-
Notifications
You must be signed in to change notification settings - Fork 212
/
server.go
313 lines (272 loc) · 9.81 KB
/
server.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
// Copyright 2021 The Kubeflow 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 app
import (
"context"
"fmt"
"net/http"
"os"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/uuid"
kubeapiserver "k8s.io/apiserver/pkg/server"
"k8s.io/apiserver/pkg/server/healthz"
kubeinformers "k8s.io/client-go/informers"
kubeclientset "k8s.io/client-go/kubernetes"
clientgokubescheme "k8s.io/client-go/kubernetes/scheme"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
restclientset "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
election "k8s.io/client-go/tools/leaderelection"
"k8s.io/client-go/tools/leaderelection/resourcelock"
"k8s.io/client-go/tools/record"
"k8s.io/klog"
schedclientset "sigs.k8s.io/scheduler-plugins/pkg/generated/clientset/versioned"
volcanoclient "volcano.sh/apis/pkg/client/clientset/versioned"
"github.com/kubeflow/mpi-operator/cmd/mpi-operator/app/options"
mpijobclientset "github.com/kubeflow/mpi-operator/pkg/client/clientset/versioned"
kubeflowscheme "github.com/kubeflow/mpi-operator/pkg/client/clientset/versioned/scheme"
informers "github.com/kubeflow/mpi-operator/pkg/client/informers/externalversions"
controllersv1 "github.com/kubeflow/mpi-operator/pkg/controller"
"github.com/kubeflow/mpi-operator/pkg/version"
)
const (
apiVersion = "v2"
RecommendedKubeConfigPathEnv = "KUBECONFIG"
controllerName = "mpi-operator"
)
var (
// leader election config
leaseDuration = 15 * time.Second
renewDuration = 5 * time.Second
retryPeriod = 3 * time.Second
// leader election health check
healthCheckPort = 8080
// This is the timeout that determines the time beyond the lease expiry to be
// allowed for timeout. Checks within the timeout period after the lease
// expires will still return healthy.
leaderHealthzAdaptorTimeout = time.Second * 20
)
var (
isLeader = promauto.NewGauge(prometheus.GaugeOpts{
Name: "mpi_operator_is_leader",
Help: "Is this client the leader of this mpi-operator client set?",
})
)
func Run(opt *options.ServerOption) error {
// Check if the -version flag was passed and, if so, print the version and exit.
if opt.PrintVersion {
version.PrintVersionAndExit(apiVersion)
}
namespace := opt.Namespace
if namespace == corev1.NamespaceAll {
klog.Info("Using cluster scoped operator")
} else {
klog.Infof("Scoping operator to namespace %s", namespace)
}
// To help debugging, immediately log version.
klog.Infof("%+v", version.Info(apiVersion))
// To help debugging, immediately log opts.
klog.Infof("Server options: %+v", opt)
// set up signals so we handle the first shutdown signal gracefully
stopCh := kubeapiserver.SetupSignalHandler()
// Note: ENV KUBECONFIG will overwrite user defined Kubeconfig option.
if len(os.Getenv(RecommendedKubeConfigPathEnv)) > 0 {
// use the current context in kubeconfig
// This is very useful for running locally.
opt.Kubeconfig = os.Getenv(RecommendedKubeConfigPathEnv)
}
cfg, err := clientcmd.BuildConfigFromFlags(opt.MasterURL, opt.Kubeconfig)
if err != nil {
klog.Fatalf("Error building kubeConfig: %s", err.Error())
}
cfg.QPS = float32(opt.QPS)
cfg.Burst = opt.Burst
// Create clients.
kubeClient, leaderElectionClientSet, mpiJobClientSet, volcanoClientSet, schedClientSet, err := createClientSets(cfg, opt.GangSchedulingName)
if err != nil {
return err
}
if !checkCRDExists(mpiJobClientSet, namespace) {
klog.Info("CRD doesn't exist. Exiting")
os.Exit(1)
}
// Add mpi-job-controller types to the default Kubernetes Scheme so Events
// can be logged for mpi-job-controller types.
err = kubeflowscheme.AddToScheme(clientgokubescheme.Scheme)
if err != nil {
return fmt.Errorf("CoreV1 Add Scheme failed: %v", err)
}
// Set leader election start function.
run := func(ctx context.Context) {
var kubeInformerFactoryOpts []kubeinformers.SharedInformerOption
var kubeflowInformerFactoryOpts []informers.SharedInformerOption
if namespace != metav1.NamespaceAll {
kubeInformerFactoryOpts = append(kubeInformerFactoryOpts, kubeinformers.WithNamespace(namespace))
kubeflowInformerFactoryOpts = append(kubeflowInformerFactoryOpts, informers.WithNamespace(namespace))
}
kubeInformerFactory := kubeinformers.NewSharedInformerFactoryWithOptions(kubeClient, 0, kubeInformerFactoryOpts...)
kubeflowInformerFactory := informers.NewSharedInformerFactoryWithOptions(mpiJobClientSet, 0, kubeflowInformerFactoryOpts...)
controller, err := controllersv1.NewMPIJobController(
kubeClient,
mpiJobClientSet,
volcanoClientSet,
schedClientSet,
kubeInformerFactory.Core().V1().ConfigMaps(),
kubeInformerFactory.Core().V1().Secrets(),
kubeInformerFactory.Core().V1().Services(),
kubeInformerFactory.Batch().V1().Jobs(),
kubeInformerFactory.Core().V1().Pods(),
kubeInformerFactory.Scheduling().V1().PriorityClasses(),
kubeflowInformerFactory.Kubeflow().V2beta1().MPIJobs(),
namespace, opt.GangSchedulingName)
if err != nil {
klog.Fatalf("Failed to setup the controller")
}
go kubeInformerFactory.Start(ctx.Done())
go kubeflowInformerFactory.Start(ctx.Done())
if controller.PodGroupCtrl != nil {
controller.PodGroupCtrl.StartInformerFactory(ctx.Done())
}
// Set leader election start function.
isLeader.Set(1)
if err = controller.Run(opt.Threadiness, stopCh); err != nil {
klog.Fatalf("Error running controller: %s", err.Error())
}
}
id, err := os.Hostname()
if err != nil {
return fmt.Errorf("failed to get hostname: %v", err)
}
// add a uniquifier so that two processes on the same host don't accidentally both become active
id = id + "_" + string(uuid.NewUUID())
// Prepare event clients.
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(klog.Infof)
eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: kubeClient.CoreV1().Events("")})
recorder := eventBroadcaster.NewRecorder(clientgokubescheme.Scheme, corev1.EventSource{Component: controllerName})
var electionChecker = election.NewLeaderHealthzAdaptor(leaderHealthzAdaptorTimeout)
mux := http.NewServeMux()
healthz.InstallPathHandler(mux, "/healthz", electionChecker)
server := &http.Server{
Addr: fmt.Sprintf(":%d", healthCheckPort),
Handler: mux,
}
go func() {
klog.Infof("Start listening to %d for health check", healthCheckPort)
if err := server.ListenAndServe(); err != nil {
klog.Fatalf("Error starting server for health check: %v", err)
}
}()
rl := &resourcelock.LeaseLock{
LeaseMeta: metav1.ObjectMeta{
Namespace: opt.LockNamespace,
Name: controllerName,
},
Client: leaderElectionClientSet.CoordinationV1(),
LockConfig: resourcelock.ResourceLockConfig{
Identity: id,
EventRecorder: recorder,
},
}
ctx, cancel := context.WithCancel(context.TODO())
defer cancel()
go func() {
select {
case <-stopCh:
cancel()
case <-ctx.Done():
}
}()
// Start leader election.
election.RunOrDie(ctx, election.LeaderElectionConfig{
Lock: rl,
LeaseDuration: leaseDuration,
RenewDeadline: renewDuration,
RetryPeriod: retryPeriod,
Callbacks: election.LeaderCallbacks{
OnStartedLeading: func(ctx context.Context) {
klog.Infof("Leading started")
run(ctx)
},
OnStoppedLeading: func() {
isLeader.Set(0)
klog.Fatalf("Leader election stopped")
},
OnNewLeader: func(identity string) {
if identity == id {
return
}
klog.Infof("New leader has been elected: %s", identity)
},
},
Name: "mpi-operator",
WatchDog: electionChecker,
})
return fmt.Errorf("finished without leader elect")
}
func createClientSets(
config *restclientset.Config,
gangSchedulingName string,
) (
kubeclientset.Interface,
kubeclientset.Interface,
mpijobclientset.Interface,
volcanoclient.Interface,
schedclientset.Interface,
error,
) {
kubeClientSet, err := kubeclientset.NewForConfig(restclientset.AddUserAgent(config, "mpi-operator"))
if err != nil {
return nil, nil, nil, nil, nil, err
}
leaderElectionClientSet, err := kubeclientset.NewForConfig(restclientset.AddUserAgent(config, "leader-election"))
if err != nil {
return nil, nil, nil, nil, nil, err
}
mpiJobClientSet, err := mpijobclientset.NewForConfig(config)
if err != nil {
return nil, nil, nil, nil, nil, err
}
var (
volcanoClientSet volcanoclient.Interface
schedClientSet schedclientset.Interface
)
if gangSchedulingName == options.GangSchedulerVolcano {
if volcanoClientSet, err = volcanoclient.NewForConfig(restclientset.AddUserAgent(config, "volcano")); err != nil {
return nil, nil, nil, nil, nil, err
}
} else if len(gangSchedulingName) != 0 {
if schedClientSet, err = schedclientset.NewForConfig(restclientset.AddUserAgent(config, "scheduler-plugins")); err != nil {
return nil, nil, nil, nil, nil, err
}
}
return kubeClientSet, leaderElectionClientSet, mpiJobClientSet, volcanoClientSet, schedClientSet, nil
}
func checkCRDExists(clientset mpijobclientset.Interface, namespace string) bool {
_, err := clientset.KubeflowV2beta1().MPIJobs(namespace).List(context.TODO(), metav1.ListOptions{})
if err != nil {
klog.Error(err)
if _, ok := err.(*errors.StatusError); ok {
if errors.IsNotFound(err) {
return false
}
}
}
return true
}