forked from kubevirt/kubevirt
-
Notifications
You must be signed in to change notification settings - Fork 2
/
application.go
252 lines (199 loc) · 8 KB
/
application.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
package watch
import (
golog "log"
"net/http"
"os"
"github.com/emicklei/go-restful"
flag "github.com/spf13/pflag"
k8sv1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes/scheme"
k8coresv1 "k8s.io/client-go/kubernetes/typed/core/v1"
clientrest "k8s.io/client-go/rest"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/leaderelection"
"k8s.io/client-go/tools/leaderelection/resourcelock"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"kubevirt.io/kubevirt/pkg/controller"
"kubevirt.io/kubevirt/pkg/kubecli"
"kubevirt.io/kubevirt/pkg/log"
"kubevirt.io/kubevirt/pkg/registry-disk"
"kubevirt.io/kubevirt/pkg/service"
"kubevirt.io/kubevirt/pkg/virt-controller/leaderelectionconfig"
"kubevirt.io/kubevirt/pkg/virt-controller/rest"
"kubevirt.io/kubevirt/pkg/virt-controller/services"
)
const (
defaultPort = 8182
defaultHost = "0.0.0.0"
launcherImage = "virt-launcher"
migratorImage = "virt-handler"
virtShareDir = "/var/run/kubevirt"
ephemeralDiskDir = "/var/run/libvirt/kubevirt-ephemeral-disk"
)
type VirtControllerApp struct {
service.ServiceListen
clientSet kubecli.KubevirtClient
templateService services.TemplateService
restClient *clientrest.RESTClient
vmService services.VMService
informerFactory controller.KubeInformerFactory
podInformer cache.SharedIndexInformer
migrationCache cache.Store
migrationController *MigrationController
migrationInformer cache.SharedIndexInformer
migrationQueue workqueue.RateLimitingInterface
migrationRecorder record.EventRecorder
vmCache cache.Store
vmController *VMController
vmInformer cache.SharedIndexInformer
vmQueue workqueue.RateLimitingInterface
rsController *VMReplicaSet
rsInformer cache.SharedIndexInformer
LeaderElection leaderelectionconfig.Configuration
launcherImage string
migratorImage string
virtShareDir string
ephemeralDiskDir string
readyChan chan bool
}
var _ service.Service = &VirtControllerApp{}
func Execute() {
var err error
var app VirtControllerApp = VirtControllerApp{}
app.LeaderElection = leaderelectionconfig.DefaultLeaderElectionConfiguration()
service.Setup(&app)
app.readyChan = make(chan bool, 1)
log.InitializeLogging("virt-controller")
app.clientSet, err = kubecli.GetKubevirtClient()
if err != nil {
golog.Fatal(err)
}
app.restClient = app.clientSet.RestClient()
webService := rest.WebService
webService.Route(webService.GET("/leader").To(app.readinessProbe).Doc("Leader endpoint"))
restful.Add(webService)
// Bootstrapping. From here on the initialization order is important
app.informerFactory = controller.NewKubeInformerFactory(app.restClient, app.clientSet)
app.vmInformer = app.informerFactory.VM()
app.migrationInformer = app.informerFactory.Migration()
app.podInformer = app.informerFactory.KubeVirtPod()
app.vmQueue = workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter())
app.vmCache = app.vmInformer.GetStore()
app.vmInformer.AddEventHandler(controller.NewResourceEventHandlerFuncsForWorkqueue(app.vmQueue))
app.podInformer.AddEventHandler(controller.NewResourceEventHandlerFuncsForFunc(vmLabelHandler(app.vmQueue)))
app.migrationQueue = workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter())
app.migrationInformer.AddEventHandler(controller.NewResourceEventHandlerFuncsForWorkqueue(app.migrationQueue))
app.podInformer.AddEventHandler(controller.NewResourceEventHandlerFuncsForFunc(migrationJobLabelHandler(app.migrationQueue)))
app.podInformer.AddEventHandler(controller.NewResourceEventHandlerFuncsForFunc(migrationPodLabelHandler(app.migrationQueue)))
app.migrationCache = app.migrationInformer.GetStore()
app.migrationRecorder = app.getNewRecorder(k8sv1.NamespaceAll, "virt-migration-controller")
app.rsInformer = app.informerFactory.VMReplicaSet()
app.initCommon()
app.initReplicaSet()
app.Run()
}
func (vca *VirtControllerApp) Run() {
logger := log.Log
stop := make(chan struct{})
defer close(stop)
go func() {
httpLogger := logger.With("service", "http")
httpLogger.Level(log.INFO).Log("action", "listening", "interface", vca.BindAddress, "port", vca.Port)
if err := http.ListenAndServe(vca.Address(), nil); err != nil {
golog.Fatal(err)
}
}()
recorder := vca.getNewRecorder(k8sv1.NamespaceAll, leaderelectionconfig.DefaultEndpointName)
id, err := os.Hostname()
if err != nil {
golog.Fatalf("unable to get hostname: %v", err)
}
rl, err := resourcelock.New(vca.LeaderElection.ResourceLock,
leaderelectionconfig.DefaultNamespace,
leaderelectionconfig.DefaultEndpointName,
vca.clientSet.CoreV1(),
resourcelock.ResourceLockConfig{
Identity: id,
EventRecorder: recorder,
})
if err != nil {
golog.Fatal(err)
}
leaderElector, err := leaderelection.NewLeaderElector(
leaderelection.LeaderElectionConfig{
Lock: rl,
LeaseDuration: vca.LeaderElection.LeaseDuration.Duration,
RenewDeadline: vca.LeaderElection.RenewDeadline.Duration,
RetryPeriod: vca.LeaderElection.RetryPeriod.Duration,
Callbacks: leaderelection.LeaderCallbacks{
OnStartedLeading: func(stopCh <-chan struct{}) {
vca.informerFactory.Start(stop)
go vca.vmController.Run(3, stop)
go vca.migrationController.Run(3, stop)
go vca.rsController.Run(3, stop)
close(vca.readyChan)
},
OnStoppedLeading: func() {
golog.Fatal("leaderelection lost")
},
},
})
if err != nil {
golog.Fatal(err)
}
leaderElector.Run()
panic("unreachable")
}
func (vca *VirtControllerApp) getNewRecorder(namespace string, componentName string) record.EventRecorder {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartRecordingToSink(&k8coresv1.EventSinkImpl{Interface: vca.clientSet.CoreV1().Events(namespace)})
return eventBroadcaster.NewRecorder(scheme.Scheme, k8sv1.EventSource{Component: componentName})
}
func (vca *VirtControllerApp) initCommon() {
var err error
err = registrydisk.SetLocalDirectory(vca.ephemeralDiskDir + "/registry-disk-data")
if err != nil {
golog.Fatal(err)
}
vca.templateService, err = services.NewTemplateService(vca.launcherImage, vca.migratorImage, vca.virtShareDir)
if err != nil {
golog.Fatal(err)
}
vca.vmService = services.NewVMService(vca.clientSet, vca.restClient, vca.templateService)
vca.vmController = NewVMController(vca.restClient, vca.vmService, vca.vmQueue, vca.vmCache, vca.vmInformer, vca.podInformer, nil, vca.clientSet)
vca.migrationController = NewMigrationController(vca.restClient, vca.vmService, vca.clientSet, vca.migrationQueue, vca.migrationInformer, vca.podInformer, vca.migrationCache, vca.migrationRecorder)
}
func (vca *VirtControllerApp) initReplicaSet() {
recorder := vca.getNewRecorder(k8sv1.NamespaceAll, "virtualmachinereplicaset-controller")
vca.rsController = NewVMReplicaSet(vca.vmInformer, vca.rsInformer, recorder, vca.clientSet, controller.BurstReplicas)
}
func (vca *VirtControllerApp) readinessProbe(_ *restful.Request, response *restful.Response) {
res := map[string]interface{}{}
select {
case _, opened := <-vca.readyChan:
if !opened {
res["apiserver"] = map[string]interface{}{"leader": "true"}
response.WriteHeaderAndJson(http.StatusOK, res, restful.MIME_JSON)
return
}
default:
}
res["apiserver"] = map[string]interface{}{"leader": "false", "error": "current pod is not leader"}
response.WriteHeaderAndJson(http.StatusServiceUnavailable, res, restful.MIME_JSON)
}
func (vca *VirtControllerApp) AddFlags() {
vca.InitFlags()
leaderelectionconfig.BindFlags(&vca.LeaderElection)
vca.BindAddress = defaultHost
vca.Port = defaultPort
vca.AddCommonFlags()
flag.StringVar(&vca.launcherImage, "launcher-image", launcherImage,
"Shim container for containerized VMs")
flag.StringVar(&vca.migratorImage, "migrator-image", migratorImage,
"Container which orchestrates a VM migration")
flag.StringVar(&vca.virtShareDir, "kubevirt-share-dir", virtShareDir,
"Shared directory between virt-handler and virt-launcher")
flag.StringVar(&vca.ephemeralDiskDir, "ephemeral-disk-dir", ephemeralDiskDir,
"Base directory for ephemeral disk data")
}