forked from kubevirt/containerized-data-importer
/
config-controller.go
375 lines (328 loc) · 10.9 KB
/
config-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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
package controller
import (
"fmt"
"time"
routev1 "github.com/openshift/api/route/v1"
routeinformers "github.com/openshift/client-go/route/informers/externalversions/route/v1"
routelisters "github.com/openshift/client-go/route/listers/route/v1"
"github.com/pkg/errors"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
extensioninformers "k8s.io/client-go/informers/extensions/v1beta1"
"k8s.io/client-go/kubernetes"
extensionlisters "k8s.io/client-go/listers/extensions/v1beta1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog"
cdiv1 "kubevirt.io/containerized-data-importer/pkg/apis/core/v1alpha1"
cdiclientset "kubevirt.io/containerized-data-importer/pkg/client/clientset/versioned"
informers "kubevirt.io/containerized-data-importer/pkg/client/informers/externalversions/core/v1alpha1"
listers "kubevirt.io/containerized-data-importer/pkg/client/listers/core/v1alpha1"
)
// ConfigController members
type ConfigController struct {
client kubernetes.Interface
cdiClientSet cdiclientset.Interface
queue workqueue.RateLimitingInterface
ingressInformer, routeInformer, configInformer cache.SharedIndexInformer
ingressLister extensionlisters.IngressLister
routeLister routelisters.RouteLister
configLister listers.CDIConfigLister
ingressesSynced cache.InformerSynced
routesSynced cache.InformerSynced
configsSynced cache.InformerSynced
pullPolicy string // Options: IfNotPresent, Always, or Never
verbose string // verbose levels: 1, 2, ...
uploadProxyServiceName string
configName string
}
//NewConfigController creates a new ConfigController
func NewConfigController(client kubernetes.Interface,
cdiClientSet cdiclientset.Interface,
ingressInformer extensioninformers.IngressInformer,
routeInformer routeinformers.RouteInformer,
configInformer informers.CDIConfigInformer,
uploadProxyServiceName string,
configName string,
pullPolicy string,
verbose string) *ConfigController {
c := &ConfigController{
client: client,
cdiClientSet: cdiClientSet,
queue: workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
ingressInformer: ingressInformer.Informer(),
routeInformer: routeInformer.Informer(),
configInformer: configInformer.Informer(),
ingressLister: ingressInformer.Lister(),
routeLister: routeInformer.Lister(),
configLister: configInformer.Lister(),
ingressesSynced: ingressInformer.Informer().HasSynced,
routesSynced: routeInformer.Informer().HasSynced,
configsSynced: configInformer.Informer().HasSynced,
uploadProxyServiceName: uploadProxyServiceName,
configName: configName,
pullPolicy: pullPolicy,
verbose: verbose,
}
// Bind the ingress SharedIndexInformer to the ingress queue
c.ingressInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: c.handleObject,
UpdateFunc: func(old, new interface{}) {
newDepl := new.(*extensionsv1beta1.Ingress)
oldDepl := old.(*extensionsv1beta1.Ingress)
if newDepl.ResourceVersion == oldDepl.ResourceVersion {
// Periodic resync will send update events for all known ingresses.
return
}
c.handleObject(new)
},
DeleteFunc: c.handleObject,
})
// Bind the route SharedIndexInformer to the route queue
c.routeInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: c.handleObject,
UpdateFunc: func(old, new interface{}) {
newDepl := new.(*routev1.Route)
oldDepl := old.(*routev1.Route)
if newDepl.ResourceVersion == oldDepl.ResourceVersion {
// Periodic resync will send update events for all known routes.
return
}
c.handleObject(new)
},
DeleteFunc: c.handleObject,
})
// Bind the CDIconfig SharedIndexInformer to the CDIconfig queue
c.configInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: c.handleObject,
UpdateFunc: func(old, new interface{}) {
newDepl := new.(*cdiv1.CDIConfig)
oldDepl := old.(*cdiv1.CDIConfig)
if newDepl.ResourceVersion == oldDepl.ResourceVersion {
// Periodic resync will send update events for all known CDIconfigs.
return
}
c.handleObject(new)
},
DeleteFunc: c.handleObject,
})
return c
}
func (c *ConfigController) handleObject(obj interface{}) {
var object metav1.Object
var ok bool
if object, ok = obj.(metav1.Object); !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
runtime.HandleError(errors.Errorf("error decoding object, invalid type"))
return
}
object, ok = tombstone.Obj.(metav1.Object)
if !ok {
runtime.HandleError(errors.Errorf("error decoding object tombstone, invalid type"))
return
}
klog.V(3).Infof("Recovered deleted object '%s' from tombstone", object.GetName())
}
klog.V(3).Infof("Processing object: %s", object.GetName())
var config *cdiv1.CDIConfig
config, err := c.configLister.Get(c.configName)
if err != nil {
runtime.HandleError(errors.Errorf("error getting CDI config: %s", err))
return
}
if ing, ok := obj.(*extensionsv1beta1.Ingress); ok {
for _, rule := range ing.Spec.Rules {
for _, path := range rule.HTTP.Paths {
if path.Backend.ServiceName == c.uploadProxyServiceName {
c.enqueueCDIConfig(config)
return
}
}
}
}
if route, ok := obj.(*routev1.Route); ok {
if route.Spec.To.Name == c.uploadProxyServiceName {
c.enqueueCDIConfig(config)
return
}
}
if conf, ok := obj.(*cdiv1.CDIConfig); ok {
if conf.Name == config.Name {
c.enqueueCDIConfig(conf)
return
}
}
return
}
func (c *ConfigController) runWorker() {
for c.processNextWorkItem() {
}
}
func (c *ConfigController) processNextWorkItem() bool {
obj, shutdown := c.queue.Get()
if shutdown {
return false
}
err := func(obj interface{}) error {
defer c.queue.Done(obj)
var key string
var ok bool
if key, ok = obj.(string); !ok {
c.queue.Forget(obj)
runtime.HandleError(errors.Errorf("expected string in workqueue but got %#v", obj))
return nil
}
if err := c.syncHandler(key); err != nil {
return errors.Errorf("error syncing '%s': %s", key, err.Error())
}
c.queue.Forget(obj)
klog.Infof("Successfully synced '%s'", key)
return nil
}(obj)
if err != nil {
runtime.HandleError(err)
return true
}
return true
}
func (c *ConfigController) syncHandler(key string) error {
var updateConfig bool
_, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
runtime.HandleError(errors.Errorf("invalid resource key: %s", key))
return nil
}
config, err := c.configLister.Get(name)
if err != nil {
runtime.HandleError(errors.Errorf("CDIConfig '%s' in work queue no longer exists", key))
return nil
}
var url string
if config.Spec.UploadProxyURLOverride != nil {
url = *config.Spec.UploadProxyURLOverride
} else {
routes, err := c.routeLister.List(labels.NewSelector())
if err != nil {
return err
}
for _, route := range routes {
url = getURLFromRoute(route, c.uploadProxyServiceName)
if url != "" {
break
}
}
if url == "" {
ingresses, err := c.ingressLister.List(labels.NewSelector())
if err != nil {
return err
}
for _, ing := range ingresses {
url = getURLFromIngress(ing, c.uploadProxyServiceName)
if url != "" {
break
}
}
}
}
if (config.Status.UploadProxyURL != nil && url == *config.Status.UploadProxyURL) || (config.Status.UploadProxyURL == nil && url == "") {
updateConfig = false
} else {
updateConfig = true
}
newConfig := config.DeepCopy()
if updateConfig {
// mutate newConfig
if url == "" {
newConfig.Status.UploadProxyURL = nil
} else {
newConfig.Status.UploadProxyURL = &url
}
}
storageClass, err := c.scratchSpaceStorageClassStatus(config)
if err != nil {
return fmt.Errorf("Error updating CDI Config: %v", err)
}
if storageClass == config.Status.ScratchSpaceStorageClass {
updateConfig = updateConfig || false
} else {
newConfig.Status.ScratchSpaceStorageClass = storageClass
updateConfig = true
}
if updateConfig {
err = updateCDIConfig(c.cdiClientSet, newConfig)
if err != nil {
return fmt.Errorf("Error updating CDI Config %s: %s", key, err)
}
}
return nil
}
func (c *ConfigController) scratchSpaceStorageClassStatus(config *cdiv1.CDIConfig) (string, error) {
storageClassList, err := c.client.StorageV1().StorageClasses().List(metav1.ListOptions{})
if err != nil {
klog.Warningf("Unable to find storage classes, %v\n", err)
}
// Check config for scratch space class
if config.Spec.ScratchSpaceStorageClass != nil {
for _, storageClass := range storageClassList.Items {
if storageClass.Name == *config.Spec.ScratchSpaceStorageClass {
return storageClass.Name, nil
}
}
}
// Check for default storage class.
for _, storageClass := range storageClassList.Items {
if defaultClassValue, ok := storageClass.Annotations[AnnDefaultStorageClass]; ok {
if defaultClassValue == "true" {
return storageClass.Name, nil
}
}
}
return "", nil
}
// Init is meant to be called synchroniously when the the controller is starting
func (c *ConfigController) Init() error {
klog.V(3).Infoln("Creating CDI config if necessary")
if err := EnsureCDIConfigExists(c.client, c.cdiClientSet, c.configName); err != nil {
runtime.HandleError(err)
return errors.Wrap(err, "Error creating CDI config")
}
return nil
}
// Run sets up ConfigController state and executes main event loop
func (c *ConfigController) Run(threadiness int, stopCh <-chan struct{}) error {
defer func() {
c.queue.ShutDown()
}()
klog.V(3).Infoln("Starting config controller Run loop")
if threadiness < 1 {
return errors.Errorf("expected >0 threads, got %d", threadiness)
}
informersNeedingSync := []cache.InformerSynced{c.ingressesSynced}
if isOpenshift := IsOpenshift(c.client); isOpenshift {
informersNeedingSync = append(informersNeedingSync, c.routesSynced)
}
if ok := cache.WaitForCacheSync(stopCh, informersNeedingSync...); !ok {
return errors.New("failed to wait for caches to sync")
}
klog.V(3).Infoln("ConfigController cache has synced")
for i := 0; i < threadiness; i++ {
go wait.Until(c.runWorker, time.Second, stopCh)
}
klog.Info("Started workers")
<-stopCh
klog.Info("Shutting down workers")
return nil
}
func (c *ConfigController) enqueueCDIConfig(obj interface{}) {
var key string
var err error
if key, err = cache.MetaNamespaceKeyFunc(obj); err != nil {
runtime.HandleError(err)
return
}
c.queue.AddRateLimited(key)
}