
// a machineconfig pool is going to be requeued:
//
// 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms, 640ms, 1.3s, 2.6s, 5.1s, 10.2s, 20.4s, 41s, 82s
maxRetries = 15
ownedManifestsDir = "owned-manifests"
)
// Operator defines machine api operator.
type Operator struct {
namespace, name string
imagesFile string
config string
kubeClient kubernetes.Interface
osClient osclientset.Interface
eventRecorder record.EventRecorder
syncHandler func(ic string) error
deployLister appslisterv1.DeploymentLister
deployListerSynced cache.InformerSynced
// queue only ever has one item, but it has nice error handling backoff/retry semantics
queue workqueue.RateLimitingInterface
}
// New returns a new machine config operator.
func New(
namespace, name string,
imagesFile string,
config string,
serviceAccountInfomer coreinformersv1.ServiceAccountInformer,
deployInformer appsinformersv1.DeploymentInformer,
clusterRoleInformer rbacinformersv1.ClusterRoleInformer,
clusterRoleBindingInformer rbacinformersv1.ClusterRoleBindingInformer,
kubeClient kubernetes.Interface,
osClient osclientset.Interface,
) *Operator {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(glog.Infof)
eventBroadcaster.StartRecordingToSink(&coreclientsetv1.EventSinkImpl{Interface: kubeClient.CoreV1().Events("")})
optr := &Operator{
namespace: namespace,
name: name,
imagesFile: imagesFile,
kubeClient: kubeClient,
osClient: osClient,
eventRecorder: eventBroadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: "machineapioperator"}),
queue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "machineapioperator"),
}
serviceAccountInfomer.Informer().AddEventHandler(optr.eventHandler())
deployInformer.Informer().AddEventHandler(optr.eventHandler())
clusterRoleInformer.Informer().AddEventHandler(optr.eventHandler())
clusterRoleBindingInformer.Informer().AddEventHandler(optr.eventHandler())
optr.config = config
optr.syncHandler = optr.sync
optr.deployLister = deployInformer.Lister()
optr.deployListerSynced = deployInformer.Informer().HasSynced
return optr
}
// Run runs the machine config operator.
func (optr *Operator) Run(workers int, stopCh <-chan struct{}) {
defer utilruntime.HandleCrash()
defer optr.queue.ShutDown()
glog.Info("Starting MachineAPIOperator")
defer glog.Info("Shutting down MachineAPIOperator")
if !cache.WaitForCacheSync(stopCh,
optr.deployListerSynced) {
glog.Error("failed to sync caches")
return
}
glog.Info("Synched up caches")
for i := 0; i < workers; i++ {
go wait.Until(optr.worker, time.Second, stopCh)
}
<-stopCh
}
func (optr *Operator) eventHandler() cache.ResourceEventHandler {
workQueueKey := fmt.Sprintf("%s/%s", optr.namespace, optr.name)
return cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) { optr.queue.Add(workQueueKey) },
UpdateFunc: func(old, new interface{}) { optr.queue.Add(workQueueKey) },
DeleteFunc: func(obj interface{}) { optr.queue.Add(workQueueKey) },
}
}
func (optr *Operator) worker() {
for optr.processNextWorkItem() {
}
}
func (optr *Operator) processNextWorkItem() bool {
glog.V(4).Info("processing next work item")
key, quit := optr.queue.Get()
if quit {
return false
}
defer optr.queue.Done(key)
glog.V(4).Infof("processing key %s", key)
err := optr.syncHandler(key.(string))
optr.handleErr(err, key)
return true
}
func (optr *Operator) handleErr(err error, key interface{}) {
if err == nil {
//TODO: set operator Done.
optr.queue.Forget(key)
return
}
//TODO: set operator degraded.
if optr.queue.NumRequeues(key) < maxRetries {
glog.V(2).Infof("Error syncing operator %v: %v", key, err)
optr.queue.AddRateLimited(key)
return
}
utilruntime.HandleError(err)
glog.V(2).Infof("Dropping operator %q out of the queue: %v", key, err)
optr.queue.Forget(key)
}
func (optr *Operator) sync(key string) error {
startTime := time.Now()
glog.V(4).Infof("Started syncing operator %q (%v)", key, startTime)
defer func() {
glog.V(4).Infof("Finished syncing operator %q (%v)", key, time.Since(startTime))
}()
glog.Infof("Getting operator config using kubeclient")
operatorConfig, err := optr.maoConfigFromInstallConfig()
if err != nil {
glog.Errorf("failed getting operator config: %v", err)
return err
}
return optr.syncAll(*operatorConfig)
}
func (optr *Operator) maoConfigFromInstallConfig() (*OperatorConfig, error) {
installConfig, err := getInstallConfig(optr.kubeClient)
if err != nil {
return nil, err
}
provider, err := getProviderFromInstallConfig(installConfig)
if err != nil {
return nil, err
}
images, err := getImagesFromJSONFile(optr.imagesFile)
if err != nil {
return nil, err
}
providerControllerImage, err := getProviderControllerFromImages(provider, *images)
if err != nil {
return nil, err
}
machineAPIOperatorImage, err := getMachineAPIOperatorFromImages(*images)
if err != nil {
return nil, err
}
return &OperatorConfig{
optr.namespace,
Controllers{
providerControllerImage,
machineAPIOperatorImage,
machineAPIOperatorImage,
},
}, nil
}