forked from google/cadvisor
-
Notifications
You must be signed in to change notification settings - Fork 0
/
manager.go
1337 lines (1159 loc) · 40.4 KB
/
manager.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 Google Inc. 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.
// Manager of cAdvisor-monitored containers.
package manager
import (
"flag"
"fmt"
"os"
"path"
"strconv"
"strings"
"sync"
"time"
"github.com/google/cadvisor/cache/memory"
"github.com/google/cadvisor/collector"
"github.com/google/cadvisor/container"
"github.com/google/cadvisor/container/crio"
"github.com/google/cadvisor/container/docker"
"github.com/google/cadvisor/container/raw"
"github.com/google/cadvisor/container/rkt"
"github.com/google/cadvisor/container/systemd"
"github.com/google/cadvisor/events"
"github.com/google/cadvisor/fs"
info "github.com/google/cadvisor/info/v1"
"github.com/google/cadvisor/info/v2"
"github.com/google/cadvisor/machine"
"github.com/google/cadvisor/manager/watcher"
rawwatcher "github.com/google/cadvisor/manager/watcher/raw"
rktwatcher "github.com/google/cadvisor/manager/watcher/rkt"
"github.com/google/cadvisor/utils/oomparser"
"github.com/google/cadvisor/utils/sysfs"
"github.com/google/cadvisor/version"
"net/http"
"github.com/golang/glog"
"github.com/opencontainers/runc/libcontainer/cgroups"
)
var globalHousekeepingInterval = flag.Duration("global_housekeeping_interval", 1*time.Minute, "Interval between global housekeepings")
var logCadvisorUsage = flag.Bool("log_cadvisor_usage", false, "Whether to log the usage of the cAdvisor container")
var eventStorageAgeLimit = flag.String("event_storage_age_limit", "default=24h", "Max length of time for which to store events (per type). Value is a comma separated list of key values, where the keys are event types (e.g.: creation, oom) or \"default\" and the value is a duration. Default is applied to all non-specified event types")
var eventStorageEventLimit = flag.String("event_storage_event_limit", "default=100000", "Max number of events to store (per type). Value is a comma separated list of key values, where the keys are event types (e.g.: creation, oom) or \"default\" and the value is an integer. Default is applied to all non-specified event types")
var applicationMetricsCountLimit = flag.Int("application_metrics_count_limit", 100, "Max number of application metrics to store (per container)")
// The Manager interface defines operations for starting a manager and getting
// container and machine information.
type Manager interface {
// Start the manager. Calling other manager methods before this returns
// may produce undefined behavior.
Start() error
// Stops the manager.
Stop() error
// information about a container.
GetContainerInfo(containerName string, query *info.ContainerInfoRequest) (*info.ContainerInfo, error)
// Get V2 information about a container.
// Recursive (subcontainer) requests are best-effort, and may return a partial result alongside an
// error in the partial failure case.
GetContainerInfoV2(containerName string, options v2.RequestOptions) (map[string]v2.ContainerInfo, error)
// Get information about all subcontainers of the specified container (includes self).
SubcontainersInfo(containerName string, query *info.ContainerInfoRequest) ([]*info.ContainerInfo, error)
// Gets all the Docker containers. Return is a map from full container name to ContainerInfo.
AllDockerContainers(query *info.ContainerInfoRequest) (map[string]info.ContainerInfo, error)
// Gets information about a specific Docker container. The specified name is within the Docker namespace.
DockerContainer(dockerName string, query *info.ContainerInfoRequest) (info.ContainerInfo, error)
// Gets spec for all containers based on request options.
GetContainerSpec(containerName string, options v2.RequestOptions) (map[string]v2.ContainerSpec, error)
// Gets summary stats for all containers based on request options.
GetDerivedStats(containerName string, options v2.RequestOptions) (map[string]v2.DerivedStats, error)
// Get info for all requested containers based on the request options.
GetRequestedContainersInfo(containerName string, options v2.RequestOptions) (map[string]*info.ContainerInfo, error)
// Returns true if the named container exists.
Exists(containerName string) bool
// Get information about the machine.
GetMachineInfo() (*info.MachineInfo, error)
// Get version information about different components we depend on.
GetVersionInfo() (*info.VersionInfo, error)
// GetFsInfoByFsUUID returns the information of the device having the
// specified filesystem uuid. If no such device with the UUID exists, this
// function will return the fs.ErrNoSuchDevice error.
GetFsInfoByFsUUID(uuid string) (v2.FsInfo, error)
// Get filesystem information for the filesystem that contains the given directory
GetDirFsInfo(dir string) (v2.FsInfo, error)
// Get filesystem information for a given label.
// Returns information for all global filesystems if label is empty.
GetFsInfo(label string) ([]v2.FsInfo, error)
// Get ps output for a container.
GetProcessList(containerName string, options v2.RequestOptions) ([]v2.ProcessInfo, error)
// Get events streamed through passedChannel that fit the request.
WatchForEvents(request *events.Request) (*events.EventChannel, error)
// Get past events that have been detected and that fit the request.
GetPastEvents(request *events.Request) ([]*info.Event, error)
CloseEventChannel(watch_id int)
// Get status information about docker.
DockerInfo() (info.DockerStatus, error)
// Get details about interesting docker images.
DockerImages() ([]info.DockerImage, error)
// Returns debugging information. Map of lines per category.
DebugInfo() map[string][]string
}
// New takes a memory storage and returns a new manager.
func New(memoryCache *memory.InMemoryCache, sysfs sysfs.SysFs, maxHousekeepingInterval time.Duration, allowDynamicHousekeeping bool, ignoreMetricsSet container.MetricSet, collectorHttpClient *http.Client) (Manager, error) {
if memoryCache == nil {
return nil, fmt.Errorf("manager requires memory storage")
}
// Detect the container we are running on.
selfContainer, err := cgroups.GetOwnCgroupPath("cpu")
if err != nil {
return nil, err
}
glog.Infof("cAdvisor running in container: %q", selfContainer)
dockerStatus, err := docker.Status()
if err != nil {
glog.Warningf("Unable to connect to Docker: %v", err)
}
rktPath, err := rkt.RktPath()
if err != nil {
glog.Warningf("unable to connect to Rkt api service: %v", err)
}
crioClient, err := crio.Client()
if err != nil {
return nil, err
}
crioInfo, err := crioClient.Info()
if err != nil {
glog.Warningf("unable to connect to CRI-O api service: %v", err)
}
context := fs.Context{
Docker: fs.DockerContext{
Root: docker.RootDir(),
Driver: dockerStatus.Driver,
DriverStatus: dockerStatus.DriverStatus,
},
RktPath: rktPath,
Crio: fs.CrioContext{
Root: crioInfo.StorageRoot,
},
}
fsInfo, err := fs.NewFsInfo(context)
if err != nil {
return nil, err
}
// If cAdvisor was started with host's rootfs mounted, assume that its running
// in its own namespaces.
inHostNamespace := false
if _, err := os.Stat("/rootfs/proc"); os.IsNotExist(err) {
inHostNamespace = true
}
// Register for new subcontainers.
eventsChannel := make(chan watcher.ContainerEvent, 16)
newManager := &manager{
containers: make(map[namespacedContainerName]*containerData),
quitChannels: make([]chan error, 0, 2),
memoryCache: memoryCache,
fsInfo: fsInfo,
cadvisorContainer: selfContainer,
inHostNamespace: inHostNamespace,
startupTime: time.Now(),
maxHousekeepingInterval: maxHousekeepingInterval,
allowDynamicHousekeeping: allowDynamicHousekeeping,
ignoreMetrics: ignoreMetricsSet,
containerWatchers: []watcher.ContainerWatcher{},
eventsChannel: eventsChannel,
collectorHttpClient: collectorHttpClient,
}
machineInfo, err := machine.Info(sysfs, fsInfo, inHostNamespace)
if err != nil {
return nil, err
}
newManager.machineInfo = *machineInfo
glog.Infof("Machine: %+v", newManager.machineInfo)
versionInfo, err := getVersionInfo()
if err != nil {
return nil, err
}
glog.Infof("Version: %+v", *versionInfo)
newManager.eventHandler = events.NewEventManager(parseEventsStoragePolicy())
return newManager, nil
}
// A namespaced container name.
type namespacedContainerName struct {
// The namespace of the container. Can be empty for the root namespace.
Namespace string
// The name of the container in this namespace.
Name string
}
type manager struct {
containers map[namespacedContainerName]*containerData
containersLock sync.RWMutex
memoryCache *memory.InMemoryCache
fsInfo fs.FsInfo
machineInfo info.MachineInfo
quitChannels []chan error
cadvisorContainer string
inHostNamespace bool
eventHandler events.EventManager
startupTime time.Time
maxHousekeepingInterval time.Duration
allowDynamicHousekeeping bool
ignoreMetrics container.MetricSet
containerWatchers []watcher.ContainerWatcher
eventsChannel chan watcher.ContainerEvent
collectorHttpClient *http.Client
}
// Start the container manager.
func (self *manager) Start() error {
err := docker.Register(self, self.fsInfo, self.ignoreMetrics)
if err != nil {
glog.Warningf("Docker container factory registration failed: %v.", err)
}
err = rkt.Register(self, self.fsInfo, self.ignoreMetrics)
if err != nil {
glog.Warningf("Registration of the rkt container factory failed: %v", err)
} else {
watcher, err := rktwatcher.NewRktContainerWatcher()
if err != nil {
return err
}
self.containerWatchers = append(self.containerWatchers, watcher)
}
err = crio.Register(self, self.fsInfo, self.ignoreMetrics)
if err != nil {
glog.Warningf("Registration of the crio container factory failed: %v", err)
}
err = systemd.Register(self, self.fsInfo, self.ignoreMetrics)
if err != nil {
glog.Warningf("Registration of the systemd container factory failed: %v", err)
}
err = raw.Register(self, self.fsInfo, self.ignoreMetrics)
if err != nil {
glog.Errorf("Registration of the raw container factory failed: %v", err)
}
rawWatcher, err := rawwatcher.NewRawContainerWatcher()
if err != nil {
return err
}
self.containerWatchers = append(self.containerWatchers, rawWatcher)
// Watch for OOMs.
err = self.watchForNewOoms()
if err != nil {
glog.Warningf("Could not configure a source for OOM detection, disabling OOM events: %v", err)
}
// If there are no factories, don't start any housekeeping and serve the information we do have.
if !container.HasFactories() {
return nil
}
// Create root and then recover all containers.
err = self.createContainer("/", watcher.Raw)
if err != nil {
return err
}
glog.Infof("Starting recovery of all containers")
err = self.detectSubcontainers("/")
if err != nil {
return err
}
glog.Infof("Recovery completed")
// Watch for new container.
quitWatcher := make(chan error)
err = self.watchForNewContainers(quitWatcher)
if err != nil {
return err
}
self.quitChannels = append(self.quitChannels, quitWatcher)
// Look for new containers in the main housekeeping thread.
quitGlobalHousekeeping := make(chan error)
self.quitChannels = append(self.quitChannels, quitGlobalHousekeeping)
go self.globalHousekeeping(quitGlobalHousekeeping)
return nil
}
func (self *manager) Stop() error {
// Stop and wait on all quit channels.
for i, c := range self.quitChannels {
// Send the exit signal and wait on the thread to exit (by closing the channel).
c <- nil
err := <-c
if err != nil {
// Remove the channels that quit successfully.
self.quitChannels = self.quitChannels[i:]
return err
}
}
self.quitChannels = make([]chan error, 0, 2)
return nil
}
func (self *manager) globalHousekeeping(quit chan error) {
// Long housekeeping is either 100ms or half of the housekeeping interval.
longHousekeeping := 100 * time.Millisecond
if *globalHousekeepingInterval/2 < longHousekeeping {
longHousekeeping = *globalHousekeepingInterval / 2
}
ticker := time.Tick(*globalHousekeepingInterval)
for {
select {
case t := <-ticker:
start := time.Now()
// Check for new containers.
err := self.detectSubcontainers("/")
if err != nil {
glog.Errorf("Failed to detect containers: %s", err)
}
// Log if housekeeping took too long.
duration := time.Since(start)
if duration >= longHousekeeping {
glog.V(3).Infof("Global Housekeeping(%d) took %s", t.Unix(), duration)
}
case <-quit:
// Quit if asked to do so.
quit <- nil
glog.Infof("Exiting global housekeeping thread")
return
}
}
}
func (self *manager) getContainerData(containerName string) (*containerData, error) {
var cont *containerData
var ok bool
func() {
self.containersLock.RLock()
defer self.containersLock.RUnlock()
// Ensure we have the container.
cont, ok = self.containers[namespacedContainerName{
Name: containerName,
}]
}()
if !ok {
return nil, fmt.Errorf("unknown container %q", containerName)
}
return cont, nil
}
func (self *manager) GetDerivedStats(containerName string, options v2.RequestOptions) (map[string]v2.DerivedStats, error) {
conts, err := self.getRequestedContainers(containerName, options)
if err != nil {
return nil, err
}
var errs partialFailure
stats := make(map[string]v2.DerivedStats)
for name, cont := range conts {
d, err := cont.DerivedStats()
if err != nil {
errs.append(name, "DerivedStats", err)
}
stats[name] = d
}
return stats, errs.OrNil()
}
func (self *manager) GetContainerSpec(containerName string, options v2.RequestOptions) (map[string]v2.ContainerSpec, error) {
conts, err := self.getRequestedContainers(containerName, options)
if err != nil {
return nil, err
}
var errs partialFailure
specs := make(map[string]v2.ContainerSpec)
for name, cont := range conts {
cinfo, err := cont.GetInfo(false)
if err != nil {
errs.append(name, "GetInfo", err)
}
spec := self.getV2Spec(cinfo)
specs[name] = spec
}
return specs, errs.OrNil()
}
// Get V2 container spec from v1 container info.
func (self *manager) getV2Spec(cinfo *containerInfo) v2.ContainerSpec {
spec := self.getAdjustedSpec(cinfo)
return v2.ContainerSpecFromV1(&spec, cinfo.Aliases, cinfo.Namespace)
}
func (self *manager) getAdjustedSpec(cinfo *containerInfo) info.ContainerSpec {
spec := cinfo.Spec
// Set default value to an actual value
if spec.HasMemory {
// Memory.Limit is 0 means there's no limit
if spec.Memory.Limit == 0 {
spec.Memory.Limit = uint64(self.machineInfo.MemoryCapacity)
}
}
return spec
}
func (self *manager) GetContainerInfo(containerName string, query *info.ContainerInfoRequest) (*info.ContainerInfo, error) {
cont, err := self.getContainerData(containerName)
if err != nil {
return nil, err
}
return self.containerDataToContainerInfo(cont, query)
}
func (self *manager) GetContainerInfoV2(containerName string, options v2.RequestOptions) (map[string]v2.ContainerInfo, error) {
containers, err := self.getRequestedContainers(containerName, options)
if err != nil {
return nil, err
}
var errs partialFailure
var nilTime time.Time // Ignored.
infos := make(map[string]v2.ContainerInfo, len(containers))
for name, container := range containers {
result := v2.ContainerInfo{}
cinfo, err := container.GetInfo(false)
if err != nil {
errs.append(name, "GetInfo", err)
infos[name] = result
continue
}
result.Spec = self.getV2Spec(cinfo)
stats, err := self.memoryCache.RecentStats(name, nilTime, nilTime, options.Count)
if err != nil {
errs.append(name, "RecentStats", err)
infos[name] = result
continue
}
result.Stats = v2.ContainerStatsFromV1(containerName, &cinfo.Spec, stats)
infos[name] = result
}
return infos, errs.OrNil()
}
func (self *manager) containerDataToContainerInfo(cont *containerData, query *info.ContainerInfoRequest) (*info.ContainerInfo, error) {
// Get the info from the container.
cinfo, err := cont.GetInfo(true)
if err != nil {
return nil, err
}
stats, err := self.memoryCache.RecentStats(cinfo.Name, query.Start, query.End, query.NumStats)
if err != nil {
return nil, err
}
// Make a copy of the info for the user.
ret := &info.ContainerInfo{
ContainerReference: cinfo.ContainerReference,
Subcontainers: cinfo.Subcontainers,
Spec: self.getAdjustedSpec(cinfo),
Stats: stats,
}
return ret, nil
}
func (self *manager) getContainer(containerName string) (*containerData, error) {
self.containersLock.RLock()
defer self.containersLock.RUnlock()
cont, ok := self.containers[namespacedContainerName{Name: containerName}]
if !ok {
return nil, fmt.Errorf("unknown container %q", containerName)
}
return cont, nil
}
func (self *manager) getSubcontainers(containerName string) map[string]*containerData {
self.containersLock.RLock()
defer self.containersLock.RUnlock()
containersMap := make(map[string]*containerData, len(self.containers))
// Get all the unique subcontainers of the specified container
matchedName := path.Join(containerName, "/")
for i := range self.containers {
name := self.containers[i].info.Name
if name == containerName || strings.HasPrefix(name, matchedName) {
containersMap[self.containers[i].info.Name] = self.containers[i]
}
}
return containersMap
}
func (self *manager) SubcontainersInfo(containerName string, query *info.ContainerInfoRequest) ([]*info.ContainerInfo, error) {
containersMap := self.getSubcontainers(containerName)
containers := make([]*containerData, 0, len(containersMap))
for _, cont := range containersMap {
containers = append(containers, cont)
}
return self.containerDataSliceToContainerInfoSlice(containers, query)
}
func (self *manager) getAllDockerContainers() map[string]*containerData {
self.containersLock.RLock()
defer self.containersLock.RUnlock()
containers := make(map[string]*containerData, len(self.containers))
// Get containers in the Docker namespace.
for name, cont := range self.containers {
if name.Namespace == docker.DockerNamespace {
containers[cont.info.Name] = cont
}
}
return containers
}
func (self *manager) AllDockerContainers(query *info.ContainerInfoRequest) (map[string]info.ContainerInfo, error) {
containers := self.getAllDockerContainers()
output := make(map[string]info.ContainerInfo, len(containers))
for name, cont := range containers {
inf, err := self.containerDataToContainerInfo(cont, query)
if err != nil {
return nil, err
}
output[name] = *inf
}
return output, nil
}
func (self *manager) getDockerContainer(containerName string) (*containerData, error) {
self.containersLock.RLock()
defer self.containersLock.RUnlock()
// Check for the container in the Docker container namespace.
cont, ok := self.containers[namespacedContainerName{
Namespace: docker.DockerNamespace,
Name: containerName,
}]
// Look for container by short prefix name if no exact match found.
if !ok {
for contName, c := range self.containers {
if contName.Namespace == docker.DockerNamespace && strings.HasPrefix(contName.Name, containerName) {
if cont == nil {
cont = c
} else {
return nil, fmt.Errorf("unable to find container. Container %q is not unique", containerName)
}
}
}
if cont == nil {
return nil, fmt.Errorf("unable to find Docker container %q", containerName)
}
}
return cont, nil
}
func (self *manager) DockerContainer(containerName string, query *info.ContainerInfoRequest) (info.ContainerInfo, error) {
container, err := self.getDockerContainer(containerName)
if err != nil {
return info.ContainerInfo{}, err
}
inf, err := self.containerDataToContainerInfo(container, query)
if err != nil {
return info.ContainerInfo{}, err
}
return *inf, nil
}
func (self *manager) containerDataSliceToContainerInfoSlice(containers []*containerData, query *info.ContainerInfoRequest) ([]*info.ContainerInfo, error) {
if len(containers) == 0 {
return nil, fmt.Errorf("no containers found")
}
// Get the info for each container.
output := make([]*info.ContainerInfo, 0, len(containers))
for i := range containers {
cinfo, err := self.containerDataToContainerInfo(containers[i], query)
if err != nil {
// Skip containers with errors, we try to degrade gracefully.
continue
}
output = append(output, cinfo)
}
return output, nil
}
func (self *manager) GetRequestedContainersInfo(containerName string, options v2.RequestOptions) (map[string]*info.ContainerInfo, error) {
containers, err := self.getRequestedContainers(containerName, options)
if err != nil {
return nil, err
}
var errs partialFailure
containersMap := make(map[string]*info.ContainerInfo)
query := info.ContainerInfoRequest{
NumStats: options.Count,
}
for name, data := range containers {
info, err := self.containerDataToContainerInfo(data, &query)
if err != nil {
errs.append(name, "containerDataToContainerInfo", err)
}
containersMap[name] = info
}
return containersMap, errs.OrNil()
}
func (self *manager) getRequestedContainers(containerName string, options v2.RequestOptions) (map[string]*containerData, error) {
containersMap := make(map[string]*containerData)
switch options.IdType {
case v2.TypeName:
if options.Recursive == false {
cont, err := self.getContainer(containerName)
if err != nil {
return containersMap, err
}
containersMap[cont.info.Name] = cont
} else {
containersMap = self.getSubcontainers(containerName)
if len(containersMap) == 0 {
return containersMap, fmt.Errorf("unknown container: %q", containerName)
}
}
case v2.TypeDocker:
if options.Recursive == false {
containerName = strings.TrimPrefix(containerName, "/")
cont, err := self.getDockerContainer(containerName)
if err != nil {
return containersMap, err
}
containersMap[cont.info.Name] = cont
} else {
if containerName != "/" {
return containersMap, fmt.Errorf("invalid request for docker container %q with subcontainers", containerName)
}
containersMap = self.getAllDockerContainers()
}
default:
return containersMap, fmt.Errorf("invalid request type %q", options.IdType)
}
return containersMap, nil
}
func (self *manager) GetDirFsInfo(dir string) (v2.FsInfo, error) {
device, err := self.fsInfo.GetDirFsDevice(dir)
if err != nil {
return v2.FsInfo{}, fmt.Errorf("failed to get device for dir %q: %v", dir, err)
}
return self.getFsInfoByDeviceName(device.Device)
}
func (self *manager) GetFsInfoByFsUUID(uuid string) (v2.FsInfo, error) {
device, err := self.fsInfo.GetDeviceInfoByFsUUID(uuid)
if err != nil {
return v2.FsInfo{}, err
}
return self.getFsInfoByDeviceName(device.Device)
}
func (self *manager) GetFsInfo(label string) ([]v2.FsInfo, error) {
var empty time.Time
// Get latest data from filesystems hanging off root container.
stats, err := self.memoryCache.RecentStats("/", empty, empty, 1)
if err != nil {
return nil, err
}
dev := ""
if len(label) != 0 {
dev, err = self.fsInfo.GetDeviceForLabel(label)
if err != nil {
return nil, err
}
}
fsInfo := []v2.FsInfo{}
for i := range stats[0].Filesystem {
fs := stats[0].Filesystem[i]
if len(label) != 0 && fs.Device != dev {
continue
}
mountpoint, err := self.fsInfo.GetMountpointForDevice(fs.Device)
if err != nil {
return nil, err
}
labels, err := self.fsInfo.GetLabelsForDevice(fs.Device)
if err != nil {
return nil, err
}
fi := v2.FsInfo{
Timestamp: stats[0].Timestamp,
Device: fs.Device,
Mountpoint: mountpoint,
Capacity: fs.Limit,
Usage: fs.Usage,
Available: fs.Available,
Labels: labels,
}
if fs.HasInodes {
fi.Inodes = &fs.Inodes
fi.InodesFree = &fs.InodesFree
}
fsInfo = append(fsInfo, fi)
}
return fsInfo, nil
}
func (m *manager) GetMachineInfo() (*info.MachineInfo, error) {
// Copy and return the MachineInfo.
return &m.machineInfo, nil
}
func (m *manager) GetVersionInfo() (*info.VersionInfo, error) {
// TODO: Consider caching this and periodically updating. The VersionInfo may change if
// the docker daemon is started after the cAdvisor client is created. Caching the value
// would be helpful so we would be able to return the last known docker version if
// docker was down at the time of a query.
return getVersionInfo()
}
func (m *manager) Exists(containerName string) bool {
m.containersLock.Lock()
defer m.containersLock.Unlock()
namespacedName := namespacedContainerName{
Name: containerName,
}
_, ok := m.containers[namespacedName]
if ok {
return true
}
return false
}
func (m *manager) GetProcessList(containerName string, options v2.RequestOptions) ([]v2.ProcessInfo, error) {
// override recursive. Only support single container listing.
options.Recursive = false
conts, err := m.getRequestedContainers(containerName, options)
if err != nil {
return nil, err
}
if len(conts) != 1 {
return nil, fmt.Errorf("Expected the request to match only one container")
}
// TODO(rjnagal): handle count? Only if we can do count by type (eg. top 5 cpu users)
ps := []v2.ProcessInfo{}
for _, cont := range conts {
ps, err = cont.GetProcessList(m.cadvisorContainer, m.inHostNamespace)
if err != nil {
return nil, err
}
}
return ps, nil
}
func (m *manager) registerCollectors(collectorConfigs map[string]string, cont *containerData) error {
for k, v := range collectorConfigs {
configFile, err := cont.ReadFile(v, m.inHostNamespace)
if err != nil {
return fmt.Errorf("failed to read config file %q for config %q, container %q: %v", k, v, cont.info.Name, err)
}
glog.V(3).Infof("Got config from %q: %q", v, configFile)
if strings.HasPrefix(k, "prometheus") || strings.HasPrefix(k, "Prometheus") {
newCollector, err := collector.NewPrometheusCollector(k, configFile, *applicationMetricsCountLimit, cont.handler, m.collectorHttpClient)
if err != nil {
glog.Infof("failed to create collector for container %q, config %q: %v", cont.info.Name, k, err)
return err
}
err = cont.collectorManager.RegisterCollector(newCollector)
if err != nil {
glog.Infof("failed to register collector for container %q, config %q: %v", cont.info.Name, k, err)
return err
}
} else {
newCollector, err := collector.NewCollector(k, configFile, *applicationMetricsCountLimit, cont.handler, m.collectorHttpClient)
if err != nil {
glog.Infof("failed to create collector for container %q, config %q: %v", cont.info.Name, k, err)
return err
}
err = cont.collectorManager.RegisterCollector(newCollector)
if err != nil {
glog.Infof("failed to register collector for container %q, config %q: %v", cont.info.Name, k, err)
return err
}
}
}
return nil
}
// Enables overwriting an existing containerData/Handler object for a given containerName.
// Can't use createContainer as it just returns if a given containerName has a handler already.
// Ex: rkt handler will want to take priority over the raw handler, but the raw handler might be created first.
// Only allow raw handler to be overridden
func (m *manager) overrideContainer(containerName string, watchSource watcher.ContainerWatchSource) error {
m.containersLock.Lock()
defer m.containersLock.Unlock()
namespacedName := namespacedContainerName{
Name: containerName,
}
if _, ok := m.containers[namespacedName]; ok {
containerData := m.containers[namespacedName]
if containerData.handler.Type() != container.ContainerTypeRaw {
return nil
}
err := m.destroyContainerLocked(containerName)
if err != nil {
return fmt.Errorf("overrideContainer: failed to destroy containerData/handler for %v: %v", containerName, err)
}
}
return m.createContainerLocked(containerName, watchSource)
}
// Create a container.
func (m *manager) createContainer(containerName string, watchSource watcher.ContainerWatchSource) error {
m.containersLock.Lock()
defer m.containersLock.Unlock()
return m.createContainerLocked(containerName, watchSource)
}
func (m *manager) createContainerLocked(containerName string, watchSource watcher.ContainerWatchSource) error {
namespacedName := namespacedContainerName{
Name: containerName,
}
// Check that the container didn't already exist.
if _, ok := m.containers[namespacedName]; ok {
return nil
}
handler, accept, err := container.NewContainerHandler(containerName, watchSource, m.inHostNamespace)
if err != nil {
return err
}
if !accept {
// ignoring this container.
glog.V(4).Infof("ignoring container %q", containerName)
return nil
}
collectorManager, err := collector.NewCollectorManager()
if err != nil {
return err
}
logUsage := *logCadvisorUsage && containerName == m.cadvisorContainer
cont, err := newContainerData(containerName, m.memoryCache, handler, logUsage, collectorManager, m.maxHousekeepingInterval, m.allowDynamicHousekeeping)
if err != nil {
return err
}
// Add collectors
labels := handler.GetContainerLabels()
collectorConfigs := collector.GetCollectorConfigs(labels)
err = m.registerCollectors(collectorConfigs, cont)
if err != nil {
glog.Infof("failed to register collectors for %q: %v", containerName, err)
}
// Add the container name and all its aliases. The aliases must be within the namespace of the factory.
m.containers[namespacedName] = cont
for _, alias := range cont.info.Aliases {
m.containers[namespacedContainerName{
Namespace: cont.info.Namespace,
Name: alias,
}] = cont
}
glog.V(3).Infof("Added container: %q (aliases: %v, namespace: %q)", containerName, cont.info.Aliases, cont.info.Namespace)
contSpec, err := cont.handler.GetSpec()
if err != nil {
return err
}
contRef, err := cont.handler.ContainerReference()
if err != nil {
return err
}
newEvent := &info.Event{
ContainerName: contRef.Name,
Timestamp: contSpec.CreationTime,
EventType: info.EventContainerCreation,
}
err = m.eventHandler.AddEvent(newEvent)
if err != nil {
return err
}
// Start the container's housekeeping.
return cont.Start()
}
func (m *manager) destroyContainer(containerName string) error {
m.containersLock.Lock()
defer m.containersLock.Unlock()
return m.destroyContainerLocked(containerName)
}
func (m *manager) destroyContainerLocked(containerName string) error {
namespacedName := namespacedContainerName{
Name: containerName,
}
cont, ok := m.containers[namespacedName]
if !ok {
// Already destroyed, done.
return nil
}
// Tell the container to stop.
err := cont.Stop()
if err != nil {
return err
}
// Remove the container from our records (and all its aliases).
delete(m.containers, namespacedName)
for _, alias := range cont.info.Aliases {
delete(m.containers, namespacedContainerName{
Namespace: cont.info.Namespace,
Name: alias,
})
}
glog.V(3).Infof("Destroyed container: %q (aliases: %v, namespace: %q)", containerName, cont.info.Aliases, cont.info.Namespace)
contRef, err := cont.handler.ContainerReference()
if err != nil {
return err
}
newEvent := &info.Event{
ContainerName: contRef.Name,
Timestamp: time.Now(),
EventType: info.EventContainerDeletion,
}