forked from k3s-io/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
master.go
1206 lines (1069 loc) · 43.2 KB
/
master.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
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
Copyright 2014 The Kubernetes Authors All rights reserved.
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 master
import (
"fmt"
"io/ioutil"
"math/rand"
"net"
"net/http"
"net/http/pprof"
"net/url"
"os"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"k8s.io/kubernetes/pkg/admission"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/latest"
"k8s.io/kubernetes/pkg/api/meta"
"k8s.io/kubernetes/pkg/api/rest"
"k8s.io/kubernetes/pkg/api/v1"
expapi "k8s.io/kubernetes/pkg/apis/experimental"
"k8s.io/kubernetes/pkg/apiserver"
"k8s.io/kubernetes/pkg/auth/authenticator"
"k8s.io/kubernetes/pkg/auth/authorizer"
"k8s.io/kubernetes/pkg/auth/handlers"
client "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/fields"
"k8s.io/kubernetes/pkg/healthz"
"k8s.io/kubernetes/pkg/labels"
"k8s.io/kubernetes/pkg/master/ports"
"k8s.io/kubernetes/pkg/registry/componentstatus"
controlleretcd "k8s.io/kubernetes/pkg/registry/controller/etcd"
deploymentetcd "k8s.io/kubernetes/pkg/registry/deployment/etcd"
"k8s.io/kubernetes/pkg/registry/endpoint"
endpointsetcd "k8s.io/kubernetes/pkg/registry/endpoint/etcd"
eventetcd "k8s.io/kubernetes/pkg/registry/event/etcd"
expcontrolleretcd "k8s.io/kubernetes/pkg/registry/experimental/controller/etcd"
jobetcd "k8s.io/kubernetes/pkg/registry/job/etcd"
limitrangeetcd "k8s.io/kubernetes/pkg/registry/limitrange/etcd"
"k8s.io/kubernetes/pkg/registry/namespace"
namespaceetcd "k8s.io/kubernetes/pkg/registry/namespace/etcd"
"k8s.io/kubernetes/pkg/registry/node"
nodeetcd "k8s.io/kubernetes/pkg/registry/node/etcd"
pvetcd "k8s.io/kubernetes/pkg/registry/persistentvolume/etcd"
pvcetcd "k8s.io/kubernetes/pkg/registry/persistentvolumeclaim/etcd"
podetcd "k8s.io/kubernetes/pkg/registry/pod/etcd"
podtemplateetcd "k8s.io/kubernetes/pkg/registry/podtemplate/etcd"
resourcequotaetcd "k8s.io/kubernetes/pkg/registry/resourcequota/etcd"
secretetcd "k8s.io/kubernetes/pkg/registry/secret/etcd"
"k8s.io/kubernetes/pkg/registry/service"
etcdallocator "k8s.io/kubernetes/pkg/registry/service/allocator/etcd"
serviceetcd "k8s.io/kubernetes/pkg/registry/service/etcd"
ipallocator "k8s.io/kubernetes/pkg/registry/service/ipallocator"
serviceaccountetcd "k8s.io/kubernetes/pkg/registry/serviceaccount/etcd"
thirdpartyresourceetcd "k8s.io/kubernetes/pkg/registry/thirdpartyresource/etcd"
"k8s.io/kubernetes/pkg/registry/thirdpartyresourcedata"
thirdpartyresourcedataetcd "k8s.io/kubernetes/pkg/registry/thirdpartyresourcedata/etcd"
"k8s.io/kubernetes/pkg/storage"
etcdstorage "k8s.io/kubernetes/pkg/storage/etcd"
"k8s.io/kubernetes/pkg/tools"
"k8s.io/kubernetes/pkg/ui"
"k8s.io/kubernetes/pkg/util"
"k8s.io/kubernetes/pkg/util/sets"
daemonetcd "k8s.io/kubernetes/pkg/registry/daemonset/etcd"
horizontalpodautoscaleretcd "k8s.io/kubernetes/pkg/registry/horizontalpodautoscaler/etcd"
"github.com/emicklei/go-restful"
"github.com/emicklei/go-restful/swagger"
"github.com/golang/glog"
"github.com/prometheus/client_golang/prometheus"
"k8s.io/kubernetes/pkg/registry/service/allocator"
"k8s.io/kubernetes/pkg/registry/service/portallocator"
)
const (
DefaultEtcdPathPrefix = "/registry"
)
// Config is a structure used to configure a Master.
type Config struct {
DatabaseStorage storage.Interface
ExpDatabaseStorage storage.Interface
// StorageVersions is a map between groups and their storage versions
StorageVersions map[string]string
EventTTL time.Duration
NodeRegexp string
KubeletClient client.KubeletClient
// allow downstream consumers to disable the core controller loops
EnableCoreControllers bool
EnableLogsSupport bool
EnableUISupport bool
// allow downstream consumers to disable swagger
EnableSwaggerSupport bool
// allow api versions to be conditionally disabled
DisableV1 bool
EnableExp bool
// allow downstream consumers to disable the index route
EnableIndex bool
EnableProfiling bool
EnableWatchCache bool
APIPrefix string
APIGroupPrefix string
CorsAllowedOriginList []string
Authenticator authenticator.Request
// TODO(roberthbailey): Remove once the server no longer supports http basic auth.
SupportsBasicAuth bool
Authorizer authorizer.Authorizer
AdmissionControl admission.Interface
MasterServiceNamespace string
// Map requests to contexts. Exported so downstream consumers can provider their own mappers
RequestContextMapper api.RequestContextMapper
// If specified, all web services will be registered into this container
RestfulContainer *restful.Container
// If specified, requests will be allocated a random timeout between this value, and twice this value.
// Note that it is up to the request handlers to ignore or honor this timeout. In seconds.
MinRequestTimeout int
// Number of masters running; all masters must be started with the
// same value for this field. (Numbers > 1 currently untested.)
MasterCount int
// The port on PublicAddress where a read-write server will be installed.
// Defaults to 6443 if not set.
ReadWritePort int
// ExternalHost is the host name to use for external (public internet) facing URLs (e.g. Swagger)
ExternalHost string
// PublicAddress is the IP address where members of the cluster (kubelet,
// kube-proxy, services, etc.) can reach the master.
// If nil or 0.0.0.0, the host's default interface will be used.
PublicAddress net.IP
// Control the interval that pod, node IP, and node heath status caches
// expire.
CacheTimeout time.Duration
// The name of the cluster.
ClusterName string
// The range of IPs to be assigned to services with type=ClusterIP or greater
ServiceClusterIPRange *net.IPNet
// The IP address for the master service (must be inside ServiceClusterIPRange
ServiceReadWriteIP net.IP
// The range of ports to be assigned to services with type=NodePort or greater
ServiceNodePortRange util.PortRange
// Used for secure proxy. If empty, don't use secure proxy.
SSHUser string
SSHKeyfile string
InstallSSHKey InstallSSHKey
}
type InstallSSHKey func(user string, data []byte) error
// Master contains state for a Kubernetes cluster master/api server.
type Master struct {
// "Inputs", Copied from Config
serviceClusterIPRange *net.IPNet
serviceNodePortRange util.PortRange
cacheTimeout time.Duration
minRequestTimeout time.Duration
mux apiserver.Mux
muxHelper *apiserver.MuxHelper
handlerContainer *restful.Container
rootWebService *restful.WebService
enableCoreControllers bool
enableLogsSupport bool
enableUISupport bool
enableSwaggerSupport bool
enableProfiling bool
enableWatchCache bool
apiPrefix string
apiGroupPrefix string
corsAllowedOriginList []string
authenticator authenticator.Request
authorizer authorizer.Authorizer
admissionControl admission.Interface
masterCount int
v1 bool
exp bool
requestContextMapper api.RequestContextMapper
// External host is the name that should be used in external (public internet) URLs for this master
externalHost string
// clusterIP is the IP address of the master within the cluster.
clusterIP net.IP
publicReadWritePort int
serviceReadWriteIP net.IP
serviceReadWritePort int
masterServices *util.Runner
// storage contains the RESTful endpoints exposed by this master
storage map[string]rest.Storage
// registries are internal client APIs for accessing the storage layer
// TODO: define the internal typed interface in a way that clients can
// also be replaced
nodeRegistry node.Registry
namespaceRegistry namespace.Registry
serviceRegistry service.Registry
endpointRegistry endpoint.Registry
serviceClusterIPAllocator service.RangeRegistry
serviceNodePortAllocator service.RangeRegistry
// "Outputs"
Handler http.Handler
InsecureHandler http.Handler
// Used for secure proxy
dialer apiserver.ProxyDialerFunc
tunnels *util.SSHTunnelList
tunnelsLock sync.Mutex
installSSHKey InstallSSHKey
lastSync int64 // Seconds since Epoch
lastSyncMetric prometheus.GaugeFunc
clock util.Clock
// storage for third party objects
thirdPartyStorage storage.Interface
// map from api path to storage for those objects
thirdPartyResources map[string]*thirdpartyresourcedataetcd.REST
// protects the map
thirdPartyResourcesLock sync.RWMutex
}
// NewEtcdStorage returns a storage.Interface for the provided arguments or an error if the version
// is incorrect.
func NewEtcdStorage(client tools.EtcdClient, interfacesFunc meta.VersionInterfacesFunc, version, prefix string) (etcdStorage storage.Interface, err error) {
versionInterfaces, err := interfacesFunc(version)
if err != nil {
return etcdStorage, err
}
return etcdstorage.NewEtcdStorage(client, versionInterfaces.Codec, prefix), nil
}
// setDefaults fills in any fields not set that are required to have valid data.
func setDefaults(c *Config) {
if c.ServiceClusterIPRange == nil {
defaultNet := "10.0.0.0/24"
glog.Warningf("Network range for service cluster IPs is unspecified. Defaulting to %v.", defaultNet)
_, serviceClusterIPRange, err := net.ParseCIDR(defaultNet)
if err != nil {
glog.Fatalf("Unable to parse CIDR: %v", err)
}
if size := ipallocator.RangeSize(serviceClusterIPRange); size < 8 {
glog.Fatalf("The service cluster IP range must be at least %d IP addresses", 8)
}
c.ServiceClusterIPRange = serviceClusterIPRange
}
if c.ServiceReadWriteIP == nil {
// Select the first valid IP from ServiceClusterIPRange to use as the master service IP.
serviceReadWriteIP, err := ipallocator.GetIndexedIP(c.ServiceClusterIPRange, 1)
if err != nil {
glog.Fatalf("Failed to generate service read-write IP for master service: %v", err)
}
glog.V(4).Infof("Setting master service IP to %q (read-write).", serviceReadWriteIP)
c.ServiceReadWriteIP = serviceReadWriteIP
}
if c.ServiceNodePortRange.Size == 0 {
// TODO: Currently no way to specify an empty range (do we need to allow this?)
// We should probably allow this for clouds that don't require NodePort to do load-balancing (GCE)
// but then that breaks the strict nestedness of ServiceType.
// Review post-v1
defaultServiceNodePortRange := util.PortRange{Base: 30000, Size: 2768}
c.ServiceNodePortRange = defaultServiceNodePortRange
glog.Infof("Node port range unspecified. Defaulting to %v.", c.ServiceNodePortRange)
}
if c.MasterCount == 0 {
// Clearly, there will be at least one master.
c.MasterCount = 1
}
if c.ReadWritePort == 0 {
c.ReadWritePort = 6443
}
if c.CacheTimeout == 0 {
c.CacheTimeout = 5 * time.Second
}
for c.PublicAddress == nil || c.PublicAddress.IsUnspecified() || c.PublicAddress.IsLoopback() {
// TODO: This should be done in the caller and just require a
// valid value to be passed in.
hostIP, err := util.ChooseHostInterface()
if err != nil {
glog.Fatalf("Unable to find suitable network address.error='%v' . "+
"Will try again in 5 seconds. Set the public address directly to avoid this wait.", err)
time.Sleep(5 * time.Second)
}
c.PublicAddress = hostIP
glog.Infof("Will report %v as public IP address.", c.PublicAddress)
}
if c.RequestContextMapper == nil {
c.RequestContextMapper = api.NewRequestContextMapper()
}
}
// New returns a new instance of Master from the given config.
// Certain config fields will be set to a default value if unset,
// including:
// ServiceClusterIPRange
// ServiceNodePortRange
// MasterCount
// ReadWritePort
// PublicAddress
// Certain config fields must be specified, including:
// KubeletClient
// Public fields:
// Handler -- The returned master has a field TopHandler which is an
// http.Handler which handles all the endpoints provided by the master,
// including the API, the UI, and miscellaneous debugging endpoints. All
// these are subject to authorization and authentication.
// InsecureHandler -- an http.Handler which handles all the same
// endpoints as Handler, but no authorization and authentication is done.
// Public methods:
// HandleWithAuth -- Allows caller to add an http.Handler for an endpoint
// that uses the same authentication and authorization (if any is configured)
// as the master's built-in endpoints.
// If the caller wants to add additional endpoints not using the master's
// auth, then the caller should create a handler for those endpoints, which delegates the
// any unhandled paths to "Handler".
func New(c *Config) *Master {
setDefaults(c)
if c.KubeletClient == nil {
glog.Fatalf("master.New() called with config.KubeletClient == nil")
}
m := &Master{
serviceClusterIPRange: c.ServiceClusterIPRange,
serviceNodePortRange: c.ServiceNodePortRange,
rootWebService: new(restful.WebService),
enableCoreControllers: c.EnableCoreControllers,
enableLogsSupport: c.EnableLogsSupport,
enableUISupport: c.EnableUISupport,
enableSwaggerSupport: c.EnableSwaggerSupport,
enableProfiling: c.EnableProfiling,
enableWatchCache: c.EnableWatchCache,
apiPrefix: c.APIPrefix,
apiGroupPrefix: c.APIGroupPrefix,
corsAllowedOriginList: c.CorsAllowedOriginList,
authenticator: c.Authenticator,
authorizer: c.Authorizer,
admissionControl: c.AdmissionControl,
v1: !c.DisableV1,
exp: c.EnableExp,
requestContextMapper: c.RequestContextMapper,
cacheTimeout: c.CacheTimeout,
minRequestTimeout: time.Duration(c.MinRequestTimeout) * time.Second,
masterCount: c.MasterCount,
externalHost: c.ExternalHost,
clusterIP: c.PublicAddress,
publicReadWritePort: c.ReadWritePort,
serviceReadWriteIP: c.ServiceReadWriteIP,
// TODO: serviceReadWritePort should be passed in as an argument, it may not always be 443
serviceReadWritePort: 443,
installSSHKey: c.InstallSSHKey,
}
var handlerContainer *restful.Container
if c.RestfulContainer != nil {
m.mux = c.RestfulContainer.ServeMux
handlerContainer = c.RestfulContainer
} else {
mux := http.NewServeMux()
m.mux = mux
handlerContainer = NewHandlerContainer(mux)
}
m.handlerContainer = handlerContainer
// Use CurlyRouter to be able to use regular expressions in paths. Regular expressions are required in paths for example for proxy (where the path is proxy/{kind}/{name}/{*})
m.handlerContainer.Router(restful.CurlyRouter{})
m.muxHelper = &apiserver.MuxHelper{Mux: m.mux, RegisteredPaths: []string{}}
m.init(c)
return m
}
// HandleWithAuth adds an http.Handler for pattern to an http.ServeMux
// Applies the same authentication and authorization (if any is configured)
// to the request is used for the master's built-in endpoints.
func (m *Master) HandleWithAuth(pattern string, handler http.Handler) {
// TODO: Add a way for plugged-in endpoints to translate their
// URLs into attributes that an Authorizer can understand, and have
// sensible policy defaults for plugged-in endpoints. This will be different
// for generic endpoints versus REST object endpoints.
// TODO: convert to go-restful
m.muxHelper.Handle(pattern, handler)
}
// HandleFuncWithAuth adds an http.Handler for pattern to an http.ServeMux
// Applies the same authentication and authorization (if any is configured)
// to the request is used for the master's built-in endpoints.
func (m *Master) HandleFuncWithAuth(pattern string, handler func(http.ResponseWriter, *http.Request)) {
// TODO: convert to go-restful
m.muxHelper.HandleFunc(pattern, handler)
}
func NewHandlerContainer(mux *http.ServeMux) *restful.Container {
container := restful.NewContainer()
container.ServeMux = mux
apiserver.InstallRecoverHandler(container)
return container
}
// init initializes master.
func (m *Master) init(c *Config) {
healthzChecks := []healthz.HealthzChecker{}
m.clock = util.RealClock{}
podStorage := podetcd.NewStorage(c.DatabaseStorage, c.EnableWatchCache, c.KubeletClient)
podTemplateStorage := podtemplateetcd.NewREST(c.DatabaseStorage)
eventStorage := eventetcd.NewREST(c.DatabaseStorage, uint64(c.EventTTL.Seconds()))
limitRangeStorage := limitrangeetcd.NewREST(c.DatabaseStorage)
resourceQuotaStorage, resourceQuotaStatusStorage := resourcequotaetcd.NewREST(c.DatabaseStorage)
secretStorage := secretetcd.NewREST(c.DatabaseStorage)
serviceAccountStorage := serviceaccountetcd.NewREST(c.DatabaseStorage)
persistentVolumeStorage, persistentVolumeStatusStorage := pvetcd.NewREST(c.DatabaseStorage)
persistentVolumeClaimStorage, persistentVolumeClaimStatusStorage := pvcetcd.NewREST(c.DatabaseStorage)
namespaceStorage, namespaceStatusStorage, namespaceFinalizeStorage := namespaceetcd.NewREST(c.DatabaseStorage)
m.namespaceRegistry = namespace.NewRegistry(namespaceStorage)
endpointsStorage := endpointsetcd.NewREST(c.DatabaseStorage, c.EnableWatchCache)
m.endpointRegistry = endpoint.NewRegistry(endpointsStorage)
nodeStorage, nodeStatusStorage := nodeetcd.NewREST(c.DatabaseStorage, c.EnableWatchCache, c.KubeletClient)
m.nodeRegistry = node.NewRegistry(nodeStorage)
serviceStorage := serviceetcd.NewREST(c.DatabaseStorage)
m.serviceRegistry = service.NewRegistry(serviceStorage)
var serviceClusterIPRegistry service.RangeRegistry
serviceClusterIPAllocator := ipallocator.NewAllocatorCIDRRange(m.serviceClusterIPRange, func(max int, rangeSpec string) allocator.Interface {
mem := allocator.NewAllocationMap(max, rangeSpec)
etcd := etcdallocator.NewEtcd(mem, "/ranges/serviceips", "serviceipallocation", c.DatabaseStorage)
serviceClusterIPRegistry = etcd
return etcd
})
m.serviceClusterIPAllocator = serviceClusterIPRegistry
var serviceNodePortRegistry service.RangeRegistry
serviceNodePortAllocator := portallocator.NewPortAllocatorCustom(m.serviceNodePortRange, func(max int, rangeSpec string) allocator.Interface {
mem := allocator.NewAllocationMap(max, rangeSpec)
etcd := etcdallocator.NewEtcd(mem, "/ranges/servicenodeports", "servicenodeportallocation", c.DatabaseStorage)
serviceNodePortRegistry = etcd
return etcd
})
m.serviceNodePortAllocator = serviceNodePortRegistry
controllerStorage := controlleretcd.NewREST(c.DatabaseStorage)
// TODO: Factor out the core API registration
m.storage = map[string]rest.Storage{
"pods": podStorage.Pod,
"pods/attach": podStorage.Attach,
"pods/status": podStorage.Status,
"pods/log": podStorage.Log,
"pods/exec": podStorage.Exec,
"pods/portforward": podStorage.PortForward,
"pods/proxy": podStorage.Proxy,
"pods/binding": podStorage.Binding,
"bindings": podStorage.Binding,
"podTemplates": podTemplateStorage,
"replicationControllers": controllerStorage,
"services": service.NewStorage(m.serviceRegistry, m.endpointRegistry, serviceClusterIPAllocator, serviceNodePortAllocator),
"endpoints": endpointsStorage,
"nodes": nodeStorage,
"nodes/status": nodeStatusStorage,
"events": eventStorage,
"limitRanges": limitRangeStorage,
"resourceQuotas": resourceQuotaStorage,
"resourceQuotas/status": resourceQuotaStatusStorage,
"namespaces": namespaceStorage,
"namespaces/status": namespaceStatusStorage,
"namespaces/finalize": namespaceFinalizeStorage,
"secrets": secretStorage,
"serviceAccounts": serviceAccountStorage,
"persistentVolumes": persistentVolumeStorage,
"persistentVolumes/status": persistentVolumeStatusStorage,
"persistentVolumeClaims": persistentVolumeClaimStorage,
"persistentVolumeClaims/status": persistentVolumeClaimStatusStorage,
"componentStatuses": componentstatus.NewStorage(func() map[string]apiserver.Server { return m.getServersToValidate(c) }),
}
// establish the node proxy dialer
if len(c.SSHUser) > 0 {
// Usernames are capped @ 32
if len(c.SSHUser) > 32 {
glog.Warning("SSH User is too long, truncating to 32 chars")
c.SSHUser = c.SSHUser[0:32]
}
glog.Infof("Setting up proxy: %s %s", c.SSHUser, c.SSHKeyfile)
// public keyfile is written last, so check for that.
publicKeyFile := c.SSHKeyfile + ".pub"
exists, err := util.FileExists(publicKeyFile)
if err != nil {
glog.Errorf("Error detecting if key exists: %v", err)
} else if !exists {
glog.Infof("Key doesn't exist, attempting to create")
err := m.generateSSHKey(c.SSHUser, c.SSHKeyfile, publicKeyFile)
if err != nil {
glog.Errorf("Failed to create key pair: %v", err)
}
}
m.tunnels = &util.SSHTunnelList{}
m.dialer = m.Dial
m.setupSecureProxy(c.SSHUser, c.SSHKeyfile, publicKeyFile)
m.lastSync = m.clock.Now().Unix()
// This is pretty ugly. A better solution would be to pull this all the way up into the
// server.go file.
httpKubeletClient, ok := c.KubeletClient.(*client.HTTPKubeletClient)
if ok {
httpKubeletClient.Config.Dial = m.dialer
transport, err := client.MakeTransport(httpKubeletClient.Config)
if err != nil {
glog.Errorf("Error setting up transport over SSH: %v", err)
} else {
httpKubeletClient.Client.Transport = transport
}
} else {
glog.Errorf("Failed to cast %v to HTTPKubeletClient, skipping SSH tunnel.", c.KubeletClient)
}
healthzChecks = append(healthzChecks, healthz.NamedCheck("SSH Tunnel Check", m.IsTunnelSyncHealthy))
m.lastSyncMetric = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
Name: "apiserver_proxy_tunnel_sync_latency_secs",
Help: "The time since the last successful synchronization of the SSH tunnels for proxy requests.",
}, func() float64 { return float64(m.secondsSinceSync()) })
}
apiVersions := []string{}
if m.v1 {
if err := m.api_v1().InstallREST(m.handlerContainer); err != nil {
glog.Fatalf("Unable to setup API v1: %v", err)
}
apiVersions = append(apiVersions, "v1")
}
apiserver.InstallSupport(m.muxHelper, m.rootWebService, c.EnableProfiling, healthzChecks...)
apiserver.AddApiWebService(m.handlerContainer, c.APIPrefix, apiVersions)
defaultVersion := m.defaultAPIGroupVersion()
requestInfoResolver := &apiserver.APIRequestInfoResolver{APIPrefixes: sets.NewString(strings.TrimPrefix(defaultVersion.Root, "/")), RestMapper: defaultVersion.Mapper}
apiserver.InstallServiceErrorHandler(m.handlerContainer, requestInfoResolver, apiVersions)
// allGroups records all supported groups at /apis
allGroups := []api.APIGroup{}
if m.exp {
m.thirdPartyStorage = c.ExpDatabaseStorage
m.thirdPartyResources = map[string]*thirdpartyresourcedataetcd.REST{}
expVersion := m.experimental(c)
if err := expVersion.InstallREST(m.handlerContainer); err != nil {
glog.Fatalf("Unable to setup experimental api: %v", err)
}
g, err := latest.Group("experimental")
if err != nil {
glog.Fatalf("Unable to setup experimental api: %v", err)
}
expAPIVersions := []api.GroupVersion{
{
GroupVersion: g.Group + "/" + expVersion.Version,
Version: expVersion.Version,
},
}
storageVersion, found := c.StorageVersions[g.Group]
if !found {
glog.Fatalf("Couldn't find storage version of group %v", g.Group)
}
group := api.APIGroup{
Name: g.Group,
Versions: expAPIVersions,
PreferredVersion: api.GroupVersion{GroupVersion: g.Group + "/" + storageVersion, Version: storageVersion},
}
apiserver.AddGroupWebService(m.handlerContainer, c.APIGroupPrefix+"/"+latest.GroupOrDie("experimental").Group+"/", group)
allGroups = append(allGroups, group)
expRequestInfoResolver := &apiserver.APIRequestInfoResolver{APIPrefixes: sets.NewString(strings.TrimPrefix(expVersion.Root, "/")), RestMapper: expVersion.Mapper}
apiserver.InstallServiceErrorHandler(m.handlerContainer, expRequestInfoResolver, []string{expVersion.Version})
}
// This should be done after all groups are registered
// TODO: replace the hardcoded "apis".
apiserver.AddApisWebService(m.handlerContainer, "/apis", allGroups)
// Register root handler.
// We do not register this using restful Webservice since we do not want to surface this in api docs.
// Allow master to be embedded in contexts which already have something registered at the root
if c.EnableIndex {
m.mux.HandleFunc("/", apiserver.IndexHandler(m.handlerContainer, m.muxHelper))
}
if c.EnableLogsSupport {
apiserver.InstallLogsSupport(m.muxHelper)
}
if c.EnableUISupport {
ui.InstallSupport(m.muxHelper, m.enableSwaggerSupport)
}
if c.EnableProfiling {
m.mux.HandleFunc("/debug/pprof/", pprof.Index)
m.mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
m.mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
}
handler := http.Handler(m.mux.(*http.ServeMux))
// TODO: handle CORS and auth using go-restful
// See github.com/emicklei/go-restful/blob/master/examples/restful-CORS-filter.go, and
// github.com/emicklei/go-restful/blob/master/examples/restful-basic-authentication.go
if len(c.CorsAllowedOriginList) > 0 {
allowedOriginRegexps, err := util.CompileRegexps(c.CorsAllowedOriginList)
if err != nil {
glog.Fatalf("Invalid CORS allowed origin, --cors-allowed-origins flag was set to %v - %v", strings.Join(c.CorsAllowedOriginList, ","), err)
}
handler = apiserver.CORS(handler, allowedOriginRegexps, nil, nil, "true")
}
m.InsecureHandler = handler
attributeGetter := apiserver.NewRequestAttributeGetter(m.requestContextMapper, latest.GroupOrDie("").RESTMapper, "api")
handler = apiserver.WithAuthorizationCheck(handler, attributeGetter, m.authorizer)
// Install Authenticator
if c.Authenticator != nil {
authenticatedHandler, err := handlers.NewRequestAuthenticator(m.requestContextMapper, c.Authenticator, handlers.Unauthorized(c.SupportsBasicAuth), handler)
if err != nil {
glog.Fatalf("Could not initialize authenticator: %v", err)
}
handler = authenticatedHandler
}
// Install root web services
m.handlerContainer.Add(m.rootWebService)
// TODO: Make this optional? Consumers of master depend on this currently.
m.Handler = handler
if m.enableSwaggerSupport {
m.InstallSwaggerAPI()
}
// After all wrapping is done, put a context filter around both handlers
if handler, err := api.NewRequestContextFilter(m.requestContextMapper, m.Handler); err != nil {
glog.Fatalf("Could not initialize request context filter: %v", err)
} else {
m.Handler = handler
}
if handler, err := api.NewRequestContextFilter(m.requestContextMapper, m.InsecureHandler); err != nil {
glog.Fatalf("Could not initialize request context filter: %v", err)
} else {
m.InsecureHandler = handler
}
// TODO: Attempt clean shutdown?
if m.enableCoreControllers {
m.NewBootstrapController().Start()
}
}
// NewBootstrapController returns a controller for watching the core capabilities of the master.
func (m *Master) NewBootstrapController() *Controller {
return &Controller{
NamespaceRegistry: m.namespaceRegistry,
ServiceRegistry: m.serviceRegistry,
MasterCount: m.masterCount,
EndpointRegistry: m.endpointRegistry,
EndpointInterval: 10 * time.Second,
ServiceClusterIPRegistry: m.serviceClusterIPAllocator,
ServiceClusterIPRange: m.serviceClusterIPRange,
ServiceClusterIPInterval: 3 * time.Minute,
ServiceNodePortRegistry: m.serviceNodePortAllocator,
ServiceNodePortRange: m.serviceNodePortRange,
ServiceNodePortInterval: 3 * time.Minute,
PublicIP: m.clusterIP,
ServiceIP: m.serviceReadWriteIP,
ServicePort: m.serviceReadWritePort,
PublicServicePort: m.publicReadWritePort,
}
}
// InstallSwaggerAPI installs the /swaggerapi/ endpoint to allow schema discovery
// and traversal. It is optional to allow consumers of the Kubernetes master to
// register their own web services into the Kubernetes mux prior to initialization
// of swagger, so that other resource types show up in the documentation.
func (m *Master) InstallSwaggerAPI() {
hostAndPort := m.externalHost
protocol := "https://"
// TODO: this is kind of messed up, we should just pipe in the full URL from the outside, rather
// than guessing at it.
if len(m.externalHost) == 0 && m.clusterIP != nil {
host := m.clusterIP.String()
if m.publicReadWritePort != 0 {
hostAndPort = net.JoinHostPort(host, strconv.Itoa(m.publicReadWritePort))
}
}
webServicesUrl := protocol + hostAndPort
// Enable swagger UI and discovery API
swaggerConfig := swagger.Config{
WebServicesUrl: webServicesUrl,
WebServices: m.handlerContainer.RegisteredWebServices(),
ApiPath: "/swaggerapi/",
SwaggerPath: "/swaggerui/",
SwaggerFilePath: "/swagger-ui/",
}
swagger.RegisterSwaggerService(swaggerConfig, m.handlerContainer)
}
func (m *Master) getServersToValidate(c *Config) map[string]apiserver.Server {
serversToValidate := map[string]apiserver.Server{
"controller-manager": {Addr: "127.0.0.1", Port: ports.ControllerManagerPort, Path: "/healthz"},
"scheduler": {Addr: "127.0.0.1", Port: ports.SchedulerPort, Path: "/healthz"},
}
for ix, machine := range c.DatabaseStorage.Backends() {
etcdUrl, err := url.Parse(machine)
if err != nil {
glog.Errorf("Failed to parse etcd url for validation: %v", err)
continue
}
var port int
var addr string
if strings.Contains(etcdUrl.Host, ":") {
var portString string
addr, portString, err = net.SplitHostPort(etcdUrl.Host)
if err != nil {
glog.Errorf("Failed to split host/port: %s (%v)", etcdUrl.Host, err)
continue
}
port, _ = strconv.Atoi(portString)
} else {
addr = etcdUrl.Host
port = 4001
}
serversToValidate[fmt.Sprintf("etcd-%d", ix)] = apiserver.Server{Addr: addr, Port: port, Path: "/health", Validate: etcdstorage.EtcdHealthCheck}
}
return serversToValidate
}
func (m *Master) defaultAPIGroupVersion() *apiserver.APIGroupVersion {
return &apiserver.APIGroupVersion{
Root: m.apiPrefix,
Mapper: latest.GroupOrDie("").RESTMapper,
Creater: api.Scheme,
Convertor: api.Scheme,
Typer: api.Scheme,
Linker: latest.GroupOrDie("").SelfLinker,
Admit: m.admissionControl,
Context: m.requestContextMapper,
ProxyDialerFn: m.dialer,
MinRequestTimeout: m.minRequestTimeout,
}
}
// api_v1 returns the resources and codec for API version v1.
func (m *Master) api_v1() *apiserver.APIGroupVersion {
storage := make(map[string]rest.Storage)
for k, v := range m.storage {
storage[strings.ToLower(k)] = v
}
version := m.defaultAPIGroupVersion()
version.Storage = storage
version.Version = "v1"
version.Codec = v1.Codec
return version
}
// HasThirdPartyResource returns true if a particular third party resource currently installed.
func (m *Master) HasThirdPartyResource(rsrc *expapi.ThirdPartyResource) (bool, error) {
_, group, err := thirdpartyresourcedata.ExtractApiGroupAndKind(rsrc)
if err != nil {
return false, err
}
path := makeThirdPartyPath(group)
services := m.handlerContainer.RegisteredWebServices()
for ix := range services {
if services[ix].RootPath() == path {
return true, nil
}
}
return false, nil
}
func (m *Master) removeThirdPartyStorage(path string) error {
m.thirdPartyResourcesLock.Lock()
defer m.thirdPartyResourcesLock.Unlock()
storage, found := m.thirdPartyResources[path]
if found {
if err := m.removeAllThirdPartyResources(storage); err != nil {
return err
}
delete(m.thirdPartyResources, path)
}
return nil
}
// RemoveThirdPartyResource removes all resources matching `path`. Also deletes any stored data
func (m *Master) RemoveThirdPartyResource(path string) error {
if err := m.removeThirdPartyStorage(path); err != nil {
return err
}
services := m.handlerContainer.RegisteredWebServices()
for ix := range services {
root := services[ix].RootPath()
if root == path || strings.HasPrefix(root, path+"/") {
m.handlerContainer.Remove(services[ix])
}
}
return nil
}
func (m *Master) removeAllThirdPartyResources(registry *thirdpartyresourcedataetcd.REST) error {
ctx := api.NewDefaultContext()
existingData, err := registry.List(ctx, labels.Everything(), fields.Everything())
if err != nil {
return err
}
list, ok := existingData.(*expapi.ThirdPartyResourceDataList)
if !ok {
return fmt.Errorf("expected a *ThirdPartyResourceDataList, got %#v", list)
}
for ix := range list.Items {
item := &list.Items[ix]
if _, err := registry.Delete(ctx, item.Name, nil); err != nil {
return err
}
}
return nil
}
// ListThirdPartyResources lists all currently installed third party resources
func (m *Master) ListThirdPartyResources() []string {
m.thirdPartyResourcesLock.RLock()
defer m.thirdPartyResourcesLock.RUnlock()
result := []string{}
for key := range m.thirdPartyResources {
result = append(result, key)
}
return result
}
func (m *Master) addThirdPartyResourceStorage(path string, storage *thirdpartyresourcedataetcd.REST) {
m.thirdPartyResourcesLock.Lock()
defer m.thirdPartyResourcesLock.Unlock()
m.thirdPartyResources[path] = storage
}
// InstallThirdPartyResource installs a third party resource specified by 'rsrc'. When a resource is
// installed a corresponding RESTful resource is added as a valid path in the web service provided by
// the master.
//
// For example, if you install a resource ThirdPartyResource{ Name: "foo.company.com", Versions: {"v1"} }
// then the following RESTful resource is created on the server:
// http://<host>/apis/company.com/v1/foos/...
func (m *Master) InstallThirdPartyResource(rsrc *expapi.ThirdPartyResource) error {
kind, group, err := thirdpartyresourcedata.ExtractApiGroupAndKind(rsrc)
if err != nil {
return err
}
thirdparty := m.thirdpartyapi(group, kind, rsrc.Versions[0].Name)
if err := thirdparty.InstallREST(m.handlerContainer); err != nil {
glog.Fatalf("Unable to setup thirdparty api: %v", err)
}
path := makeThirdPartyPath(group)
groupVersion := api.GroupVersion{
GroupVersion: group + "/" + rsrc.Versions[0].Name,
Version: rsrc.Versions[0].Name,
}
apiGroup := api.APIGroup{
Name: group,
Versions: []api.GroupVersion{groupVersion},
}
apiserver.AddGroupWebService(m.handlerContainer, path, apiGroup)
m.addThirdPartyResourceStorage(path, thirdparty.Storage[strings.ToLower(kind)+"s"].(*thirdpartyresourcedataetcd.REST))
thirdPartyRequestInfoResolver := &apiserver.APIRequestInfoResolver{APIPrefixes: sets.NewString(strings.TrimPrefix(group, "/")), RestMapper: thirdparty.Mapper}
apiserver.InstallServiceErrorHandler(m.handlerContainer, thirdPartyRequestInfoResolver, []string{thirdparty.Version})
return nil
}
func (m *Master) thirdpartyapi(group, kind, version string) *apiserver.APIGroupVersion {
resourceStorage := thirdpartyresourcedataetcd.NewREST(m.thirdPartyStorage, group, kind)
apiRoot := makeThirdPartyPath(group)
storage := map[string]rest.Storage{
strings.ToLower(kind) + "s": resourceStorage,
}
return &apiserver.APIGroupVersion{
Root: apiRoot,
Creater: thirdpartyresourcedata.NewObjectCreator(version, api.Scheme),
Convertor: api.Scheme,
Typer: api.Scheme,
Mapper: thirdpartyresourcedata.NewMapper(latest.GroupOrDie("experimental").RESTMapper, kind, version, group),
Codec: thirdpartyresourcedata.NewCodec(latest.GroupOrDie("experimental").Codec, kind),
Linker: latest.GroupOrDie("experimental").SelfLinker,
Storage: storage,
Version: version,
ServerVersion: latest.GroupOrDie("").GroupVersion,
Context: m.requestContextMapper,
ProxyDialerFn: m.dialer,
MinRequestTimeout: m.minRequestTimeout,
}
}
// experimental returns the resources and codec for the experimental api
func (m *Master) experimental(c *Config) *apiserver.APIGroupVersion {
controllerStorage := expcontrolleretcd.NewStorage(c.ExpDatabaseStorage)
autoscalerStorage := horizontalpodautoscaleretcd.NewREST(c.ExpDatabaseStorage)
thirdPartyResourceStorage := thirdpartyresourceetcd.NewREST(c.ExpDatabaseStorage)
daemonSetStorage, daemonSetStatusStorage := daemonetcd.NewREST(c.ExpDatabaseStorage)
deploymentStorage := deploymentetcd.NewStorage(c.ExpDatabaseStorage)
jobStorage, jobStatusStorage := jobetcd.NewREST(c.ExpDatabaseStorage)
thirdPartyControl := ThirdPartyController{
master: m,
thirdPartyResourceRegistry: thirdPartyResourceStorage,
}
go func() {
util.Forever(func() {
if err := thirdPartyControl.SyncResources(); err != nil {
glog.Warningf("third party resource sync failed: %v", err)
}
}, 10*time.Second)
}()
storage := map[string]rest.Storage{
strings.ToLower("replicationControllers"): controllerStorage.ReplicationController,
strings.ToLower("replicationControllers/scale"): controllerStorage.Scale,
strings.ToLower("horizontalpodautoscalers"): autoscalerStorage,
strings.ToLower("thirdpartyresources"): thirdPartyResourceStorage,
strings.ToLower("daemonsets"): daemonSetStorage,
strings.ToLower("daemonsets/status"): daemonSetStatusStorage,
strings.ToLower("deployments"): deploymentStorage.Deployment,
strings.ToLower("deployments/scale"): deploymentStorage.Scale,
strings.ToLower("jobs"): jobStorage,
strings.ToLower("jobs/status"): jobStatusStorage,
}
expMeta := latest.GroupOrDie("experimental")
return &apiserver.APIGroupVersion{
Root: m.apiGroupPrefix,
Creater: api.Scheme,
Convertor: api.Scheme,
Typer: api.Scheme,
Mapper: expMeta.RESTMapper,
Codec: expMeta.Codec,
Linker: expMeta.SelfLinker,